Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 1 | /* Code to restore the iptables state, from file by iptables-save. |
| 2 | * (C) 2000 by Harald Welte <laforge@gnumonks.org> |
| 3 | * based on previous code from Rusty Russell <rusty@linuxcare.com.au> |
| 4 | * |
| 5 | * This coude is distributed under the terms of GNU GPL |
Harald Welte | ccd49e5 | 2001-01-23 22:54:34 +0000 | [diff] [blame] | 6 | * |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 7 | * $Id: iptables-restore.c,v 1.9 2001/02/26 17:31:20 laforge Exp $ |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 10 | #include <getopt.h> |
| 11 | #include <sys/errno.h> |
| 12 | #include <string.h> |
| 13 | #include <stdio.h> |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 14 | #include <stdlib.h> |
| 15 | #include "iptables.h" |
| 16 | #include "libiptc/libiptc.h" |
| 17 | |
| 18 | #ifdef DEBUG |
Harald Welte | c45c315 | 2000-12-06 08:11:24 +0000 | [diff] [blame] | 19 | #define DEBUGP(x, args...) fprintf(stderr, x, ## args) |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 20 | #else |
Harald Welte | c45c315 | 2000-12-06 08:11:24 +0000 | [diff] [blame] | 21 | #define DEBUGP(x, args...) |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 22 | #endif |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 23 | |
Harald Welte | a9d2708 | 2000-12-19 16:10:42 +0000 | [diff] [blame] | 24 | static int binary = 0, counters = 0, verbose = 0, noflush = 0; |
| 25 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 26 | /* Keeping track of external matches and targets. */ |
| 27 | static struct option options[] = { |
Harald Welte | a9d2708 | 2000-12-19 16:10:42 +0000 | [diff] [blame] | 28 | { "binary", 0, 0, 'b' }, |
| 29 | { "counters", 0, 0, 'c' }, |
| 30 | /* { "verbose", 1, 0, 'v' }, */ |
| 31 | { "help", 0, 0, 'h' }, |
| 32 | { "noflush", 0, 0, 'n'}, |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 33 | { 0 } |
| 34 | }; |
| 35 | |
| 36 | static void print_usage(const char *name, const char *version) __attribute__((noreturn)); |
| 37 | |
| 38 | static void print_usage(const char *name, const char *version) |
| 39 | { |
Harald Welte | a9d2708 | 2000-12-19 16:10:42 +0000 | [diff] [blame] | 40 | fprintf(stderr, "Usage: %s [-b] [-c] [-v] [-h]\n" |
| 41 | " [ --binary ]\n" |
| 42 | " [ --counters ]\n" |
| 43 | " [ --verbose ]\n" |
| 44 | " [ --help ]\n" |
| 45 | " [ --noflush ]\n", name); |
| 46 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 47 | exit(1); |
| 48 | } |
| 49 | |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 50 | iptc_handle_t create_handle(const char *tablename) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 51 | { |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 52 | iptc_handle_t handle; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 53 | |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 54 | handle = iptc_init(tablename); |
| 55 | if (!handle) { |
| 56 | exit_error(PARAMETER_PROBLEM, "%s: unable to initialize" |
| 57 | "table '%s'\n", program_name, tablename); |
| 58 | exit(1); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 59 | } |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 60 | return handle; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 61 | } |
| 62 | |
Harald Welte | d8e6563 | 2001-01-05 15:20:07 +0000 | [diff] [blame] | 63 | int parse_counters(char *string, struct ipt_counters *ctr) |
| 64 | { |
| 65 | return (sscanf(string, "[%llu:%llu]", &ctr->pcnt, &ctr->bcnt) == 2); |
| 66 | } |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 67 | |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 68 | /* global new argv and argc */ |
| 69 | static char* newargv[1024]; |
| 70 | static int newargc; |
| 71 | |
| 72 | /* function adding one argument to newargv, updating newargc |
| 73 | * returns true if argument added, false otherwise */ |
| 74 | static int add_argv(char *what) { |
| 75 | if (what && ((newargc + 1) < sizeof(newargv)/sizeof(char *))) { |
| 76 | newargv[newargc] = what; |
| 77 | newargc++; |
| 78 | return 1; |
| 79 | } else |
| 80 | return 0; |
| 81 | } |
| 82 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 83 | int main(int argc, char *argv[]) |
| 84 | { |
| 85 | iptc_handle_t handle; |
| 86 | char buffer[10240]; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 87 | unsigned int line = 0; |
Harald Welte | a9d2708 | 2000-12-19 16:10:42 +0000 | [diff] [blame] | 88 | int c; |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 89 | char curtable[IPT_TABLE_MAXNAMELEN + 1]; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 90 | FILE *in; |
| 91 | |
| 92 | program_name = "iptables-restore"; |
| 93 | program_version = NETFILTER_VERSION; |
| 94 | |
Harald Welte | a9d2708 | 2000-12-19 16:10:42 +0000 | [diff] [blame] | 95 | while ((c = getopt_long(argc, argv, "bcvhn", options, NULL)) != -1) { |
| 96 | switch (c) { |
| 97 | case 'b': |
| 98 | binary = 1; |
| 99 | break; |
| 100 | case 'c': |
| 101 | counters = 1; |
| 102 | break; |
| 103 | case 'h': |
| 104 | print_usage("iptables-restore", |
| 105 | NETFILTER_VERSION); |
| 106 | break; |
| 107 | case 'n': |
| 108 | noflush = 1; |
| 109 | break; |
| 110 | } |
| 111 | } |
| 112 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 113 | if (optind == argc - 1) { |
| 114 | in = fopen(argv[optind], "r"); |
| 115 | if (!in) { |
| 116 | fprintf(stderr, "Can't open %s: %s", argv[optind], |
| 117 | strerror(errno)); |
| 118 | exit(1); |
| 119 | } |
| 120 | } |
| 121 | else if (optind < argc) { |
| 122 | fprintf(stderr, "Unknown arguments found on commandline"); |
| 123 | exit(1); |
| 124 | } |
| 125 | else in = stdin; |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 126 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 127 | /* Grab standard input. */ |
| 128 | while (fgets(buffer, sizeof(buffer), in)) { |
| 129 | int ret; |
| 130 | |
| 131 | line++; |
| 132 | if (buffer[0] == '\n') continue; |
| 133 | else if (buffer[0] == '#') { |
| 134 | if (verbose) fputs(buffer, stdout); |
| 135 | continue; |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 136 | } else if (strcmp(buffer, "COMMIT\n") == 0) { |
| 137 | DEBUGP("Calling commit\n"); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 138 | ret = iptc_commit(&handle); |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 139 | } else if (buffer[0] == '*') { |
| 140 | /* New table */ |
| 141 | char *table; |
| 142 | |
| 143 | table = strtok(buffer+1, " \t\n"); |
| 144 | DEBUGP("line %u, table '%s'\n", line, table); |
| 145 | if (!table) { |
| 146 | exit_error(PARAMETER_PROBLEM, |
| 147 | "%s: line %u table name invalid\n", |
| 148 | program_name, line); |
| 149 | exit(1); |
| 150 | } |
| 151 | strncpy(curtable, table, IPT_TABLE_MAXNAMELEN); |
| 152 | |
| 153 | handle = create_handle(table); |
Harald Welte | a9d2708 | 2000-12-19 16:10:42 +0000 | [diff] [blame] | 154 | if (noflush == 0) { |
| 155 | DEBUGP("Cleaning all chains of table '%s'\n", |
| 156 | table); |
| 157 | for_each_chain(flush_entries, verbose, 1, |
| 158 | &handle); |
| 159 | |
| 160 | DEBUGP("Deleting all user-defined chains " |
| 161 | "of table '%s'\n", table); |
| 162 | for_each_chain(delete_chain, verbose, 0, |
| 163 | &handle) ; |
| 164 | } |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 165 | |
| 166 | ret = 1; |
| 167 | |
| 168 | } else if (buffer[0] == ':') { |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 169 | /* New chain. */ |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 170 | char *policy, *chain; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 171 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 172 | chain = strtok(buffer+1, " \t\n"); |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 173 | DEBUGP("line %u, chain '%s'\n", line, chain); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 174 | if (!chain) { |
| 175 | exit_error(PARAMETER_PROBLEM, |
| 176 | "%s: line %u chain name invalid\n", |
| 177 | program_name, line); |
| 178 | exit(1); |
| 179 | } |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 180 | |
Rusty Russell | 5df9bda | 2001-01-07 06:51:00 +0000 | [diff] [blame] | 181 | /* FIXME: abort if chain creation fails --RR */ |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 182 | if (!iptc_builtin(chain, handle)) { |
| 183 | DEBUGP("Creating new chain '%s'\n", chain); |
| 184 | if (!iptc_create_chain(chain, &handle)) |
| 185 | DEBUGP("unable to create chain '%s':%s\n", chain, |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 186 | strerror(errno)); |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 187 | } |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 188 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 189 | policy = strtok(NULL, " \t\n"); |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 190 | DEBUGP("line %u, policy '%s'\n", line, policy); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 191 | if (!policy) { |
| 192 | exit_error(PARAMETER_PROBLEM, |
| 193 | "%s: line %u policy invalid\n", |
| 194 | program_name, line); |
| 195 | exit(1); |
| 196 | } |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 197 | |
| 198 | if (strcmp(policy, "-") != 0) { |
Harald Welte | d8e6563 | 2001-01-05 15:20:07 +0000 | [diff] [blame] | 199 | struct ipt_counters count; |
| 200 | |
| 201 | if (counters) { |
| 202 | char *ctrs; |
| 203 | ctrs = strtok(NULL, " \t\n"); |
| 204 | |
| 205 | parse_counters(ctrs, &count); |
| 206 | |
| 207 | } else { |
| 208 | memset(&count, 0, |
| 209 | sizeof(struct ipt_counters)); |
| 210 | } |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 211 | |
| 212 | DEBUGP("Setting policy of chain %s to %s\n", |
| 213 | chain, policy); |
| 214 | |
Harald Welte | d8e6563 | 2001-01-05 15:20:07 +0000 | [diff] [blame] | 215 | if (!iptc_set_policy(chain, policy, &count, |
| 216 | &handle)) |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 217 | exit_error(OTHER_PROBLEM, |
| 218 | "Can't set policy `%s'" |
| 219 | " on `%s' line %u: %s\n", |
| 220 | chain, policy, line, |
| 221 | iptc_strerror(errno)); |
| 222 | } |
| 223 | |
| 224 | ret = 1; |
| 225 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 226 | } else { |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 227 | int a; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 228 | char *ptr = buffer; |
Harald Welte | ccd49e5 | 2001-01-23 22:54:34 +0000 | [diff] [blame] | 229 | char *pcnt = NULL; |
| 230 | char *bcnt = NULL; |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 231 | char *parsestart; |
| 232 | |
| 233 | /* reset the newargv */ |
| 234 | newargc = 0; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 235 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 236 | if (buffer[0] == '[') { |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 237 | /* we have counters in our input */ |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 238 | ptr = strchr(buffer, ']'); |
| 239 | if (!ptr) |
| 240 | exit_error(PARAMETER_PROBLEM, |
| 241 | "Bad line %u: need ]\n", |
| 242 | line); |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 243 | |
Harald Welte | ccd49e5 | 2001-01-23 22:54:34 +0000 | [diff] [blame] | 244 | pcnt = strtok(buffer+1, ":"); |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 245 | if (!pcnt) |
| 246 | exit_error(PARAMETER_PROBLEM, |
| 247 | "Bad line %u: need :\n", |
| 248 | line); |
| 249 | |
Harald Welte | ccd49e5 | 2001-01-23 22:54:34 +0000 | [diff] [blame] | 250 | bcnt = strtok(NULL, "]"); |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 251 | if (!bcnt) |
| 252 | exit_error(PARAMETER_PROBLEM, |
| 253 | "Bad line %u: need ]\n", |
| 254 | line); |
| 255 | |
| 256 | /* start command parsing after counter */ |
| 257 | parsestart = ptr + 1; |
| 258 | } else { |
| 259 | /* start command parsing at start of line */ |
| 260 | parsestart = buffer; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 261 | } |
Rusty Russell | 7e53bf9 | 2000-03-20 07:03:28 +0000 | [diff] [blame] | 262 | |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 263 | add_argv(argv[0]); |
| 264 | add_argv("-t"); |
| 265 | add_argv((char *) &curtable); |
| 266 | |
Harald Welte | ccd49e5 | 2001-01-23 22:54:34 +0000 | [diff] [blame] | 267 | if (counters && pcnt && bcnt) { |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 268 | add_argv("--set-counters"); |
| 269 | add_argv((char *) pcnt); |
| 270 | add_argv((char *) bcnt); |
Harald Welte | ccd49e5 | 2001-01-23 22:54:34 +0000 | [diff] [blame] | 271 | } |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 272 | |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 273 | /* parse till end of line */ |
| 274 | if (add_argv(strtok(parsestart, " \t\n"))) { |
| 275 | while (add_argv(strtok(NULL, " \t\n"))); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 276 | } |
| 277 | |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 278 | DEBUGP("===>calling do_command(%u, argv, &%s, handle):\n", |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 279 | newargc, curtable); |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 280 | |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 281 | for (a = 0; a <= newargc; a++) |
Harald Welte | ae1ff9f | 2000-12-01 14:26:20 +0000 | [diff] [blame] | 282 | DEBUGP("argv[%u]: %s\n", a, newargv[a]); |
| 283 | |
Harald Welte | 9f7fa49 | 2001-03-15 15:12:02 +0000 | [diff] [blame^] | 284 | ret = do_command(newargc, newargv, &newargv[2], &handle); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 285 | } |
| 286 | if (!ret) { |
| 287 | fprintf(stderr, "%s: line %u failed\n", |
| 288 | program_name, line); |
| 289 | exit(1); |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | return 0; |
| 294 | } |