libiptc.c revision 3c7a6c479f3eccd65a78dc103f33f4085e8e4703
1e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Library which manipulates firewall rules. Version 0.1. */ 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__ 1979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic STRUCT_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, 45e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher COUNTER_MAP_ZEROED 46e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } maptype; 47e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int mappos; 48e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher}; 49e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 50e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Convenience structures */ 51e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstruct ipt_error_target 52e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 5379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET t; 5479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell char error[TABLE_MAXNAMELEN]; 55e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher}; 56e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 5730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstruct chain_cache 5830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 5979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell char name[TABLE_MAXNAMELEN]; 6030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* This is the first rule in chain. */ 6179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *start; 6230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Last rule in chain */ 6379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *end; 6430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell}; 6530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 6679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellSTRUCT_TC_HANDLE 67e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 68e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Have changes been made? */ 69e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int changed; 70e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Size in here reflects original state. */ 7179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_GETINFO info; 72e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 73e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct counter_map *counter_map; 74e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Array of hook names */ 75e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher const char **hooknames; 76e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 7730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Cached position of chain heads (NULL = no cache). */ 7830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int cache_num_chains; 7930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int cache_num_builtins; 8030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *cache_chain_heads; 8130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 8230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Chain iterator: current chain cache entry. */ 8330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *cache_chain_iteration; 8430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 8530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Rule iterator: terminal rule */ 8679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *cache_rule_end; 87175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell 88e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Number in here reflects current state. */ 89e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int new_number; 9079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_GET_ENTRIES entries; 91e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher}; 92e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 93175f64177743e5a417e98d483ef995bf7151f3bcRusty Russellstatic void 9479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellset_changed(TC_HANDLE_T h) 95175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell{ 9630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (h->cache_chain_heads) { 9730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell free(h->cache_chain_heads); 9830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads = NULL; 9930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains = 0; 10030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_iteration = NULL; 10130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_rule_end = NULL; 10230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } 103175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell h->changed = 1; 104175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell} 105175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell 10630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#ifndef NDEBUG 10779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic void do_check(TC_HANDLE_T h, unsigned int line); 108849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell#define CHECK(h) do { if (!getenv("IPTC_NO_CHECK")) do_check((h), __LINE__); } while(0) 10930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#else 11030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#define CHECK(h) 11130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#endif 112e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 113e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 11479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_number(const STRUCT_ENTRY *i, 11579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *seek, 116e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int *pos) 117e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 118e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (i == seek) 119e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 120e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*pos)++; 121e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 122e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 123e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 124e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic unsigned int 12579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellentry2index(const TC_HANDLE_T h, const STRUCT_ENTRY *seek) 126e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 127e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int pos = 0; 128e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 129725d97a79cf0b332ed45cb7d254915178328427dRusty Russell if (ENTRY_ITERATE(h->entries.entrytable, h->entries.size, 13079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell get_number, seek, &pos) == 0) { 131e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: offset %i not an entry!\n", 132725d97a79cf0b332ed45cb7d254915178328427dRusty Russell (char *)seek - (char *)h->entries.entrytable); 133e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 134e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 135e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return pos; 136e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 137e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 138e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 13979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_entry_n(STRUCT_ENTRY *i, 140e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int number, 141e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int *pos, 14279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY **pe) 143e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 144e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (*pos == number) { 145e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *pe = i; 146e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 147e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 148e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*pos)++; 149e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 150e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 151e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 15279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic STRUCT_ENTRY * 15379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellindex2entry(TC_HANDLE_T h, unsigned int index) 154e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 155e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int pos = 0; 15679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *ret = NULL; 157e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 158725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE(h->entries.entrytable, h->entries.size, 15979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell get_entry_n, index, &pos, &ret); 160e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 161e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 162e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 163e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 16479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic inline STRUCT_ENTRY * 16579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_entry(TC_HANDLE_T h, unsigned int offset) 166e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 167725d97a79cf0b332ed45cb7d254915178328427dRusty Russell return (STRUCT_ENTRY *)((char *)h->entries.entrytable + offset); 168e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 169e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 170e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline unsigned long 17179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellentry2offset(const TC_HANDLE_T h, const STRUCT_ENTRY *e) 172e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 173725d97a79cf0b332ed45cb7d254915178328427dRusty Russell return (char *)e - (char *)h->entries.entrytable; 174e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 175e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 176e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic unsigned long 17779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellindex2offset(TC_HANDLE_T h, unsigned int index) 178e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 179e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return entry2offset(h, index2entry(h, index)); 180e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 181e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 182e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic const char * 18379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_errorlabel(TC_HANDLE_T h, unsigned int offset) 184e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 18579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 186e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 187e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(h, offset); 18867088e73ce7707229c56987868f112051defca5aRusty Russell if (strcmp(GET_TARGET(e)->u.user.name, ERROR_TARGET) != 0) { 189e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: offset %u not an error node!\n", 190e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset); 191e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 192e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 193e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 19479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return (const char *)GET_TARGET(e)->data; 195e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 196e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 197e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Allocate handle of given size */ 19879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic TC_HANDLE_T 199e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucheralloc_handle(const char *tablename, unsigned int size, unsigned int num_rules) 200e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 201e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher size_t len; 20279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T h; 203e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 20479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell len = sizeof(STRUCT_TC_HANDLE) 205e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher + size 206e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher + num_rules * sizeof(struct counter_map); 207e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 208e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((h = malloc(len)) == NULL) { 209e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 210e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 211e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 212e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 213e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->changed = 0; 21430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains = 0; 21530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads = NULL; 216e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->counter_map = (void *)h 21779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell + sizeof(STRUCT_TC_HANDLE) 218e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher + size; 219e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(h->info.name, tablename); 220e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(h->entries.name, tablename); 221e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 222e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return h; 223e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 224e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 22579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_HANDLE_T 22679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_INIT(const char *tablename) 227e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 22879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T h; 22979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_GETINFO info; 230e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 231e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int tmp; 232e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher socklen_t s; 233e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 23479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_INIT; 235e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 23679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell sockfd = socket(TC_AF, SOCK_RAW, IPPROTO_RAW); 237e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (sockfd < 0) 238e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 239e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 240e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher s = sizeof(info); 24179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strlen(tablename) >= TABLE_MAXNAMELEN) { 242e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 243e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 244e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 245e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(info.name, tablename); 24679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (getsockopt(sockfd, TC_IPPROTO, SO_GET_INFO, &info, &s) < 0) 247e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 248e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 249e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((h = alloc_handle(info.name, info.size, info.num_entries)) 250e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher == NULL) 251e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 252e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 253e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Too hard --RR */ 254e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#if 0 255e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sprintf(pathname, "%s/%s", IPT_LIB_DIR, info.name); 256e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher dynlib = dlopen(pathname, RTLD_NOW); 257e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!dynlib) { 258e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 259e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 260e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 261e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->hooknames = dlsym(dynlib, "hooknames"); 262e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!h->hooknames) { 263e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 264e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 265e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 266e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#else 267e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->hooknames = hooknames; 268e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#endif 269e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 270e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Initialize current state */ 271e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->info = info; 272e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->new_number = h->info.num_entries; 273e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (i = 0; i < h->info.num_entries; i++) 274e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->counter_map[i] 275e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher = ((struct counter_map){COUNTER_MAP_NORMAL_MAP, i}); 276e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 277e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher h->entries.size = h->info.size; 278e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 27979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell tmp = sizeof(STRUCT_GET_ENTRIES) + h->info.size; 280e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 28179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (getsockopt(sockfd, TC_IPPROTO, SO_GET_ENTRIES, &h->entries, 282e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher &tmp) < 0) { 283e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(h); 284e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 285e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 2867e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 287e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(h); 288e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return h; 289e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 290e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 291e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 29279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellprint_match(const STRUCT_ENTRY_MATCH *m) 293e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 294228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell printf("Match name: `%s'\n", m->u.user.name); 295e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 296e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 297e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 29879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic int dump_entry(STRUCT_ENTRY *e, const TC_HANDLE_T handle); 29979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell 300e6869a8f59d779ff4d5a0984c86d80db7078496Marc Bouchervoid 30179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_DUMP_ENTRIES(const TC_HANDLE_T handle) 302e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 303e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(handle); 304e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 305e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("libiptc v%s. %u entries, %u bytes.\n", 306e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher NETFILTER_VERSION, 307e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher handle->new_number, handle->entries.size); 308e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("Table `%s'\n", handle->info.name); 309e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("Hooks: pre/in/fwd/out/post = %u/%u/%u/%u/%u\n", 31067088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_PRE_ROUTING], 31167088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_LOCAL_IN], 31267088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_FORWARD], 31367088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_LOCAL_OUT], 31467088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.hook_entry[HOOK_POST_ROUTING]); 315e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("Underflows: pre/in/fwd/out/post = %u/%u/%u/%u/%u\n", 31667088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_PRE_ROUTING], 31767088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_LOCAL_IN], 31867088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_FORWARD], 31967088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_LOCAL_OUT], 32067088e73ce7707229c56987868f112051defca5aRusty Russell handle->info.underflow[HOOK_POST_ROUTING]); 321e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 322725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE(handle->entries.entrytable, handle->entries.size, 32379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell dump_entry, handle); 324e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 325e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 32630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Returns 0 if not hook entry, else hooknumber + 1 */ 32730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstatic inline unsigned int 32879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellis_hook_entry(STRUCT_ENTRY *e, TC_HANDLE_T h) 32930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 33030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int i; 33130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 33279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 33330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((h->info.valid_hooks & (1 << i)) 33430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell && get_entry(h, h->info.hook_entry[i]) == e) 33530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return i+1; 33630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } 33730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return 0; 33830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 33930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 340e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 34179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russelladd_chain(STRUCT_ENTRY *e, TC_HANDLE_T h, STRUCT_ENTRY **prev) 342e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 34330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int builtin; 344e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 34530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Last entry. End it. */ 34630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (entry2offset(h, e) + e->next_offset == h->entries.size) { 34730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* This is the ERROR node at end of the table */ 34830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains-1].end = *prev; 34930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return 0; 35030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } 351e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 35230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* We know this is the start of a new chain if it's an ERROR 35330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell target, or a hook entry point */ 35467088e73ce7707229c56987868f112051defca5aRusty Russell if (strcmp(GET_TARGET(e)->u.user.name, ERROR_TARGET) == 0) { 35530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* prev was last entry in previous chain */ 35630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains-1].end 35730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = *prev; 35830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 35930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell strcpy(h->cache_chain_heads[h->cache_num_chains].name, 36079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell (const char *)GET_TARGET(e)->data); 36130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains].start 36230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = (void *)e + e->next_offset; 36330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains++; 36430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } else if ((builtin = is_hook_entry(e, h)) != 0) { 36530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (h->cache_num_chains > 0) 36630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* prev was last entry in previous chain */ 36730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains-1].end 36830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = *prev; 36930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 37030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell strcpy(h->cache_chain_heads[h->cache_num_chains].name, 37130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->hooknames[builtin-1]); 37230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads[h->cache_num_chains].start 37330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = (void *)e; 37430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains++; 37530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell } 37630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 37730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell *prev = e; 378e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 379e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 380e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 38130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstatic int alphasort(const void *a, const void *b) 38230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 38330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return strcmp(((struct chain_cache *)a)->name, 38430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell ((struct chain_cache *)b)->name); 38530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 38630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 38779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic int populate_cache(TC_HANDLE_T h) 388e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 389e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 39079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *prev; 391e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 39230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* # chains < # rules / 2 + num builtins - 1 */ 39330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_chain_heads = malloc((h->new_number / 2 + 4) 39430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell * sizeof(struct chain_cache)); 39530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!h->cache_chain_heads) { 39630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell errno = ENOMEM; 39730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return 0; 398175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell } 399175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell 40030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains = 0; 40130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_builtins = 0; 40230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 40330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Count builtins */ 40479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 40530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (h->info.valid_hooks & (1 << i)) 40630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_builtins++; 407e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 408e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 40930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell prev = NULL; 410725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE(h->entries.entrytable, h->entries.size, 41179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell add_chain, h, &prev); 41230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 41330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell qsort(h->cache_chain_heads + h->cache_num_builtins, 41430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell h->cache_num_chains - h->cache_num_builtins, 41530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell sizeof(struct chain_cache), alphasort); 41630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 41730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return 1; 41830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 41930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 42030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Returns cache ptr if found, otherwise NULL. */ 42130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstatic struct chain_cache * 42279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellfind_label(const char *name, TC_HANDLE_T handle) 42330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 424849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell unsigned int i; 42530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 42630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (handle->cache_chain_heads == NULL 42730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell && !populate_cache(handle)) 42830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 42930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 430849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell /* FIXME: Linear search through builtins, then binary --RR */ 431849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell for (i = 0; i < handle->cache_num_chains; i++) { 432849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell if (strcmp(handle->cache_chain_heads[i].name, name) == 0) 433849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell return &handle->cache_chain_heads[i]; 434e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 435e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 436849779c4adf8dd65c83fffb65e6b7898df2a55c6Rusty Russell return NULL; 437e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 438e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 439e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Does this chain exist? */ 44079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellint TC_IS_CHAIN(const char *chain, const TC_HANDLE_T handle) 441e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 44230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return find_label(chain, handle) != NULL; 443e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 444e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 445e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Returns the position of the final (ie. unconditional) element. */ 446e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic unsigned int 44779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellget_chain_end(const TC_HANDLE_T handle, unsigned int start) 448e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 449e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int last_off, off; 45079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 451e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 452e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher last_off = start; 453e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(handle, start); 454e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 455e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Terminate when we meet a error label or a hook entry. */ 456e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (off = start + e->next_offset; 457e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher off < handle->entries.size; 458e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher last_off = off, off += e->next_offset) { 45979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET *t; 460e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 461e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 462e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(handle, off); 463e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 464e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* We hit an entry point. */ 46579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 466e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((handle->info.valid_hooks & (1 << i)) 467e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && off == handle->info.hook_entry[i]) 468e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return last_off; 469e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 470e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 471e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* We hit a user chain label */ 47279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell t = GET_TARGET(e); 47367088e73ce7707229c56987868f112051defca5aRusty Russell if (strcmp(t->u.user.name, ERROR_TARGET) == 0) 474e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return last_off; 475e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 476e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* SHOULD NEVER HAPPEN */ 477e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: Off end (%u) of chain from %u!\n", 478e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher handle->entries.size, off); 479e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 480e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 481e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 48230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Iterator functions to run through the chains. */ 483e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherconst char * 4848c700900e2a0cf87d7917cb62578583a60ad1210Philip BlundellTC_FIRST_CHAIN(TC_HANDLE_T *handle) 485e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 48630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((*handle)->cache_chain_heads == NULL 48730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell && !populate_cache(*handle)) 488e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 489e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 49030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell (*handle)->cache_chain_iteration 49130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell = &(*handle)->cache_chain_heads[0]; 49230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 49330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return (*handle)->cache_chain_iteration->name; 49430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 49530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 49630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Iterator functions to run through the chains. Returns NULL at end. */ 49730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellconst char * 49879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_NEXT_CHAIN(TC_HANDLE_T *handle) 49930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 50030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell (*handle)->cache_chain_iteration++; 50130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 50230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((*handle)->cache_chain_iteration - (*handle)->cache_chain_heads 50330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell == (*handle)->cache_num_chains) 50430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 50530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 50630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return (*handle)->cache_chain_iteration->name; 50730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 50830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 50930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Get first rule in the given chain: NULL for empty chain. */ 51079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellconst STRUCT_ENTRY * 5118c700900e2a0cf87d7917cb62578583a60ad1210Philip BlundellTC_FIRST_RULE(const char *chain, TC_HANDLE_T *handle) 51230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 51330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 51430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 51530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell c = find_label(chain, *handle); 51630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!c) { 51730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell errno = ENOENT; 51830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 519e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 520e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 52130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* Empty chain: single return/policy rule */ 52230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (c->start == c->end) 52330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 52430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 52530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell (*handle)->cache_rule_end = c->end; 52630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return c->start; 527e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 528e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 52930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell/* Returns NULL when rules run out. */ 53079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellconst STRUCT_ENTRY * 5318c700900e2a0cf87d7917cb62578583a60ad1210Philip BlundellTC_NEXT_RULE(const STRUCT_ENTRY *prev, TC_HANDLE_T *handle) 53230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell{ 53330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((void *)prev + prev->next_offset 53430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell == (void *)(*handle)->cache_rule_end) 53530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return NULL; 53630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 53730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return (void *)prev + prev->next_offset; 53830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell} 53930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 54030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#if 0 541e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* How many rules in this chain? */ 542e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherunsigned int 54379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_NUM_RULES(const char *chain, TC_HANDLE_T *handle) 544e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 545e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int off = 0; 54679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *start, *end; 547e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 548e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(*handle); 549e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!find_label(&off, chain, *handle)) { 550e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 551e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return (unsigned int)-1; 552e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 553e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 554e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher start = get_entry(*handle, off); 555e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher end = get_entry(*handle, get_chain_end(*handle, off)); 556e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 557e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return entry2index(*handle, end) - entry2index(*handle, start); 558e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 559e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 560e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Get n'th rule in this chain. */ 56179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellconst STRUCT_ENTRY *TC_GET_RULE(const char *chain, 56279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned int n, 56379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 564e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 565e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int pos = 0, chainindex; 566e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 567e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(*handle); 568e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!find_label(&pos, chain, *handle)) { 569e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 570e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 571e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 572e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 573e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher chainindex = entry2index(*handle, get_entry(*handle, pos)); 574e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 575e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return index2entry(*handle, chainindex + n); 576e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 57730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell#endif 578e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 57930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russellstatic const char * 58079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russelltarget_name(TC_HANDLE_T handle, const STRUCT_ENTRY *ce) 581e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 582e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int spos; 583e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int labelidx; 58479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *jumpto; 585e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 58630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell /* To avoid const warnings */ 58779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e = (STRUCT_ENTRY *)ce; 58830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell 58979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strcmp(GET_TARGET(e)->u.user.name, STANDARD_TARGET) != 0) 59079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return GET_TARGET(e)->u.user.name; 591e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 592e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Standard target: evaluate */ 59379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell spos = *(int *)GET_TARGET(e)->data; 594e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (spos < 0) { 59579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (spos == RETURN) 59679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return LABEL_RETURN; 597e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else if (spos == -NF_ACCEPT-1) 59879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return LABEL_ACCEPT; 599e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else if (spos == -NF_DROP-1) 60079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return LABEL_DROP; 6012f4e5d92c73906e0dc2ae42fee5c05740528e92bJames Morris else if (spos == -NF_QUEUE-1) 60267088e73ce7707229c56987868f112051defca5aRusty Russell return LABEL_QUEUE; 603e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 604e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: off %lu/%u not a valid target (%i)\n", 605e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher entry2offset(handle, e), handle->entries.size, 606e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher spos); 607e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 608e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 609e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 610e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher jumpto = get_entry(handle, spos); 611e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 612e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Fall through rule */ 613e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (jumpto == (void *)e + e->next_offset) 614e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ""; 615e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 616e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Must point to head of a chain: ie. after error rule */ 617e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher labelidx = entry2index(handle, jumpto) - 1; 618e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return get_errorlabel(handle, index2offset(handle, labelidx)); 619e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 620e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 621e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Returns a pointer to the target name of this position. */ 62279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellconst char *TC_GET_TARGET(const STRUCT_ENTRY *e, 62379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 624e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 625e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return target_name(*handle, e); 626e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 627e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 628e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Is this a built-in chain? Actually returns hook + 1. */ 629e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 63079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_BUILTIN(const char *chain, const TC_HANDLE_T handle) 631e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 632e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 633e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 63479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 635e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((handle->info.valid_hooks & (1 << i)) 636e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && handle->hooknames[i] 637e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && strcmp(handle->hooknames[i], chain) == 0) 638e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return i+1; 639e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 640e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 641e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 642e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 643e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Get the policy of a given built-in chain */ 644e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherconst char * 64579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_GET_POLICY(const char *chain, 64679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_COUNTERS *counters, 64779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 648e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 649e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int start; 65079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 651e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int hook; 652e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 65379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell hook = TC_BUILTIN(chain, *handle); 654e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (hook != 0) 655e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher start = (*handle)->info.hook_entry[hook-1]; 656e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else 657e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 658e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 659e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(*handle, get_chain_end(*handle, start)); 660e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *counters = e->counters; 661e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 662e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return target_name(*handle, e); 663e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 664e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 665e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 66679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellcorrect_verdict(STRUCT_ENTRY *e, 667725d97a79cf0b332ed45cb7d254915178328427dRusty Russell char *base, 668e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int offset, int delta_offset) 669e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 67079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET *t = (void *)GET_TARGET(e); 671725d97a79cf0b332ed45cb7d254915178328427dRusty Russell unsigned int curr = (char *)e - base; 672e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 673e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Trap: insert of fall-through rule. Don't change fall-through 674e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher verdict to jump-over-next-rule. */ 67579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strcmp(t->target.u.user.name, STANDARD_TARGET) == 0 676e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && t->verdict > (int)offset 677e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && !(curr == offset && 678e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict == curr + e->next_offset)) { 679e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict += delta_offset; 680e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 681e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 682e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 683e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 684e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 685e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Adjusts standard verdict jump positions after an insertion/deletion. */ 686e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 68779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellset_verdict(unsigned int offset, int delta_offset, TC_HANDLE_T *handle) 688e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 689725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE((*handle)->entries.entrytable, 69079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell (*handle)->entries.size, 691725d97a79cf0b332ed45cb7d254915178328427dRusty Russell correct_verdict, (char *)(*handle)->entries.entrytable, 69279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell offset, delta_offset); 693e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 694175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell set_changed(*handle); 695e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 696e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 697e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 698e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* If prepend is set, then we are prepending to a chain: if the 699e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * insertion position is an entry point, keep the entry point. */ 700e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 701e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherinsert_rules(unsigned int num_rules, unsigned int rules_size, 70279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *insert, 703e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int offset, unsigned int num_rules_offset, 704e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int prepend, 70579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 706e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 70779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T newh; 70879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_GETINFO newinfo; 709e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 710e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 711e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (offset >= (*handle)->entries.size) { 712e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 713e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 714e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 715e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 716e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newinfo = (*handle)->info; 717e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 718e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Fix up entry points. */ 71979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 720e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Entry points to START of chain, so keep same if 721e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher inserting on at that point. */ 722e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->info.hook_entry[i] > offset) 723e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newinfo.hook_entry[i] += rules_size; 724e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 725e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Underflow always points to END of chain (policy), 726e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher so if something is inserted at same point, it 727e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher should be advanced. */ 728e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->info.underflow[i] >= offset) 729e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newinfo.underflow[i] += rules_size; 730e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 731e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 732e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh = alloc_handle((*handle)->info.name, 7333c7a6c479f3eccd65a78dc103f33f4085e8e4703Rusty Russell (*handle)->entries.size + rules_size, 734e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->info.num_entries + num_rules); 735e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!newh) 736e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 737e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->info = newinfo; 738e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 739e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Copy pre... */ 740725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memcpy(newh->entries.entrytable, (*handle)->entries.entrytable,offset); 741e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* ... Insert new ... */ 742725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memcpy((char *)newh->entries.entrytable + offset, insert, rules_size); 743e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* ... copy post */ 744725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memcpy((char *)newh->entries.entrytable + offset + rules_size, 745725d97a79cf0b332ed45cb7d254915178328427dRusty Russell (char *)(*handle)->entries.entrytable + offset, 746e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->entries.size - offset); 747e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 748e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Move counter map. */ 749e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Copy pre... */ 750e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(newh->counter_map, (*handle)->counter_map, 751e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(struct counter_map) * num_rules_offset); 752e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* ... copy post */ 753e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(newh->counter_map + num_rules_offset + num_rules, 754e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->counter_map + num_rules_offset, 755e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(struct counter_map) * ((*handle)->new_number 756e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher - num_rules_offset)); 757e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Set intermediates to no counter copy */ 758e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (i = 0; i < num_rules; i++) 759e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->counter_map[num_rules_offset+i] 760e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher = ((struct counter_map){ COUNTER_MAP_NOMAP, 0 }); 761e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 762e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->new_number = (*handle)->new_number + num_rules; 763e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->entries.size = (*handle)->entries.size + rules_size; 764e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newh->hooknames = (*handle)->hooknames; 765e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 76630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((*handle)->cache_chain_heads) 76730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell free((*handle)->cache_chain_heads); 768e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(*handle); 769e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *handle = newh; 770e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 771e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return set_verdict(offset, rules_size, handle); 772e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 773e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 774e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 775e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherdelete_rules(unsigned int num_rules, unsigned int rules_size, 776e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int offset, unsigned int num_rules_offset, 77779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 778e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 779e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 780e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 781e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (offset + rules_size > (*handle)->entries.size) { 782e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 783e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 784e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 785e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 786e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Fix up entry points. */ 78779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell for (i = 0; i < NUMHOOKS; i++) { 788e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* In practice, we never delete up to a hook entry, 789e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher since the built-in chains are always first, 790e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher so these two are never equal */ 791e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->info.hook_entry[i] >= offset + rules_size) 792e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->info.hook_entry[i] -= rules_size; 793e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else if ((*handle)->info.hook_entry[i] > offset) { 794e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: Deleting entry %u %u %u\n", 795e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher i, (*handle)->info.hook_entry[i], offset); 796e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 797e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 798e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 799e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Underflow points to policy (terminal) rule in 800e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher built-in, so sequality is valid here (when deleting 801e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher the last rule). */ 802e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->info.underflow[i] >= offset + rules_size) 803e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->info.underflow[i] -= rules_size; 804e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else if ((*handle)->info.underflow[i] > offset) { 805e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fprintf(stderr, "ERROR: Deleting uflow %u %u %u\n", 806e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher i, (*handle)->info.underflow[i], offset); 807e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher abort(); 808e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 809e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 810e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 811e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Move the rules down. */ 812725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memmove((char *)(*handle)->entries.entrytable + offset, 813725d97a79cf0b332ed45cb7d254915178328427dRusty Russell (char *)(*handle)->entries.entrytable + offset + rules_size, 814e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->entries.size - (offset + rules_size)); 815e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 816e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Move the counter map down. */ 817e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memmove(&(*handle)->counter_map[num_rules_offset], 818e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher &(*handle)->counter_map[num_rules_offset + num_rules], 819e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(struct counter_map) 820e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * ((*handle)->new_number - (num_rules + num_rules_offset))); 821e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 822e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Fix numbers */ 823e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->new_number -= num_rules; 824e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->entries.size -= rules_size; 825e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 826e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return set_verdict(offset, -(int)rules_size, handle); 827e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 828e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 829e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 83079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstandard_map(STRUCT_ENTRY *e, int verdict) 831e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 83279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET *t; 833e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 83479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell t = (STRUCT_STANDARD_TARGET *)GET_TARGET(e); 835e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 83667088e73ce7707229c56987868f112051defca5aRusty Russell if (t->target.u.target_size 8378c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell != ALIGN(sizeof(STRUCT_STANDARD_TARGET))) { 838e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 839e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 840e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 841e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* memset for memcmp convenience on delete/replace */ 84279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell memset(t->target.u.user.name, 0, FUNCTION_MAXNAMELEN); 84379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell strcpy(t->target.u.user.name, STANDARD_TARGET); 844e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict = verdict; 845e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 846e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 847e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 8487e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 849e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 85079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellmap_target(const TC_HANDLE_T handle, 85179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e, 852e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int offset, 85379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET *old) 854e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 85579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET *t = GET_TARGET(e); 856e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 857e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Save old target (except data, which we don't change, except for 858e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher standard case, where we don't care). */ 859e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *old = *t; 860e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 861e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Maybe it's empty (=> fall through) */ 862228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell if (strcmp(t->u.user.name, "") == 0) 863e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return standard_map(e, offset + e->next_offset); 864e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Maybe it's a standard target name... */ 86579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (strcmp(t->u.user.name, LABEL_ACCEPT) == 0) 866e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return standard_map(e, -NF_ACCEPT - 1); 86779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (strcmp(t->u.user.name, LABEL_DROP) == 0) 868e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return standard_map(e, -NF_DROP - 1); 86967088e73ce7707229c56987868f112051defca5aRusty Russell else if (strcmp(t->u.user.name, LABEL_QUEUE) == 0) 870e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return standard_map(e, -NF_QUEUE - 1); 87179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (strcmp(t->u.user.name, LABEL_RETURN) == 0) 87279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell return standard_map(e, RETURN); 87379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (TC_BUILTIN(t->u.user.name, handle)) { 874e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Can't jump to builtins. */ 875e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 876e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 877e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } else { 878e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Maybe it's an existing chain name. */ 87930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 880e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 881228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell c = find_label(t->u.user.name, handle); 88230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (c) 88330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell return standard_map(e, entry2offset(handle, c->start)); 884e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 885e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 886e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Must be a module? If not, kernel will reject... */ 887e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* memset to all 0 for your memcmp convenience. */ 888228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell memset(t->u.user.name + strlen(t->u.user.name), 889e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 0, 89079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell FUNCTION_MAXNAMELEN - strlen(t->u.user.name)); 891e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 892e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 893e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 894e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic void 89579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellunmap_target(STRUCT_ENTRY *e, STRUCT_ENTRY_TARGET *old) 896e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 89779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET *t = GET_TARGET(e); 898e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 899e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Save old target (except data, which we don't change, except for 900e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher standard case, where we don't care). */ 901e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *t = *old; 902e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 903e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 904e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Insert the entry `fw' in chain `chain' into position `rulenum'. */ 905e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 90679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_INSERT_ENTRY(const IPT_CHAINLABEL chain, 90779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *e, 90879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned int rulenum, 90979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 910e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 91130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int chainindex, offset; 91279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET old; 91330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 91414a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell STRUCT_ENTRY *tmp; 915e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 916e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 91779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_INSERT_ENTRY; 91830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 919e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 920e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 921e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 922e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 92330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell chainindex = entry2index(*handle, c->start); 924e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 92514a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell tmp = index2entry(*handle, chainindex + rulenum); 92614a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell if (!tmp || tmp > c->end) { 927e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = E2BIG; 928e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 929e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 930e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset = index2offset(*handle, chainindex + rulenum); 931e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 932e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Mapping target actually alters entry, but that's 933e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher transparent to the caller. */ 93479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (!map_target(*handle, (STRUCT_ENTRY *)e, offset, &old)) 935e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 936e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 937e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = insert_rules(1, e->next_offset, e, offset, 938e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher chainindex + rulenum, rulenum == 0, handle); 93979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unmap_target((STRUCT_ENTRY *)e, &old); 940e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 941e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 942e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 943e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Atomically replace rule `rulenum' in `chain' with `fw'. */ 944e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 94579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_REPLACE_ENTRY(const IPT_CHAINLABEL chain, 94679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *e, 94779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned int rulenum, 94879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 949e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 95030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int chainindex, offset; 95179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET old; 95230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 95314a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell STRUCT_ENTRY *tmp; 954e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 955e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 95679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_REPLACE_ENTRY; 957e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 95830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 959e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 960e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 961e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 962e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 96330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell chainindex = entry2index(*handle, c->start); 964e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 96514a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell tmp = index2entry(*handle, chainindex + rulenum); 96614a1c9175257f73e936a68ba68d3541278c0e52aRusty Russell if (!tmp || tmp >= c->end) { 967e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = E2BIG; 968e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 969e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 970e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 971e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset = index2offset(*handle, chainindex + rulenum); 972e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Replace = delete and insert. */ 973e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!delete_rules(1, get_entry(*handle, offset)->next_offset, 974e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset, chainindex + rulenum, handle)) 975e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 976e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 97779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (!map_target(*handle, (STRUCT_ENTRY *)e, offset, &old)) 978e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 979e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 980e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = insert_rules(1, e->next_offset, e, offset, 981e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher chainindex + rulenum, 1, handle); 98279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unmap_target((STRUCT_ENTRY *)e, &old); 983e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 984e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 985e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 986e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Append entry `fw' to chain `chain'. Equivalent to insert with 987e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher rulenum = length of chain. */ 988e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 98979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_APPEND_ENTRY(const IPT_CHAINLABEL chain, 99079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *e, 99179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 992e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 99330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 99479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET old; 995e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 996e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 99779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_APPEND_ENTRY; 99830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 999e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1000e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1001e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1002e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 100379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (!map_target(*handle, (STRUCT_ENTRY *)e, 100430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell entry2offset(*handle, c->end), &old)) 1005e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1006e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 100730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell ret = insert_rules(1, e->next_offset, e, 100830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell entry2offset(*handle, c->end), 100930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell entry2index(*handle, c->end), 1010e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 0, handle); 101179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unmap_target((STRUCT_ENTRY *)e, &old); 1012e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1013e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1014e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1015e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic inline int 101679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellmatch_different(const STRUCT_ENTRY_MATCH *a, 1017edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell const unsigned char *a_elems, 1018edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell const unsigned char *b_elems, 1019edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell unsigned char **maskptr) 1020e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 102179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY_MATCH *b; 1022edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell unsigned int i; 1023e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1024e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Offset of b is the same as a. */ 102530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell b = (void *)b_elems + ((unsigned char *)a - a_elems); 1026e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1027228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell if (a->u.match_size != b->u.match_size) 1028e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1029e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1030228e98dd6303af11925235af4cf3c3ec450f3f41Rusty Russell if (strcmp(a->u.user.name, b->u.user.name) != 0) 1031e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1032e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 103373ef09b21573ddb17ff75e5fd06fd4b52ec8ea40Rusty Russell *maskptr += ALIGN(sizeof(*a)); 1034edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell 103573ef09b21573ddb17ff75e5fd06fd4b52ec8ea40Rusty Russell for (i = 0; i < a->u.match_size - ALIGN(sizeof(*a)); i++) 1036edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell if (((a->data[i] ^ b->data[i]) & (*maskptr)[i]) != 0) 1037edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell return 1; 1038edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell *maskptr += i; 1039edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell return 0; 1040edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell} 1041edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell 1042edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russellstatic inline int 1043edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russelltarget_different(const unsigned char *a_targdata, 1044edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell const unsigned char *b_targdata, 1045edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell unsigned int tdatasize, 1046edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell const unsigned char *mask) 1047edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell{ 1048edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell unsigned int i; 1049edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell for (i = 0; i < tdatasize; i++) 1050edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell if (((a_targdata[i] ^ b_targdata[i]) & mask[i]) != 0) 105190e712a00913fe2a2f885142439c392392dc08a8Rusty Russell return 1; 1052e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1053e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1054e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1055e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 105679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellstatic int 105779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellis_same(const STRUCT_ENTRY *a, 105879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *b, 105979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned char *matchmask); 1060e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1061e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Delete the first rule in `chain' which matches `fw'. */ 1062e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 106379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_DELETE_ENTRY(const IPT_CHAINLABEL chain, 106479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_ENTRY *origfw, 106579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned char *matchmask, 106679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1067e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 106830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int offset; 106930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 107079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e, *fw; 1071e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 107279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_DELETE_ENTRY; 107330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1074e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1075e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1076e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1077e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1078e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher fw = malloc(origfw->next_offset); 1079e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (fw == NULL) { 1080e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 1081e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1082e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1083e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 108430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell for (offset = entry2offset(*handle, c->start); 108530fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell offset < entry2offset(*handle, c->end); 108630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell offset += e->next_offset) { 108779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY_TARGET discard; 1088e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1089e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(fw, origfw, origfw->next_offset); 1090e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1091e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* FIXME: handle this in is_same --RR */ 1092e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!map_target(*handle, fw, offset, &discard)) { 1093e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(fw); 1094e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1095e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1096e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(*handle, offset); 1097e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1098e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#if 0 1099e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("Deleting:\n"); 1100e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher dump_entry(newe); 1101e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#endif 1102edf14cf4b5edb148d7473f067d95e7bd1316900bRusty Russell if (is_same(e, fw, matchmask)) { 1103e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 1104e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = delete_rules(1, e->next_offset, 1105e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher offset, entry2index(*handle, e), 1106e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher handle); 1107e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(fw); 1108e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1109e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1110e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1111e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1112e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(fw); 1113e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1114e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 11157e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell} 1116e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1117e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Delete the rule in position `rulenum' in `chain'. */ 1118e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 111979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_DELETE_NUM_ENTRY(const IPT_CHAINLABEL chain, 112079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell unsigned int rulenum, 112179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1122e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1123e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int index; 1124e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 112579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 112630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1127e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 112879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_DELETE_NUM_ENTRY; 112930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1130e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1131e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1132e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1133e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 113430fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell index = entry2index(*handle, c->start) + rulenum; 1135e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 113630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (index >= entry2index(*handle, c->end)) { 1137e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = E2BIG; 1138e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1139e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1140e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1141e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = index2entry(*handle, index); 1142e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (e == NULL) { 1143e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1144e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1145e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1146e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1147e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = delete_rules(1, e->next_offset, entry2offset(*handle, e), 1148e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher index, handle); 1149e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1150e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1151e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1152e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Check the packet `fw' on chain `chain'. Returns the verdict, or 1153e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher NULL and sets errno. */ 1154e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherconst char * 115579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_CHECK_PACKET(const IPT_CHAINLABEL chain, 115679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *entry, 115779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1158e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1159e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOSYS; 1160e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return NULL; 1161e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1162e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1163e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Flushes the entries in the given chain (ie. empties chain). */ 1164e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 116579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_FLUSH_ENTRIES(const IPT_CHAINLABEL chain, TC_HANDLE_T *handle) 1166e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 116730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int startindex, endindex; 116830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1169e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 1170e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 117179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_FLUSH_ENTRIES; 117230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1173e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1174e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1175e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 117630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell startindex = entry2index(*handle, c->start); 117730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell endindex = entry2index(*handle, c->end); 1178e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1179e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = delete_rules(endindex - startindex, 118030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell (char *)c->end - (char *)c->start, 118130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell entry2offset(*handle, c->start), startindex, 1182e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher handle); 1183e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1184e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1185e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1186e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Zeroes the counters in a chain. */ 1187e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 118879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_ZERO_ENTRIES(const IPT_CHAINLABEL chain, TC_HANDLE_T *handle) 1189e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1190e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i, end; 119130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 11927e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 119330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1194e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1195e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1196e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1197e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 119830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell i = entry2index(*handle, c->start); 119930fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell end = entry2index(*handle, c->end); 1200e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1201e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (; i <= end; i++) { 1202e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((*handle)->counter_map[i].maptype ==COUNTER_MAP_NORMAL_MAP) 1203e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->counter_map[i].maptype = COUNTER_MAP_ZEROED; 1204e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1205175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell set_changed(*handle); 1206e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1207e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1208e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1209e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1210e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Creates a new chain. */ 1211e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* To create a chain, create two rules: error node and unconditional 1212e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * return. */ 1213e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 121479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_CREATE_CHAIN(const IPT_CHAINLABEL chain, TC_HANDLE_T *handle) 1215e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1216e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 1217e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct { 121879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY head; 1219e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct ipt_error_target name; 122079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY ret; 122179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET target; 1222e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } newc; 1223e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 122479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_CREATE_CHAIN; 1225e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1226e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* find_label doesn't cover built-in targets: DROP, ACCEPT, 1227e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher QUEUE, RETURN. */ 122830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (find_label(chain, *handle) 122979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(chain, LABEL_DROP) == 0 123079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(chain, LABEL_ACCEPT) == 0 123167088e73ce7707229c56987868f112051defca5aRusty Russell || strcmp(chain, LABEL_QUEUE) == 0 123279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(chain, LABEL_RETURN) == 0) { 1233e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EEXIST; 1234e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1235e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1236e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 123779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strlen(chain)+1 > sizeof(IPT_CHAINLABEL)) { 1238e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1239e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1240e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1241e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1242e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memset(&newc, 0, sizeof(newc)); 124379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell newc.head.target_offset = sizeof(STRUCT_ENTRY); 1244e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newc.head.next_offset 124567088e73ce7707229c56987868f112051defca5aRusty Russell = sizeof(STRUCT_ENTRY) 12468c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell + ALIGN(sizeof(struct ipt_error_target)); 124767088e73ce7707229c56987868f112051defca5aRusty Russell strcpy(newc.name.t.u.user.name, ERROR_TARGET); 12488c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell newc.name.t.u.target_size = ALIGN(sizeof(struct ipt_error_target)); 1249e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(newc.name.error, chain); 1250e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 125179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell newc.ret.target_offset = sizeof(STRUCT_ENTRY); 1252e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newc.ret.next_offset 125367088e73ce7707229c56987868f112051defca5aRusty Russell = sizeof(STRUCT_ENTRY) 12548c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell + ALIGN(sizeof(STRUCT_STANDARD_TARGET)); 125579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell strcpy(newc.target.target.u.user.name, STANDARD_TARGET); 125667088e73ce7707229c56987868f112051defca5aRusty Russell newc.target.target.u.target_size 12578c700900e2a0cf87d7917cb62578583a60ad1210Philip Blundell = ALIGN(sizeof(STRUCT_STANDARD_TARGET)); 125879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell newc.target.verdict = RETURN; 1259e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1260e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Add just before terminal entry */ 1261e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = insert_rules(2, sizeof(newc), &newc.head, 1262e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher index2offset(*handle, (*handle)->new_number - 1), 1263e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->new_number - 1, 1264e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 0, handle); 1265e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1266e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1267e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1268e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic int 126979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellcount_ref(STRUCT_ENTRY *e, unsigned int offset, unsigned int *ref) 1270e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 127179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET *t; 1272e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 127379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strcmp(GET_TARGET(e)->u.user.name, STANDARD_TARGET) == 0) { 127479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell t = (STRUCT_STANDARD_TARGET *)GET_TARGET(e); 1275e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1276e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (t->verdict == offset) 1277e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*ref)++; 1278e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1279e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1280e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1281e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1282e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1283e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Get the number of references to this chain. */ 1284e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 128579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_GET_REFERENCES(unsigned int *ref, const IPT_CHAINLABEL chain, 128679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1287e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 128830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1289e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 129030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1291e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1292e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1293e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1294e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1295e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *ref = 0; 1296725d97a79cf0b332ed45cb7d254915178328427dRusty Russell ENTRY_ITERATE((*handle)->entries.entrytable, 129779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell (*handle)->entries.size, 129879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell count_ref, entry2offset(*handle, c->start), ref); 1299e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1300e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1301e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1302e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Deletes a chain. */ 1303e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 130479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_DELETE_CHAIN(const IPT_CHAINLABEL chain, TC_HANDLE_T *handle) 1305e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 130630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int labelidx, labeloff; 1307e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int references; 130830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1309e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int ret; 1310e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 131179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (!TC_GET_REFERENCES(&references, chain, handle)) 1312e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 13137e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 131479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_DELETE_CHAIN; 1315e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 131679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (TC_BUILTIN(chain, *handle)) { 1317e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1318e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1319e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1320e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1321e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (references > 0) { 1322e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EMLINK; 1323e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1324e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1325e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 132630fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(chain, *handle))) { 1327e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1328e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1329e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1330e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 133130fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((void *)c->start != c->end) { 1332e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOTEMPTY; 1333e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1334e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1335e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1336e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Need label index: preceeds chain start */ 133730fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell labelidx = entry2index(*handle, c->start) - 1; 1338e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher labeloff = index2offset(*handle, labelidx); 1339e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1340e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher ret = delete_rules(2, 1341e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher get_entry(*handle, labeloff)->next_offset 134230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell + c->start->next_offset, 1343e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher labeloff, labelidx, handle); 1344e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return ret; 1345e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1346e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1347e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Renames a chain. */ 134879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellint TC_RENAME_CHAIN(const IPT_CHAINLABEL oldname, 134979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const IPT_CHAINLABEL newname, 135079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1351e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 135230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell unsigned int labeloff, labelidx; 135330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell struct chain_cache *c; 1354e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct ipt_error_target *t; 1355e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 135679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_RENAME_CHAIN; 1357e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1358e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* find_label doesn't cover built-in targets: DROP, ACCEPT 1359e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher RETURN. */ 136030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (find_label(newname, *handle) 136179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(newname, LABEL_DROP) == 0 136279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(newname, LABEL_ACCEPT) == 0 136379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || strcmp(newname, LABEL_RETURN) == 0) { 1364e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EEXIST; 1365e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1366e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1367e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 136830fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if (!(c = find_label(oldname, *handle)) 136979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell || TC_BUILTIN(oldname, *handle)) { 1370e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOENT; 1371e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1372e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1373e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 137479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strlen(newname)+1 > sizeof(IPT_CHAINLABEL)) { 1375e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1376e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1377e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1378e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1379e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Need label index: preceeds chain start */ 138030fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell labelidx = entry2index(*handle, c->start) - 1; 1381e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher labeloff = index2offset(*handle, labelidx); 1382e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1383e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t = (struct ipt_error_target *) 138479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell GET_TARGET(get_entry(*handle, labeloff)); 1385e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1386e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memset(t->error, 0, sizeof(t->error)); 1387e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(t->error, newname); 1388175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell set_changed(*handle); 1389e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1390e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1391e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1392e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1393e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Sets the policy on a built-in chain. */ 1394e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 139579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_SET_POLICY(const IPT_CHAINLABEL chain, 139679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const IPT_CHAINLABEL policy, 139779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell TC_HANDLE_T *handle) 1398e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1399e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int hook; 1400e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int policyoff; 140179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_ENTRY *e; 140279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_STANDARD_TARGET *t; 1403e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 140479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell iptc_fn = TC_SET_POLICY; 1405e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Figure out which chain. */ 140679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell hook = TC_BUILTIN(chain, *handle); 1407e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (hook == 0) { 1408c8264991454b5e77279830736f80ea3153b6f814Marc Boucher errno = ENOENT; 1409e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1410e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } else 1411e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher hook--; 1412e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1413e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher policyoff = get_chain_end(*handle, (*handle)->info.hook_entry[hook]); 1414e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (policyoff != (*handle)->info.underflow[hook]) { 1415e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher printf("ERROR: Policy for `%s' offset %u != underflow %u\n", 1416e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher chain, policyoff, (*handle)->info.underflow[hook]); 1417e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1418e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1419e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1420e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher e = get_entry(*handle, policyoff); 142179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell t = (STRUCT_STANDARD_TARGET *)GET_TARGET(e); 1422e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 142379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (strcmp(policy, LABEL_ACCEPT) == 0) 1424e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict = -NF_ACCEPT - 1; 142579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell else if (strcmp(policy, LABEL_DROP) == 0) 1426e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher t->verdict = -NF_DROP - 1; 1427e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher else { 1428e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = EINVAL; 1429e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1430e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1431e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->counter_map[entry2index(*handle, e)] 1432e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher = ((struct counter_map){ COUNTER_MAP_NOMAP, 0 }); 1433175f64177743e5a417e98d483ef995bf7151f3bcRusty Russell set_changed(*handle); 1434e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1435e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1436e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1437e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1438e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Without this, on gcc 2.7.2.3, we get: 143979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell libiptc.c: In function `TC_COMMIT': 1440e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher libiptc.c:833: fixed or forbidden register was spilled. 1441e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher This may be due to a compiler bug or to impossible asm 1442e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher statements or clauses. 1443e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher*/ 1444e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherstatic void 144579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russellsubtract_counters(STRUCT_COUNTERS *answer, 144679dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_COUNTERS *a, 144779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell const STRUCT_COUNTERS *b) 1448e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1449e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher answer->pcnt = a->pcnt - b->pcnt; 1450e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher answer->bcnt = a->bcnt - b->bcnt; 1451e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1452e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1453e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 145479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_COMMIT(TC_HANDLE_T *handle) 1455e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1456e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Replace, then map back the counters. */ 145779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_REPLACE *repl; 145879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell STRUCT_COUNTERS_INFO *newcounters; 1459e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 1460e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher size_t counterlen 146179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell = sizeof(STRUCT_COUNTERS_INFO) 146279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell + sizeof(STRUCT_COUNTERS) * (*handle)->new_number; 1463e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1464e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher CHECK(*handle); 1465e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#if 0 146654c307e0ff401f40a6fe382af4ae5bff0f5b40baRusty Russell TC_DUMP_ENTRIES(*handle); 1467e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher#endif 1468e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1469e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Don't commit if nothing changed. */ 1470e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!(*handle)->changed) 1471e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher goto finished; 1472e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1473e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl = malloc(sizeof(*repl) + (*handle)->entries.size); 1474e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!repl) { 1475e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 1476e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1477e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1478e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1479e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* These are the old counters we will get from kernel */ 148079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell repl->counters = malloc(sizeof(STRUCT_COUNTERS) 1481e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * (*handle)->info.num_entries); 1482e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!repl->counters) { 1483e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1484e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 1485e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1486e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 14877e53bf9c2a697abdb6f1385557338423a86612a3Rusty Russell 1488e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* These are the counters we're going to put back, later. */ 1489e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newcounters = malloc(counterlen); 1490e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if (!newcounters) { 1491e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl->counters); 1492e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1493e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher errno = ENOMEM; 1494e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1495e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1496e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1497e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(repl->name, (*handle)->info.name); 1498e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl->num_entries = (*handle)->new_number; 1499e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl->size = (*handle)->entries.size; 1500e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(repl->hook_entry, (*handle)->info.hook_entry, 1501e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(repl->hook_entry)); 1502e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher memcpy(repl->underflow, (*handle)->info.underflow, 1503e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(repl->underflow)); 1504e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl->num_counters = (*handle)->info.num_entries; 1505e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher repl->valid_hooks = (*handle)->info.valid_hooks; 1506725d97a79cf0b332ed45cb7d254915178328427dRusty Russell memcpy(repl->entries, (*handle)->entries.entrytable, 1507e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher (*handle)->entries.size); 1508e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 150979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (setsockopt(sockfd, TC_IPPROTO, SO_SET_REPLACE, repl, 1510e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher sizeof(*repl) + (*handle)->entries.size) < 0) { 1511e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl->counters); 1512e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1513e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(newcounters); 1514e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1515e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1516e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1517e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Put counters back. */ 1518e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher strcpy(newcounters->name, (*handle)->info.name); 1519e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newcounters->num_counters = (*handle)->new_number; 1520e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (i = 0; i < (*handle)->new_number; i++) { 1521e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int mappos = (*handle)->counter_map[i].mappos; 1522e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher switch ((*handle)->counter_map[i].maptype) { 1523e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher case COUNTER_MAP_NOMAP: 1524e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newcounters->counters[i] 152579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell = ((STRUCT_COUNTERS){ 0, 0 }); 1526e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher break; 1527e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1528e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher case COUNTER_MAP_NORMAL_MAP: 1529e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Original read: X. 1530e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Atomic read on replacement: X + Y. 1531e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Currently in kernel: Z. 1532e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Want in kernel: X + Y + Z. 1533e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * => Add in X + Y 1534e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * => Add in replacement read. 1535e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher */ 1536e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher newcounters->counters[i] = repl->counters[mappos]; 1537e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher break; 1538e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1539e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher case COUNTER_MAP_ZEROED: 1540e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* Original read: X. 1541e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Atomic read on replacement: X + Y. 1542e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Currently in kernel: Z. 1543e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * Want in kernel: Y + Z. 1544e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * => Add in Y. 1545e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher * => Add in (replacement read - original read). 1546e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher */ 1547e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher subtract_counters(&newcounters->counters[i], 1548e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher &repl->counters[mappos], 1549e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher &index2entry(*handle, i)->counters); 1550e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher break; 1551e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1552e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 155362527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell 155462527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell#ifdef KERNEL_64_USERSPACE_32 155562527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell { 155662527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell /* Kernel will think that pointer should be 64-bits, and get 155762527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell padding. So we accomodate here (assumption: alignment of 155862527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell `counters' is on 64-bit boundary). */ 155962527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell u_int64_t *kernptr = (u_int64_t *)&newcounters->counters; 156062527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell if ((unsigned long)&newcounters->counters % 8 != 0) { 156162527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell fprintf(stderr, 156262527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell "counters alignment incorrect! Mail rusty!\n"); 156362527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell abort(); 156462527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell } 156562527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell *kernptr = newcounters->counters; 156654c307e0ff401f40a6fe382af4ae5bff0f5b40baRusty Russell } 156762527ce5f0ffaa5b18aa118f64c21af238ddc156Rusty Russell#endif /* KERNEL_64_USERSPACE_32 */ 1568e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 156979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell if (setsockopt(sockfd, TC_IPPROTO, SO_SET_ADD_COUNTERS, 157079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell newcounters, counterlen) < 0) { 1571e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl->counters); 1572e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1573e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(newcounters); 1574e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 0; 1575e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1576e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1577e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl->counters); 1578e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(repl); 1579e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(newcounters); 1580e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1581e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher finished: 158230fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell if ((*handle)->cache_chain_heads) 158330fd6e5d45e6013f4df10a226787c7a9f49369c1Rusty Russell free((*handle)->cache_chain_heads); 1584e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher free(*handle); 1585e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher *handle = NULL; 1586e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return 1; 1587e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1588e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1589e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Get raw socket. */ 1590e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherint 159179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_GET_RAW_SOCKET() 1592e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1593e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return sockfd; 1594e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1595e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1596e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher/* Translates errno numbers into more human-readable form than strerror. */ 1597e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucherconst char * 159879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty RussellTC_STRERROR(int err) 1599e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher{ 1600e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher unsigned int i; 1601e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher struct table_struct { 1602e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher void *fn; 1603e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher int err; 1604e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher const char *message; 1605e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } table [] = 1606e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher { { NULL, 0, "Incompatible with this kernel" }, 1607e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher { NULL, ENOPROTOOPT, "iptables who? (do you need to insmod?)" }, 1608e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher { NULL, ENOSYS, "Will be implemented real soon. I promise." }, 1609e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher { NULL, ENOMEM, "Memory allocation problem" }, 161079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_INIT, EPERM, "Permission denied (you must be root)" }, 161179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_INIT, EINVAL, "Module is wrong version" }, 1612d57390ea8aaeecbcd69ad2b44f76d0f7973363d3Rusty Russell { TC_INIT, ENOENT, "Table does not exist (do you need to insmod?)" }, 161379dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_CHAIN, ENOTEMPTY, "Chain is not empty" }, 161479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_CHAIN, EINVAL, "Can't delete built-in chain" }, 161579dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_CHAIN, EMLINK, 1616e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher "Can't delete chain with references left" }, 161779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_CREATE_CHAIN, EEXIST, "Chain already exists" }, 161879dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_INSERT_ENTRY, E2BIG, "Index of insertion too big" }, 161979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_REPLACE_ENTRY, E2BIG, "Index of replacement too big" }, 162079dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_NUM_ENTRY, E2BIG, "Index of deletion too big" }, 162179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_INSERT_ENTRY, ELOOP, "Loop found in table" }, 162279dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_INSERT_ENTRY, EINVAL, "Target problem" }, 1623e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* EINVAL for CHECK probably means bad interface. */ 162479dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_CHECK_PACKET, EINVAL, 1625c8264991454b5e77279830736f80ea3153b6f814Marc Boucher "Bad arguments (does that interface exist?)" }, 1626e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher /* ENOENT for DELETE probably means no matching rule */ 162779dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_DELETE_ENTRY, ENOENT, 1628c8264991454b5e77279830736f80ea3153b6f814Marc Boucher "Bad rule (does a matching rule exist in that chain?)" }, 162979dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_SET_POLICY, ENOENT, 1630c8264991454b5e77279830736f80ea3153b6f814Marc Boucher "Bad built-in chain name" }, 163179dee0702b18c8ea1d1f7a2b1f6b29349466986bRusty Russell { TC_SET_POLICY, EINVAL, 1632c8264991454b5e77279830736f80ea3153b6f814Marc Boucher "Bad policy name" }, 1633f68ce299449ab886491bbab1a8fb3ce36be3de9fRusty Russell { NULL, ENOENT, "No chain/target/match by that name" } 1634e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher }; 1635e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1636e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher for (i = 0; i < sizeof(table)/sizeof(struct table_struct); i++) { 1637e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher if ((!table[i].fn || table[i].fn == iptc_fn) 1638e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher && table[i].err == err) 1639e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return table[i].message; 1640e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher } 1641e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher 1642e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher return strerror(err); 1643e6869a8f59d779ff4d5a0984c86d80db7078496Marc Boucher} 1644