libiptc.c revision 841e4aed2349046eb2c0b1375139c06569a93bd0
1841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson/* Library which manipulates firewall rules. Version $Revision: 1.36 $ */ 2e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 3e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Architecture of firewall rules is as follows: 4e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * 5e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Chains go INPUT, FORWARD, OUTPUT then user chains. 6e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Each user chain starts with an ERROR node. 7e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Every chain ends with an unconditional jump: a RETURN for user chains, 8e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * and a POLICY for built-ins. 9e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher */ 10e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 11e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* (C)1999 Paul ``Rusty'' Russell - Placed under the GNU GPL (See 12e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher COPYING for details). */ 13e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 14e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#ifndef IPT_LIB_DIR 15e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#define IPT_LIB_DIR "/usr/local/lib/iptables" 16e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#endif 17e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 184e242f822ef0add1359c540ed0cf3acdf74c63f3Rusty Russell#ifndef __OPTIMIZE__ 19ec81ca7e5e5939eb0bfa4776c5c0c585efdfd1bbHarald WelteSTRUCT_ENTRY_TARGET * 2079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellGET_TARGET(STRUCT_ENTRY *e) 2130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 2230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return (void *)e + e->target_offset; 2330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 2430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#endif 2530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 26e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int sockfd = -1; 27e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic void *iptc_fn = NULL; 28e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 29e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic const char *hooknames[] 3079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell= { [HOOK_PRE_ROUTING] "PREROUTING", 3179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell [HOOK_LOCAL_IN] "INPUT", 3279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell [HOOK_FORWARD] "FORWARD", 3379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell [HOOK_LOCAL_OUT] "OUTPUT", 3410758b743d6aa076ebe2c3e8f855e73826841e71Rusty Russell [HOOK_POST_ROUTING] "POSTROUTING", 3510758b743d6aa076ebe2c3e8f855e73826841e71Rusty Russell#ifdef HOOK_DROPPING 3610758b743d6aa076ebe2c3e8f855e73826841e71Rusty Russell [HOOK_DROPPING] "DROPPING" 3710758b743d6aa076ebe2c3e8f855e73826841e71Rusty Russell#endif 38e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher}; 39e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 40e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstruct counter_map 41e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 42e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher enum { 43e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher COUNTER_MAP_NOMAP, 44e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher COUNTER_MAP_NORMAL_MAP, 451cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte COUNTER_MAP_ZEROED, 461cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte COUNTER_MAP_SET 47e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } maptype; 48e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int mappos; 49e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher}; 50e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 51e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Convenience structures */ 52e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstruct ipt_error_target 53e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 5479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET t; 5579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell char error[TABLE_MAXNAMELEN]; 56e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher}; 57e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 5830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstruct chain_cache 5930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 6079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell char name[TABLE_MAXNAMELEN]; 6130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* This is the first rule in chain. */ 6279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *start; 6330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Last rule in chain */ 6479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *end; 6530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell}; 6630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 6779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellSTRUCT_TC_HANDLE 68e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 69e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Have changes been made? */ 70e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int changed; 71e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Size in here reflects original state. */ 7279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_GETINFO info; 73e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 74e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct counter_map *counter_map; 75e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Array of hook names */ 76e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher const char **hooknames; 77e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 7830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Cached position of chain heads (NULL = no cache). */ 7930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int cache_num_chains; 8030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int cache_num_builtins; 8130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *cache_chain_heads; 8230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 8330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Chain iterator: current chain cache entry. */ 8430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *cache_chain_iteration; 8530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 8630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Rule iterator: terminal rule */ 8779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *cache_rule_end; 88175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell 89e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Number in here reflects current state. */ 90e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int new_number; 9179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_GET_ENTRIES entries; 92e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher}; 93e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 94175f64177743e5a417e98d483ef995bf7151f3bcRusty Russellstatic void 9579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellset_changed(TC_HANDLE_T h) 96175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell{ 9730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (h->cache_chain_heads) { 9830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell free(h->cache_chain_heads); 9930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads = NULL; 10030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains = 0; 10130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_iteration = NULL; 10230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_rule_end = NULL; 10330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } 104175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell h->changed = 1; 105175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell} 106175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell 107380ba5f3074a16fbaa8869d9594962d58b5f8608Harald Welte#ifdef IPTC_DEBUG 10879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic void do_check(TC_HANDLE_T h, unsigned int line); 109849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell#define CHECK(h) do { if (!getenv("IPTC_NO_CHECK")) do_check((h), __LINE__); } while(0) 11030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#else 11130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#define CHECK(h) 11230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#endif 113e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 114e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 11579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_number(const STRUCT_ENTRY *i, 11679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *seek, 117e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int *pos) 118e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 119e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (i == seek) 120e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 121e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*pos)++; 122e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 123e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 124e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 125e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic unsigned int 12679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellentry2index(const TC_HANDLE_T h, const STRUCT_ENTRY *seek) 127e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 128e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int pos = 0; 129e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 130725d97a79cf0b332ed45cb7d254915178328427dRusty Russell if (ENTRY_ITERATE(h->entries.entrytable, h->entries.size, 13179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell get_number, seek, &pos) == 0) { 132e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: offset %i not an entry!\n", 133725d97a79cf0b332ed45cb7d254915178328427dRusty Russell (char *)seek - (char *)h->entries.entrytable); 134e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 135e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 136e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return pos; 137e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 138e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 139e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 14079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_entry_n(STRUCT_ENTRY *i, 141e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int number, 142e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int *pos, 14379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY **pe) 144e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 145e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (*pos == number) { 146e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *pe = i; 147e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 148e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 149e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*pos)++; 150e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 151e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 152e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 15379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic STRUCT_ENTRY * 15479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellindex2entry(TC_HANDLE_T h, unsigned int index) 155e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 156e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int pos = 0; 15779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *ret = NULL; 158e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 159725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE(h->entries.entrytable, h->entries.size, 16079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell get_entry_n, index, &pos, &ret); 161e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 162e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 163e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 164e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 16579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic inline STRUCT_ENTRY * 16679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_entry(TC_HANDLE_T h, unsigned int offset) 167e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 168725d97a79cf0b332ed45cb7d254915178328427dRusty Russell return (STRUCT_ENTRY *)((char *)h->entries.entrytable + offset); 169e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 170e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 171e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline unsigned long 17279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellentry2offset(const TC_HANDLE_T h, const STRUCT_ENTRY *e) 173e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 174725d97a79cf0b332ed45cb7d254915178328427dRusty Russell return (char *)e - (char *)h->entries.entrytable; 175e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 176e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 177e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic unsigned long 17879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellindex2offset(TC_HANDLE_T h, unsigned int index) 179e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 180e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return entry2offset(h, index2entry(h, index)); 181e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 182e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 183e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic const char * 18479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_errorlabel(TC_HANDLE_T h, unsigned int offset) 185e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 18679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 187e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 188e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(h, offset); 18967088e73ce7707229c56987868f112051defca5aRusty Russell if (strcmp(GET_TARGET(e)->u.user.name, ERROR_TARGET) != 0) { 190e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: offset %u not an error node!\n", 191e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset); 192e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 193e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 194e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 19579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return (const char *)GET_TARGET(e)->data; 196e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 197e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 198e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Allocate handle of given size */ 19979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic TC_HANDLE_T 200e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucheralloc_handle(const char *tablename, unsigned int size, unsigned int num_rules) 201e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 202e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher size_t len; 20379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T h; 204e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 20579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell len = sizeof(STRUCT_TC_HANDLE) 206e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher + size 207e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher + num_rules * sizeof(struct counter_map); 208e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 209e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((h = malloc(len)) == NULL) { 210e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 211e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 212e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 213e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 214e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->changed = 0; 21530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains = 0; 21630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads = NULL; 217e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->counter_map = (void *)h 21879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell + sizeof(STRUCT_TC_HANDLE) 219e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher + size; 220e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(h->info.name, tablename); 221e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(h->entries.name, tablename); 222e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 223e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return h; 224e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 225e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 22679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_HANDLE_T 22779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_INIT(const char *tablename) 228e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 22979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T h; 23079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_GETINFO info; 231e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 232e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int tmp; 233e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher socklen_t s; 234e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 23579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_INIT; 236e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 237366454bc69f781fdafc3a30eb6dd77155ee4efb6Harald Welte if (sockfd != -1) 238366454bc69f781fdafc3a30eb6dd77155ee4efb6Harald Welte close(sockfd); 239366454bc69f781fdafc3a30eb6dd77155ee4efb6Harald Welte 240841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson if (strlen(tablename) >= TABLE_MAXNAMELEN) { 241841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson errno = EINVAL; 242841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson return NULL; 243841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson } 244841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson 24579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell sockfd = socket(TC_AF, SOCK_RAW, IPPROTO_RAW); 246e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (sockfd < 0) 247e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 248e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 249e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher s = sizeof(info); 250841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson 251e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(info.name, tablename); 25279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (getsockopt(sockfd, TC_IPPROTO, SO_GET_INFO, &info, &s) < 0) 253e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 254e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 255e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((h = alloc_handle(info.name, info.size, info.num_entries)) 256841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson == NULL) { 257841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson close(sockfd); 258e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 259841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson } 260e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 261e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Too hard --RR */ 262e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#if 0 263e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sprintf(pathname, "%s/%s", IPT_LIB_DIR, info.name); 264e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher dynlib = dlopen(pathname, RTLD_NOW); 265e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!dynlib) { 266e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 267e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 268e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 269e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->hooknames = dlsym(dynlib, "hooknames"); 270e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!h->hooknames) { 271e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 272e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 273e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 274e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#else 275e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->hooknames = hooknames; 276e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#endif 277e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 278e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Initialize current state */ 279e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->info = info; 280e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->new_number = h->info.num_entries; 281e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (i = 0; i < h->info.num_entries; i++) 282e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->counter_map[i] 283e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher = ((struct counter_map){COUNTER_MAP_NORMAL_MAP, i}); 284e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 285e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->entries.size = h->info.size; 286e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 28779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell tmp = sizeof(STRUCT_GET_ENTRIES) + h->info.size; 288e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 28979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (getsockopt(sockfd, TC_IPPROTO, SO_GET_ENTRIES, &h->entries, 290e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher &tmp) < 0) { 291841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson close(sockfd); 292e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(h); 293e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 294e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 2957e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 296e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(h); 297e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return h; 298e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 299e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 300841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefssonvoid 301841e4aed2349046eb2c0b1375139c06569a93bd0Martin JosefssonTC_FREE(TC_HANDLE_T *h) 302841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson{ 303841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson close(sockfd); 304841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson if ((*h)->cache_chain_heads) 305841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson free((*h)->cache_chain_heads); 306841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson free(*h); 307841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson *h = NULL; 308841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson} 309841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson 310e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 31179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellprint_match(const STRUCT_ENTRY_MATCH *m) 312e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 313228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell printf("Match name: `%s'\n", m->u.user.name); 314e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 315e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 316e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 31779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic int dump_entry(STRUCT_ENTRY *e, const TC_HANDLE_T handle); 31879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell 319e6869a8f59d779ff4d5a0984c86d80db7078496Marc Bouchervoid 32079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_DUMP_ENTRIES(const TC_HANDLE_T handle) 321e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 322e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(handle); 323e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 324e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("libiptc v%s. %u entries, %u bytes.\n", 32580fe35d6339b53a12ddaec41885613e4e37ed031Harald Welte IPTABLES_VERSION, 326e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher handle->new_number, handle->entries.size); 327e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("Table `%s'\n", handle->info.name); 328e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("Hooks: pre/in/fwd/out/post = %u/%u/%u/%u/%u\n", 32967088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_PRE_ROUTING], 33067088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_LOCAL_IN], 33167088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_FORWARD], 33267088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_LOCAL_OUT], 33367088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_POST_ROUTING]); 334e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("Underflows: pre/in/fwd/out/post = %u/%u/%u/%u/%u\n", 33567088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_PRE_ROUTING], 33667088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_LOCAL_IN], 33767088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_FORWARD], 33867088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_LOCAL_OUT], 33967088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_POST_ROUTING]); 340e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 341725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE(handle->entries.entrytable, handle->entries.size, 34279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell dump_entry, handle); 343e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 344e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 34530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Returns 0 if not hook entry, else hooknumber + 1 */ 34630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstatic inline unsigned int 34779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellis_hook_entry(STRUCT_ENTRY *e, TC_HANDLE_T h) 34830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 34930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int i; 35030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 35179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 35230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((h->info.valid_hooks & (1 << i)) 35330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell && get_entry(h, h->info.hook_entry[i]) == e) 35430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return i+1; 35530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } 35630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return 0; 35730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 35830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 359e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 36079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russelladd_chain(STRUCT_ENTRY *e, TC_HANDLE_T h, STRUCT_ENTRY **prev) 361e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 36230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int builtin; 363e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 36430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Last entry. End it. */ 36530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (entry2offset(h, e) + e->next_offset == h->entries.size) { 36630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* This is the ERROR node at end of the table */ 36730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains-1].end = *prev; 36830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return 0; 36930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } 370e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 37130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* We know this is the start of a new chain if it's an ERROR 37230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell target, or a hook entry point */ 37367088e73ce7707229c56987868f112051defca5aRusty Russell if (strcmp(GET_TARGET(e)->u.user.name, ERROR_TARGET) == 0) { 37430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* prev was last entry in previous chain */ 37530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains-1].end 37630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = *prev; 37730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 37830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell strcpy(h->cache_chain_heads[h->cache_num_chains].name, 37979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell (const char *)GET_TARGET(e)->data); 38030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains].start 38130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = (void *)e + e->next_offset; 38230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains++; 38330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } else if ((builtin = is_hook_entry(e, h)) != 0) { 38430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (h->cache_num_chains > 0) 38530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* prev was last entry in previous chain */ 38630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains-1].end 38730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = *prev; 38830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 38930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell strcpy(h->cache_chain_heads[h->cache_num_chains].name, 39030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->hooknames[builtin-1]); 39130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains].start 39230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = (void *)e; 39330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains++; 39430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } 39530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 39630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell *prev = e; 397e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 398e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 399e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 40030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstatic int alphasort(const void *a, const void *b) 40130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 40230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return strcmp(((struct chain_cache *)a)->name, 40330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell ((struct chain_cache *)b)->name); 40430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 40530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 40679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic int populate_cache(TC_HANDLE_T h) 407e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 408e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 40979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *prev; 410e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 41130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* # chains < # rules / 2 + num builtins - 1 */ 41230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads = malloc((h->new_number / 2 + 4) 41330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell * sizeof(struct chain_cache)); 41430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!h->cache_chain_heads) { 41530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell errno = ENOMEM; 41630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return 0; 417175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell } 418175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell 41930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains = 0; 42030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_builtins = 0; 42130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 42230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Count builtins */ 42379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 42430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (h->info.valid_hooks & (1 << i)) 42530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_builtins++; 426e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 427e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 42830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell prev = NULL; 429725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE(h->entries.entrytable, h->entries.size, 43079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell add_chain, h, &prev); 43130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 43230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell qsort(h->cache_chain_heads + h->cache_num_builtins, 43330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains - h->cache_num_builtins, 43430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell sizeof(struct chain_cache), alphasort); 43530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 43630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return 1; 43730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 43830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 43930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Returns cache ptr if found, otherwise NULL. */ 44030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstatic struct chain_cache * 44179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellfind_label(const char *name, TC_HANDLE_T handle) 44230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 443849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell unsigned int i; 44430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 44530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (handle->cache_chain_heads == NULL 44630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell && !populate_cache(handle)) 44730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 44830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 449849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell /* FIXME: Linear search through builtins, then binary --RR */ 450849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell for (i = 0; i < handle->cache_num_chains; i++) { 451849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell if (strcmp(handle->cache_chain_heads[i].name, name) == 0) 452849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell return &handle->cache_chain_heads[i]; 453e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 454e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 455849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell return NULL; 456e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 457e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 458e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Does this chain exist? */ 45979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellint TC_IS_CHAIN(const char *chain, const TC_HANDLE_T handle) 460e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 46130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return find_label(chain, handle) != NULL; 462e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 463e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 464e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Returns the position of the final (ie. unconditional) element. */ 465e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic unsigned int 46679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_chain_end(const TC_HANDLE_T handle, unsigned int start) 467e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 468e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int last_off, off; 46979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 470e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 471e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher last_off = start; 472e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(handle, start); 473e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 474e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Terminate when we meet a error label or a hook entry. */ 475e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (off = start + e->next_offset; 476e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher off < handle->entries.size; 477e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher last_off = off, off += e->next_offset) { 47879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET *t; 479e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 480e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 481e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(handle, off); 482e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 483e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* We hit an entry point. */ 48479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 485e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((handle->info.valid_hooks & (1 << i)) 486e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && off == handle->info.hook_entry[i]) 487e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return last_off; 488e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 489e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 490e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* We hit a user chain label */ 49179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell t = GET_TARGET(e); 49267088e73ce7707229c56987868f112051defca5aRusty Russell if (strcmp(t->u.user.name, ERROR_TARGET) == 0) 493e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return last_off; 494e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 495e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* SHOULD NEVER HAPPEN */ 496e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: Off end (%u) of chain from %u!\n", 497e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher handle->entries.size, off); 498e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 499e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 500e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 50130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Iterator functions to run through the chains. */ 502e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherconst char * 5038c700900e2a0cf87d7917cb62578583a60ad1210Philip BlundellTC_FIRST_CHAIN(TC_HANDLE_T *handle) 504e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 50530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((*handle)->cache_chain_heads == NULL 50630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell && !populate_cache(*handle)) 507e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 508e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 50930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell (*handle)->cache_chain_iteration 51030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = &(*handle)->cache_chain_heads[0]; 51130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 51230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return (*handle)->cache_chain_iteration->name; 51330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 51430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 51530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Iterator functions to run through the chains. Returns NULL at end. */ 51630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellconst char * 51779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_NEXT_CHAIN(TC_HANDLE_T *handle) 51830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 51930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell (*handle)->cache_chain_iteration++; 52030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 52130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((*handle)->cache_chain_iteration - (*handle)->cache_chain_heads 522841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson == (*handle)->cache_num_chains) 52330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 52430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 52530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return (*handle)->cache_chain_iteration->name; 52630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 52730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 52830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Get first rule in the given chain: NULL for empty chain. */ 52979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellconst STRUCT_ENTRY * 5308c700900e2a0cf87d7917cb62578583a60ad1210Philip BlundellTC_FIRST_RULE(const char *chain, TC_HANDLE_T *handle) 53130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 53230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 53330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 53430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell c = find_label(chain, *handle); 53530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!c) { 53630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell errno = ENOENT; 53730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 538e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 539e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 54030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Empty chain: single return/policy rule */ 54130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (c->start == c->end) 54230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 54330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 54430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell (*handle)->cache_rule_end = c->end; 54530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return c->start; 546e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 547e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 54830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Returns NULL when rules run out. */ 54979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellconst STRUCT_ENTRY * 5508c700900e2a0cf87d7917cb62578583a60ad1210Philip BlundellTC_NEXT_RULE(const STRUCT_ENTRY *prev, TC_HANDLE_T *handle) 55130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 55230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((void *)prev + prev->next_offset 55330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell == (void *)(*handle)->cache_rule_end) 55430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 55530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 55630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return (void *)prev + prev->next_offset; 55730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 55830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 55930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#if 0 560e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* How many rules in this chain? */ 561e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherunsigned int 56279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_NUM_RULES(const char *chain, TC_HANDLE_T *handle) 563e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 564e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int off = 0; 56579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *start, *end; 566e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 567e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(*handle); 568e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!find_label(&off, chain, *handle)) { 569e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 570e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return (unsigned int)-1; 571e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 572e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 573e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher start = get_entry(*handle, off); 574e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher end = get_entry(*handle, get_chain_end(*handle, off)); 575e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 576e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return entry2index(*handle, end) - entry2index(*handle, start); 577e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 578e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 579e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Get n'th rule in this chain. */ 58079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellconst STRUCT_ENTRY *TC_GET_RULE(const char *chain, 58179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned int n, 58279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 583e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 584e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int pos = 0, chainindex; 585e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 586e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(*handle); 587e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!find_label(&pos, chain, *handle)) { 588e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 589e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 590e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 591e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 592e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher chainindex = entry2index(*handle, get_entry(*handle, pos)); 593e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 594e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return index2entry(*handle, chainindex + n); 595e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 59630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#endif 597e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 59830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstatic const char * 59979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russelltarget_name(TC_HANDLE_T handle, const STRUCT_ENTRY *ce) 600e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 601e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int spos; 602e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int labelidx; 60379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *jumpto; 604e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 60530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* To avoid const warnings */ 60679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e = (STRUCT_ENTRY *)ce; 60730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 60879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strcmp(GET_TARGET(e)->u.user.name, STANDARD_TARGET) != 0) 60979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return GET_TARGET(e)->u.user.name; 610e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 611e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Standard target: evaluate */ 61279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell spos = *(int *)GET_TARGET(e)->data; 613e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (spos < 0) { 61479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (spos == RETURN) 61579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return LABEL_RETURN; 616e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else if (spos == -NF_ACCEPT-1) 61779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return LABEL_ACCEPT; 618e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else if (spos == -NF_DROP-1) 61979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return LABEL_DROP; 6202f4e5d92c73906e0dc2ae42fee5c05740528e92bJames Morris else if (spos == -NF_QUEUE-1) 62167088e73ce7707229c56987868f112051defca5aRusty Russell return LABEL_QUEUE; 622e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 623e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: off %lu/%u not a valid target (%i)\n", 624e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher entry2offset(handle, e), handle->entries.size, 625e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher spos); 626e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 627e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 628e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 629e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher jumpto = get_entry(handle, spos); 630e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 631e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Fall through rule */ 632e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (jumpto == (void *)e + e->next_offset) 633e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ""; 634e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 635e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Must point to head of a chain: ie. after error rule */ 636e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher labelidx = entry2index(handle, jumpto) - 1; 637e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return get_errorlabel(handle, index2offset(handle, labelidx)); 638e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 639e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 640e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Returns a pointer to the target name of this position. */ 64179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellconst char *TC_GET_TARGET(const STRUCT_ENTRY *e, 64279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 643e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 644e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return target_name(*handle, e); 645e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 646e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 647e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Is this a built-in chain? Actually returns hook + 1. */ 648e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 64979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_BUILTIN(const char *chain, const TC_HANDLE_T handle) 650e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 651e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 652e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 65379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 654e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((handle->info.valid_hooks & (1 << i)) 655e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && handle->hooknames[i] 656e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && strcmp(handle->hooknames[i], chain) == 0) 657e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return i+1; 658e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 659e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 660e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 661e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 662e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Get the policy of a given built-in chain */ 663e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherconst char * 66479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_GET_POLICY(const char *chain, 66579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_COUNTERS *counters, 66679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 667e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 668e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int start; 66979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 670e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int hook; 671e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 67279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell hook = TC_BUILTIN(chain, *handle); 673e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (hook != 0) 674e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher start = (*handle)->info.hook_entry[hook-1]; 675e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else 676e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 677e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 678e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(*handle, get_chain_end(*handle, start)); 679e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *counters = e->counters; 680e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 681e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return target_name(*handle, e); 682e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 683e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 684e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 68579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellcorrect_verdict(STRUCT_ENTRY *e, 686725d97a79cf0b332ed45cb7d254915178328427dRusty Russell char *base, 687e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int offset, int delta_offset) 688e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 68979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET *t = (void *)GET_TARGET(e); 690725d97a79cf0b332ed45cb7d254915178328427dRusty Russell unsigned int curr = (char *)e - base; 691e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 692e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Trap: insert of fall-through rule. Don't change fall-through 693e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher verdict to jump-over-next-rule. */ 69479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strcmp(t->target.u.user.name, STANDARD_TARGET) == 0 695e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && t->verdict > (int)offset 696e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && !(curr == offset && 697e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict == curr + e->next_offset)) { 698e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict += delta_offset; 699e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 700e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 701e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 702e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 703e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 704e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Adjusts standard verdict jump positions after an insertion/deletion. */ 705e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 70679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellset_verdict(unsigned int offset, int delta_offset, TC_HANDLE_T *handle) 707e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 708725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE((*handle)->entries.entrytable, 70979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell (*handle)->entries.size, 710725d97a79cf0b332ed45cb7d254915178328427dRusty Russell correct_verdict, (char *)(*handle)->entries.entrytable, 71179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell offset, delta_offset); 712e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 713175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell set_changed(*handle); 714e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 715e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 716e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 717e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* If prepend is set, then we are prepending to a chain: if the 718e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * insertion position is an entry point, keep the entry point. */ 719e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 720e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherinsert_rules(unsigned int num_rules, unsigned int rules_size, 72179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *insert, 722e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int offset, unsigned int num_rules_offset, 723e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int prepend, 72479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 725e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 72679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T newh; 72779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_GETINFO newinfo; 728e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 729e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 730e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (offset >= (*handle)->entries.size) { 731e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 732e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 733e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 734e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 735e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newinfo = (*handle)->info; 736e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 737e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Fix up entry points. */ 73879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 739e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Entry points to START of chain, so keep same if 740e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher inserting on at that point. */ 741e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->info.hook_entry[i] > offset) 742e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newinfo.hook_entry[i] += rules_size; 743e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 744e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Underflow always points to END of chain (policy), 745e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher so if something is inserted at same point, it 746e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher should be advanced. */ 747e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->info.underflow[i] >= offset) 748e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newinfo.underflow[i] += rules_size; 749e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 750e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 751e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh = alloc_handle((*handle)->info.name, 7523c7a6c479f3eccd65a78dc103f33f4085e8e4703Rusty Russell (*handle)->entries.size + rules_size, 7531de804642d4c8e9c71b7e225a1528fff15fa7faaHarald Welte (*handle)->new_number + num_rules); 754e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!newh) 755e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 756e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->info = newinfo; 757e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 758e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Copy pre... */ 759725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memcpy(newh->entries.entrytable, (*handle)->entries.entrytable,offset); 760e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* ... Insert new ... */ 761725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memcpy((char *)newh->entries.entrytable + offset, insert, rules_size); 762e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* ... copy post */ 763725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memcpy((char *)newh->entries.entrytable + offset + rules_size, 764725d97a79cf0b332ed45cb7d254915178328427dRusty Russell (char *)(*handle)->entries.entrytable + offset, 765e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->entries.size - offset); 766e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 767e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Move counter map. */ 768e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Copy pre... */ 769e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(newh->counter_map, (*handle)->counter_map, 770e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(struct counter_map) * num_rules_offset); 771e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* ... copy post */ 772e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(newh->counter_map + num_rules_offset + num_rules, 773e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->counter_map + num_rules_offset, 774e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(struct counter_map) * ((*handle)->new_number 775e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher - num_rules_offset)); 776e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Set intermediates to no counter copy */ 777e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (i = 0; i < num_rules; i++) 778e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->counter_map[num_rules_offset+i] 779e0072945b57dc499327567640648050563b19a5eHarald Welte = ((struct counter_map){ COUNTER_MAP_SET, 0 }); 780e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 781e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->new_number = (*handle)->new_number + num_rules; 782e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->entries.size = (*handle)->entries.size + rules_size; 783e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->hooknames = (*handle)->hooknames; 784e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 78530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((*handle)->cache_chain_heads) 78630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell free((*handle)->cache_chain_heads); 787e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(*handle); 788e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *handle = newh; 789e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 790e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return set_verdict(offset, rules_size, handle); 791e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 792e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 793e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 794e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherdelete_rules(unsigned int num_rules, unsigned int rules_size, 795e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int offset, unsigned int num_rules_offset, 79679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 797e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 798e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 799e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 800e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (offset + rules_size > (*handle)->entries.size) { 801e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 802e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 803e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 804e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 805e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Fix up entry points. */ 80679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 807e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* In practice, we never delete up to a hook entry, 808e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher since the built-in chains are always first, 809e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher so these two are never equal */ 810e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->info.hook_entry[i] >= offset + rules_size) 811e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->info.hook_entry[i] -= rules_size; 812e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else if ((*handle)->info.hook_entry[i] > offset) { 813e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: Deleting entry %u %u %u\n", 814e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher i, (*handle)->info.hook_entry[i], offset); 815e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 816e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 817e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 818e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Underflow points to policy (terminal) rule in 819e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher built-in, so sequality is valid here (when deleting 820e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher the last rule). */ 821e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->info.underflow[i] >= offset + rules_size) 822e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->info.underflow[i] -= rules_size; 823e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else if ((*handle)->info.underflow[i] > offset) { 824e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: Deleting uflow %u %u %u\n", 825e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher i, (*handle)->info.underflow[i], offset); 826e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 827e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 828e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 829e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 830e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Move the rules down. */ 831725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memmove((char *)(*handle)->entries.entrytable + offset, 832725d97a79cf0b332ed45cb7d254915178328427dRusty Russell (char *)(*handle)->entries.entrytable + offset + rules_size, 833e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->entries.size - (offset + rules_size)); 834e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 835e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Move the counter map down. */ 836e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memmove(&(*handle)->counter_map[num_rules_offset], 837e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher &(*handle)->counter_map[num_rules_offset + num_rules], 838e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(struct counter_map) 839e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * ((*handle)->new_number - (num_rules + num_rules_offset))); 840e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 841e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Fix numbers */ 842e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->new_number -= num_rules; 843e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->entries.size -= rules_size; 844e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 845e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return set_verdict(offset, -(int)rules_size, handle); 846e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 847e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 848e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 84979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstandard_map(STRUCT_ENTRY *e, int verdict) 850e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 85179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET *t; 852e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 85379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell t = (STRUCT_STANDARD_TARGET *)GET_TARGET(e); 854e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 85567088e73ce7707229c56987868f112051defca5aRusty Russell if (t->target.u.target_size 8568c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell != ALIGN(sizeof(STRUCT_STANDARD_TARGET))) { 857e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 858e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 859e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 860e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* memset for memcmp convenience on delete/replace */ 86179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell memset(t->target.u.user.name, 0, FUNCTION_MAXNAMELEN); 86279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell strcpy(t->target.u.user.name, STANDARD_TARGET); 863e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict = verdict; 864e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 865e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 866e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 8677e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 868e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 86979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellmap_target(const TC_HANDLE_T handle, 87079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e, 871e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int offset, 87279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET *old) 873e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 87479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET *t = GET_TARGET(e); 875e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 876e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Save old target (except data, which we don't change, except for 877e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher standard case, where we don't care). */ 878e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *old = *t; 879e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 880e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Maybe it's empty (=> fall through) */ 881228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell if (strcmp(t->u.user.name, "") == 0) 882e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return standard_map(e, offset + e->next_offset); 883e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Maybe it's a standard target name... */ 88479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (strcmp(t->u.user.name, LABEL_ACCEPT) == 0) 885e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return standard_map(e, -NF_ACCEPT - 1); 88679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (strcmp(t->u.user.name, LABEL_DROP) == 0) 887e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return standard_map(e, -NF_DROP - 1); 88867088e73ce7707229c56987868f112051defca5aRusty Russell else if (strcmp(t->u.user.name, LABEL_QUEUE) == 0) 889e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return standard_map(e, -NF_QUEUE - 1); 89079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (strcmp(t->u.user.name, LABEL_RETURN) == 0) 89179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return standard_map(e, RETURN); 89279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (TC_BUILTIN(t->u.user.name, handle)) { 893e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Can't jump to builtins. */ 894e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 895e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 896e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } else { 897e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Maybe it's an existing chain name. */ 89830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 899e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 900228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell c = find_label(t->u.user.name, handle); 90130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (c) 90230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return standard_map(e, entry2offset(handle, c->start)); 903e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 904e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 905e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Must be a module? If not, kernel will reject... */ 906e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* memset to all 0 for your memcmp convenience. */ 907228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell memset(t->u.user.name + strlen(t->u.user.name), 908e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 0, 90979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell FUNCTION_MAXNAMELEN - strlen(t->u.user.name)); 910e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 911e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 912e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 913e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic void 91479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellunmap_target(STRUCT_ENTRY *e, STRUCT_ENTRY_TARGET *old) 915e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 91679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET *t = GET_TARGET(e); 917e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 918e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Save old target (except data, which we don't change, except for 919e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher standard case, where we don't care). */ 920e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *t = *old; 921e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 922e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 923e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Insert the entry `fw' in chain `chain' into position `rulenum'. */ 924e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 92579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_INSERT_ENTRY(const IPT_CHAINLABEL chain, 92679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *e, 92779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned int rulenum, 92879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 929e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 93030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int chainindex, offset; 93179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET old; 93230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 93314a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell STRUCT_ENTRY *tmp; 934e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 935e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 93679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_INSERT_ENTRY; 93730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 938e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 939e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 940e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 941e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 94230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell chainindex = entry2index(*handle, c->start); 943e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 94414a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell tmp = index2entry(*handle, chainindex + rulenum); 94514a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell if (!tmp || tmp > c->end) { 946e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = E2BIG; 947e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 948e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 949e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset = index2offset(*handle, chainindex + rulenum); 950e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 951e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Mapping target actually alters entry, but that's 952e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher transparent to the caller. */ 95379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (!map_target(*handle, (STRUCT_ENTRY *)e, offset, &old)) 954e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 955e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 956e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = insert_rules(1, e->next_offset, e, offset, 957e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher chainindex + rulenum, rulenum == 0, handle); 95879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unmap_target((STRUCT_ENTRY *)e, &old); 959e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 960e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 961e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 962e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Atomically replace rule `rulenum' in `chain' with `fw'. */ 963e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 96479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_REPLACE_ENTRY(const IPT_CHAINLABEL chain, 96579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *e, 96679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned int rulenum, 96779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 968e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 96930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int chainindex, offset; 97079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET old; 97130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 97214a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell STRUCT_ENTRY *tmp; 973e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 974e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 97579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_REPLACE_ENTRY; 976e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 97730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 978e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 979e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 980e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 981e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 98230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell chainindex = entry2index(*handle, c->start); 983e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 98414a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell tmp = index2entry(*handle, chainindex + rulenum); 98514a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell if (!tmp || tmp >= c->end) { 986e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = E2BIG; 987e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 988e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 989e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 990e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset = index2offset(*handle, chainindex + rulenum); 991e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Replace = delete and insert. */ 992e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!delete_rules(1, get_entry(*handle, offset)->next_offset, 993e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset, chainindex + rulenum, handle)) 994e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 995e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 99679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (!map_target(*handle, (STRUCT_ENTRY *)e, offset, &old)) 997e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 998e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 999e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = insert_rules(1, e->next_offset, e, offset, 1000e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher chainindex + rulenum, 1, handle); 100179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unmap_target((STRUCT_ENTRY *)e, &old); 1002e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1003e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1004e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1005e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Append entry `fw' to chain `chain'. Equivalent to insert with 1006e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher rulenum = length of chain. */ 1007e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 100879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_APPEND_ENTRY(const IPT_CHAINLABEL chain, 100979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *e, 101079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1011e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 101230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 101379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET old; 1014e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 1015e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 101679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_APPEND_ENTRY; 101730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1018e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1019e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1020e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1021e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 102279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (!map_target(*handle, (STRUCT_ENTRY *)e, 102330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell entry2offset(*handle, c->end), &old)) 1024e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1025e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 102630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell ret = insert_rules(1, e->next_offset, e, 102730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell entry2offset(*handle, c->end), 102830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell entry2index(*handle, c->end), 1029e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 0, handle); 103079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unmap_target((STRUCT_ENTRY *)e, &old); 1031e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1032e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1033e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1034e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 103579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellmatch_different(const STRUCT_ENTRY_MATCH *a, 1036edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell const unsigned char *a_elems, 1037edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell const unsigned char *b_elems, 1038edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell unsigned char **maskptr) 1039e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 104079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY_MATCH *b; 1041edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell unsigned int i; 1042e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1043e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Offset of b is the same as a. */ 104430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell b = (void *)b_elems + ((unsigned char *)a - a_elems); 1045e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1046228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell if (a->u.match_size != b->u.match_size) 1047e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1048e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1049228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell if (strcmp(a->u.user.name, b->u.user.name) != 0) 1050e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1051e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 105273ef09b21573ddb17ff75e5fd06fd4b52ec8ea40Rusty Russell *maskptr += ALIGN(sizeof(*a)); 1053edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell 105473ef09b21573ddb17ff75e5fd06fd4b52ec8ea40Rusty Russell for (i = 0; i < a->u.match_size - ALIGN(sizeof(*a)); i++) 1055edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell if (((a->data[i] ^ b->data[i]) & (*maskptr)[i]) != 0) 1056edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell return 1; 1057edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell *maskptr += i; 1058edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell return 0; 1059edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell} 1060edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell 1061edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russellstatic inline int 1062edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russelltarget_different(const unsigned char *a_targdata, 1063edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell const unsigned char *b_targdata, 1064edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell unsigned int tdatasize, 1065edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell const unsigned char *mask) 1066edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell{ 1067edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell unsigned int i; 1068edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell for (i = 0; i < tdatasize; i++) 1069edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell if (((a_targdata[i] ^ b_targdata[i]) & mask[i]) != 0) 107090e712a00913fe2a2f885142439c392392dc08a8Rusty Russell return 1; 1071e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1072e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1073e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1074e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 107579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic int 107679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellis_same(const STRUCT_ENTRY *a, 107779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *b, 107879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned char *matchmask); 1079e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1080e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Delete the first rule in `chain' which matches `fw'. */ 1081e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 108279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_DELETE_ENTRY(const IPT_CHAINLABEL chain, 108379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *origfw, 108479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned char *matchmask, 108579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1086e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 108730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int offset; 108830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 108979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e, *fw; 1090e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 109179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_DELETE_ENTRY; 109230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1093e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1094e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1095e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1096e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1097e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fw = malloc(origfw->next_offset); 1098e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (fw == NULL) { 1099e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 1100e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1101e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1102e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 110330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell for (offset = entry2offset(*handle, c->start); 110430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell offset < entry2offset(*handle, c->end); 110530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell offset += e->next_offset) { 110679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET discard; 1107e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1108e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(fw, origfw, origfw->next_offset); 1109e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1110e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* FIXME: handle this in is_same --RR */ 1111e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!map_target(*handle, fw, offset, &discard)) { 1112e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(fw); 1113e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1114e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1115e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(*handle, offset); 1116e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1117e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#if 0 1118e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("Deleting:\n"); 1119e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher dump_entry(newe); 1120e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#endif 1121edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell if (is_same(e, fw, matchmask)) { 1122e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 1123e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = delete_rules(1, e->next_offset, 1124e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset, entry2index(*handle, e), 1125e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher handle); 1126e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(fw); 1127e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1128e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1129e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1130e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1131e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(fw); 1132e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1133e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 11347e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell} 1135e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1136e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Delete the rule in position `rulenum' in `chain'. */ 1137e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 113879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_DELETE_NUM_ENTRY(const IPT_CHAINLABEL chain, 113979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned int rulenum, 114079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1141e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1142e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int index; 1143e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 114479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 114530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1146e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 114779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_DELETE_NUM_ENTRY; 114830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1149e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1150e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1151e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1152e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 115330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell index = entry2index(*handle, c->start) + rulenum; 1154e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 115530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (index >= entry2index(*handle, c->end)) { 1156e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = E2BIG; 1157e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1158e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1159e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1160e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = index2entry(*handle, index); 1161e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (e == NULL) { 1162e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1163e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1164e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1165e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1166e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = delete_rules(1, e->next_offset, entry2offset(*handle, e), 1167e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher index, handle); 1168e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1169e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1170e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1171e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Check the packet `fw' on chain `chain'. Returns the verdict, or 1172e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher NULL and sets errno. */ 1173e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherconst char * 117479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_CHECK_PACKET(const IPT_CHAINLABEL chain, 117579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *entry, 117679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1177e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1178e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOSYS; 1179e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 1180e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1181e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1182e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Flushes the entries in the given chain (ie. empties chain). */ 1183e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 118479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_FLUSH_ENTRIES(const IPT_CHAINLABEL chain, TC_HANDLE_T *handle) 1185e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 118630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int startindex, endindex; 118730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1188e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 1189e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 119079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_FLUSH_ENTRIES; 119130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1192e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1193e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1194e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 119530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell startindex = entry2index(*handle, c->start); 119630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell endindex = entry2index(*handle, c->end); 1197e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1198e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = delete_rules(endindex - startindex, 119930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell (char *)c->end - (char *)c->start, 120030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell entry2offset(*handle, c->start), startindex, 1201e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher handle); 1202e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1203e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1204e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1205e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Zeroes the counters in a chain. */ 1206e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 120779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_ZERO_ENTRIES(const IPT_CHAINLABEL chain, TC_HANDLE_T *handle) 1208e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1209e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i, end; 121030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 12117e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 121230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1213e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1214e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1215e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1216e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 121730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell i = entry2index(*handle, c->start); 121830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell end = entry2index(*handle, c->end); 1219e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1220e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (; i <= end; i++) { 1221e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->counter_map[i].maptype ==COUNTER_MAP_NORMAL_MAP) 1222e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->counter_map[i].maptype = COUNTER_MAP_ZEROED; 1223e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1224175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell set_changed(*handle); 1225e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1226e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1227e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1228e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 12291cef74d943055668b5e356eebea877fdaa1ce3e0Harald WelteSTRUCT_COUNTERS * 12301cef74d943055668b5e356eebea877fdaa1ce3e0Harald WelteTC_READ_COUNTER(const IPT_CHAINLABEL chain, 12311cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte unsigned int rulenum, 12321cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte TC_HANDLE_T *handle) 12331cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte{ 12341cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte STRUCT_ENTRY *e; 12351cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte struct chain_cache *c; 12361cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte unsigned int chainindex, end; 12371cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12381cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte iptc_fn = TC_READ_COUNTER; 12391cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte CHECK(*handle); 12401cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12411cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte if (!(c = find_label(chain, *handle))) { 12421cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte errno = ENOENT; 12431cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte return NULL; 12441cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte } 12451cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12461cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte chainindex = entry2index(*handle, c->start); 12471cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte end = entry2index(*handle, c->end); 12481cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12491cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte if (chainindex + rulenum > end) { 12501cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte errno = E2BIG; 12511cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte return NULL; 12521cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte } 12531cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12541cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte e = index2entry(*handle, chainindex + rulenum); 12551cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12561cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte return &e->counters; 12571cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte} 12581cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12591cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welteint 12601cef74d943055668b5e356eebea877fdaa1ce3e0Harald WelteTC_ZERO_COUNTER(const IPT_CHAINLABEL chain, 12611cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte unsigned int rulenum, 12621cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte TC_HANDLE_T *handle) 12631cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte{ 12641cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte STRUCT_ENTRY *e; 12651cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte struct chain_cache *c; 12661cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte unsigned int chainindex, end; 12671cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12681cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte iptc_fn = TC_ZERO_COUNTER; 12691cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte CHECK(*handle); 12701cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12711cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte if (!(c = find_label(chain, *handle))) { 12721cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte errno = ENOENT; 12731cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte return 0; 12741cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte } 12751cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12761cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte chainindex = entry2index(*handle, c->start); 12771cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte end = entry2index(*handle, c->end); 12781cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12791cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte if (chainindex + rulenum > end) { 12801cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte errno = E2BIG; 12811cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte return 0; 12821cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte } 12831cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12841cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte e = index2entry(*handle, chainindex + rulenum); 12851cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12861cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte if ((*handle)->counter_map[chainindex + rulenum].maptype 12871cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte == COUNTER_MAP_NORMAL_MAP) { 12881cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte (*handle)->counter_map[chainindex + rulenum].maptype 12891cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte = COUNTER_MAP_ZEROED; 12901cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte } 12911cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12921cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte set_changed(*handle); 12931cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12941cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte return 1; 12951cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte} 12961cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 12971cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welteint 12981cef74d943055668b5e356eebea877fdaa1ce3e0Harald WelteTC_SET_COUNTER(const IPT_CHAINLABEL chain, 12991cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte unsigned int rulenum, 13001cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte STRUCT_COUNTERS *counters, 13011cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte TC_HANDLE_T *handle) 13021cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte{ 13031cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte STRUCT_ENTRY *e; 13041cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte struct chain_cache *c; 13051cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte unsigned int chainindex, end; 13061cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 13071cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte iptc_fn = TC_SET_COUNTER; 13081cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte CHECK(*handle); 13091cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 13101cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte if (!(c = find_label(chain, *handle))) { 13111cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte errno = ENOENT; 13121cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte return 0; 13131cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte } 13141cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 13151cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte chainindex = entry2index(*handle, c->start); 13161cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte end = entry2index(*handle, c->end); 13171cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 13181cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte if (chainindex + rulenum > end) { 13191cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte errno = E2BIG; 13201cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte return 0; 13211cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte } 13221cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 13231cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte e = index2entry(*handle, chainindex + rulenum); 13241cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 13251cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte (*handle)->counter_map[chainindex + rulenum].maptype 13261cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte = COUNTER_MAP_SET; 13271cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 13281cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte memcpy(&e->counters, counters, sizeof(STRUCT_COUNTERS)); 13291cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 13301cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte set_changed(*handle); 13311cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 13321cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte return 1; 13331cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte} 13341cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 1335e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Creates a new chain. */ 1336e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* To create a chain, create two rules: error node and unconditional 1337e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * return. */ 1338e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 133979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_CREATE_CHAIN(const IPT_CHAINLABEL chain, TC_HANDLE_T *handle) 1340e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1341e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 1342e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct { 134379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY head; 1344e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct ipt_error_target name; 134579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY ret; 134679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET target; 1347e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } newc; 1348e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 134979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_CREATE_CHAIN; 1350e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1351e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* find_label doesn't cover built-in targets: DROP, ACCEPT, 1352e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher QUEUE, RETURN. */ 135330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (find_label(chain, *handle) 135479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(chain, LABEL_DROP) == 0 135579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(chain, LABEL_ACCEPT) == 0 135667088e73ce7707229c56987868f112051defca5aRusty Russell || strcmp(chain, LABEL_QUEUE) == 0 135779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(chain, LABEL_RETURN) == 0) { 1358e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EEXIST; 1359e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1360e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1361e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 136279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strlen(chain)+1 > sizeof(IPT_CHAINLABEL)) { 1363e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1364e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1365e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1366e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1367e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memset(&newc, 0, sizeof(newc)); 136879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell newc.head.target_offset = sizeof(STRUCT_ENTRY); 1369e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newc.head.next_offset 137067088e73ce7707229c56987868f112051defca5aRusty Russell = sizeof(STRUCT_ENTRY) 13718c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell + ALIGN(sizeof(struct ipt_error_target)); 137267088e73ce7707229c56987868f112051defca5aRusty Russell strcpy(newc.name.t.u.user.name, ERROR_TARGET); 13738c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell newc.name.t.u.target_size = ALIGN(sizeof(struct ipt_error_target)); 1374e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(newc.name.error, chain); 1375e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 137679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell newc.ret.target_offset = sizeof(STRUCT_ENTRY); 1377e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newc.ret.next_offset 137867088e73ce7707229c56987868f112051defca5aRusty Russell = sizeof(STRUCT_ENTRY) 13798c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell + ALIGN(sizeof(STRUCT_STANDARD_TARGET)); 138079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell strcpy(newc.target.target.u.user.name, STANDARD_TARGET); 138167088e73ce7707229c56987868f112051defca5aRusty Russell newc.target.target.u.target_size 13828c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell = ALIGN(sizeof(STRUCT_STANDARD_TARGET)); 138379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell newc.target.verdict = RETURN; 1384e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1385e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Add just before terminal entry */ 1386e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = insert_rules(2, sizeof(newc), &newc.head, 1387e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher index2offset(*handle, (*handle)->new_number - 1), 1388e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->new_number - 1, 1389e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 0, handle); 1390e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1391e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1392e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1393e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 139479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellcount_ref(STRUCT_ENTRY *e, unsigned int offset, unsigned int *ref) 1395e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 139679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET *t; 1397e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 139879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strcmp(GET_TARGET(e)->u.user.name, STANDARD_TARGET) == 0) { 139979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell t = (STRUCT_STANDARD_TARGET *)GET_TARGET(e); 1400e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1401e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (t->verdict == offset) 1402e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*ref)++; 1403e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1404e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1405e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1406e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1407e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1408e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Get the number of references to this chain. */ 1409e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 141079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_GET_REFERENCES(unsigned int *ref, const IPT_CHAINLABEL chain, 141179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1412e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 141330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1414e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 141530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1416e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1417e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1418e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1419e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1420e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *ref = 0; 1421725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE((*handle)->entries.entrytable, 142279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell (*handle)->entries.size, 142379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell count_ref, entry2offset(*handle, c->start), ref); 1424e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1425e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1426e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1427e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Deletes a chain. */ 1428e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 142979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_DELETE_CHAIN(const IPT_CHAINLABEL chain, TC_HANDLE_T *handle) 1430e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 143130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int labelidx, labeloff; 1432e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int references; 143330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1434e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 1435e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 143679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (!TC_GET_REFERENCES(&references, chain, handle)) 1437e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 14387e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 143979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_DELETE_CHAIN; 1440e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 144179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (TC_BUILTIN(chain, *handle)) { 1442e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1443e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1444e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1445e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1446e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (references > 0) { 1447e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EMLINK; 1448e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1449e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1450e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 145130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1452e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1453e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1454e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1455e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 145630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((void *)c->start != c->end) { 1457e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOTEMPTY; 1458e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1459e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1460e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1461e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Need label index: preceeds chain start */ 146230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell labelidx = entry2index(*handle, c->start) - 1; 1463e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher labeloff = index2offset(*handle, labelidx); 1464e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1465e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = delete_rules(2, 1466e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher get_entry(*handle, labeloff)->next_offset 146730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell + c->start->next_offset, 1468e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher labeloff, labelidx, handle); 1469e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1470e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1471e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1472e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Renames a chain. */ 147379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellint TC_RENAME_CHAIN(const IPT_CHAINLABEL oldname, 147479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const IPT_CHAINLABEL newname, 147579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1476e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 147730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int labeloff, labelidx; 147830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1479e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct ipt_error_target *t; 1480e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 148179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_RENAME_CHAIN; 1482e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 14831de804642d4c8e9c71b7e225a1528fff15fa7faaHarald Welte /* find_label doesn't cover built-in targets: DROP, ACCEPT, 14841de804642d4c8e9c71b7e225a1528fff15fa7faaHarald Welte QUEUE, RETURN. */ 148530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (find_label(newname, *handle) 148679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(newname, LABEL_DROP) == 0 148779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(newname, LABEL_ACCEPT) == 0 14881de804642d4c8e9c71b7e225a1528fff15fa7faaHarald Welte || strcmp(newname, LABEL_QUEUE) == 0 148979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(newname, LABEL_RETURN) == 0) { 1490e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EEXIST; 1491e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1492e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1493e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 149430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(oldname, *handle)) 149579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || TC_BUILTIN(oldname, *handle)) { 1496e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1497e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1498e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1499e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 150079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strlen(newname)+1 > sizeof(IPT_CHAINLABEL)) { 1501e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1502e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1503e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1504e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1505e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Need label index: preceeds chain start */ 150630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell labelidx = entry2index(*handle, c->start) - 1; 1507e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher labeloff = index2offset(*handle, labelidx); 1508e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1509e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t = (struct ipt_error_target *) 151079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell GET_TARGET(get_entry(*handle, labeloff)); 1511e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1512e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memset(t->error, 0, sizeof(t->error)); 1513e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(t->error, newname); 1514175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell set_changed(*handle); 1515e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1516e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1517e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1518e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1519e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Sets the policy on a built-in chain. */ 1520e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 152179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_SET_POLICY(const IPT_CHAINLABEL chain, 152279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const IPT_CHAINLABEL policy, 15231cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte STRUCT_COUNTERS *counters, 152479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1525e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1526e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int hook; 15271cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte unsigned int policyoff, ctrindex; 152879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 152979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET *t; 1530e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 153179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_SET_POLICY; 1532e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Figure out which chain. */ 153379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell hook = TC_BUILTIN(chain, *handle); 1534e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (hook == 0) { 1535c8264991454b5e77279830736f80ea3153b6f814Marc Boucher errno = ENOENT; 1536e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1537e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } else 1538e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher hook--; 1539e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1540e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher policyoff = get_chain_end(*handle, (*handle)->info.hook_entry[hook]); 1541e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (policyoff != (*handle)->info.underflow[hook]) { 1542e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("ERROR: Policy for `%s' offset %u != underflow %u\n", 1543e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher chain, policyoff, (*handle)->info.underflow[hook]); 1544e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1545e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1546e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1547e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(*handle, policyoff); 154879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell t = (STRUCT_STANDARD_TARGET *)GET_TARGET(e); 1549e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 155079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strcmp(policy, LABEL_ACCEPT) == 0) 1551e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict = -NF_ACCEPT - 1; 155279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (strcmp(policy, LABEL_DROP) == 0) 1553e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict = -NF_DROP - 1; 1554e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else { 1555e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1556e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1557e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 15581cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 15591cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte ctrindex = entry2index(*handle, e); 15601cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 15611cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte if (counters) { 15621cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte /* set byte and packet counters */ 15631cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte memcpy(&e->counters, counters, sizeof(STRUCT_COUNTERS)); 15641cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 15651cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte (*handle)->counter_map[ctrindex].maptype 15661cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte = COUNTER_MAP_SET; 15671cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 15681cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte } else { 15691cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte (*handle)->counter_map[ctrindex] 15701cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte = ((struct counter_map){ COUNTER_MAP_NOMAP, 0 }); 15711cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte } 15721cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 1573175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell set_changed(*handle); 1574e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1575e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1576e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1577e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1578e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Without this, on gcc 2.7.2.3, we get: 157979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell libiptc.c: In function `TC_COMMIT': 1580e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher libiptc.c:833: fixed or forbidden register was spilled. 1581e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher This may be due to a compiler bug or to impossible asm 1582e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher statements or clauses. 1583e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher*/ 1584e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic void 158579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellsubtract_counters(STRUCT_COUNTERS *answer, 158679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_COUNTERS *a, 158779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_COUNTERS *b) 1588e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1589e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher answer->pcnt = a->pcnt - b->pcnt; 1590e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher answer->bcnt = a->bcnt - b->bcnt; 1591e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1592e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1593e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 159479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_COMMIT(TC_HANDLE_T *handle) 1595e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1596e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Replace, then map back the counters. */ 159779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_REPLACE *repl; 159879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_COUNTERS_INFO *newcounters; 1599e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 1600841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson size_t counterlen; 1601e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1602e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(*handle); 1603841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson 1604841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson counterlen = sizeof(STRUCT_COUNTERS_INFO) 1605841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson + sizeof(STRUCT_COUNTERS) * (*handle)->new_number; 1606841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson 1607e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#if 0 160854c307e0ff401f40a6fe382af4ae5bff0f5b40baRusty Russell TC_DUMP_ENTRIES(*handle); 1609e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#endif 1610e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1611e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Don't commit if nothing changed. */ 1612e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!(*handle)->changed) 1613e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher goto finished; 1614e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1615e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl = malloc(sizeof(*repl) + (*handle)->entries.size); 1616e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!repl) { 1617e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 1618e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1619e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1620e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1621e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* These are the old counters we will get from kernel */ 162279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell repl->counters = malloc(sizeof(STRUCT_COUNTERS) 1623e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * (*handle)->info.num_entries); 1624e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!repl->counters) { 1625e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1626e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 1627e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1628e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 16297e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 1630e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* These are the counters we're going to put back, later. */ 1631e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newcounters = malloc(counterlen); 1632e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!newcounters) { 1633e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl->counters); 1634e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1635e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 1636e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1637e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1638e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1639e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(repl->name, (*handle)->info.name); 1640e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl->num_entries = (*handle)->new_number; 1641e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl->size = (*handle)->entries.size; 1642e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(repl->hook_entry, (*handle)->info.hook_entry, 1643e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(repl->hook_entry)); 1644e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(repl->underflow, (*handle)->info.underflow, 1645e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(repl->underflow)); 1646e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl->num_counters = (*handle)->info.num_entries; 1647e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl->valid_hooks = (*handle)->info.valid_hooks; 1648725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memcpy(repl->entries, (*handle)->entries.entrytable, 1649e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->entries.size); 1650e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 165179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (setsockopt(sockfd, TC_IPPROTO, SO_SET_REPLACE, repl, 1652e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(*repl) + (*handle)->entries.size) < 0) { 1653e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl->counters); 1654e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1655e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(newcounters); 1656e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1657e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1658e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1659e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Put counters back. */ 1660e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(newcounters->name, (*handle)->info.name); 1661e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newcounters->num_counters = (*handle)->new_number; 1662e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (i = 0; i < (*handle)->new_number; i++) { 1663e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int mappos = (*handle)->counter_map[i].mappos; 1664e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher switch ((*handle)->counter_map[i].maptype) { 1665e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher case COUNTER_MAP_NOMAP: 1666e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newcounters->counters[i] 166779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell = ((STRUCT_COUNTERS){ 0, 0 }); 1668e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher break; 1669e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1670e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher case COUNTER_MAP_NORMAL_MAP: 1671e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Original read: X. 1672e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Atomic read on replacement: X + Y. 1673e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Currently in kernel: Z. 1674e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Want in kernel: X + Y + Z. 1675e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * => Add in X + Y 1676e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * => Add in replacement read. 1677e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher */ 1678e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newcounters->counters[i] = repl->counters[mappos]; 1679e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher break; 1680e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1681e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher case COUNTER_MAP_ZEROED: 1682e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Original read: X. 1683e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Atomic read on replacement: X + Y. 1684e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Currently in kernel: Z. 1685e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Want in kernel: Y + Z. 1686e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * => Add in Y. 1687e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * => Add in (replacement read - original read). 1688e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher */ 1689e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher subtract_counters(&newcounters->counters[i], 1690e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher &repl->counters[mappos], 1691e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher &index2entry(*handle, i)->counters); 1692e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher break; 16931cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 16941cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte case COUNTER_MAP_SET: 16951cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte /* Want to set counter (iptables-restore) */ 16961cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 16971cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte memcpy(&newcounters->counters[i], 16981cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte &index2entry(*handle, i)->counters, 16991cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte sizeof(STRUCT_COUNTERS)); 17001cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte 17011cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte break; 1702e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1703e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 170462527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell 170562527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell#ifdef KERNEL_64_USERSPACE_32 170662527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell { 170762527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell /* Kernel will think that pointer should be 64-bits, and get 170862527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell padding. So we accomodate here (assumption: alignment of 170962527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell `counters' is on 64-bit boundary). */ 171062527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell u_int64_t *kernptr = (u_int64_t *)&newcounters->counters; 171162527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell if ((unsigned long)&newcounters->counters % 8 != 0) { 171262527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell fprintf(stderr, 171362527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell "counters alignment incorrect! Mail rusty!\n"); 171462527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell abort(); 171562527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell } 171662527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell *kernptr = newcounters->counters; 171754c307e0ff401f40a6fe382af4ae5bff0f5b40baRusty Russell } 171862527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell#endif /* KERNEL_64_USERSPACE_32 */ 1719e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 172079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (setsockopt(sockfd, TC_IPPROTO, SO_SET_ADD_COUNTERS, 172179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell newcounters, counterlen) < 0) { 1722e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl->counters); 1723e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1724e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(newcounters); 1725e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1726e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1727e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1728e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl->counters); 1729e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1730e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(newcounters); 1731e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1732e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher finished: 1733841e4aed2349046eb2c0b1375139c06569a93bd0Martin Josefsson TC_FREE(handle); 1734e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1735e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1736e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1737e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Get raw socket. */ 1738e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 173979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_GET_RAW_SOCKET() 1740e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1741e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return sockfd; 1742e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1743e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1744e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Translates errno numbers into more human-readable form than strerror. */ 1745e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherconst char * 174679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_STRERROR(int err) 1747e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1748e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 1749e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct table_struct { 1750e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher void *fn; 1751e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int err; 1752e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher const char *message; 1753e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } table [] = 17544ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte { { TC_INIT, EPERM, "Permission denied (you must be root)" }, 175579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_INIT, EINVAL, "Module is wrong version" }, 17564ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte { TC_INIT, ENOENT, 17574ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte "Table does not exist (do you need to insmod?)" }, 175879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_CHAIN, ENOTEMPTY, "Chain is not empty" }, 175979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_CHAIN, EINVAL, "Can't delete built-in chain" }, 176079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_CHAIN, EMLINK, 1761e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher "Can't delete chain with references left" }, 176279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_CREATE_CHAIN, EEXIST, "Chain already exists" }, 176379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_INSERT_ENTRY, E2BIG, "Index of insertion too big" }, 176479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_REPLACE_ENTRY, E2BIG, "Index of replacement too big" }, 176579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_NUM_ENTRY, E2BIG, "Index of deletion too big" }, 17661cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte { TC_READ_COUNTER, E2BIG, "Index of counter too big" }, 17671cef74d943055668b5e356eebea877fdaa1ce3e0Harald Welte { TC_ZERO_COUNTER, E2BIG, "Index of counter too big" }, 176879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_INSERT_ENTRY, ELOOP, "Loop found in table" }, 176979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_INSERT_ENTRY, EINVAL, "Target problem" }, 1770e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* EINVAL for CHECK probably means bad interface. */ 177179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_CHECK_PACKET, EINVAL, 1772c8264991454b5e77279830736f80ea3153b6f814Marc Boucher "Bad arguments (does that interface exist?)" }, 17734ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte { TC_CHECK_PACKET, ENOSYS, 17744ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte "Checking will most likely never get implemented" }, 1775e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* ENOENT for DELETE probably means no matching rule */ 177679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_ENTRY, ENOENT, 1777c8264991454b5e77279830736f80ea3153b6f814Marc Boucher "Bad rule (does a matching rule exist in that chain?)" }, 177879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_SET_POLICY, ENOENT, 1779c8264991454b5e77279830736f80ea3153b6f814Marc Boucher "Bad built-in chain name" }, 178079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_SET_POLICY, EINVAL, 1781c8264991454b5e77279830736f80ea3153b6f814Marc Boucher "Bad policy name" }, 17824ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte 17834ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte { NULL, 0, "Incompatible with this kernel" }, 17844ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte { NULL, ENOPROTOOPT, "iptables who? (do you need to insmod?)" }, 17854ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte { NULL, ENOSYS, "Will be implemented real soon. I promise ;)" }, 17864ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte { NULL, ENOMEM, "Memory allocation problem" }, 17874ccfa630d9a588d4b852abef8bc467642427c8cfHarald Welte { NULL, ENOENT, "No chain/target/match by that name" }, 1788e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher }; 1789e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1790e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (i = 0; i < sizeof(table)/sizeof(struct table_struct); i++) { 1791e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((!table[i].fn || table[i].fn == iptc_fn) 1792e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && table[i].err == err) 1793e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return table[i].message; 1794e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1795e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1796e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return strerror(err); 1797e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1798