diff options
Diffstat (limited to 'iptables-save.c')
| -rw-r--r-- | iptables-save.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/iptables-save.c b/iptables-save.c index e8bdda2b..ecccac47 100644 --- a/iptables-save.c +++ b/iptables-save.c @@ -31,211 +31,6 @@ static const struct option options[] = { {NULL}, }; -#define IP_PARTS_NATIVE(n) \ -(unsigned int)((n)>>24)&0xFF, \ -(unsigned int)((n)>>16)&0xFF, \ -(unsigned int)((n)>>8)&0xFF, \ -(unsigned int)((n)&0xFF) - -#define IP_PARTS(n) IP_PARTS_NATIVE(ntohl(n)) - -/* This assumes that mask is contiguous, and byte-bounded. */ -static void -print_iface(char letter, const char *iface, const unsigned char *mask, - int invert) -{ - unsigned int i; - - if (mask[0] == 0) - return; - - printf("-%c %s", letter, invert ? "! " : ""); - - for (i = 0; i < IFNAMSIZ; i++) { - if (mask[i] != 0) { - if (iface[i] != '\0') - printf("%c", iface[i]); - } else { - /* we can access iface[i-1] here, because - * a few lines above we make sure that mask[0] != 0 */ - if (iface[i-1] != '\0') - printf("+"); - break; - } - } - - printf(" "); -} - -/* These are hardcoded backups in iptables.c, so they are safe */ -struct pprot { - char *name; - u_int8_t num; -}; - -/* FIXME: why don't we use /etc/protocols ? */ -static const struct pprot chain_protos[] = { - { "tcp", IPPROTO_TCP }, - { "udp", IPPROTO_UDP }, - { "icmp", IPPROTO_ICMP }, - { "esp", IPPROTO_ESP }, - { "ah", IPPROTO_AH }, - { "sctp", IPPROTO_SCTP }, -}; - -static void print_proto(u_int16_t proto, int invert) -{ - if (proto) { - unsigned int i; - const char *invertstr = invert ? "! " : ""; - - struct protoent *pent = getprotobynumber(proto); - if (pent) { - printf("-p %s%s ", invertstr, pent->p_name); - return; - } - - for (i = 0; i < sizeof(chain_protos)/sizeof(struct pprot); i++) - if (chain_protos[i].num == proto) { - printf("-p %s%s ", - invertstr, chain_protos[i].name); - return; - } - - printf("-p %s%u ", invertstr, proto); - } -} - -static int print_match(const struct ipt_entry_match *e, - const struct ipt_ip *ip) -{ - struct xtables_match *match - = find_match(e->u.user.name, TRY_LOAD, NULL); - - if (match) { - printf("-m %s ", e->u.user.name); - - /* some matches don't provide a save function */ - if (match->save) - match->save(ip, e); - } else { - if (e->u.match_size) { - fprintf(stderr, - "Can't find library for match `%s'\n", - e->u.user.name); - exit(1); - } - } - return 0; -} - -/* print a given ip including mask if neccessary */ -static void print_ip(char *prefix, u_int32_t ip, u_int32_t mask, int invert) -{ - u_int32_t bits, hmask = ntohl(mask); - int i; - - if (!mask && !ip && !invert) - return; - - printf("%s %s%u.%u.%u.%u", - prefix, - invert ? "! " : "", - IP_PARTS(ip)); - - if (mask == 0xFFFFFFFFU) { - printf("/32 "); - return; - } - - i = 32; - bits = 0xFFFFFFFEU; - while (--i >= 0 && hmask != bits) - bits <<= 1; - if (i >= 0) - printf("/%u ", i); - else - printf("/%u.%u.%u.%u ", IP_PARTS(mask)); -} - -/* We want this to be readable, so only print out neccessary fields. - * Because that's the kind of world I want to live in. */ -static void print_rule(const struct ipt_entry *e, - iptc_handle_t *h, const char *chain, int counters) -{ - struct ipt_entry_target *t; - const char *target_name; - - /* print counters */ - if (counters) - printf("[%llu:%llu] ", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt); - - /* print chain name */ - printf("-A %s ", chain); - - /* Print IP part. */ - print_ip("-s", e->ip.src.s_addr,e->ip.smsk.s_addr, - e->ip.invflags & IPT_INV_SRCIP); - - print_ip("-d", e->ip.dst.s_addr, e->ip.dmsk.s_addr, - e->ip.invflags & IPT_INV_DSTIP); - - print_iface('i', e->ip.iniface, e->ip.iniface_mask, - e->ip.invflags & IPT_INV_VIA_IN); - - print_iface('o', e->ip.outiface, e->ip.outiface_mask, - e->ip.invflags & IPT_INV_VIA_OUT); - - print_proto(e->ip.proto, e->ip.invflags & IPT_INV_PROTO); - - if (e->ip.flags & IPT_F_FRAG) - printf("%s-f ", - e->ip.invflags & IPT_INV_FRAG ? "! " : ""); - - /* Print matchinfo part */ - if (e->target_offset) { - IPT_MATCH_ITERATE(e, print_match, &e->ip); - } - - /* Print target name */ - target_name = iptc_get_target(e, h); - if (target_name && (*target_name != '\0')) -#ifdef IPT_F_GOTO - printf("-%c %s ", e->ip.flags & IPT_F_GOTO ? 'g' : 'j', target_name); -#else - printf("-j %s ", target_name); -#endif - - /* Print targinfo part */ - t = ipt_get_target((struct ipt_entry *)e); - if (t->u.user.name[0]) { - struct xtables_target *target - = find_target(t->u.user.name, TRY_LOAD); - - if (!target) { - fprintf(stderr, "Can't find library for target `%s'\n", - t->u.user.name); - exit(1); - } - - if (target->save) - target->save(&e->ip, t); - else { - /* If the target size is greater than ipt_entry_target - * there is something to be saved, we just don't know - * how to print it */ - if (t->u.target_size != - sizeof(struct ipt_entry_target)) { - fprintf(stderr, "Target `%s' is missing " - "save function\n", - t->u.user.name); - exit(1); - } - } - } - printf("\n"); -} - /* Debugging prototype. */ static int for_each_table(int (*func)(const char *tablename)) { |