+++ /dev/null
-/* Shared library add-on to iptables to add byte tracking support. */
-#include <stdio.h>
-#include <netdb.h>
-#include <string.h>
-#include <stdlib.h>
-#include <getopt.h>
-#include <xtables.h>
-#include <linux/netfilter/nf_conntrack_common.h>
-#include <linux/netfilter/xt_connbytes.h>
-
-/* Function which prints out usage message. */
-static void connbytes_help(void)
-{
- printf(
-"connbytes match options:\n"
-" [!] --connbytes from:[to]\n"
-" --connbytes-dir [original, reply, both]\n"
-" --connbytes-mode [packets, bytes, avgpkt]\n");
-}
-
-static const struct option connbytes_opts[] = {
- { "connbytes", 1, NULL, '1' },
- { "connbytes-dir", 1, NULL, '2' },
- { "connbytes-mode", 1, NULL, '3' },
- { .name = NULL }
-};
-
-static void
-parse_range(const char *arg, struct xt_connbytes_info *si)
-{
- char *colon,*p;
-
- si->count.from = strtoul(arg,&colon,10);
- if (*colon != ':')
- exit_error(PARAMETER_PROBLEM, "Bad range `%s'", arg);
- si->count.to = strtoul(colon+1,&p,10);
- if (p == colon+1) {
- /* second number omited */
- si->count.to = 0xffffffff;
- }
- if (si->count.from > si->count.to)
- exit_error(PARAMETER_PROBLEM, "%llu should be less than %llu",
- (unsigned long long)si->count.from,
- (unsigned long long)si->count.to);
-}
-
-/* Function which parses command options; returns true if it
- ate an option */
-static int
-connbytes_parse(int c, char **argv, int invert, unsigned int *flags,
- const void *entry, struct xt_entry_match **match)
-{
- struct xt_connbytes_info *sinfo = (struct xt_connbytes_info *)(*match)->data;
- unsigned long i;
-
- switch (c) {
- case '1':
- if (check_inverse(optarg, &invert, &optind, 0))
- optind++;
-
- parse_range(argv[optind-1], sinfo);
- if (invert) {
- i = sinfo->count.from;
- sinfo->count.from = sinfo->count.to;
- sinfo->count.to = i;
- }
- *flags |= 1;
- break;
- case '2':
- if (!strcmp(optarg, "original"))
- sinfo->direction = XT_CONNBYTES_DIR_ORIGINAL;
- else if (!strcmp(optarg, "reply"))
- sinfo->direction = XT_CONNBYTES_DIR_REPLY;
- else if (!strcmp(optarg, "both"))
- sinfo->direction = XT_CONNBYTES_DIR_BOTH;
- else
- exit_error(PARAMETER_PROBLEM,
- "Unknown --connbytes-dir `%s'", optarg);
-
- *flags |= 2;
- break;
- case '3':
- if (!strcmp(optarg, "packets"))
- sinfo->what = XT_CONNBYTES_PKTS;
- else if (!strcmp(optarg, "bytes"))
- sinfo->what = XT_CONNBYTES_BYTES;
- else if (!strcmp(optarg, "avgpkt"))
- sinfo->what = XT_CONNBYTES_AVGPKT;
- else
- exit_error(PARAMETER_PROBLEM,
- "Unknown --connbytes-mode `%s'", optarg);
- *flags |= 4;
- break;
- default:
- return 0;
- }
-
- return 1;
-}
-
-static void connbytes_check(unsigned int flags)
-{
- if (flags != 7)
- exit_error(PARAMETER_PROBLEM, "You must specify `--connbytes'"
- "`--connbytes-dir' and `--connbytes-mode'");
-}
-
-static void print_mode(struct xt_connbytes_info *sinfo)
-{
- switch (sinfo->what) {
- case XT_CONNBYTES_PKTS:
- fputs("packets ", stdout);
- break;
- case XT_CONNBYTES_BYTES:
- fputs("bytes ", stdout);
- break;
- case XT_CONNBYTES_AVGPKT:
- fputs("avgpkt ", stdout);
- break;
- default:
- fputs("unknown ", stdout);
- break;
- }
-}
-
-static void print_direction(struct xt_connbytes_info *sinfo)
-{
- switch (sinfo->direction) {
- case XT_CONNBYTES_DIR_ORIGINAL:
- fputs("original ", stdout);
- break;
- case XT_CONNBYTES_DIR_REPLY:
- fputs("reply ", stdout);
- break;
- case XT_CONNBYTES_DIR_BOTH:
- fputs("both ", stdout);
- break;
- default:
- fputs("unknown ", stdout);
- break;
- }
-}
-
-/* Prints out the matchinfo. */
-static void
-connbytes_print(const void *ip, const struct xt_entry_match *match, int numeric)
-{
- struct xt_connbytes_info *sinfo = (struct xt_connbytes_info *)match->data;
-
- if (sinfo->count.from > sinfo->count.to)
- printf("connbytes ! %llu:%llu ",
- (unsigned long long)sinfo->count.to,
- (unsigned long long)sinfo->count.from);
- else
- printf("connbytes %llu:%llu ",
- (unsigned long long)sinfo->count.from,
- (unsigned long long)sinfo->count.to);
-
- fputs("connbytes mode ", stdout);
- print_mode(sinfo);
-
- fputs("connbytes direction ", stdout);
- print_direction(sinfo);
-}
-
-/* Saves the matchinfo in parsable form to stdout. */
-static void connbytes_save(const void *ip, const struct xt_entry_match *match)
-{
- struct xt_connbytes_info *sinfo = (struct xt_connbytes_info *)match->data;
-
- if (sinfo->count.from > sinfo->count.to)
- printf("! --connbytes %llu:%llu ",
- (unsigned long long)sinfo->count.to,
- (unsigned long long)sinfo->count.from);
- else
- printf("--connbytes %llu:%llu ",
- (unsigned long long)sinfo->count.from,
- (unsigned long long)sinfo->count.to);
-
- fputs("--connbytes-mode ", stdout);
- print_mode(sinfo);
-
- fputs("--connbytes-dir ", stdout);
- print_direction(sinfo);
-}
-
-static struct xtables_match connbytes_match = {
- .family = AF_INET,
- .name = "connbytes",
- .version = XTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_connbytes_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_connbytes_info)),
- .help = connbytes_help,
- .parse = connbytes_parse,
- .final_check = connbytes_check,
- .print = connbytes_print,
- .save = connbytes_save,
- .extra_opts = connbytes_opts,
-};
-
-static struct xtables_match connbytes_match6 = {
- .family = AF_INET6,
- .name = "connbytes",
- .version = XTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_connbytes_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_connbytes_info)),
- .help = connbytes_help,
- .parse = connbytes_parse,
- .final_check = connbytes_check,
- .print = connbytes_print,
- .save = connbytes_save,
- .extra_opts = connbytes_opts,
-};
-
-void _init(void)
-{
- xtables_register_match(&connbytes_match);
- xtables_register_match(&connbytes_match6);
-}
git://git.onelab.eu / iptables.git / blobdiff