diff options
Diffstat (limited to 'extensions/libipt_esp.c')
| -rw-r--r-- | extensions/libipt_esp.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/extensions/libipt_esp.c b/extensions/libipt_esp.c deleted file mode 100644 index b675f5b..0000000 --- a/extensions/libipt_esp.c +++ /dev/null @@ -1,193 +0,0 @@ -/* Shared library add-on to iptables to add ESP support. */ -#include <stdio.h> -#include <netdb.h> -#include <string.h> -#include <stdlib.h> -#include <getopt.h> -#include <errno.h> -#include <iptables.h> -#include <linux/netfilter_ipv4/ipt_esp.h> - -/* Function which prints out usage message. */ -static void -help(void) -{ - printf( -"ESP v%s options:\n" -" --espspi [!] spi[:spi]\n" -" match spi (range)\n", -IPTABLES_VERSION); -} - -static struct option opts[] = { - { "espspi", 1, 0, '1' }, - {0} -}; - -static u_int32_t -parse_esp_spi(const char *spistr) -{ - unsigned long int spi; - char* ep; - - spi = strtoul(spistr,&ep,0) ; - - if ( spistr == ep ) { - exit_error(PARAMETER_PROBLEM, - "ESP no valid digits in spi `%s'", spistr); - } - if ( spi == ULONG_MAX && errno == ERANGE ) { - exit_error(PARAMETER_PROBLEM, - "spi `%s' specified too big: would overflow", spistr); - } - if ( *spistr != '\0' && *ep != '\0' ) { - exit_error(PARAMETER_PROBLEM, - "ESP error parsing spi `%s'", spistr); - } - return (u_int32_t) spi; -} - -static void -parse_esp_spis(const char *spistring, u_int32_t *spis) -{ - char *buffer; - char *cp; - - buffer = strdup(spistring); - if ((cp = strchr(buffer, ':')) == NULL) - spis[0] = spis[1] = parse_esp_spi(buffer); - else { - *cp = '\0'; - cp++; - - spis[0] = buffer[0] ? parse_esp_spi(buffer) : 0; - spis[1] = cp[0] ? parse_esp_spi(cp) : 0xFFFFFFFF; - if (spis[0] > spis[1]) - exit_error(PARAMETER_PROBLEM, - "Invalid ESP spi range: %s", spistring); - } - free(buffer); -} - -/* Initialize the match. */ -static void -init(struct xt_entry_match *m, unsigned int *nfcache) -{ - struct ipt_esp *espinfo = (struct ipt_esp *)m->data; - - espinfo->spis[1] = 0xFFFFFFFF; -} - -#define ESP_SPI 0x01 - -/* Function which parses command options; returns true if it - ate an option */ -static int -parse(int c, char **argv, int invert, unsigned int *flags, - const void *entry, - unsigned int *nfcache, - struct xt_entry_match **match) -{ - struct ipt_esp *espinfo = (struct ipt_esp *)(*match)->data; - - switch (c) { - case '1': - if (*flags & ESP_SPI) - exit_error(PARAMETER_PROBLEM, - "Only one `--espspi' allowed"); - check_inverse(optarg, &invert, &optind, 0); - parse_esp_spis(argv[optind-1], espinfo->spis); - if (invert) - espinfo->invflags |= IPT_ESP_INV_SPI; - *flags |= ESP_SPI; - break; - default: - return 0; - } - - return 1; -} - -/* Final check; we don't care. */ -static void -final_check(unsigned int flags) -{ -} - -static void -print_spis(const char *name, u_int32_t min, u_int32_t max, - int invert) -{ - const char *inv = invert ? "!" : ""; - - if (min != 0 || max != 0xFFFFFFFF || invert) { - printf("%s", name); - if (min == max) { - printf(":%s", inv); - printf("%u", min); - } else { - printf("s:%s", inv); - printf("%u",min); - printf(":"); - printf("%u",max); - } - printf(" "); - } -} - -/* Prints out the union ipt_matchinfo. */ -static void -print(const void *ip, - const struct xt_entry_match *match, int numeric) -{ - const struct ipt_esp *esp = (struct ipt_esp *)match->data; - - printf("esp "); - print_spis("spi", esp->spis[0], esp->spis[1], - esp->invflags & IPT_ESP_INV_SPI); - if (esp->invflags & ~IPT_ESP_INV_MASK) - printf("Unknown invflags: 0x%X ", - esp->invflags & ~IPT_ESP_INV_MASK); -} - -/* Saves the union ipt_matchinfo in parsable form to stdout. */ -static void save(const void *ip, const struct xt_entry_match *match) -{ - const struct ipt_esp *espinfo = (struct ipt_esp *)match->data; - - if (!(espinfo->spis[0] == 0 - && espinfo->spis[1] == 0xFFFFFFFF)) { - printf("--espspi %s", - (espinfo->invflags & IPT_ESP_INV_SPI) ? "! " : ""); - if (espinfo->spis[0] - != espinfo->spis[1]) - printf("%u:%u ", - espinfo->spis[0], - espinfo->spis[1]); - else - printf("%u ", - espinfo->spis[0]); - } - -} - -static struct iptables_match esp = { - .next = NULL, - .name = "esp", - .version = IPTABLES_VERSION, - .size = IPT_ALIGN(sizeof(struct ipt_esp)), - .userspacesize = IPT_ALIGN(sizeof(struct ipt_esp)), - .help = &help, - .init = &init, - .parse = &parse, - .final_check = &final_check, - .print = &print, - .save = &save, - .extra_opts = opts -}; - -void -_init(void) -{ - register_match(&esp); -} |