xtoptions.c revision 66266abd17adc9631f3769ef0b82968c0bac6f38
1aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt/* 2aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Argument parser 3aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Copyright © Jan Engelhardt, 2011 4aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * 5aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * This program is free software; you can redistribute it and/or 6aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * modify it under the terms of the GNU General Public License as 7aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * published by the Free Software Foundation; either version 2 of 8aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * the License, or (at your option) any later version. 9aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 102e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt#include <ctype.h> 11aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <errno.h> 12aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <getopt.h> 13aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <limits.h> 14aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <netdb.h> 15aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <stdbool.h> 16aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <stdint.h> 17aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <stdio.h> 18aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <stdlib.h> 19aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <string.h> 2041a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt#include <syslog.h> 21aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include <arpa/inet.h> 2261cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt#include <netinet/ip.h> 23aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include "xtables.h" 24aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#include "xshared.h" 2561cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt#ifndef IPTOS_NORMALSVC 2661cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt# define IPTOS_NORMALSVC 0 2761cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt#endif 28aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 29aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt#define XTOPT_MKPTR(cb) \ 30aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt ((void *)((char *)(cb)->data + (cb)->entry->ptroff)) 31aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 32aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt/** 3341a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt * Simple key-value pairs for syslog levels 3441a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt */ 3541a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardtstruct syslog_level { 3641a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt char name[8]; 3741a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt uint8_t level; 3841a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt}; 3941a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt 4061cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardtstruct tos_value_mask { 4161cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt uint8_t value, mask; 4261cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt}; 4361cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 4441a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt/** 45aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Creates getopt options from the x6-style option map, and assigns each a 46aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * getopt id. 47aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 48aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtstruct option * 49aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtxtables_options_xfrm(struct option *orig_opts, struct option *oldopts, 50aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt const struct xt_option_entry *entry, unsigned int *offset) 51aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt{ 52aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt unsigned int num_orig, num_old = 0, num_new, i; 53aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt struct option *merge, *mp; 54aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 55aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (entry == NULL) 56aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt return oldopts; 57aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt for (num_orig = 0; orig_opts[num_orig].name != NULL; ++num_orig) 58aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt ; 59aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (oldopts != NULL) 60aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt for (num_old = 0; oldopts[num_old].name != NULL; ++num_old) 61aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt ; 62aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt for (num_new = 0; entry[num_new].name != NULL; ++num_new) 63aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt ; 64aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 65aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* 66aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Since @oldopts also has @orig_opts already (and does so at the 67aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * start), skip these entries. 68aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 69aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt oldopts += num_orig; 70aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt num_old -= num_orig; 71aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 72aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt merge = malloc(sizeof(*mp) * (num_orig + num_old + num_new + 1)); 73aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (merge == NULL) 74aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt return NULL; 75aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 76aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* Let the base options -[ADI...] have precedence over everything */ 77aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt memcpy(merge, orig_opts, sizeof(*mp) * num_orig); 78aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt mp = merge + num_orig; 79aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 80aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* Second, the new options */ 81aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->option_offset += XT_OPTION_OFFSET_SCALE; 82aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt *offset = xt_params->option_offset; 83aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 84aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt for (i = 0; i < num_new; ++i, ++mp, ++entry) { 85aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt mp->name = entry->name; 86aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt mp->has_arg = entry->type != XTTYPE_NONE; 87aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt mp->flag = NULL; 88aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt mp->val = entry->id + *offset; 89aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt } 90aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 91aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* Third, the old options */ 92aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt memcpy(mp, oldopts, sizeof(*mp) * num_old); 93aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt mp += num_old; 94aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xtables_free_opts(0); 95aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 96aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* Clear trailing entry */ 97aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt memset(mp, 0, sizeof(*mp)); 98aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt return merge; 99aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt} 100aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 101a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt/** 102a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt * Require a simple integer. 103a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt */ 104a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardtstatic void xtopt_parse_int(struct xt_option_call *cb) 105a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt{ 106a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt const struct xt_option_entry *entry = cb->entry; 1078b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt unsigned long long lmin = 0, lmax = UINT32_MAX; 108a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt unsigned int value; 109a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt 110dfe99f1bf291b4b954d3608dbe95a43e16a8bb49Jan Engelhardt if (entry->type == XTTYPE_UINT8) 111dfe99f1bf291b4b954d3608dbe95a43e16a8bb49Jan Engelhardt lmax = UINT8_MAX; 1120eff54bd407aae6b99c3b189d356929e399b5a38Jan Engelhardt else if (entry->type == XTTYPE_UINT16) 1130eff54bd407aae6b99c3b189d356929e399b5a38Jan Engelhardt lmax = UINT16_MAX; 1148b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt else if (entry->type == XTTYPE_UINT64) 1158b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt lmax = UINT64_MAX; 116d78254d7f9d18ef76377a3013302430cce8ea702Jan Engelhardt if (cb->entry->min != 0) 117d78254d7f9d18ef76377a3013302430cce8ea702Jan Engelhardt lmin = cb->entry->min; 118d78254d7f9d18ef76377a3013302430cce8ea702Jan Engelhardt if (cb->entry->max != 0) 119d78254d7f9d18ef76377a3013302430cce8ea702Jan Engelhardt lmax = cb->entry->max; 120d78254d7f9d18ef76377a3013302430cce8ea702Jan Engelhardt 121a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt if (!xtables_strtoui(cb->arg, NULL, &value, lmin, lmax)) 122a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 123a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt "%s: bad value for option \"--%s\", " 1248b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt "or out of range (%llu-%llu).\n", 125a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt cb->ext_name, entry->name, lmin, lmax); 126a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt 127dfe99f1bf291b4b954d3608dbe95a43e16a8bb49Jan Engelhardt if (entry->type == XTTYPE_UINT8) { 128dfe99f1bf291b4b954d3608dbe95a43e16a8bb49Jan Engelhardt cb->val.u8 = value; 129dfe99f1bf291b4b954d3608dbe95a43e16a8bb49Jan Engelhardt if (entry->flags & XTOPT_PUT) 130dfe99f1bf291b4b954d3608dbe95a43e16a8bb49Jan Engelhardt *(uint8_t *)XTOPT_MKPTR(cb) = cb->val.u8; 1310eff54bd407aae6b99c3b189d356929e399b5a38Jan Engelhardt } else if (entry->type == XTTYPE_UINT16) { 1320eff54bd407aae6b99c3b189d356929e399b5a38Jan Engelhardt cb->val.u16 = value; 1330eff54bd407aae6b99c3b189d356929e399b5a38Jan Engelhardt if (entry->flags & XTOPT_PUT) 1340eff54bd407aae6b99c3b189d356929e399b5a38Jan Engelhardt *(uint16_t *)XTOPT_MKPTR(cb) = cb->val.u16; 135dfe99f1bf291b4b954d3608dbe95a43e16a8bb49Jan Engelhardt } else if (entry->type == XTTYPE_UINT32) { 136a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt cb->val.u32 = value; 137a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt if (entry->flags & XTOPT_PUT) 138a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt *(uint32_t *)XTOPT_MKPTR(cb) = cb->val.u32; 1398b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt } else if (entry->type == XTTYPE_UINT64) { 1408b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt cb->val.u64 = value; 1418b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt if (entry->flags & XTOPT_PUT) 1428b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt *(uint64_t *)XTOPT_MKPTR(cb) = cb->val.u64; 143a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt } 144a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt} 145a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt 14604bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt/** 147f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt * Require a simple floating point number. 148f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt */ 149f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardtstatic void xtopt_parse_float(struct xt_option_call *cb) 150f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt{ 151f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt const struct xt_option_entry *entry = cb->entry; 152f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt double value; 153f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt char *end; 154f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt 155f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt value = strtod(cb->arg, &end); 156f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt if (end == cb->arg || *end != '\0' || 157f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt (entry->min != entry->max && 158f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt (value < entry->min || value > entry->max))) 159f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 160f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt "%s: bad value for option \"--%s\", " 161f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt "or out of range (%u-%u).\n", 162f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt cb->ext_name, entry->name, entry->min, entry->max); 163f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt 164f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt cb->val.dbl = value; 165f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt if (entry->flags & XTOPT_PUT) 166f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt *(double *)XTOPT_MKPTR(cb) = cb->val.dbl; 167f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt} 168f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt 169f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt/** 17004bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt * Multiple integer parse routine. 17104bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt * 17204bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt * This function is capable of parsing any number of fields. Only the first 17304bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt * two values from the string will be put into @cb however (and as such, 17404bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt * @cb->val.uXX_range is just that large) to cater for the few extensions that 17504bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt * do not have a range[2] field, but {min, max}, and which cannot use 17604bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt * XTOPT_POINTER. 17704bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt */ 17804bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardtstatic void xtopt_parse_mint(struct xt_option_call *cb) 17904bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt{ 18004bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt const struct xt_option_entry *entry = cb->entry; 18104bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt const char *arg = cb->arg; 182564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt size_t esize = sizeof(uint32_t); 183564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt char *put = XTOPT_MKPTR(cb); 18404bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt unsigned int maxiter, value; 18504bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt char *end = ""; 18604bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt char sep = ':'; 18704bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt 1888bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt if (entry->type == XTTYPE_UINT8RC) 1898bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt esize = sizeof(uint8_t); 1908bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt else if (entry->type == XTTYPE_UINT16RC) 191564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt esize = sizeof(uint16_t); 192bc438c4cbdab09fafbbceecddd54e44e4234a4a1Jan Engelhardt else if (entry->type == XTTYPE_UINT64RC) 193bc438c4cbdab09fafbbceecddd54e44e4234a4a1Jan Engelhardt esize = sizeof(uint64_t); 194564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt maxiter = entry->size / esize; 19504bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt if (maxiter == 0) 19604bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt maxiter = 2; /* ARRAY_SIZE(cb->val.uXX_range) */ 197564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt if (entry->size % esize != 0) 19804bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt xt_params->exit_err(OTHER_PROBLEM, "%s: memory block does " 19904bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt "not have proper size\n", __func__); 20004bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt 20104bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt cb->nvals = 0; 20204bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt for (arg = cb->arg; ; arg = end + 1) { 20304bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt if (cb->nvals == maxiter) 20404bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, "%s: Too many " 20504bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt "components for option \"--%s\" (max: %u)\n", 20604bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt cb->ext_name, entry->name, maxiter); 20704bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt if (!xtables_strtoui(arg, &end, &value, 0, UINT32_MAX)) 20804bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 20904bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt "%s: bad value for option \"--%s\", " 21004bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt "or out of range (0-%u).\n", 21104bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt cb->ext_name, entry->name, UINT32_MAX); 21204bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt if (*end != '\0' && *end != sep) 21304bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 21404bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt "%s: Argument to \"--%s\" has unexpected " 21504bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt "characters.\n", cb->ext_name, entry->name); 216564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt if (cb->nvals < ARRAY_SIZE(cb->val.u32_range)) { 2178bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt if (entry->type == XTTYPE_UINT8RC) 2188bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt cb->val.u8_range[cb->nvals] = value; 2198bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt else if (entry->type == XTTYPE_UINT16RC) 220564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt cb->val.u16_range[cb->nvals] = value; 221564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt else if (entry->type == XTTYPE_UINT32RC) 222564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt cb->val.u32_range[cb->nvals] = value; 223bc438c4cbdab09fafbbceecddd54e44e4234a4a1Jan Engelhardt else if (entry->type == XTTYPE_UINT64RC) 224bc438c4cbdab09fafbbceecddd54e44e4234a4a1Jan Engelhardt cb->val.u64_range[cb->nvals] = value; 225564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt } 2260787a82873fe9db5dea478942b183e6ff2a8500dJan Engelhardt ++cb->nvals; 227564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt if (entry->flags & XTOPT_PUT) { 2288bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt if (entry->type == XTTYPE_UINT8RC) 2298bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt *(uint8_t *)put = value; 2308bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt else if (entry->type == XTTYPE_UINT16RC) 231564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt *(uint16_t *)put = value; 232564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt else if (entry->type == XTTYPE_UINT32RC) 233564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt *(uint32_t *)put = value; 234bc438c4cbdab09fafbbceecddd54e44e4234a4a1Jan Engelhardt else if (entry->type == XTTYPE_UINT64RC) 235bc438c4cbdab09fafbbceecddd54e44e4234a4a1Jan Engelhardt *(uint64_t *)put = value; 236564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt put += esize; 237564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt } 23804bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt if (*end == '\0') 23904bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt break; 24004bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt } 24104bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt} 24204bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt 2434a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardtstatic void xtopt_parse_string(struct xt_option_call *cb) 2444a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt{ 2454a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt const struct xt_option_entry *entry = cb->entry; 2464a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt size_t z = strlen(cb->arg); 2474a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt char *p; 2484a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt 2494a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt if (entry->min != 0 && z < entry->min) 2504a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 2514a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt "Argument must have a minimum length of " 2524a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt "%u characters\n", entry->min); 2534a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt if (entry->max != 0 && z > entry->max) 2544a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 2554a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt "Argument must have a maximum length of " 2564a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt "%u characters\n", entry->max); 2574a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt if (!(entry->flags & XTOPT_PUT)) 2584a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt return; 2594a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt if (z >= entry->size) 2604a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt z = entry->size - 1; 2614a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt p = XTOPT_MKPTR(cb); 2624a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt strncpy(p, cb->arg, z); 2634a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt p[z] = '\0'; 2644a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt} 2654a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt 26661cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardtstatic const struct tos_symbol_info { 26761cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt unsigned char value; 26861cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt const char *name; 26961cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt} tos_symbol_names[] = { 27061cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt {IPTOS_LOWDELAY, "Minimize-Delay"}, 27161cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt {IPTOS_THROUGHPUT, "Maximize-Throughput"}, 27261cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt {IPTOS_RELIABILITY, "Maximize-Reliability"}, 27361cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt {IPTOS_MINCOST, "Minimize-Cost"}, 27461cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt {IPTOS_NORMALSVC, "Normal-Service"}, 27561cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt {}, 27661cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt}; 27761cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 27861cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt/* 27961cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * tos_parse_numeric - parse a string like "15/255" 28061cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * 28161cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * @str: input string 28261cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * @tvm: (value/mask) tuple 28361cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * @max: maximum allowed value (must be pow(2,some_int)-1) 28461cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt */ 28561cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardtstatic bool tos_parse_numeric(const char *str, struct xt_option_call *cb, 28661cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt unsigned int max) 28761cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt{ 28861cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt unsigned int value; 28961cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt char *end; 29061cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 29161cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt xtables_strtoui(str, &end, &value, 0, max); 29261cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt cb->val.tos_value = value; 29361cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt cb->val.tos_mask = max; 29461cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 29561cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt if (*end == '/') { 29661cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt const char *p = end + 1; 29761cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 29861cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt if (!xtables_strtoui(p, &end, &value, 0, max)) 29961cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt xtables_error(PARAMETER_PROBLEM, "Illegal value: \"%s\"", 30061cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt str); 30161cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt cb->val.tos_mask = value; 30261cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt } 30361cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 30461cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt if (*end != '\0') 30561cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt xtables_error(PARAMETER_PROBLEM, "Illegal value: \"%s\"", str); 30661cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt return true; 30761cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt} 30861cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 30961cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt/** 31061cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * @str: input string 31161cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * @tvm: (value/mask) tuple 31261cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * @def_mask: mask to force when a symbolic name is used 31361cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt */ 31461cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardtstatic void xtopt_parse_tosmask(struct xt_option_call *cb) 31561cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt{ 31661cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt const struct tos_symbol_info *symbol; 31761cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt char *tmp; 31861cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 31961cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt if (xtables_strtoui(cb->arg, &tmp, NULL, 0, UINT8_MAX)) { 32061cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt tos_parse_numeric(cb->arg, cb, UINT8_MAX); 32161cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt return; 32261cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt } 32361cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt /* 32461cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * This is our way we deal with different defaults 32561cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt * for different revisions. 32661cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt */ 32761cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt cb->val.tos_mask = cb->entry->max; 32861cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt for (symbol = tos_symbol_names; symbol->name != NULL; ++symbol) 32961cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt if (strcasecmp(cb->arg, symbol->name) == 0) { 33061cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt cb->val.tos_value = symbol->value; 33161cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt return; 33261cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt } 33361cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 33461cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt xtables_error(PARAMETER_PROBLEM, "Symbolic name \"%s\" is unknown", 33561cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt cb->arg); 33661cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt} 33761cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt 338d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt/** 339d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt * Validate the input for being conformant to "mark[/mask]". 340d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt */ 341d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardtstatic void xtopt_parse_markmask(struct xt_option_call *cb) 342d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt{ 343d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt unsigned int mark = 0, mask = ~0U; 344d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt char *end; 345d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt 346d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt if (!xtables_strtoui(cb->arg, &end, &mark, 0, UINT32_MAX)) 347d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 348d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt "%s: bad mark value for option \"--%s\", " 349d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt "or out of range.\n", 350d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt cb->ext_name, cb->entry->name); 351d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt if (*end == '/' && 352d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt !xtables_strtoui(end + 1, &end, &mask, 0, UINT32_MAX)) 353d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 354d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt "%s: bad mask value for option \"--%s\", " 355d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt "or out of range.\n", 356d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt cb->ext_name, cb->entry->name); 357d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt if (*end != '\0') 358d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 359d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt "%s: trailing garbage after value " 360d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt "for option \"--%s\".\n", 361d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt cb->ext_name, cb->entry->name); 362d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt cb->val.mark = mark; 363d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt cb->val.mask = mask; 364d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt} 365d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt 36641a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardtstatic int xtopt_sysloglvl_compare(const void *a, const void *b) 36741a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt{ 36841a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt const char *name = a; 36941a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt const struct syslog_level *entry = b; 37041a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt 37141a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt return strcmp(name, entry->name); 37241a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt} 37341a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt 37441a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardtstatic void xtopt_parse_sysloglevel(struct xt_option_call *cb) 37541a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt{ 37641a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt static const struct syslog_level log_names[] = { /* must be sorted */ 37741a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt {"alert", LOG_ALERT}, 37841a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt {"crit", LOG_CRIT}, 37941a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt {"debug", LOG_DEBUG}, 38041a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt {"emerg", LOG_EMERG}, 38141a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt {"error", LOG_ERR}, /* deprecated */ 38241a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt {"info", LOG_INFO}, 38341a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt {"notice", LOG_NOTICE}, 38441a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt {"panic", LOG_EMERG}, /* deprecated */ 38541a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt {"warning", LOG_WARNING}, 38641a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt }; 38741a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt const struct syslog_level *e; 38841a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt unsigned int num = 0; 38941a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt 39041a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt if (!xtables_strtoui(cb->arg, NULL, &num, 0, 7)) { 39141a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt e = bsearch(cb->arg, log_names, ARRAY_SIZE(log_names), 39241a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt sizeof(*log_names), xtopt_sysloglvl_compare); 39341a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt if (e == NULL) 39441a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 39541a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt "log level \"%s\" unknown\n", cb->arg); 39641a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt num = e->level; 39741a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt } 39841a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt cb->val.syslog_level = num; 39941a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt if (cb->entry->flags & XTOPT_PUT) 40041a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt *(uint8_t *)XTOPT_MKPTR(cb) = num; 40141a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt} 40241a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt 4032b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardtstatic void *xtables_sa_host(const void *sa, unsigned int afproto) 4042b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt{ 4052b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt if (afproto == AF_INET6) 4062b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt return &((struct sockaddr_in6 *)sa)->sin6_addr; 4072b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt else if (afproto == AF_INET) 4082b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt return &((struct sockaddr_in *)sa)->sin_addr; 4092b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt return (void *)sa; 4102b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt} 4112b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt 4122b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardtstatic socklen_t xtables_sa_hostlen(unsigned int afproto) 4132b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt{ 4142b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt if (afproto == AF_INET6) 4152b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt return sizeof(struct in6_addr); 4162b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt else if (afproto == AF_INET) 4172b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt return sizeof(struct in_addr); 4182b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt return 0; 4192b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt} 4202b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt 4212b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt/** 422d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt * Accepts: a hostname (DNS), or a single inetaddr - without any mask. The 423d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt * result is stored in @cb->val.haddr. Additionally, @cb->val.hmask and 424d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt * @cb->val.hlen are set for completeness to the appropriate values. 4252b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt */ 426d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardtstatic void xtopt_parse_host(struct xt_option_call *cb) 4272b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt{ 4282b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt struct addrinfo hints = {.ai_family = afinfo->family}; 4292b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt unsigned int adcount = 0; 4302b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt struct addrinfo *res, *p; 4312b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt int ret; 4322b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt 4332b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt ret = getaddrinfo(cb->arg, NULL, &hints, &res); 4342b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt if (ret < 0) 4352b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 4362b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt "getaddrinfo: %s\n", gai_strerror(ret)); 4372b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt 438d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt memset(&cb->val.hmask, 0xFF, sizeof(cb->val.hmask)); 439d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt cb->val.hlen = (afinfo->family == NFPROTO_IPV4) ? 32 : 128; 440d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt 4412b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt for (p = res; p != NULL; p = p->ai_next) { 4422b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt if (adcount == 0) { 443d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt memset(&cb->val.haddr, 0, sizeof(cb->val.haddr)); 444d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt memcpy(&cb->val.haddr, 4452b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt xtables_sa_host(p->ai_addr, p->ai_family), 4462b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt xtables_sa_hostlen(p->ai_family)); 4472b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt ++adcount; 4482b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt continue; 4492b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt } 450d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt if (memcmp(&cb->val.haddr, 4512b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt xtables_sa_host(p->ai_addr, p->ai_family), 4522b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt xtables_sa_hostlen(p->ai_family)) != 0) 4532b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 4542b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt "%s resolves to more than one address\n", 4552b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt cb->arg); 4562b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt } 4572b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt 4582b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt freeaddrinfo(res); 4592b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt if (cb->entry->flags & XTOPT_PUT) 4602b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt /* Validation in xtables_option_metavalidate */ 461d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt memcpy(XTOPT_MKPTR(cb), &cb->val.haddr, 462d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt sizeof(cb->val.haddr)); 4632b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt} 4642b01f706e7ba48d72e57f8e47457a86d9ed44992Jan Engelhardt 465b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt/** 466b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt * @name: port name, or number as a string (e.g. "http" or "80") 467b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt * 468b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt * Resolve a port name to a number. Returns the port number in integral 469b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt * form on success, or <0 on error. (errno will not be set.) 470b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt */ 471b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardtstatic int xtables_getportbyname(const char *name) 472b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt{ 473b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt struct addrinfo *res = NULL, *p; 474b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt int ret; 475b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt 476b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt ret = getaddrinfo(NULL, name, NULL, &res); 477b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt if (ret < 0) 478b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt return -1; 479b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt ret = -1; 480b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt for (p = res; p != NULL; p = p->ai_next) { 481b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt if (p->ai_family == AF_INET6) { 482b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt ret = ((struct sockaddr_in6 *)p->ai_addr)->sin6_port; 483b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt break; 484b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt } else if (p->ai_family == AF_INET) { 485b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt ret = ((struct sockaddr_in *)p->ai_addr)->sin_port; 486b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt break; 487b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt } 488b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt } 489b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt freeaddrinfo(res); 49044517bda3d8130638882f69478a8091316f30cbbJan Engelhardt if (ret < 0) 49144517bda3d8130638882f69478a8091316f30cbbJan Engelhardt return ret; 492b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt return ntohs(ret); 493b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt} 494b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt 495b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt/** 496d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt * Validate and parse a port specification and put the result into 497d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt * @cb->val.port. 498b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt */ 499b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardtstatic void xtopt_parse_port(struct xt_option_call *cb) 500b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt{ 501b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt int ret; 502b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt 503b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt ret = xtables_getportbyname(cb->arg); 504b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt if (ret < 0) 505b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 506b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt "Port \"%s\" does not resolve to anything.\n", 507b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt cb->arg); 508b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt cb->val.port = ret; 509b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt if (cb->entry->type == XTTYPE_PORT_NE) 510b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt cb->val.port = htons(cb->val.port); 511b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt if (cb->entry->flags & XTOPT_PUT) 512b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt *(uint16_t *)XTOPT_MKPTR(cb) = cb->val.port; 513b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt} 514b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt 515f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardtstatic void xtopt_parse_mport(struct xt_option_call *cb) 516f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt{ 517f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt static const size_t esize = sizeof(uint16_t); 518f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt const struct xt_option_entry *entry = cb->entry; 519f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt char *lo_arg, *wp_arg, *arg; 520f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt unsigned int maxiter; 521f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt int value; 522f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt 523f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt wp_arg = lo_arg = strdup(cb->arg); 524f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (lo_arg == NULL) 525f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt xt_params->exit_err(RESOURCE_PROBLEM, "strdup"); 526f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt 527f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt maxiter = entry->size / esize; 528f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (maxiter == 0) 529f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt maxiter = 2; /* ARRAY_SIZE(cb->val.port_range) */ 530f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (entry->size % esize != 0) 531f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt xt_params->exit_err(OTHER_PROBLEM, "%s: memory block does " 532f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt "not have proper size\n", __func__); 533f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt 534f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt cb->val.port_range[0] = 0; 535f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt cb->val.port_range[1] = UINT16_MAX; 536f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt cb->nvals = 0; 537f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt 538f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt while ((arg = strsep(&wp_arg, ":")) != NULL) { 539f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (cb->nvals == maxiter) 540f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, "%s: Too many " 541f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt "components for option \"--%s\" (max: %u)\n", 542f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt cb->ext_name, entry->name, maxiter); 543f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (*arg == '\0') { 544f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt ++cb->nvals; 545f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt continue; 546f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt } 547f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt 548f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt value = xtables_getportbyname(arg); 549f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (value < 0) 550f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 551f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt "Port \"%s\" does not resolve to " 552f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt "anything.\n", arg); 553f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (entry->type == XTTYPE_PORTRC_NE) 554f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt value = htons(value); 555f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (cb->nvals < ARRAY_SIZE(cb->val.port_range)) 556f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt cb->val.port_range[cb->nvals] = value; 557f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt ++cb->nvals; 558f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt } 559f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt 560f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (cb->nvals == 1) { 561f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt cb->val.port_range[1] = cb->val.port_range[0]; 562f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt ++cb->nvals; 563f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt } 564f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt if (entry->flags & XTOPT_PUT) 565f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt memcpy(XTOPT_MKPTR(cb), cb->val.port_range, sizeof(uint16_t) * 566f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt (cb->nvals <= maxiter ? cb->nvals : maxiter)); 567f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt free(lo_arg); 568f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt} 569f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt 570d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt/** 571d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt * Parse an integer and ensure it is within the address family's prefix length 572fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt * limits. The result is stored in @cb->val.hlen. 573d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt */ 574fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardtstatic void xtopt_parse_plen(struct xt_option_call *cb) 575e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt{ 576e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt const struct xt_option_entry *entry = cb->entry; 577fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt unsigned int prefix_len = 128; /* happiness is a warm gcc */ 578e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt 579d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt cb->val.hlen = (afinfo->family == NFPROTO_IPV4) ? 32 : 128; 580d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt if (!xtables_strtoui(cb->arg, NULL, &prefix_len, 0, cb->val.hlen)) 581e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 582e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt "%s: bad value for option \"--%s\", " 583e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt "or out of range (%u-%u).\n", 584d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt cb->ext_name, entry->name, 0, cb->val.hlen); 585e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt 586d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt cb->val.hlen = prefix_len; 587fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt} 588fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt 589fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt/** 590fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt * Reuse xtopt_parse_plen for testing the integer. Afterwards convert this to 591fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt * a bitmask, and make it available through @cb->val.hmask (hlen remains 592fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt * valid). If %XTOPT_PUT is used, hmask will be copied to the target area. 593fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt */ 594fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardtstatic void xtopt_parse_plenmask(struct xt_option_call *cb) 595fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt{ 596fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt const struct xt_option_entry *entry = cb->entry; 597fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt uint32_t *mask = cb->val.hmask.all; 598fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt 599fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt xtopt_parse_plen(cb); 600fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt 601e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt memset(mask, 0xFF, sizeof(union nf_inet_addr)); 602d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt /* This shifting is AF-independent. */ 603fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt if (cb->val.hlen == 0) { 604e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt mask[0] = mask[1] = mask[2] = mask[3] = 0; 605fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt } else if (cb->val.hlen <= 32) { 606fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt mask[0] <<= 32 - cb->val.hlen; 607e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt mask[1] = mask[2] = mask[3] = 0; 608fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt } else if (cb->val.hlen <= 64) { 609fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt mask[1] <<= 32 - (cb->val.hlen - 32); 610e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt mask[2] = mask[3] = 0; 611fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt } else if (cb->val.hlen <= 96) { 612fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt mask[2] <<= 32 - (cb->val.hlen - 64); 613e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt mask[3] = 0; 614fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt } else if (cb->val.hlen <= 128) { 615fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt mask[3] <<= 32 - (cb->val.hlen - 96); 616e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt } 617e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt mask[0] = htonl(mask[0]); 618e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt mask[1] = htonl(mask[1]); 619e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt mask[2] = htonl(mask[2]); 620e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt mask[3] = htonl(mask[3]); 621e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt if (entry->flags & XTOPT_PUT) 622e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt memcpy(XTOPT_MKPTR(cb), mask, sizeof(union nf_inet_addr)); 623e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt} 624e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt 62566266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardtstatic void xtopt_parse_hostmask(struct xt_option_call *cb) 62666266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt{ 62766266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt const char *orig_arg = cb->arg; 62866266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt char *work, *p; 62966266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt 63066266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt if (strchr(cb->arg, '/') == NULL) { 63166266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt xtopt_parse_host(cb); 63266266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt return; 63366266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt } 63466266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt work = strdup(orig_arg); 63566266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt if (work == NULL) 63666266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, "strdup"); 63766266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt p = strchr(work, '/'); /* by def this can't be NULL now */ 63866266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt *p++ = '\0'; 63966266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt /* 64066266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt * Because xtopt_parse_host and xtopt_parse_plenmask would store 64166266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt * different things in the same target area, XTTYPE_HOSTMASK must 64266266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt * disallow XTOPT_PUT, which it does by forcing its absence, 64366266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt * cf. not being listed in xtopt_psize. 64466266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt */ 64566266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt cb->arg = work; 64666266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt xtopt_parse_host(cb); 64766266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt cb->arg = p; 64866266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt xtopt_parse_plenmask(cb); 64966266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt cb->arg = orig_arg; 65066266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt} 65166266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt 652aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtstatic void (*const xtopt_subparse[])(struct xt_option_call *) = { 653dfe99f1bf291b4b954d3608dbe95a43e16a8bb49Jan Engelhardt [XTTYPE_UINT8] = xtopt_parse_int, 6540eff54bd407aae6b99c3b189d356929e399b5a38Jan Engelhardt [XTTYPE_UINT16] = xtopt_parse_int, 655a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt [XTTYPE_UINT32] = xtopt_parse_int, 6568b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt [XTTYPE_UINT64] = xtopt_parse_int, 6578bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt [XTTYPE_UINT8RC] = xtopt_parse_mint, 658564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt [XTTYPE_UINT16RC] = xtopt_parse_mint, 65904bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt [XTTYPE_UINT32RC] = xtopt_parse_mint, 660bc438c4cbdab09fafbbceecddd54e44e4234a4a1Jan Engelhardt [XTTYPE_UINT64RC] = xtopt_parse_mint, 661f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt [XTTYPE_DOUBLE] = xtopt_parse_float, 6624a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt [XTTYPE_STRING] = xtopt_parse_string, 66361cc52b6f9edfa3efb1d0c9ea9531abb42828ec2Jan Engelhardt [XTTYPE_TOSMASK] = xtopt_parse_tosmask, 664d25e217578492d17f7752bf77cfab5f2c2509795Jan Engelhardt [XTTYPE_MARKMASK32] = xtopt_parse_markmask, 66541a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt [XTTYPE_SYSLOGLEVEL] = xtopt_parse_sysloglevel, 666d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt [XTTYPE_HOST] = xtopt_parse_host, 66766266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt [XTTYPE_HOSTMASK] = xtopt_parse_hostmask, 668b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt [XTTYPE_PORT] = xtopt_parse_port, 669b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt [XTTYPE_PORT_NE] = xtopt_parse_port, 670f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt [XTTYPE_PORTRC] = xtopt_parse_mport, 671f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt [XTTYPE_PORTRC_NE] = xtopt_parse_mport, 672fa9b759bacc0ad6a093892ef508811e7feb981b0Jan Engelhardt [XTTYPE_PLEN] = xtopt_parse_plen, 673e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt [XTTYPE_PLENMASK] = xtopt_parse_plenmask, 674aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt}; 675aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 676aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtstatic const size_t xtopt_psize[] = { 677d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt /* 678d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt * All types not listed here, and thus essentially being initialized to 679d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt * zero have zero on purpose. 680d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt */ 681dfe99f1bf291b4b954d3608dbe95a43e16a8bb49Jan Engelhardt [XTTYPE_UINT8] = sizeof(uint8_t), 6820eff54bd407aae6b99c3b189d356929e399b5a38Jan Engelhardt [XTTYPE_UINT16] = sizeof(uint16_t), 683a93142d5f55db74ebd7d49be9bd88f7a499ded40Jan Engelhardt [XTTYPE_UINT32] = sizeof(uint32_t), 6848b5bdea659f1fb86b3288a2568ab104a90b914e5Jan Engelhardt [XTTYPE_UINT64] = sizeof(uint64_t), 6858bf513ada0aae0e4b1ac5160113fc532c2f525d0Jan Engelhardt [XTTYPE_UINT8RC] = sizeof(uint8_t[2]), 686564eaf48e14411803a353206eefbb89d525c63ffJan Engelhardt [XTTYPE_UINT16RC] = sizeof(uint16_t[2]), 68704bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt [XTTYPE_UINT32RC] = sizeof(uint32_t[2]), 688bc438c4cbdab09fafbbceecddd54e44e4234a4a1Jan Engelhardt [XTTYPE_UINT64RC] = sizeof(uint64_t[2]), 689f012b3c9190cd95ac170072f759a97575613ea07Jan Engelhardt [XTTYPE_DOUBLE] = sizeof(double), 6904a0a17620017c1f45946b2cde7139ef18ea3d93cJan Engelhardt [XTTYPE_STRING] = -1, 69141a4cea0f4109fb76762dca073c3c1217658ee06Jan Engelhardt [XTTYPE_SYSLOGLEVEL] = sizeof(uint8_t), 692d7282413763b0ba85d512c1cd49174b762ff449cJan Engelhardt [XTTYPE_HOST] = sizeof(union nf_inet_addr), 69366266abd17adc9631f3769ef0b82968c0bac6f38Jan Engelhardt [XTTYPE_HOSTMASK] = sizeof(union nf_inet_addr), 694b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt [XTTYPE_PORT] = sizeof(uint16_t), 695b8592fa3352018646b0befaa48f930f75c5b7d92Jan Engelhardt [XTTYPE_PORT_NE] = sizeof(uint16_t), 696f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt [XTTYPE_PORTRC] = sizeof(uint16_t[2]), 697f30231a02e145020fb47524f9a0daeb498a4f7d0Jan Engelhardt [XTTYPE_PORTRC_NE] = sizeof(uint16_t[2]), 698e8b42fee7eaa1ba6df203fe0bc4496cae226cbd2Jan Engelhardt [XTTYPE_PLENMASK] = sizeof(union nf_inet_addr), 699aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt}; 700aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 701aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt/** 702aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * The master option parsing routine. May be used for the ".x6_parse" 703aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * function pointer in extensions if fully automatic parsing is desired. 704aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * It may be also called manually from a custom x6_parse function. 705aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 706aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtvoid xtables_option_parse(struct xt_option_call *cb) 707aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt{ 708aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt const struct xt_option_entry *entry = cb->entry; 709aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt unsigned int eflag = 1 << cb->entry->id; 710aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 711aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* 712aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * With {.id = P_FOO, .excl = P_FOO} we can have simple double-use 713aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * prevention. Though it turned out that this is too much typing (most 714aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * of the options are one-time use only), so now we also have 715aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * %XTOPT_MULTI. 716aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 717aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if ((!(entry->flags & XTOPT_MULTI) || (entry->excl & eflag)) && 718aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb->xflags & eflag) 719aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 720aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "%s: option \"--%s\" can only be used once.\n", 721aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb->ext_name, cb->entry->name); 722aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (cb->invert && !(entry->flags & XTOPT_INVERT)) 723aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 724aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "%s: option \"--%s\" cannot be inverted.\n", 725aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb->ext_name, entry->name); 726aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (entry->type != XTTYPE_NONE && optarg == NULL) 727aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 728aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "%s: option \"--%s\" requires an argument.\n", 729aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb->ext_name, entry->name); 730aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (entry->type <= ARRAY_SIZE(xtopt_subparse) && 731aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xtopt_subparse[entry->type] != NULL) 732aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xtopt_subparse[entry->type](cb); 733aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* Exclusion with other flags tested later in finalize. */ 734aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb->xflags |= 1 << entry->id; 735aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt} 736aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 737aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt/** 738aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Verifies that an extension's option map descriptor is valid, and ought to 739aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * be called right after the extension has been loaded, and before option 740aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * merging/xfrm. 741aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 742aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtvoid xtables_option_metavalidate(const char *name, 743aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt const struct xt_option_entry *entry) 744aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt{ 745aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt for (; entry->name != NULL; ++entry) { 746aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (entry->id >= CHAR_BIT * sizeof(unsigned int) || 747aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt entry->id >= XT_OPTION_OFFSET_SCALE) 748aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->exit_err(OTHER_PROBLEM, 749aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "Extension %s uses invalid ID %u\n", 750aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt name, entry->id); 751aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (!(entry->flags & XTOPT_PUT)) 752aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt continue; 753269cbfd30aac18c1fd251be83430dabc60abee0cJan Engelhardt if (entry->type >= ARRAY_SIZE(xtopt_psize) || 754269cbfd30aac18c1fd251be83430dabc60abee0cJan Engelhardt xtopt_psize[entry->type] == 0) 755aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->exit_err(OTHER_PROBLEM, 756aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "%s: entry type of option \"--%s\" cannot be " 757aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "combined with XTOPT_PUT\n", 758aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt name, entry->name); 75904bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt if (xtopt_psize[entry->type] != -1 && 76004bb988275ac76815a15788a7fc75ac78f3bb833Jan Engelhardt xtopt_psize[entry->type] != entry->size) 761aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->exit_err(OTHER_PROBLEM, 762aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "%s: option \"--%s\" points to a memory block " 763aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "of wrong size (expected %zu, got %zu)\n", 764aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt name, entry->name, 765aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xtopt_psize[entry->type], entry->size); 766aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt } 767aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt} 768aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 769aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt/** 770aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Find an option entry by its id. 771aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 772aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtstatic const struct xt_option_entry * 773aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtxtables_option_lookup(const struct xt_option_entry *entry, unsigned int id) 774aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt{ 775aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt for (; entry->name != NULL; ++entry) 776aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (entry->id == id) 777aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt return entry; 778aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt return NULL; 779aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt} 780aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 781aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt/** 782aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @c: getopt id (i.e. with offset) 783aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @fw: struct ipt_entry or ip6t_entry 784aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * 785aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Dispatch arguments to the appropriate parse function, based upon the 786aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * extension's choice of API. 787aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 788aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtvoid xtables_option_tpcall(unsigned int c, char **argv, bool invert, 789aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt struct xtables_target *t, void *fw) 790aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt{ 791aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt struct xt_option_call cb; 792aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 793aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (t->x6_parse == NULL) { 794aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (t->parse != NULL) 795aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt t->parse(c - t->option_offset, argv, invert, 796aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt &t->tflags, fw, &t->t); 797aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt return; 798aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt } 799aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 800aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt c -= t->option_offset; 801aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.entry = xtables_option_lookup(t->x6_options, c); 802aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (cb.entry == NULL) 803aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xtables_error(OTHER_PROBLEM, 804aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "Extension does not know id %u\n", c); 805aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.arg = optarg; 806aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.invert = invert; 807aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.ext_name = t->name; 808aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.data = t->t->data; 809aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.xflags = t->tflags; 81033d180871bea281a448efd0c1a49517318162382Jan Engelhardt cb.target = &t->t; 811aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt t->x6_parse(&cb); 812aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt t->tflags = cb.xflags; 813aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt} 814aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 815aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt/** 816aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @c: getopt id (i.e. with offset) 817aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @fw: struct ipt_entry or ip6t_entry 818aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * 819aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Dispatch arguments to the appropriate parse function, based upon the 820aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * extension's choice of API. 821aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 822aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtvoid xtables_option_mpcall(unsigned int c, char **argv, bool invert, 823aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt struct xtables_match *m, void *fw) 824aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt{ 825aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt struct xt_option_call cb; 826aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 827aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (m->x6_parse == NULL) { 828aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (m->parse != NULL) 829aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt m->parse(c - m->option_offset, argv, invert, 830aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt &m->mflags, fw, &m->m); 831aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt return; 832aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt } 833aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 834aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt c -= m->option_offset; 835aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.entry = xtables_option_lookup(m->x6_options, c); 836aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (cb.entry == NULL) 837aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xtables_error(OTHER_PROBLEM, 838aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "Extension does not know id %u\n", c); 839aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.arg = optarg; 840aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.invert = invert; 841aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.ext_name = m->name; 842aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.data = m->m->data; 843aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt cb.xflags = m->mflags; 84433d180871bea281a448efd0c1a49517318162382Jan Engelhardt cb.match = &m->m; 845aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt m->x6_parse(&cb); 846aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt m->mflags = cb.xflags; 847aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt} 848aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 849aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt/** 850aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @name: name of extension 851aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @entry: current option (from all ext's entries) being validated 852aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @xflags: flags the extension has collected 853aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @i: conflicting option (id) to test for 854aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 855aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtstatic void 856aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtxtables_option_fcheck2(const char *name, const struct xt_option_entry *entry, 857aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt const struct xt_option_entry *other, 858aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt unsigned int xflags) 859aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt{ 860aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt unsigned int ef = 1 << entry->id, of = 1 << other->id; 861aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 862aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (entry->also & of && !(xflags & of)) 863aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 864aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "%s: option \"--%s\" also requires \"--%s\".\n", 865aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt name, entry->name, other->name); 866aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 867aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (!(entry->excl & of)) 868aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* Use of entry does not collide with other option, good. */ 869aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt return; 870aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if ((xflags & (ef | of)) != (ef | of)) 871aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* Conflicting options were not used. */ 872aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt return; 873aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 874aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 875aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "%s: option \"--%s\" cannot be used together with \"--%s\".\n", 876aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt name, entry->name, other->name); 877aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt} 878aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 879aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt/** 880aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @name: name of extension 881aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @xflags: accumulated flags 882aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * @entry: extension's option table 883aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * 884aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Check that all option constraints have been met. This effectively replaces 885aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * ->final_check of the older API. 886aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 887aa37acc1423126f555135935c687eb91995b9440Jan Engelhardtvoid xtables_options_fcheck(const char *name, unsigned int xflags, 888aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt const struct xt_option_entry *table) 889aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt{ 890aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt const struct xt_option_entry *entry, *other; 891aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt unsigned int i; 892aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 893aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt for (entry = table; entry->name != NULL; ++entry) { 894aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (entry->flags & XTOPT_MAND && 895aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt !(xflags & (1 << entry->id))) 896aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 897aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt "%s: option \"--%s\" must be specified\n", 898aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt name, entry->name); 899aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt 900aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt for (i = 0; i < CHAR_BIT * sizeof(entry->id); ++i) { 901aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (entry->id == i) 902aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt /* 903aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * Avoid conflict with self. Multi-use check 904aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt * was done earlier in xtables_option_parse. 905aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt */ 906aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt continue; 907aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt other = xtables_option_lookup(table, i); 908aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt if (other == NULL) 909aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt continue; 910aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt xtables_option_fcheck2(name, entry, other, xflags); 911aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt } 912aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt } 913aa37acc1423126f555135935c687eb91995b9440Jan Engelhardt} 9143af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt 9153af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt/** 9163af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt * Dispatch arguments to the appropriate final_check function, based upon the 9173af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt * extension's choice of API. 9183af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt */ 9193af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardtvoid xtables_option_tfcall(struct xtables_target *t) 9203af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt{ 9213af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt if (t->x6_fcheck != NULL) { 9223af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt struct xt_fcheck_call cb; 9233af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt 9243af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt cb.ext_name = t->name; 9253af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt cb.data = t->t->data; 9263af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt cb.xflags = t->tflags; 9273af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt t->x6_fcheck(&cb); 9283af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt } else if (t->final_check != NULL) { 9293af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt t->final_check(t->tflags); 9303af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt } 9313af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt if (t->x6_options != NULL) 9323af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt xtables_options_fcheck(t->name, t->tflags, t->x6_options); 9333af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt} 9343af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt 9353af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt/** 9363af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt * Dispatch arguments to the appropriate final_check function, based upon the 9373af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt * extension's choice of API. 9383af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt */ 9393af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardtvoid xtables_option_mfcall(struct xtables_match *m) 9403af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt{ 9413af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt if (m->x6_fcheck != NULL) { 9423af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt struct xt_fcheck_call cb; 9433af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt 9443af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt cb.ext_name = m->name; 9453af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt cb.data = m->m->data; 9463af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt cb.xflags = m->mflags; 9473af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt m->x6_fcheck(&cb); 9483af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt } else if (m->final_check != NULL) { 9493af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt m->final_check(m->mflags); 9503af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt } 9513af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt if (m->x6_options != NULL) 9523af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt xtables_options_fcheck(m->name, m->mflags, m->x6_options); 9533af739b0e7c3b6dcc986645c57c982d0add5006bJan Engelhardt} 9542e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 9552e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardtstruct xtables_lmap *xtables_lmap_init(const char *file) 9562e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt{ 9572e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt struct xtables_lmap *lmap_head = NULL, *lmap_prev = NULL, *lmap_this; 9582e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt char buf[512]; 9592e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt FILE *fp; 9602e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt char *cur, *nxt; 9612e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt int id; 9622e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 9632e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt fp = fopen(file, "re"); 9642e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (fp == NULL) 9652e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt return NULL; 9662e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 9672e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt while (fgets(buf, sizeof(buf), fp) != NULL) { 9682e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt cur = buf; 9692e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt while (isspace(*cur)) 9702e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt ++cur; 9712e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (*cur == '#' || *cur == '\n' || *cur == '\0') 9722e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt continue; 9732e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 9742e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt /* iproute2 allows hex and dec format */ 9752e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt errno = 0; 9762e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt id = strtoul(cur, &nxt, strncmp(cur, "0x", 2) == 0 ? 16 : 10); 9772e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (nxt == cur || errno != 0) 9782e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt continue; 9792e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 9802e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt /* same boundaries as in iproute2 */ 9812e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (id < 0 || id > 255) 9822e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt continue; 9832e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt cur = nxt; 9842e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 9852e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (!isspace(*cur)) 9862e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt continue; 9872e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt while (isspace(*cur)) 9882e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt ++cur; 9892e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (*cur == '#' || *cur == '\n' || *cur == '\0') 9902e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt continue; 9912e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt nxt = cur; 9922e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt while (*nxt != '\0' && !isspace(*nxt)) 9932e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt ++nxt; 9942e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (nxt == cur) 9952e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt continue; 9962e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt *nxt = '\0'; 9972e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 9982e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt /* found valid data */ 9992e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt lmap_this = malloc(sizeof(*lmap_this)); 10002e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (lmap_this == NULL) { 10012e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt perror("malloc"); 10022e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt goto out; 10032e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt } 10042e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt lmap_this->id = id; 10052e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt lmap_this->name = strdup(cur); 10062e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (lmap_this->name == NULL) { 10072e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt free(lmap_this); 10082e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt goto out; 10092e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt } 10102e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt lmap_this->next = NULL; 10112e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 10122e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (lmap_prev != NULL) 10132e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt lmap_prev->next = lmap_this; 10142e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt else 10152e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt lmap_head = lmap_this; 10162e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt lmap_prev = lmap_this; 10172e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt } 10182e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 10192e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt fclose(fp); 10202e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt return lmap_head; 10212e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt out: 10222e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt xtables_lmap_free(lmap_head); 10232e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt return NULL; 10242e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt} 10252e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 10262e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardtvoid xtables_lmap_free(struct xtables_lmap *head) 10272e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt{ 10282e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt struct xtables_lmap *next; 10292e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 10302e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt for (; head != NULL; head = next) { 10312e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt next = head->next; 10322e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt free(head->name); 10332e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt free(head); 10342e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt } 10352e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt} 10362e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 10372e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardtint xtables_lmap_name2id(const struct xtables_lmap *head, const char *name) 10382e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt{ 10392e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt for (; head != NULL; head = head->next) 10402e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (strcmp(head->name, name) == 0) 10412e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt return head->id; 10422e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt return -1; 10432e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt} 10442e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt 10452e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardtconst char *xtables_lmap_id2name(const struct xtables_lmap *head, int id) 10462e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt{ 10472e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt for (; head != NULL; head = head->next) 10482e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt if (head->id == id) 10492e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt return head->name; 10502e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt return NULL; 10512e0ec4fa0fb5162c441cd666f55fe76777e40d5eJan Engelhardt} 1052