--- /dev/null
+/*
+ * 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: head/sbin/ipfw/nat.c 187770 2009-01-27 12:01:30Z luigi $
+ *
+ * In-kernel nat support
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+
+#include "ipfw2.h"
+
+#include <ctype.h>
+#include <err.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+
+#define IPFW_INTERNAL /* Access to protected structures in ip_fw.h. */
+
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/route.h> /* def. of struct route */
+#include <netinet/in.h>
+#include <netinet/ip_fw.h>
+#include <arpa/inet.h>
+#include <alias.h>
+
+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 },
+ { "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)
+ errx(1, "%s: cannot get interface address", ifn);
+
+ 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. */
+
+#define INC_ARGCV() do { \
+ (*_av)++; \
+ (*_ac)--; \
+ av = *_av; \
+ ac = *_ac; \
+} while(0)
+
+/*
+ * 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
+setup_redir_addr(char *spool_buf, unsigned int len,
+ int *_ac, char ***_av)
+{
+ char **av, *sep; /* Token separator. */
+ /* Temporary buffer used to hold server pool ip's. */
+ char tmp_spool_buf[NAT_BUF_LEN];
+ int ac, space, lsnat;
+ struct cfg_redir *r;
+ struct cfg_spool *tmp;
+
+ av = *_av;
+ ac = *_ac;
+ space = 0;
+ lsnat = 0;
+ if (len >= SOF_REDIR) {
+ r = (struct cfg_redir *)spool_buf;
+ /* Skip cfg_redir at beginning of buf. */
+ spool_buf = &spool_buf[SOF_REDIR];
+ space = SOF_REDIR;
+ len -= SOF_REDIR;
+ } else
+ goto nospace;
+ r->mode = REDIR_ADDR;
+ /* Extract local address. */
+ if (ac == 0)
+ errx(EX_DATAERR, "redirect_addr: missing local address");
+ sep = strchr(*av, ',');
+ if (sep) { /* LSNAT redirection syntax. */
+ r->laddr.s_addr = INADDR_NONE;
+ /* Preserve av, copy spool servers to tmp_spool_buf. */
+ strncpy(tmp_spool_buf, *av, strlen(*av)+1);
+ lsnat = 1;
+ } else
+ StrToAddr(*av, &r->laddr);
+ INC_ARGCV();
+
+ /* Extract public address. */
+ if (ac == 0)
+ errx(EX_DATAERR, "redirect_addr: missing public address");
+ StrToAddr(*av, &r->paddr);
+ INC_ARGCV();
+
+ /* Setup LSNAT server pool. */
+ if (sep) {
+ sep = strtok(tmp_spool_buf, ",");
+ while (sep != NULL) {
+ tmp = (struct cfg_spool *)spool_buf;
+ if (len < SOF_SPOOL)
+ goto nospace;
+ len -= SOF_SPOOL;
+ space += SOF_SPOOL;
+ StrToAddr(sep, &tmp->addr);
+ tmp->port = ~0;
+ r->spool_cnt++;
+ /* Point to the next possible cfg_spool. */
+ spool_buf = &spool_buf[SOF_SPOOL];
+ sep = strtok(NULL, ",");
+ }
+ }
+ return(space);
+nospace:
+ errx(EX_DATAERR, "redirect_addr: buf is too small\n");
+}
+
+static int
+setup_redir_port(char *spool_buf, unsigned int len,
+ int *_ac, char ***_av)
+{
+ char **av, *sep, *protoName;
+ char tmp_spool_buf[NAT_BUF_LEN];
+ int ac, space, lsnat;
+ struct cfg_redir *r;
+ struct cfg_spool *tmp;
+ u_short numLocalPorts;
+ port_range portRange;
+
+ av = *_av;
+ ac = *_ac;
+ space = 0;
+ lsnat = 0;
+ numLocalPorts = 0;
+
+ if (len >= SOF_REDIR) {
+ r = (struct cfg_redir *)spool_buf;
+ /* Skip cfg_redir at beginning of buf. */
+ spool_buf = &spool_buf[SOF_REDIR];
+ space = SOF_REDIR;
+ len -= SOF_REDIR;
+ } else
+ goto nospace;
+ r->mode = REDIR_PORT;
+ /*
+ * Extract protocol.
+ */
+ if (ac == 0)
+ errx (EX_DATAERR, "redirect_port: missing protocol");
+ r->proto = StrToProto(*av);
+ protoName = *av;
+ INC_ARGCV();
+
+ /*
+ * Extract local address.
+ */
+ if (ac == 0)
+ errx (EX_DATAERR, "redirect_port: missing local address");
+
+ sep = strchr(*av, ',');
+ /* LSNAT redirection syntax. */
+ if (sep) {
+ r->laddr.s_addr = INADDR_NONE;
+ r->lport = ~0;
+ numLocalPorts = 1;
+ /* Preserve av, copy spool servers to tmp_spool_buf. */
+ strncpy(tmp_spool_buf, *av, strlen(*av)+1);
+ lsnat = 1;
+ } 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);
+ }
+ }
+ INC_ARGCV();
+
+ /*
+ * Extract public port and optionally address.
+ */
+ if (ac == 0)
+ errx (EX_DATAERR, "redirect_port: missing public port");
+
+ sep = strchr (*av, ':');
+ if (sep) {
+ 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);
+ INC_ARGCV();
+
+ /*
+ * Extract remote address and optionally port.
+ */
+ /*
+ * NB: isalpha(**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 && !isalpha(**av)) {
+ sep = strchr (*av, ':');
+ if (sep) {
+ 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);
+ }
+ INC_ARGCV();
+ } 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) {
+ sep = strtok(tmp_spool_buf, ",");
+ while (sep != NULL) {
+ tmp = (struct cfg_spool *)spool_buf;
+ if (len < SOF_SPOOL)
+ goto nospace;
+ len -= SOF_SPOOL;
+ space += SOF_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 targetport 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, &tmp->addr);
+ tmp->port = r->pport;
+ }
+ } else {
+ if (StrToAddrAndPortRange(sep, &tmp->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");
+ tmp->port = GETLOPORT(portRange);
+ }
+ r->spool_cnt++;
+ /* Point to the next possible cfg_spool. */
+ spool_buf = &spool_buf[SOF_SPOOL];
+ sep = strtok(NULL, ",");
+ }
+ }
+ return (space);
+nospace:
+ errx(EX_DATAERR, "redirect_port: buf is too small\n");
+}
+
+static int
+setup_redir_proto(char *spool_buf, unsigned int len,
+ int *_ac, char ***_av)
+{
+ char **av;
+ int ac, space;
+ struct protoent *protoent;
+ struct cfg_redir *r;
+
+ av = *_av;
+ ac = *_ac;
+ if (len >= SOF_REDIR) {
+ r = (struct cfg_redir *)spool_buf;
+ /* Skip cfg_redir at beginning of buf. */
+ spool_buf = &spool_buf[SOF_REDIR];
+ space = SOF_REDIR;
+ len -= SOF_REDIR;
+ } else
+ goto nospace;
+ r->mode = REDIR_PROTO;
+ /*
+ * Extract protocol.
+ */
+ if (ac == 0)
+ errx(EX_DATAERR, "redirect_proto: missing protocol");
+
+ protoent = getprotobyname(*av);
+ if (protoent == NULL)
+ errx(EX_DATAERR, "redirect_proto: unknown protocol %s", *av);
+ else
+ r->proto = protoent->p_proto;
+
+ INC_ARGCV();
+
+ /*
+ * Extract local address.
+ */
+ if (ac == 0)
+ errx(EX_DATAERR, "redirect_proto: missing local address");
+ else
+ StrToAddr(*av, &r->laddr);
+
+ INC_ARGCV();
+
+ /*
+ * 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 (!isalpha(**av)) {
+ StrToAddr(*av, &r->paddr);
+ INC_ARGCV();
+
+ /*
+ * Extract optional remote address.
+ */
+ /* see above in setup_redir_port() */
+ if (ac!=0 && !isalpha(**av)) {
+ StrToAddr(*av, &r->raddr);
+ INC_ARGCV();
+ }
+ }
+ }
+ return (space);
+nospace:
+ errx(EX_DATAERR, "redirect_proto: buf is too small\n");
+}
+
+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_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, len, off, tok;
+ char *id, buf[NAT_BUF_LEN]; /* Buffer for serialized data. */
+
+ len = NAT_BUF_LEN;
+ /* Offset in buf: save space for n at the beginning. */
+ off = sizeof(*n);
+ memset(buf, 0, sizeof(buf));
+ n = (struct cfg_nat *)buf;
+
+ av++; ac--;
+ /* Nat id. */
+ if (ac && isdigit(**av)) {
+ id = *av;
+ i = atoi(*av);
+ ac--; av++;
+ n->id = i;
+ } else
+ errx(EX_DATAERR, "missing nat id");
+ if (ac == 0)
+ errx(EX_DATAERR, "missing option");
+
+ 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_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], len, &ac, &av);
+ break;
+ case TOK_REDIR_PORT:
+ i = setup_redir_port(&buf[off], len, &ac, &av);
+ break;
+ case TOK_REDIR_PROTO:
+ i = setup_redir_proto(&buf[off], len, &ac, &av);
+ break;
+ }
+ n->redir_cnt++;
+ off += i;
+ len -= i;
+ break;
+ default:
+ errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]);
+ }
+ }
+
+ 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));
+ }
+ }
+}
git://git.onelab.eu / ipfw.git / blobdiff