/* * Copyright (c) 2014 Yandex LLC * Copyright (c) 2014 Alexander V. Chernikov * * Redistribution and use in source forms, with and without modification, * are permitted provided that this entire comment appears intact. * * Redistribution in binary form may occur without any restrictions. * Obviously, it would be nice if you gave credit where credit is due * but requiring it would be too onerous. * * This software is provided ``AS IS'' without any warranties of any kind. * * in-kernel ipfw tables support. * * $FreeBSD$ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ipfw2.h" static void table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add, int quiet, int update, int atomic); static int table_flush(ipfw_obj_header *oh); static int table_destroy(ipfw_obj_header *oh); static int table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i); static int table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i); static int table_do_swap(ipfw_obj_header *oh, char *second); static void table_create(ipfw_obj_header *oh, int ac, char *av[]); static void table_modify(ipfw_obj_header *oh, int ac, char *av[]); static void table_lookup(ipfw_obj_header *oh, int ac, char *av[]); static void table_lock(ipfw_obj_header *oh, int lock); static int table_swap(ipfw_obj_header *oh, char *second); static int table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i); static int table_show_info(ipfw_xtable_info *i, void *arg); static void table_fill_ntlv(ipfw_obj_ntlv *ntlv, char *name, uint32_t set, uint16_t uidx); static int table_flush_one(ipfw_xtable_info *i, void *arg); static int table_show_one(ipfw_xtable_info *i, void *arg); static int table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh); static void table_show_list(ipfw_obj_header *oh, int need_header); static void table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent); static void tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key, int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi); static void tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *arg, uint8_t type, uint32_t vmask); static void table_show_value(char *buf, size_t bufsize, ipfw_table_value *v, uint32_t vmask, int print_ip); typedef int (table_cb_t)(ipfw_xtable_info *i, void *arg); static int tables_foreach(table_cb_t *f, void *arg, int sort); #ifndef s6_addr32 #define s6_addr32 __u6_addr.__u6_addr32 #endif static struct _s_x tabletypes[] = { { "addr", IPFW_TABLE_ADDR }, { "iface", IPFW_TABLE_INTERFACE }, { "number", IPFW_TABLE_NUMBER }, { "flow", IPFW_TABLE_FLOW }, { NULL, 0 } }; static struct _s_x tablevaltypes[] = { { "skipto", IPFW_VTYPE_SKIPTO }, { "pipe", IPFW_VTYPE_PIPE }, { "fib", IPFW_VTYPE_FIB }, { "nat", IPFW_VTYPE_NAT }, { "dscp", IPFW_VTYPE_DSCP }, { "tag", IPFW_VTYPE_TAG }, { "divert", IPFW_VTYPE_DIVERT }, { "netgraph", IPFW_VTYPE_NETGRAPH }, { "limit", IPFW_VTYPE_LIMIT }, { "ipv4", IPFW_VTYPE_NH4 }, { "ipv6", IPFW_VTYPE_NH6 }, { NULL, 0 } }; static struct _s_x tablecmds[] = { { "add", TOK_ADD }, { "delete", TOK_DEL }, { "create", TOK_CREATE }, { "destroy", TOK_DESTROY }, { "flush", TOK_FLUSH }, { "modify", TOK_MODIFY }, { "swap", TOK_SWAP }, { "info", TOK_INFO }, { "detail", TOK_DETAIL }, { "list", TOK_LIST }, { "lookup", TOK_LOOKUP }, { "atomic", TOK_ATOMIC }, { "lock", TOK_LOCK }, { "unlock", TOK_UNLOCK }, { NULL, 0 } }; static int lookup_host (char *host, struct in_addr *ipaddr) { struct hostent *he; if (!inet_aton(host, ipaddr)) { if ((he = gethostbyname(host)) == NULL) return(-1); *ipaddr = *(struct in_addr *)he->h_addr_list[0]; } return(0); } static int get_token(struct _s_x *table, char *string, char *errbase) { int tcmd; if ((tcmd = match_token_relaxed(table, string)) < 0) errx(EX_USAGE, "%s %s %s", (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); return (tcmd); } /* * This one handles all table-related commands * ipfw table NAME create ... * ipfw table NAME modify ... * ipfw table NAME destroy * ipfw table NAME swap NAME * ipfw table NAME lock * ipfw table NAME unlock * ipfw table NAME add addr[/masklen] [value] * ipfw table NAME add [addr[/masklen] value] [addr[/masklen] value] .. * ipfw table NAME delete addr[/masklen] [addr[/masklen]] .. * ipfw table NAME lookup addr * ipfw table {NAME | all} flush * ipfw table {NAME | all} list * ipfw table {NAME | all} info * ipfw table {NAME | all} detail */ void ipfw_table_handler(int ac, char *av[]) { int do_add, is_all; int atomic, error, tcmd; ipfw_xtable_info i; ipfw_obj_header oh; char *tablename; uint32_t set; void *arg; memset(&oh, 0, sizeof(oh)); is_all = 0; if (co.use_set != 0) set = co.use_set - 1; else set = 0; ac--; av++; NEED1("table needs name"); tablename = *av; if (table_check_name(tablename) == 0) { table_fill_ntlv(&oh.ntlv, *av, set, 1); oh.idx = 1; } else { if (strcmp(tablename, "all") == 0) is_all = 1; else errx(EX_USAGE, "table name %s is invalid", tablename); } ac--; av++; NEED1("table needs command"); tcmd = get_token(tablecmds, *av, "table command"); /* Check if atomic operation was requested */ atomic = 0; if (tcmd == TOK_ATOMIC) { ac--; av++; NEED1("atomic needs command"); tcmd = get_token(tablecmds, *av, "table command"); switch (tcmd) { case TOK_ADD: break; default: errx(EX_USAGE, "atomic is not compatible with %s", *av); } atomic = 1; } switch (tcmd) { case TOK_LIST: case TOK_INFO: case TOK_DETAIL: case TOK_FLUSH: break; default: if (is_all != 0) errx(EX_USAGE, "table name required"); } switch (tcmd) { case TOK_ADD: case TOK_DEL: do_add = **av == 'a'; ac--; av++; table_modify_record(&oh, ac, av, do_add, co.do_quiet, co.do_quiet, atomic); break; case TOK_CREATE: ac--; av++; table_create(&oh, ac, av); break; case TOK_MODIFY: ac--; av++; table_modify(&oh, ac, av); break; case TOK_DESTROY: if (table_destroy(&oh) != 0) err(EX_OSERR, "failed to destroy table %s", tablename); break; case TOK_FLUSH: if (is_all == 0) { if ((error = table_flush(&oh)) != 0) err(EX_OSERR, "failed to flush table %s info", tablename); } else { error = tables_foreach(table_flush_one, &oh, 1); if (error != 0) err(EX_OSERR, "failed to flush tables list"); } break; case TOK_SWAP: ac--; av++; NEED1("second table name required"); table_swap(&oh, *av); break; case TOK_LOCK: case TOK_UNLOCK: table_lock(&oh, (tcmd == TOK_LOCK)); break; case TOK_DETAIL: case TOK_INFO: arg = (tcmd == TOK_DETAIL) ? (void *)1 : NULL; if (is_all == 0) { if ((error = table_get_info(&oh, &i)) != 0) err(EX_OSERR, "failed to request table info"); table_show_info(&i, arg); } else { error = tables_foreach(table_show_info, arg, 1); if (error != 0) err(EX_OSERR, "failed to request tables list"); } break; case TOK_LIST: if (is_all == 0) { ipfw_xtable_info i; if ((error = table_get_info(&oh, &i)) != 0) err(EX_OSERR, "failed to request table info"); table_show_one(&i, NULL); } else { error = tables_foreach(table_show_one, NULL, 1); if (error != 0) err(EX_OSERR, "failed to request tables list"); } break; case TOK_LOOKUP: ac--; av++; table_lookup(&oh, ac, av); break; } } static void table_fill_ntlv(ipfw_obj_ntlv *ntlv, char *name, uint32_t set, uint16_t uidx) { ntlv->head.type = IPFW_TLV_TBL_NAME; ntlv->head.length = sizeof(ipfw_obj_ntlv); ntlv->idx = uidx; ntlv->set = set; strlcpy(ntlv->name, name, sizeof(ntlv->name)); } static void table_fill_objheader(ipfw_obj_header *oh, ipfw_xtable_info *i) { oh->idx = 1; table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); } static struct _s_x tablenewcmds[] = { { "type", TOK_TYPE }, { "valtype", TOK_VALTYPE }, { "algo", TOK_ALGO }, { "limit", TOK_LIMIT }, { "locked", TOK_LOCK }, { NULL, 0 } }; static struct _s_x flowtypecmds[] = { { "src-ip", IPFW_TFFLAG_SRCIP }, { "proto", IPFW_TFFLAG_PROTO }, { "src-port", IPFW_TFFLAG_SRCPORT }, { "dst-ip", IPFW_TFFLAG_DSTIP }, { "dst-port", IPFW_TFFLAG_DSTPORT }, { NULL, 0 } }; int table_parse_type(uint8_t ttype, char *p, uint8_t *tflags) { uint32_t fset, fclear; char *e; /* Parse type options */ switch(ttype) { case IPFW_TABLE_FLOW: fset = fclear = 0; if (fill_flags(flowtypecmds, p, &e, &fset, &fclear) != 0) errx(EX_USAGE, "unable to parse flow option %s", e); *tflags = fset; break; default: return (EX_USAGE); } return (0); } void table_print_type(char *tbuf, size_t size, uint8_t type, uint8_t tflags) { const char *tname; int l; if ((tname = match_value(tabletypes, type)) == NULL) tname = "unknown"; l = snprintf(tbuf, size, "%s", tname); tbuf += l; size -= l; switch(type) { case IPFW_TABLE_FLOW: if (tflags != 0) { *tbuf++ = ':'; l--; print_flags_buffer(tbuf, size, flowtypecmds, tflags); } break; } } /* * Creates new table * * ipfw table NAME create [ type { addr | iface | number | flow } ] * [ algo algoname ] */ static void table_create(ipfw_obj_header *oh, int ac, char *av[]) { ipfw_xtable_info xi; int error, tcmd, val; uint32_t fset, fclear; size_t sz; char *e, *p; char tbuf[128]; sz = sizeof(tbuf); memset(&xi, 0, sizeof(xi)); while (ac > 0) { tcmd = get_token(tablenewcmds, *av, "option"); ac--; av++; switch (tcmd) { case TOK_LIMIT: NEED1("limit value required"); xi.limit = strtol(*av, NULL, 10); ac--; av++; break; case TOK_TYPE: NEED1("table type required"); /* Type may have suboptions after ':' */ if ((p = strchr(*av, ':')) != NULL) *p++ = '\0'; val = match_token(tabletypes, *av); if (val == -1) { concat_tokens(tbuf, sizeof(tbuf), tabletypes, ", "); errx(EX_USAGE, "Unknown tabletype: %s. Supported: %s", *av, tbuf); } xi.type = val; if (p != NULL) { error = table_parse_type(val, p, &xi.tflags); if (error != 0) errx(EX_USAGE, "Unsupported suboptions: %s", p); } ac--; av++; break; case TOK_VALTYPE: NEED1("table value type required"); fset = fclear = 0; val = fill_flags(tablevaltypes, *av, &e, &fset, &fclear); if (val != -1) { xi.vmask = fset; ac--; av++; break; } concat_tokens(tbuf, sizeof(tbuf), tablevaltypes, ", "); errx(EX_USAGE, "Unknown value type: %s. Supported: %s", e, tbuf); break; case TOK_ALGO: NEED1("table algorithm name required"); if (strlen(*av) > sizeof(xi.algoname)) errx(EX_USAGE, "algorithm name too long"); strlcpy(xi.algoname, *av, sizeof(xi.algoname)); ac--; av++; break; case TOK_LOCK: xi.flags |= IPFW_TGFLAGS_LOCKED; break; } } /* Set some defaults to preserve compability */ if (xi.algoname[0] == '\0' && xi.type == 0) xi.type = IPFW_TABLE_ADDR; if (xi.vmask == 0) xi.vmask = IPFW_VTYPE_LEGACY; if ((error = table_do_create(oh, &xi)) != 0) err(EX_OSERR, "Table creation failed"); } /* * Creates new table * * Request: [ ipfw_obj_header ipfw_xtable_info ] * * Returns 0 on success. */ static int table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i) { char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; int error; memcpy(tbuf, oh, sizeof(*oh)); memcpy(tbuf + sizeof(*oh), i, sizeof(*i)); oh = (ipfw_obj_header *)tbuf; error = do_set3(IP_FW_TABLE_XCREATE, &oh->opheader, sizeof(tbuf)); return (error); } /* * Modifies existing table * * ipfw table NAME modify [ limit number ] */ static void table_modify(ipfw_obj_header *oh, int ac, char *av[]) { ipfw_xtable_info xi; int tcmd; size_t sz; char tbuf[128]; sz = sizeof(tbuf); memset(&xi, 0, sizeof(xi)); while (ac > 0) { tcmd = get_token(tablenewcmds, *av, "option"); ac--; av++; switch (tcmd) { case TOK_LIMIT: NEED1("limit value required"); xi.limit = strtol(*av, NULL, 10); xi.mflags |= IPFW_TMFLAGS_LIMIT; ac--; av++; break; default: errx(EX_USAGE, "cmd is not supported for modificatiob"); } } if (table_do_modify(oh, &xi) != 0) err(EX_OSERR, "Table modification failed"); } /* * Modifies existing table. * * Request: [ ipfw_obj_header ipfw_xtable_info ] * * Returns 0 on success. */ static int table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i) { char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; int error; memcpy(tbuf, oh, sizeof(*oh)); memcpy(tbuf + sizeof(*oh), i, sizeof(*i)); oh = (ipfw_obj_header *)tbuf; error = do_set3(IP_FW_TABLE_XMODIFY, &oh->opheader, sizeof(tbuf)); return (error); } /* * Locks or unlocks given table */ static void table_lock(ipfw_obj_header *oh, int lock) { ipfw_xtable_info xi; memset(&xi, 0, sizeof(xi)); xi.mflags |= IPFW_TMFLAGS_LOCK; xi.flags |= (lock != 0) ? IPFW_TGFLAGS_LOCKED : 0; if (table_do_modify(oh, &xi) != 0) err(EX_OSERR, "Table %s failed", lock != 0 ? "lock" : "unlock"); } /* * Destroys given table specified by @oh->ntlv. * Returns 0 on success. */ static int table_destroy(ipfw_obj_header *oh) { if (do_set3(IP_FW_TABLE_XDESTROY, &oh->opheader, sizeof(*oh)) != 0) return (-1); return (0); } /* * Flushes given table specified by @oh->ntlv. * Returns 0 on success. */ static int table_flush(ipfw_obj_header *oh) { if (do_set3(IP_FW_TABLE_XFLUSH, &oh->opheader, sizeof(*oh)) != 0) return (-1); return (0); } static int table_do_swap(ipfw_obj_header *oh, char *second) { char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_ntlv)]; int error; memset(tbuf, 0, sizeof(tbuf)); memcpy(tbuf, oh, sizeof(*oh)); oh = (ipfw_obj_header *)tbuf; table_fill_ntlv((ipfw_obj_ntlv *)(oh + 1), second, oh->ntlv.set, 1); error = do_set3(IP_FW_TABLE_XSWAP, &oh->opheader, sizeof(tbuf)); return (error); } /* * Swaps given table with @second one. */ static int table_swap(ipfw_obj_header *oh, char *second) { int error; if (table_check_name(second) != 0) errx(EX_USAGE, "table name %s is invalid", second); error = table_do_swap(oh, second); switch (error) { case EINVAL: errx(EX_USAGE, "Unable to swap table: check types"); case EFBIG: errx(EX_USAGE, "Unable to swap table: check limits"); } return (0); } /* * Retrieves table in given table specified by @oh->ntlv. * it inside @i. * Returns 0 on success. */ static int table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i) { char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; size_t sz; sz = sizeof(tbuf); memset(tbuf, 0, sizeof(tbuf)); memcpy(tbuf, oh, sizeof(*oh)); oh = (ipfw_obj_header *)tbuf; if (do_get3(IP_FW_TABLE_XINFO, &oh->opheader, &sz) != 0) return (errno); if (sz < sizeof(tbuf)) return (EINVAL); *i = *(ipfw_xtable_info *)(oh + 1); return (0); } static struct _s_x tablealgoclass[] = { { "hash", IPFW_TACLASS_HASH }, { "array", IPFW_TACLASS_ARRAY }, { "radix", IPFW_TACLASS_RADIX }, { NULL, 0 } }; struct ta_cldata { uint8_t taclass; uint8_t spare4; uint16_t itemsize; uint16_t itemsize6; uint32_t size; uint32_t count; }; /* * Print global/per-AF table @i algorithm info. */ static void table_show_tainfo(ipfw_xtable_info *i, struct ta_cldata *d, const char *af, const char *taclass) { switch (d->taclass) { case IPFW_TACLASS_HASH: case IPFW_TACLASS_ARRAY: printf(" %salgorithm %s info\n", af, taclass); if (d->itemsize == d->itemsize6) printf(" size: %u items: %u itemsize: %u\n", d->size, d->count, d->itemsize); else printf(" size: %u items: %u " "itemsize4: %u itemsize6: %u\n", d->size, d->count, d->itemsize, d->itemsize6); break; case IPFW_TACLASS_RADIX: printf(" %salgorithm %s info\n", af, taclass); if (d->itemsize == d->itemsize6) printf(" items: %u itemsize: %u\n", d->count, d->itemsize); else printf(" items: %u " "itemsize4: %u itemsize6: %u\n", d->count, d->itemsize, d->itemsize6); break; default: printf(" algo class: %s\n", taclass); } } static void table_print_valheader(char *buf, size_t bufsize, uint32_t vmask) { if (vmask == IPFW_VTYPE_LEGACY) { snprintf(buf, bufsize, "legacy"); return; } memset(buf, 0, bufsize); print_flags_buffer(buf, bufsize, tablevaltypes, vmask); } /* * Prints table info struct @i in human-readable form. */ static int table_show_info(ipfw_xtable_info *i, void *arg) { const char *vtype; ipfw_ta_tinfo *tainfo; int afdata, afitem; struct ta_cldata d; char ttype[64], tvtype[64]; table_print_type(ttype, sizeof(ttype), i->type, i->tflags); table_print_valheader(tvtype, sizeof(tvtype), i->vmask); printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); if ((i->flags & IPFW_TGFLAGS_LOCKED) != 0) printf(" kindex: %d, type: %s, locked\n", i->kidx, ttype); else printf(" kindex: %d, type: %s\n", i->kidx, ttype); printf(" references: %u, valtype: %s\n", i->refcnt, tvtype); printf(" algorithm: %s\n", i->algoname); printf(" items: %u, size: %u\n", i->count, i->size); if (i->limit > 0) printf(" limit: %u\n", i->limit); /* Print algo-specific info if requested & set */ if (arg == NULL) return (0); if ((i->ta_info.flags & IPFW_TATFLAGS_DATA) == 0) return (0); tainfo = &i->ta_info; afdata = 0; afitem = 0; if (tainfo->flags & IPFW_TATFLAGS_AFDATA) afdata = 1; if (tainfo->flags & IPFW_TATFLAGS_AFITEM) afitem = 1; memset(&d, 0, sizeof(d)); d.taclass = tainfo->taclass4; d.size = tainfo->size4; d.count = tainfo->count4; d.itemsize = tainfo->itemsize4; if (afdata == 0 && afitem != 0) d.itemsize6 = tainfo->itemsize6; else d.itemsize6 = d.itemsize; if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) vtype = "unknown"; if (afdata == 0) { table_show_tainfo(i, &d, "", vtype); } else { table_show_tainfo(i, &d, "IPv4 ", vtype); memset(&d, 0, sizeof(d)); d.taclass = tainfo->taclass6; if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) vtype = "unknown"; d.size = tainfo->size6; d.count = tainfo->count6; d.itemsize = tainfo->itemsize6; d.itemsize6 = d.itemsize; table_show_tainfo(i, &d, "IPv6 ", vtype); } return (0); } /* * Function wrappers which can be used either * as is or as foreach function parameter. */ static int table_show_one(ipfw_xtable_info *i, void *arg) { ipfw_obj_header *oh; int error; if ((error = table_do_get_list(i, &oh)) != 0) { err(EX_OSERR, "Error requesting table %s list", i->tablename); return (error); } table_show_list(oh, 1); free(oh); return (0); } static int table_flush_one(ipfw_xtable_info *i, void *arg) { ipfw_obj_header *oh; oh = (ipfw_obj_header *)arg; table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); return (table_flush(oh)); } static int table_do_modify_record(int cmd, ipfw_obj_header *oh, ipfw_obj_tentry *tent, int count, int atomic) { ipfw_obj_ctlv *ctlv; ipfw_obj_tentry *tent_base; caddr_t pbuf; char xbuf[sizeof(*oh) + sizeof(ipfw_obj_ctlv) + sizeof(*tent)]; int error, i; size_t sz; sz = sizeof(*ctlv) + sizeof(*tent) * count; if (count == 1) { memset(xbuf, 0, sizeof(xbuf)); pbuf = xbuf; } else { if ((pbuf = calloc(1, sizeof(*oh) + sz)) == NULL) return (ENOMEM); } memcpy(pbuf, oh, sizeof(*oh)); oh = (ipfw_obj_header *)pbuf; oh->opheader.version = 1; ctlv = (ipfw_obj_ctlv *)(oh + 1); ctlv->count = count; ctlv->head.length = sz; if (atomic != 0) ctlv->flags |= IPFW_CTF_ATOMIC; tent_base = tent; memcpy(ctlv + 1, tent, sizeof(*tent) * count); tent = (ipfw_obj_tentry *)(ctlv + 1); for (i = 0; i < count; i++, tent++) { tent->head.length = sizeof(ipfw_obj_tentry); tent->idx = oh->idx; } sz += sizeof(*oh); error = do_get3(cmd, &oh->opheader, &sz); tent = (ipfw_obj_tentry *)(ctlv + 1); /* Copy result back to provided buffer */ memcpy(tent_base, ctlv + 1, sizeof(*tent) * count); if (pbuf != xbuf) free(pbuf); return (error); } static void table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add, int quiet, int update, int atomic) { ipfw_obj_tentry *ptent, tent, *tent_buf; ipfw_xtable_info xi; uint8_t type; uint32_t vmask; int cmd, count, error, i, ignored; char *texterr, *etxt, *px; if (ac == 0) errx(EX_USAGE, "address required"); if (add != 0) { cmd = IP_FW_TABLE_XADD; texterr = "Adding record failed"; } else { cmd = IP_FW_TABLE_XDEL; texterr = "Deleting record failed"; } /* * Calculate number of entries: * Assume [key val] x N for add * and * key x N for delete */ count = (add != 0) ? ac / 2 + 1 : ac; if (count <= 1) { /* Adding single entry with/without value */ memset(&tent, 0, sizeof(tent)); tent_buf = &tent; } else { if ((tent_buf = calloc(count, sizeof(tent))) == NULL) errx(EX_OSERR, "Unable to allocate memory for all entries"); } ptent = tent_buf; memset(&xi, 0, sizeof(xi)); count = 0; while (ac > 0) { tentry_fill_key(oh, ptent, *av, add, &type, &vmask, &xi); /* * compability layer: auto-create table if not exists */ if (xi.tablename[0] == '\0') { xi.type = type; xi.vmask = vmask; strlcpy(xi.tablename, oh->ntlv.name, sizeof(xi.tablename)); fprintf(stderr, "DEPRECATED: inserting data info " "non-existent table %s. (auto-created)\n", xi.tablename); table_do_create(oh, &xi); } oh->ntlv.type = type; ac--; av++; if (add != 0 && ac > 0) { tentry_fill_value(oh, ptent, *av, type, vmask); ac--; av++; } if (update != 0) ptent->head.flags |= IPFW_TF_UPDATE; count++; ptent++; } error = table_do_modify_record(cmd, oh, tent_buf, count, atomic); quiet = 0; /* * Compatibility stuff: do not yell on duplicate keys or * failed deletions. */ if (error == 0 || (error == EEXIST && add != 0) || (error == ENOENT && add == 0)) { if (quiet != 0) { if (tent_buf != &tent) free(tent_buf); return; } } /* Report results back */ ptent = tent_buf; for (i = 0; i < count; ptent++, i++) { ignored = 0; switch (ptent->result) { case IPFW_TR_ADDED: px = "added"; break; case IPFW_TR_DELETED: px = "deleted"; break; case IPFW_TR_UPDATED: px = "updated"; break; case IPFW_TR_LIMIT: px = "limit"; ignored = 1; break; case IPFW_TR_ERROR: px = "error"; ignored = 1; break; case IPFW_TR_NOTFOUND: px = "notfound"; ignored = 1; break; case IPFW_TR_EXISTS: px = "exists"; ignored = 1; break; case IPFW_TR_IGNORED: px = "ignored"; ignored = 1; break; default: px = "unknown"; ignored = 1; } if (error != 0 && atomic != 0 && ignored == 0) printf("%s(reverted): ", px); else printf("%s: ", px); table_show_entry(&xi, ptent); } if (tent_buf != &tent) free(tent_buf); if (error == 0) return; /* Get real OS error */ error = errno; /* Try to provide more human-readable error */ switch (error) { case EEXIST: etxt = "record already exists"; break; case EFBIG: etxt = "limit hit"; break; case ESRCH: etxt = "table not found"; break; case ENOENT: etxt = "record not found"; break; case EACCES: etxt = "table is locked"; break; default: etxt = strerror(error); } errx(EX_OSERR, "%s: %s", texterr, etxt); } static int table_do_lookup(ipfw_obj_header *oh, char *key, ipfw_xtable_info *xi, ipfw_obj_tentry *xtent) { char xbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_tentry)]; ipfw_obj_tentry *tent; uint8_t type; uint32_t vmask; size_t sz; memcpy(xbuf, oh, sizeof(*oh)); oh = (ipfw_obj_header *)xbuf; tent = (ipfw_obj_tentry *)(oh + 1); memset(tent, 0, sizeof(*tent)); tent->head.length = sizeof(*tent); tent->idx = 1; tentry_fill_key(oh, tent, key, 0, &type, &vmask, xi); oh->ntlv.type = type; sz = sizeof(xbuf); if (do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz) != 0) return (errno); if (sz < sizeof(xbuf)) return (EINVAL); *xtent = *tent; return (0); } static void table_lookup(ipfw_obj_header *oh, int ac, char *av[]) { ipfw_obj_tentry xtent; ipfw_xtable_info xi; char key[64]; int error; if (ac == 0) errx(EX_USAGE, "address required"); strlcpy(key, *av, sizeof(key)); memset(&xi, 0, sizeof(xi)); error = table_do_lookup(oh, key, &xi, &xtent); switch (error) { case 0: break; case ESRCH: errx(EX_UNAVAILABLE, "Table %s not found", oh->ntlv.name); case ENOENT: errx(EX_UNAVAILABLE, "Entry %s not found", *av); case ENOTSUP: errx(EX_UNAVAILABLE, "Table %s algo does not support " "\"lookup\" method", oh->ntlv.name); default: err(EX_OSERR, "getsockopt(IP_FW_TABLE_XFIND)"); } table_show_entry(&xi, &xtent); } static void tentry_fill_key_type(char *arg, ipfw_obj_tentry *tentry, uint8_t type, uint8_t tflags) { char *p, *pp; int mask, af; struct in6_addr *paddr, tmp; struct tflow_entry *tfe; uint32_t key, *pkey; uint16_t port; struct protoent *pent; struct servent *sent; int masklen; masklen = 0; af = 0; paddr = (struct in6_addr *)&tentry->k; switch (type) { case IPFW_TABLE_ADDR: /* Remove / if exists */ if ((p = strchr(arg, '/')) != NULL) { *p = '\0'; mask = atoi(p + 1); } if (inet_pton(AF_INET, arg, paddr) == 1) { if (p != NULL && mask > 32) errx(EX_DATAERR, "bad IPv4 mask width: %s", p + 1); masklen = p ? mask : 32; af = AF_INET; } else if (inet_pton(AF_INET6, arg, paddr) == 1) { if (IN6_IS_ADDR_V4COMPAT(paddr)) errx(EX_DATAERR, "Use IPv4 instead of v4-compatible"); if (p != NULL && mask > 128) errx(EX_DATAERR, "bad IPv6 mask width: %s", p + 1); masklen = p ? mask : 128; af = AF_INET6; } else { /* Assume FQDN */ if (lookup_host(arg, (struct in_addr *)paddr) != 0) errx(EX_NOHOST, "hostname ``%s'' unknown", arg); masklen = 32; type = IPFW_TABLE_ADDR; af = AF_INET; } break; case IPFW_TABLE_INTERFACE: /* Assume interface name. Copy significant data only */ mask = MIN(strlen(arg), IF_NAMESIZE - 1); memcpy(paddr, arg, mask); /* Set mask to exact match */ masklen = 8 * IF_NAMESIZE; break; case IPFW_TABLE_NUMBER: /* Port or any other key */ key = strtol(arg, &p, 10); if (*p != '\0') errx(EX_DATAERR, "Invalid number: %s", arg); pkey = (uint32_t *)paddr; *pkey = key; masklen = 32; break; case IPFW_TABLE_FLOW: /* Assume [src-ip][,proto][,src-port][,dst-ip][,dst-port] */ tfe = &tentry->k.flow; af = 0; /* Handle */ if ((tflags & IPFW_TFFLAG_SRCIP) != 0) { if ((p = strchr(arg, ',')) != NULL) *p++ = '\0'; /* Determine family using temporary storage */ if (inet_pton(AF_INET, arg, &tmp) == 1) { if (af != 0 && af != AF_INET) errx(EX_DATAERR, "Inconsistent address family\n"); af = AF_INET; memcpy(&tfe->a.a4.sip, &tmp, 4); } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { if (af != 0 && af != AF_INET6) errx(EX_DATAERR, "Inconsistent address family\n"); af = AF_INET6; memcpy(&tfe->a.a6.sip6, &tmp, 16); } arg = p; } /* Handle */ if ((tflags & IPFW_TFFLAG_PROTO) != 0) { if (arg == NULL) errx(EX_DATAERR, "invalid key: proto missing"); if ((p = strchr(arg, ',')) != NULL) *p++ = '\0'; key = strtol(arg, &pp, 10); if (*pp != '\0') { if ((pent = getprotobyname(arg)) == NULL) errx(EX_DATAERR, "Unknown proto: %s", arg); else key = pent->p_proto; } if (key > 255) errx(EX_DATAERR, "Bad protocol number: %u",key); tfe->proto = key; arg = p; } /* Handle */ if ((tflags & IPFW_TFFLAG_SRCPORT) != 0) { if (arg == NULL) errx(EX_DATAERR, "invalid key: src port missing"); if ((p = strchr(arg, ',')) != NULL) *p++ = '\0'; if ((port = htons(strtol(arg, NULL, 10))) == 0) { if ((sent = getservbyname(arg, NULL)) == NULL) errx(EX_DATAERR, "Unknown service: %s", arg); else key = sent->s_port; } tfe->sport = port; arg = p; } /* Handle */ if ((tflags & IPFW_TFFLAG_DSTIP) != 0) { if (arg == NULL) errx(EX_DATAERR, "invalid key: dst ip missing"); if ((p = strchr(arg, ',')) != NULL) *p++ = '\0'; /* Determine family using temporary storage */ if (inet_pton(AF_INET, arg, &tmp) == 1) { if (af != 0 && af != AF_INET) errx(EX_DATAERR, "Inconsistent address family"); af = AF_INET; memcpy(&tfe->a.a4.dip, &tmp, 4); } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { if (af != 0 && af != AF_INET6) errx(EX_DATAERR, "Inconsistent address family"); af = AF_INET6; memcpy(&tfe->a.a6.dip6, &tmp, 16); } arg = p; } /* Handle */ if ((tflags & IPFW_TFFLAG_DSTPORT) != 0) { if (arg == NULL) errx(EX_DATAERR, "invalid key: dst port missing"); if ((p = strchr(arg, ',')) != NULL) *p++ = '\0'; if ((port = htons(strtol(arg, NULL, 10))) == 0) { if ((sent = getservbyname(arg, NULL)) == NULL) errx(EX_DATAERR, "Unknown service: %s", arg); else key = sent->s_port; } tfe->dport = port; arg = p; } tfe->af = af; break; default: errx(EX_DATAERR, "Unsupported table type: %d", type); } tentry->subtype = af; tentry->masklen = masklen; } /* * Tries to guess table key type. * This procedure is used in legacy table auto-create * code AND in `ipfw -n` ruleset checking. * * Imported from old table_fill_xentry() parse code. */ static int guess_key_type(char *key, uint8_t *ptype) { char *p; struct in6_addr addr; uint32_t kv; if (ishexnumber(*key) != 0 || *key == ':') { /* Remove / if exists */ if ((p = strchr(key, '/')) != NULL) *p = '\0'; if ((inet_pton(AF_INET, key, &addr) == 1) || (inet_pton(AF_INET6, key, &addr) == 1)) { *ptype = IPFW_TABLE_CIDR; if (p != NULL) *p = '/'; return (0); } else { /* Port or any other key */ /* Skip non-base 10 entries like 'fa1' */ kv = strtol(key, &p, 10); if (*p == '\0') { *ptype = IPFW_TABLE_NUMBER; return (0); } else if ((p != key) && (*p == '.')) { /* * Warn on IPv4 address strings * which are "valid" for inet_aton() but not * in inet_pton(). * * Typical examples: '10.5' or '10.0.0.05' */ return (1); } } } if (strchr(key, '.') == NULL) { *ptype = IPFW_TABLE_INTERFACE; return (0); } if (lookup_host(key, (struct in_addr *)&addr) != 0) return (1); *ptype = IPFW_TABLE_CIDR; return (0); } static void tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key, int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi) { uint8_t type, tflags; uint32_t vmask; int error; type = 0; tflags = 0; vmask = 0; if (xi->tablename[0] == '\0') error = table_get_info(oh, xi); else error = 0; if (error == 0) { if (co.test_only == 0) { /* Table found */ type = xi->type; tflags = xi->tflags; vmask = xi->vmask; } else { /* * we're running `ipfw -n` * Compability layer: try to guess key type * before failing. */ if (guess_key_type(key, &type) != 0) { /* Inknown key */ errx(EX_USAGE, "Cannot guess " "key '%s' type", key); } vmask = IPFW_VTYPE_LEGACY; } } else { if (error != ESRCH) errx(EX_OSERR, "Error requesting table %s info", oh->ntlv.name); if (add == 0) errx(EX_DATAERR, "Table %s does not exist", oh->ntlv.name); /* * Table does not exist * Compability layer: try to guess key type before failing. */ if (guess_key_type(key, &type) != 0) { /* Inknown key */ errx(EX_USAGE, "Table %s does not exist, cannot guess " "key '%s' type", oh->ntlv.name, key); } vmask = IPFW_VTYPE_LEGACY; } tentry_fill_key_type(key, tent, type, tflags); *ptype = type; *pvmask = vmask; } static void set_legacy_value(uint32_t val, ipfw_table_value *v) { v->tag = val; v->pipe = val; v->divert = val; v->skipto = val; v->netgraph = val; v->fib = val; v->nat = val; v->nh4 = val; v->dscp = (uint8_t)val; v->limit = val; } static void tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *arg, uint8_t type, uint32_t vmask) { struct addrinfo hints, *res; uint32_t a4, flag, val, vm; ipfw_table_value *v; uint32_t i; int dval; char *comma, *e, *etype, *n, *p; v = &tent->v.value; vm = vmask; /* Compat layer: keep old behavior for legacy value types */ if (vmask == IPFW_VTYPE_LEGACY) { /* Try to interpret as number first */ val = strtoul(arg, &p, 0); if (*p == '\0') { set_legacy_value(val, v); return; } if (inet_pton(AF_INET, arg, &val) == 1) { set_legacy_value(ntohl(val), v); return; } /* Try hostname */ if (lookup_host(arg, (struct in_addr *)&val) == 0) { set_legacy_value(val, v); return; } errx(EX_OSERR, "Unable to parse value %s", arg); } /* * Shorthands: handle single value if vmask consists * of numbers only. e.g.: * vmask = "fib,skipto" -> treat input "1" as "1,1" */ n = arg; etype = NULL; for (i = 1; i < (1 << 31); i *= 2) { if ((flag = (vmask & i)) == 0) continue; vmask &= ~flag; if ((comma = strchr(n, ',')) != NULL) *comma = '\0'; switch (flag) { case IPFW_VTYPE_TAG: v->tag = strtol(n, &e, 10); if (*e != '\0') etype = "tag"; break; case IPFW_VTYPE_PIPE: v->pipe = strtol(n, &e, 10); if (*e != '\0') etype = "pipe"; break; case IPFW_VTYPE_DIVERT: v->divert = strtol(n, &e, 10); if (*e != '\0') etype = "divert"; break; case IPFW_VTYPE_SKIPTO: v->skipto = strtol(n, &e, 10); if (*e != '\0') etype = "skipto"; break; case IPFW_VTYPE_NETGRAPH: v->netgraph = strtol(n, &e, 10); if (*e != '\0') etype = "netgraph"; break; case IPFW_VTYPE_FIB: v->fib = strtol(n, &e, 10); if (*e != '\0') etype = "fib"; break; case IPFW_VTYPE_NAT: v->nat = strtol(n, &e, 10); if (*e != '\0') etype = "nat"; break; case IPFW_VTYPE_LIMIT: v->limit = strtol(n, &e, 10); if (*e != '\0') etype = "limit"; break; case IPFW_VTYPE_NH4: if (strchr(n, '.') != NULL && inet_pton(AF_INET, n, &a4) == 1) { v->nh4 = ntohl(a4); break; } if (lookup_host(n, (struct in_addr *)&v->nh4) == 0) break; etype = "ipv4"; break; case IPFW_VTYPE_DSCP: if (isalpha(*n)) { if ((dval = match_token(f_ipdscp, n)) != -1) { v->dscp = dval; break; } else etype = "DSCP code"; } else { v->dscp = strtol(n, &e, 10); if (v->dscp > 63 || *e != '\0') etype = "DSCP value"; } break; case IPFW_VTYPE_NH6: if (strchr(n, ':') != NULL) { memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_INET6; hints.ai_flags = AI_NUMERICHOST; if (getaddrinfo(n, NULL, &hints, &res) == 0) { v->nh6 = ((struct sockaddr_in6 *) res->ai_addr)->sin6_addr; v->zoneid = ((struct sockaddr_in6 *) res->ai_addr)->sin6_scope_id; freeaddrinfo(res); break; } } etype = "ipv6"; break; } if (etype != NULL) errx(EX_USAGE, "Unable to parse %s as %s", n, etype); if (comma != NULL) *comma++ = ','; if ((n = comma) != NULL) continue; /* End of input. */ if (vmask != 0) errx(EX_USAGE, "Not enough fields inside value"); } } /* * Compare table names. * Honor number comparison. */ static int tablename_cmp(const void *a, const void *b) { ipfw_xtable_info *ia, *ib; ia = (ipfw_xtable_info *)a; ib = (ipfw_xtable_info *)b; return (stringnum_cmp(ia->tablename, ib->tablename)); } /* * Retrieves table list from kernel, * optionally sorts it and calls requested function for each table. * Returns 0 on success. */ static int tables_foreach(table_cb_t *f, void *arg, int sort) { ipfw_obj_lheader *olh; ipfw_xtable_info *info; size_t sz; int i, error; /* Start with reasonable default */ sz = sizeof(*olh) + 16 * sizeof(ipfw_xtable_info); for (;;) { if ((olh = calloc(1, sz)) == NULL) return (ENOMEM); olh->size = sz; if (do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz) != 0) { sz = olh->size; free(olh); if (errno != ENOMEM) return (errno); continue; } if (sort != 0) qsort(olh + 1, olh->count, olh->objsize, tablename_cmp); info = (ipfw_xtable_info *)(olh + 1); for (i = 0; i < olh->count; i++) { error = f(info, arg); /* Ignore errors for now */ info = (ipfw_xtable_info *)((caddr_t)info + olh->objsize); } free(olh); break; } return (0); } /* * Retrieves all entries for given table @i in * eXtended format. Allocate buffer large enough * to store result. Called needs to free it later. * * Returns 0 on success. */ static int table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh) { ipfw_obj_header *oh; size_t sz; int c; sz = 0; oh = NULL; for (c = 0; c < 8; c++) { if (sz < i->size) sz = i->size + 44; if (oh != NULL) free(oh); if ((oh = calloc(1, sz)) == NULL) continue; table_fill_objheader(oh, i); oh->opheader.version = 1; /* Current version */ if (do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz) == 0) { *poh = oh; return (0); } if (errno != ENOMEM) break; } free(oh); return (errno); } /* * Shows all entries from @oh in human-readable format */ static void table_show_list(ipfw_obj_header *oh, int need_header) { ipfw_obj_tentry *tent; uint32_t count; ipfw_xtable_info *i; i = (ipfw_xtable_info *)(oh + 1); tent = (ipfw_obj_tentry *)(i + 1); if (need_header) printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); count = i->count; while (count > 0) { table_show_entry(i, tent); tent = (ipfw_obj_tentry *)((caddr_t)tent + tent->head.length); count--; } } static void table_show_value(char *buf, size_t bufsize, ipfw_table_value *v, uint32_t vmask, int print_ip) { char abuf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; struct sockaddr_in6 sa6; uint32_t flag, i, l; size_t sz; struct in_addr a4; sz = bufsize; /* * Some shorthands for printing values: * legacy assumes all values are equal, so keep the first one. */ if (vmask == IPFW_VTYPE_LEGACY) { if (print_ip != 0) { flag = htonl(v->tag); inet_ntop(AF_INET, &flag, buf, sz); } else snprintf(buf, sz, "%u", v->tag); return; } for (i = 1; i < (1 << 31); i *= 2) { if ((flag = (vmask & i)) == 0) continue; l = 0; switch (flag) { case IPFW_VTYPE_TAG: l = snprintf(buf, sz, "%u,", v->tag); break; case IPFW_VTYPE_PIPE: l = snprintf(buf, sz, "%u,", v->pipe); break; case IPFW_VTYPE_DIVERT: l = snprintf(buf, sz, "%d,", v->divert); break; case IPFW_VTYPE_SKIPTO: l = snprintf(buf, sz, "%d,", v->skipto); break; case IPFW_VTYPE_NETGRAPH: l = snprintf(buf, sz, "%u,", v->netgraph); break; case IPFW_VTYPE_FIB: l = snprintf(buf, sz, "%u,", v->fib); break; case IPFW_VTYPE_NAT: l = snprintf(buf, sz, "%u,", v->nat); break; case IPFW_VTYPE_LIMIT: l = snprintf(buf, sz, "%u,", v->limit); break; case IPFW_VTYPE_NH4: a4.s_addr = htonl(v->nh4); inet_ntop(AF_INET, &a4, abuf, sizeof(abuf)); l = snprintf(buf, sz, "%s,", abuf); break; case IPFW_VTYPE_DSCP: l = snprintf(buf, sz, "%d,", v->dscp); break; case IPFW_VTYPE_NH6: sa6.sin6_family = AF_INET6; sa6.sin6_len = sizeof(sa6); sa6.sin6_addr = v->nh6; sa6.sin6_port = 0; sa6.sin6_scope_id = v->zoneid; if (getnameinfo((const struct sockaddr *)&sa6, sa6.sin6_len, abuf, sizeof(abuf), NULL, 0, NI_NUMERICHOST) == 0) l = snprintf(buf, sz, "%s,", abuf); break; } buf += l; sz -= l; } if (sz != bufsize) *(buf - 1) = '\0'; } static void table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent) { char *comma, tbuf[128], pval[128]; void *paddr; struct tflow_entry *tfe; table_show_value(pval, sizeof(pval), &tent->v.value, i->vmask, co.do_value_as_ip); switch (i->type) { case IPFW_TABLE_ADDR: /* IPv4 or IPv6 prefixes */ inet_ntop(tent->subtype, &tent->k, tbuf, sizeof(tbuf)); printf("%s/%u %s\n", tbuf, tent->masklen, pval); break; case IPFW_TABLE_INTERFACE: /* Interface names */ printf("%s %s\n", tent->k.iface, pval); break; case IPFW_TABLE_NUMBER: /* numbers */ printf("%u %s\n", tent->k.key, pval); break; case IPFW_TABLE_FLOW: /* flows */ tfe = &tent->k.flow; comma = ""; if ((i->tflags & IPFW_TFFLAG_SRCIP) != 0) { if (tfe->af == AF_INET) paddr = &tfe->a.a4.sip; else paddr = &tfe->a.a6.sip6; inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); printf("%s%s", comma, tbuf); comma = ","; } if ((i->tflags & IPFW_TFFLAG_PROTO) != 0) { printf("%s%d", comma, tfe->proto); comma = ","; } if ((i->tflags & IPFW_TFFLAG_SRCPORT) != 0) { printf("%s%d", comma, ntohs(tfe->sport)); comma = ","; } if ((i->tflags & IPFW_TFFLAG_DSTIP) != 0) { if (tfe->af == AF_INET) paddr = &tfe->a.a4.dip; else paddr = &tfe->a.a6.dip6; inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); printf("%s%s", comma, tbuf); comma = ","; } if ((i->tflags & IPFW_TFFLAG_DSTPORT) != 0) { printf("%s%d", comma, ntohs(tfe->dport)); comma = ","; } printf(" %s\n", pval); } } static int table_do_get_stdlist(uint16_t opcode, ipfw_obj_lheader **polh) { ipfw_obj_lheader req, *olh; size_t sz; memset(&req, 0, sizeof(req)); sz = sizeof(req); if (do_get3(opcode, &req.opheader, &sz) != 0) if (errno != ENOMEM) return (errno); sz = req.size; if ((olh = calloc(1, sz)) == NULL) return (ENOMEM); olh->size = sz; if (do_get3(opcode, &olh->opheader, &sz) != 0) { free(olh); return (errno); } *polh = olh; return (0); } static int table_do_get_algolist(ipfw_obj_lheader **polh) { return (table_do_get_stdlist(IP_FW_TABLES_ALIST, polh)); } static int table_do_get_vlist(ipfw_obj_lheader **polh) { return (table_do_get_stdlist(IP_FW_TABLE_VLIST, polh)); } void ipfw_list_ta(int ac, char *av[]) { ipfw_obj_lheader *olh; ipfw_ta_info *info; int error, i; const char *atype; error = table_do_get_algolist(&olh); if (error != 0) err(EX_OSERR, "Unable to request algorithm list"); info = (ipfw_ta_info *)(olh + 1); for (i = 0; i < olh->count; i++) { if ((atype = match_value(tabletypes, info->type)) == NULL) atype = "unknown"; printf("--- %s ---\n", info->algoname); printf(" type: %s\n refcount: %u\n", atype, info->refcnt); info = (ipfw_ta_info *)((caddr_t)info + olh->objsize); } free(olh); } /* Copy of current kernel table_value structure */ struct _table_value { uint32_t tag; /* O_TAG/O_TAGGED */ uint32_t pipe; /* O_PIPE/O_QUEUE */ uint16_t divert; /* O_DIVERT/O_TEE */ uint16_t skipto; /* skipto, CALLRET */ uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */ uint32_t fib; /* O_SETFIB */ uint32_t nat; /* O_NAT */ uint32_t nh4; uint8_t dscp; uint8_t spare0; uint16_t spare1; /* -- 32 bytes -- */ struct in6_addr nh6; uint32_t limit; /* O_LIMIT */ uint32_t zoneid; uint64_t refcnt; /* Number of references */ }; int compare_values(const void *_a, const void *_b) { struct _table_value *a, *b; a = (struct _table_value *)_a; b = (struct _table_value *)_b; if (a->spare1 < b->spare1) return (-1); else if (a->spare1 > b->spare1) return (1); return (0); } void ipfw_list_values(int ac, char *av[]) { ipfw_obj_lheader *olh; struct _table_value *v; int error, i; uint32_t vmask; char buf[128]; error = table_do_get_vlist(&olh); if (error != 0) err(EX_OSERR, "Unable to request value list"); vmask = 0x7FFFFFFF; /* Similar to IPFW_VTYPE_LEGACY */ table_print_valheader(buf, sizeof(buf), vmask); printf("HEADER: %s\n", buf); v = (struct _table_value *)(olh + 1); qsort(v, olh->count, olh->objsize, compare_values); for (i = 0; i < olh->count; i++) { table_show_value(buf, sizeof(buf), (ipfw_table_value *)v, vmask, 0); printf("[%u] refs=%lu %s\n", v->spare1, (u_long)v->refcnt, buf); v = (struct _table_value *)((caddr_t)v + olh->objsize); } free(olh); } int table_check_name(char *tablename) { int c, i, l; /* * Check if tablename is null-terminated and contains * valid symbols only. Valid mask is: * [a-zA-Z0-9\-_\.]{1,63} */ l = strlen(tablename); if (l == 0 || l >= 64) return (EINVAL); for (i = 0; i < l; i++) { c = tablename[i]; if (isalpha(c) || isdigit(c) || c == '_' || c == '-' || c == '.') continue; return (EINVAL); } /* Restrict some 'special' names */ if (strcmp(tablename, "all") == 0) return (EINVAL); return (0); }