/* * Copyright (c) 2002-2003 Luigi Rizzo * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp * Copyright (c) 1994 Ugen J.S.Antsilevich * * Idea and grammar partially left from: * Copyright (c) 1993 Daniel Boulet * * 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. * * NEW command line interface for IP firewall facility * * $FreeBSD$ * * In-kernel nat support */ #include #include #include #include "ipfw2.h" #include #include #include #include #include #include #include #define IPFW_INTERNAL /* Access to protected structures in ip_fw.h. */ #include #include #include /* def. of struct route */ #include #include #include #include static struct _s_x nat_params[] = { { "ip", TOK_IP }, { "if", TOK_IF }, { "log", TOK_ALOG }, { "deny_in", TOK_DENY_INC }, { "same_ports", TOK_SAME_PORTS }, { "unreg_only", TOK_UNREG_ONLY }, { "skip_global", TOK_SKIP_GLOBAL }, { "reset", TOK_RESET_ADDR }, { "reverse", TOK_ALIAS_REV }, { "proxy_only", TOK_PROXY_ONLY }, { "redirect_addr", TOK_REDIR_ADDR }, { "redirect_port", TOK_REDIR_PORT }, { "redirect_proto", TOK_REDIR_PROTO }, { NULL, 0 } /* terminator */ }; /* * Search for interface with name "ifn", and fill n accordingly: * * n->ip ip address of interface "ifn" * n->if_name copy of interface name "ifn" */ static void set_addr_dynamic(const char *ifn, struct cfg_nat *n) { size_t needed; int mib[6]; char *buf, *lim, *next; struct if_msghdr *ifm; struct ifa_msghdr *ifam; struct sockaddr_dl *sdl; struct sockaddr_in *sin; int ifIndex, ifMTU; mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; mib[3] = AF_INET; mib[4] = NET_RT_IFLIST; mib[5] = 0; /* * Get interface data. */ if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1) err(1, "iflist-sysctl-estimate"); buf = safe_calloc(1, needed); if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) err(1, "iflist-sysctl-get"); lim = buf + needed; /* * Loop through interfaces until one with * given name is found. This is done to * find correct interface index for routing * message processing. */ ifIndex = 0; next = buf; while (next < lim) { ifm = (struct if_msghdr *)next; next += ifm->ifm_msglen; if (ifm->ifm_version != RTM_VERSION) { if (co.verbose) warnx("routing message version %d " "not understood", ifm->ifm_version); continue; } if (ifm->ifm_type == RTM_IFINFO) { sdl = (struct sockaddr_dl *)(ifm + 1); if (strlen(ifn) == sdl->sdl_nlen && strncmp(ifn, sdl->sdl_data, sdl->sdl_nlen) == 0) { ifIndex = ifm->ifm_index; ifMTU = ifm->ifm_data.ifi_mtu; break; } } } if (!ifIndex) errx(1, "unknown interface name %s", ifn); /* * Get interface address. */ sin = NULL; while (next < lim) { ifam = (struct ifa_msghdr *)next; next += ifam->ifam_msglen; if (ifam->ifam_version != RTM_VERSION) { if (co.verbose) warnx("routing message version %d " "not understood", ifam->ifam_version); continue; } if (ifam->ifam_type != RTM_NEWADDR) break; if (ifam->ifam_addrs & RTA_IFA) { int i; char *cp = (char *)(ifam + 1); for (i = 1; i < RTA_IFA; i <<= 1) { if (ifam->ifam_addrs & i) cp += SA_SIZE((struct sockaddr *)cp); } if (((struct sockaddr *)cp)->sa_family == AF_INET) { sin = (struct sockaddr_in *)cp; break; } } } if (sin == NULL) n->ip.s_addr = htonl(INADDR_ANY); else n->ip = sin->sin_addr; strncpy(n->if_name, ifn, IF_NAMESIZE); free(buf); } /* * XXX - The following functions, macros and definitions come from natd.c: * it would be better to move them outside natd.c, in a file * (redirect_support.[ch]?) shared by ipfw and natd, but for now i can live * with it. */ /* * Definition of a port range, and macros to deal with values. * FORMAT: HI 16-bits == first port in range, 0 == all ports. * LO 16-bits == number of ports in range * NOTES: - Port values are not stored in network byte order. */ #define port_range u_long #define GETLOPORT(x) ((x) >> 0x10) #define GETNUMPORTS(x) ((x) & 0x0000ffff) #define GETHIPORT(x) (GETLOPORT((x)) + GETNUMPORTS((x))) /* Set y to be the low-port value in port_range variable x. */ #define SETLOPORT(x,y) ((x) = ((x) & 0x0000ffff) | ((y) << 0x10)) /* Set y to be the number of ports in port_range variable x. */ #define SETNUMPORTS(x,y) ((x) = ((x) & 0xffff0000) | (y)) static void StrToAddr (const char* str, struct in_addr* addr) { struct hostent* hp; if (inet_aton (str, addr)) return; hp = gethostbyname (str); if (!hp) errx (1, "unknown host %s", str); memcpy (addr, hp->h_addr, sizeof (struct in_addr)); } static int StrToPortRange (const char* str, const char* proto, port_range *portRange) { char* sep; struct servent* sp; char* end; u_short loPort; u_short hiPort; /* First see if this is a service, return corresponding port if so. */ sp = getservbyname (str,proto); if (sp) { SETLOPORT(*portRange, ntohs(sp->s_port)); SETNUMPORTS(*portRange, 1); return 0; } /* Not a service, see if it's a single port or port range. */ sep = strchr (str, '-'); if (sep == NULL) { SETLOPORT(*portRange, strtol(str, &end, 10)); if (end != str) { /* Single port. */ SETNUMPORTS(*portRange, 1); return 0; } /* Error in port range field. */ errx (EX_DATAERR, "%s/%s: unknown service", str, proto); } /* Port range, get the values and sanity check. */ sscanf (str, "%hu-%hu", &loPort, &hiPort); SETLOPORT(*portRange, loPort); SETNUMPORTS(*portRange, 0); /* Error by default */ if (loPort <= hiPort) SETNUMPORTS(*portRange, hiPort - loPort + 1); if (GETNUMPORTS(*portRange) == 0) errx (EX_DATAERR, "invalid port range %s", str); return 0; } static int StrToProto (const char* str) { if (!strcmp (str, "tcp")) return IPPROTO_TCP; if (!strcmp (str, "udp")) return IPPROTO_UDP; if (!strcmp (str, "sctp")) return IPPROTO_SCTP; errx (EX_DATAERR, "unknown protocol %s. Expected sctp, tcp or udp", str); } static int StrToAddrAndPortRange (const char* str, struct in_addr* addr, char* proto, port_range *portRange) { char* ptr; ptr = strchr (str, ':'); if (!ptr) errx (EX_DATAERR, "%s is missing port number", str); *ptr = '\0'; ++ptr; StrToAddr (str, addr); return StrToPortRange (ptr, proto, portRange); } /* End of stuff taken from natd.c. */ /* * The next 3 functions add support for the addr, port and proto redirect and * their logic is loosely based on SetupAddressRedirect(), SetupPortRedirect() * and SetupProtoRedirect() from natd.c. * * Every setup_* function fills at least one redirect entry * (struct cfg_redir) and zero or more server pool entry (struct cfg_spool) * in buf. * * The format of data in buf is: * * cfg_nat cfg_redir cfg_spool ...... cfg_spool * * ------------------------------------- ------------ * | | .....X ... | | | | ..... * ------------------------------------- ...... ------------ * ^ * spool_cnt n=0 ...... n=(X-1) * * len points to the amount of available space in buf * space counts the memory consumed by every function * * XXX - Every function get all the argv params so it * has to check, in optional parameters, that the next * args is a valid option for the redir entry and not * another token. Only redir_port and redir_proto are * affected by this. */ static int estimate_redir_addr(int *ac, char ***av) { size_t space = sizeof(struct cfg_redir); char *sep = **av; u_int c = 0; (void)ac; /* UNUSED */ while ((sep = strchr(sep, ',')) != NULL) { c++; sep++; } if (c > 0) c++; space += c * sizeof(struct cfg_spool); return (space); } static int setup_redir_addr(char *buf, int *ac, char ***av) { struct cfg_redir *r; char *sep; size_t space; r = (struct cfg_redir *)buf; r->mode = REDIR_ADDR; /* Skip cfg_redir at beginning of buf. */ buf = &buf[sizeof(struct cfg_redir)]; space = sizeof(struct cfg_redir); /* Extract local address. */ if (strchr(**av, ',') != NULL) { struct cfg_spool *spool; /* Setup LSNAT server pool. */ r->laddr.s_addr = INADDR_NONE; sep = strtok(**av, ","); while (sep != NULL) { spool = (struct cfg_spool *)buf; space += sizeof(struct cfg_spool); StrToAddr(sep, &spool->addr); spool->port = ~0; r->spool_cnt++; /* Point to the next possible cfg_spool. */ buf = &buf[sizeof(struct cfg_spool)]; sep = strtok(NULL, ","); } } else StrToAddr(**av, &r->laddr); (*av)++; (*ac)--; /* Extract public address. */ StrToAddr(**av, &r->paddr); (*av)++; (*ac)--; return (space); } static int estimate_redir_port(int *ac, char ***av) { size_t space = sizeof(struct cfg_redir); char *sep = **av; u_int c = 0; (void)ac; /* UNUSED */ while ((sep = strchr(sep, ',')) != NULL) { c++; sep++; } if (c > 0) c++; space += c * sizeof(struct cfg_spool); return (space); } static int setup_redir_port(char *buf, int *ac, char ***av) { struct cfg_redir *r; char *sep, *protoName, *lsnat = NULL; size_t space; u_short numLocalPorts; port_range portRange; numLocalPorts = 0; r = (struct cfg_redir *)buf; r->mode = REDIR_PORT; /* Skip cfg_redir at beginning of buf. */ buf = &buf[sizeof(struct cfg_redir)]; space = sizeof(struct cfg_redir); /* * Extract protocol. */ r->proto = StrToProto(**av); protoName = **av; (*av)++; (*ac)--; /* * Extract local address. */ if (strchr(**av, ',') != NULL) { r->laddr.s_addr = INADDR_NONE; r->lport = ~0; numLocalPorts = 1; lsnat = **av; } else { /* * The sctp nat does not allow the port numbers to be mapped to * new port numbers. Therefore, no ports are to be specified * in the target port field. */ if (r->proto == IPPROTO_SCTP) { if (strchr(**av, ':')) errx(EX_DATAERR, "redirect_port:" "port numbers do not change in sctp, so do " "not specify them as part of the target"); else StrToAddr(**av, &r->laddr); } else { if (StrToAddrAndPortRange(**av, &r->laddr, protoName, &portRange) != 0) errx(EX_DATAERR, "redirect_port: " "invalid local port range"); r->lport = GETLOPORT(portRange); numLocalPorts = GETNUMPORTS(portRange); } } (*av)++; (*ac)--; /* * Extract public port and optionally address. */ if (strchr(**av, ':') != NULL) { if (StrToAddrAndPortRange(**av, &r->paddr, protoName, &portRange) != 0) errx(EX_DATAERR, "redirect_port: " "invalid public port range"); } else { r->paddr.s_addr = INADDR_ANY; if (StrToPortRange(**av, protoName, &portRange) != 0) errx(EX_DATAERR, "redirect_port: " "invalid public port range"); } r->pport = GETLOPORT(portRange); if (r->proto == IPPROTO_SCTP) { /* so the logic below still works */ numLocalPorts = GETNUMPORTS(portRange); r->lport = r->pport; } r->pport_cnt = GETNUMPORTS(portRange); (*av)++; (*ac)--; /* * Extract remote address and optionally port. */ /* * NB: isdigit(**av) => we've to check that next parameter is really an * option for this redirect entry, else stop here processing arg[cv]. */ if (*ac != 0 && isdigit(***av)) { if (strchr(**av, ':') != NULL) { if (StrToAddrAndPortRange(**av, &r->raddr, protoName, &portRange) != 0) errx(EX_DATAERR, "redirect_port: " "invalid remote port range"); } else { SETLOPORT(portRange, 0); SETNUMPORTS(portRange, 1); StrToAddr(**av, &r->raddr); } (*av)++; (*ac)--; } else { SETLOPORT(portRange, 0); SETNUMPORTS(portRange, 1); r->raddr.s_addr = INADDR_ANY; } r->rport = GETLOPORT(portRange); r->rport_cnt = GETNUMPORTS(portRange); /* * Make sure port ranges match up, then add the redirect ports. */ if (numLocalPorts != r->pport_cnt) errx(EX_DATAERR, "redirect_port: " "port ranges must be equal in size"); /* Remote port range is allowed to be '0' which means all ports. */ if (r->rport_cnt != numLocalPorts && (r->rport_cnt != 1 || r->rport != 0)) errx(EX_DATAERR, "redirect_port: remote port must" "be 0 or equal to local port range in size"); /* Setup LSNAT server pool. */ if (lsnat != NULL) { struct cfg_spool *spool; sep = strtok(lsnat, ","); while (sep != NULL) { spool = (struct cfg_spool *)buf; space += sizeof(struct cfg_spool); /* * The sctp nat does not allow the port numbers to * be mapped to new port numbers. Therefore, no ports * are to be specified in the target port field. */ if (r->proto == IPPROTO_SCTP) { if (strchr (sep, ':')) { errx(EX_DATAERR, "redirect_port:" "port numbers do not change in " "sctp, so do not specify them as " "part of the target"); } else { StrToAddr(sep, &spool->addr); spool->port = r->pport; } } else { if (StrToAddrAndPortRange(sep, &spool->addr, protoName, &portRange) != 0) errx(EX_DATAERR, "redirect_port:" "invalid local port range"); if (GETNUMPORTS(portRange) != 1) errx(EX_DATAERR, "redirect_port: " "local port must be single in " "this context"); spool->port = GETLOPORT(portRange); } r->spool_cnt++; /* Point to the next possible cfg_spool. */ buf = &buf[sizeof(struct cfg_spool)]; sep = strtok(NULL, ","); } } return (space); } static int setup_redir_proto(char *buf, int *ac, char ***av) { struct cfg_redir *r; struct protoent *protoent; size_t space; r = (struct cfg_redir *)buf; r->mode = REDIR_PROTO; /* Skip cfg_redir at beginning of buf. */ buf = &buf[sizeof(struct cfg_redir)]; space = sizeof(struct cfg_redir); /* * Extract protocol. */ protoent = getprotobyname(**av); if (protoent == NULL) errx(EX_DATAERR, "redirect_proto: unknown protocol %s", **av); else r->proto = protoent->p_proto; (*av)++; (*ac)--; /* * Extract local address. */ StrToAddr(**av, &r->laddr); (*av)++; (*ac)--; /* * Extract optional public address. */ if (*ac == 0) { r->paddr.s_addr = INADDR_ANY; r->raddr.s_addr = INADDR_ANY; } else { /* see above in setup_redir_port() */ if (isdigit(***av)) { StrToAddr(**av, &r->paddr); (*av)++; (*ac)--; /* * Extract optional remote address. */ /* see above in setup_redir_port() */ if (*ac != 0 && isdigit(***av)) { StrToAddr(**av, &r->raddr); (*av)++; (*ac)--; } } } return (space); } static void print_nat_config(unsigned char *buf) { struct cfg_nat *n; int i, cnt, flag, off; struct cfg_redir *t; struct cfg_spool *s; struct protoent *p; n = (struct cfg_nat *)buf; flag = 1; off = sizeof(*n); printf("ipfw nat %u config", n->id); if (strlen(n->if_name) != 0) printf(" if %s", n->if_name); else if (n->ip.s_addr != 0) printf(" ip %s", inet_ntoa(n->ip)); while (n->mode != 0) { if (n->mode & PKT_ALIAS_LOG) { printf(" log"); n->mode &= ~PKT_ALIAS_LOG; } else if (n->mode & PKT_ALIAS_DENY_INCOMING) { printf(" deny_in"); n->mode &= ~PKT_ALIAS_DENY_INCOMING; } else if (n->mode & PKT_ALIAS_SAME_PORTS) { printf(" same_ports"); n->mode &= ~PKT_ALIAS_SAME_PORTS; } else if (n->mode & PKT_ALIAS_SKIP_GLOBAL) { printf(" skip_global"); n->mode &= ~PKT_ALIAS_SKIP_GLOBAL; } else if (n->mode & PKT_ALIAS_UNREGISTERED_ONLY) { printf(" unreg_only"); n->mode &= ~PKT_ALIAS_UNREGISTERED_ONLY; } else if (n->mode & PKT_ALIAS_RESET_ON_ADDR_CHANGE) { printf(" reset"); n->mode &= ~PKT_ALIAS_RESET_ON_ADDR_CHANGE; } else if (n->mode & PKT_ALIAS_REVERSE) { printf(" reverse"); n->mode &= ~PKT_ALIAS_REVERSE; } else if (n->mode & PKT_ALIAS_PROXY_ONLY) { printf(" proxy_only"); n->mode &= ~PKT_ALIAS_PROXY_ONLY; } } /* Print all the redirect's data configuration. */ for (cnt = 0; cnt < n->redir_cnt; cnt++) { t = (struct cfg_redir *)&buf[off]; off += SOF_REDIR; switch (t->mode) { case REDIR_ADDR: printf(" redirect_addr"); if (t->spool_cnt == 0) printf(" %s", inet_ntoa(t->laddr)); else for (i = 0; i < t->spool_cnt; i++) { s = (struct cfg_spool *)&buf[off]; if (i) printf(","); else printf(" "); printf("%s", inet_ntoa(s->addr)); off += SOF_SPOOL; } printf(" %s", inet_ntoa(t->paddr)); break; case REDIR_PORT: p = getprotobynumber(t->proto); printf(" redirect_port %s ", p->p_name); if (!t->spool_cnt) { printf("%s:%u", inet_ntoa(t->laddr), t->lport); if (t->pport_cnt > 1) printf("-%u", t->lport + t->pport_cnt - 1); } else for (i=0; i < t->spool_cnt; i++) { s = (struct cfg_spool *)&buf[off]; if (i) printf(","); printf("%s:%u", inet_ntoa(s->addr), s->port); off += SOF_SPOOL; } printf(" "); if (t->paddr.s_addr) printf("%s:", inet_ntoa(t->paddr)); printf("%u", t->pport); if (!t->spool_cnt && t->pport_cnt > 1) printf("-%u", t->pport + t->pport_cnt - 1); if (t->raddr.s_addr) { printf(" %s", inet_ntoa(t->raddr)); if (t->rport) { printf(":%u", t->rport); if (!t->spool_cnt && t->rport_cnt > 1) printf("-%u", t->rport + t->rport_cnt - 1); } } break; case REDIR_PROTO: p = getprotobynumber(t->proto); printf(" redirect_proto %s %s", p->p_name, inet_ntoa(t->laddr)); if (t->paddr.s_addr != 0) { printf(" %s", inet_ntoa(t->paddr)); if (t->raddr.s_addr) printf(" %s", inet_ntoa(t->raddr)); } break; default: errx(EX_DATAERR, "unknown redir mode"); break; } } printf("\n"); } void ipfw_config_nat(int ac, char **av) { struct cfg_nat *n; /* Nat instance configuration. */ int i, off, tok, ac1; char *id, *buf, **av1, *end; size_t len; av++; ac--; /* Nat id. */ if (ac == 0) errx(EX_DATAERR, "missing nat id"); id = *av; i = (int)strtol(id, &end, 0); if (i <= 0 || *end != '\0') errx(EX_DATAERR, "illegal nat id: %s", id); av++; ac--; if (ac == 0) errx(EX_DATAERR, "missing option"); len = sizeof(struct cfg_nat); ac1 = ac; av1 = av; while (ac1 > 0) { tok = match_token(nat_params, *av1); ac1--; av1++; switch (tok) { case TOK_IP: case TOK_IF: ac1--; av1++; break; case TOK_ALOG: case TOK_DENY_INC: case TOK_SAME_PORTS: case TOK_SKIP_GLOBAL: case TOK_UNREG_ONLY: case TOK_RESET_ADDR: case TOK_ALIAS_REV: case TOK_PROXY_ONLY: break; case TOK_REDIR_ADDR: if (ac1 < 2) errx(EX_DATAERR, "redirect_addr: " "not enough arguments"); len += estimate_redir_addr(&ac1, &av1); av1 += 2; ac1 -= 2; break; case TOK_REDIR_PORT: if (ac1 < 3) errx(EX_DATAERR, "redirect_port: " "not enough arguments"); av1++; ac1--; len += estimate_redir_port(&ac1, &av1); av1 += 2; ac1 -= 2; /* Skip optional remoteIP/port */ if (ac1 != 0 && isdigit(**av1)) { av1++; ac1--; } break; case TOK_REDIR_PROTO: if (ac1 < 2) errx(EX_DATAERR, "redirect_proto: " "not enough arguments"); len += sizeof(struct cfg_redir); av1 += 2; ac1 -= 2; /* Skip optional remoteIP/port */ if (ac1 != 0 && isdigit(**av1)) { av1++; ac1--; } if (ac1 != 0 && isdigit(**av1)) { av1++; ac1--; } break; default: errx(EX_DATAERR, "unrecognised option ``%s''", av1[-1]); } } if ((buf = malloc(len)) == NULL) errx(EX_OSERR, "malloc failed"); /* Offset in buf: save space for n at the beginning. */ off = sizeof(*n); memset(buf, 0, len); n = (struct cfg_nat *)buf; n->id = i; while (ac > 0) { tok = match_token(nat_params, *av); ac--; av++; switch (tok) { case TOK_IP: if (ac == 0) errx(EX_DATAERR, "missing option"); if (!inet_aton(av[0], &(n->ip))) errx(EX_DATAERR, "bad ip address ``%s''", av[0]); ac--; av++; break; case TOK_IF: if (ac == 0) errx(EX_DATAERR, "missing option"); set_addr_dynamic(av[0], n); ac--; av++; break; case TOK_ALOG: n->mode |= PKT_ALIAS_LOG; break; case TOK_DENY_INC: n->mode |= PKT_ALIAS_DENY_INCOMING; break; case TOK_SAME_PORTS: n->mode |= PKT_ALIAS_SAME_PORTS; break; case TOK_UNREG_ONLY: n->mode |= PKT_ALIAS_UNREGISTERED_ONLY; break; case TOK_SKIP_GLOBAL: n->mode |= PKT_ALIAS_SKIP_GLOBAL; break; case TOK_RESET_ADDR: n->mode |= PKT_ALIAS_RESET_ON_ADDR_CHANGE; break; case TOK_ALIAS_REV: n->mode |= PKT_ALIAS_REVERSE; break; case TOK_PROXY_ONLY: n->mode |= PKT_ALIAS_PROXY_ONLY; break; /* * All the setup_redir_* functions work directly in * the final buffer, see above for details. */ case TOK_REDIR_ADDR: case TOK_REDIR_PORT: case TOK_REDIR_PROTO: switch (tok) { case TOK_REDIR_ADDR: i = setup_redir_addr(&buf[off], &ac, &av); break; case TOK_REDIR_PORT: i = setup_redir_port(&buf[off], &ac, &av); break; case TOK_REDIR_PROTO: i = setup_redir_proto(&buf[off], &ac, &av); break; } n->redir_cnt++; off += i; break; } } i = do_cmd(IP_FW_NAT_CFG, buf, off); if (i) err(1, "setsockopt(%s)", "IP_FW_NAT_CFG"); if (!co.do_quiet) { /* After every modification, we show the resultant rule. */ int _ac = 3; const char *_av[] = {"show", "config", id}; ipfw_show_nat(_ac, (char **)(void *)_av); } } void ipfw_show_nat(int ac, char **av) { struct cfg_nat *n; struct cfg_redir *e; int cmd, i, nbytes, do_cfg, do_rule, frule, lrule, nalloc, size; int nat_cnt, redir_cnt, r; uint8_t *data, *p; char *endptr; do_rule = 0; nalloc = 1024; size = 0; data = NULL; frule = 0; lrule = IPFW_DEFAULT_RULE; /* max ipfw rule number */ ac--; av++; if (co.test_only) return; /* Parse parameters. */ for (cmd = IP_FW_NAT_GET_LOG, do_cfg = 0; ac != 0; ac--, av++) { if (!strncmp(av[0], "config", strlen(av[0]))) { cmd = IP_FW_NAT_GET_CONFIG, do_cfg = 1; continue; } /* Convert command line rule #. */ frule = lrule = strtoul(av[0], &endptr, 10); if (*endptr == '-') lrule = strtoul(endptr+1, &endptr, 10); if (lrule == 0) err(EX_USAGE, "invalid rule number: %s", av[0]); do_rule = 1; } nbytes = nalloc; while (nbytes >= nalloc) { nalloc = nalloc * 2; nbytes = nalloc; data = safe_realloc(data, nbytes); if (do_cmd(cmd, data, (uintptr_t)&nbytes) < 0) err(EX_OSERR, "getsockopt(IP_FW_GET_%s)", (cmd == IP_FW_NAT_GET_LOG) ? "LOG" : "CONFIG"); } if (nbytes == 0) exit(0); if (do_cfg) { nat_cnt = *((int *)data); for (i = sizeof(nat_cnt); nat_cnt; nat_cnt--) { n = (struct cfg_nat *)&data[i]; if (frule <= n->id && lrule >= n->id) print_nat_config(&data[i]); i += sizeof(struct cfg_nat); for (redir_cnt = 0; redir_cnt < n->redir_cnt; redir_cnt++) { e = (struct cfg_redir *)&data[i]; i += sizeof(struct cfg_redir) + e->spool_cnt * sizeof(struct cfg_spool); } } } else { for (i = 0; 1; i += LIBALIAS_BUF_SIZE + sizeof(int)) { p = &data[i]; if (p == data + nbytes) break; bcopy(p, &r, sizeof(int)); if (do_rule) { if (!(frule <= r && lrule >= r)) continue; } printf("nat %u: %s\n", r, p+sizeof(int)); } } }