+++ /dev/null
-/*
- * iprule.c "ip rule".
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
- *
- *
- * Changes:
- *
- * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <fcntl.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#include <arpa/inet.h>
-#include <string.h>
-
-#include "rt_names.h"
-#include "utils.h"
-
-extern struct rtnl_handle rth;
-
-static void usage(void) __attribute__((noreturn));
-
-static void usage(void)
-{
- fprintf(stderr, "Usage: ip rule [ list | add | del | flush ] SELECTOR ACTION\n");
- fprintf(stderr, "SELECTOR := [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK ]\n");
- fprintf(stderr, " [ dev STRING ] [ pref NUMBER ]\n");
- fprintf(stderr, "ACTION := [ table TABLE_ID ]\n");
- fprintf(stderr, " [ prohibit | reject | unreachable ]\n");
- fprintf(stderr, " [ realms [SRCREALM/]DSTREALM ]\n");
- fprintf(stderr, "TABLE_ID := [ local | main | default | NUMBER ]\n");
- exit(-1);
-}
-
-static int print_rule(const struct sockaddr_nl *who, struct nlmsghdr *n,
- void *arg)
-{
- FILE *fp = (FILE*)arg;
- struct rtmsg *r = NLMSG_DATA(n);
- int len = n->nlmsg_len;
- int host_len = -1;
- struct rtattr * tb[RTA_MAX+1];
- char abuf[256];
- SPRINT_BUF(b1);
-
- if (n->nlmsg_type != RTM_NEWRULE)
- return 0;
-
- len -= NLMSG_LENGTH(sizeof(*r));
- if (len < 0)
- return -1;
-
- parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
-
- if (r->rtm_family == AF_INET)
- host_len = 32;
- else if (r->rtm_family == AF_INET6)
- host_len = 128;
- else if (r->rtm_family == AF_DECnet)
- host_len = 16;
- else if (r->rtm_family == AF_IPX)
- host_len = 80;
-
- if (tb[RTA_PRIORITY])
- fprintf(fp, "%u:\t", *(unsigned*)RTA_DATA(tb[RTA_PRIORITY]));
- else
- fprintf(fp, "0:\t");
-
- if (tb[RTA_SRC]) {
- if (r->rtm_src_len != host_len) {
- fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_SRC]),
- RTA_DATA(tb[RTA_SRC]),
- abuf, sizeof(abuf)),
- r->rtm_src_len
- );
- } else {
- fprintf(fp, "from %s ", format_host(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_SRC]),
- RTA_DATA(tb[RTA_SRC]),
- abuf, sizeof(abuf))
- );
- }
- } else if (r->rtm_src_len) {
- fprintf(fp, "from 0/%d ", r->rtm_src_len);
- } else {
- fprintf(fp, "from all ");
- }
-
- if (tb[RTA_DST]) {
- if (r->rtm_dst_len != host_len) {
- fprintf(fp, "to %s/%u ", rt_addr_n2a(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_DST]),
- RTA_DATA(tb[RTA_DST]),
- abuf, sizeof(abuf)),
- r->rtm_dst_len
- );
- } else {
- fprintf(fp, "to %s ", format_host(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_DST]),
- RTA_DATA(tb[RTA_DST]),
- abuf, sizeof(abuf)));
- }
- } else if (r->rtm_dst_len) {
- fprintf(fp, "to 0/%d ", r->rtm_dst_len);
- }
-
- if (r->rtm_tos) {
- SPRINT_BUF(b1);
- fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
- }
- if (tb[RTA_PROTOINFO]) {
- fprintf(fp, "fwmark %#x ", *(__u32*)RTA_DATA(tb[RTA_PROTOINFO]));
- }
-
- if (tb[RTA_IIF]) {
- fprintf(fp, "iif %s ", (char*)RTA_DATA(tb[RTA_IIF]));
- }
-
- if (r->rtm_table)
- fprintf(fp, "lookup %s ", rtnl_rttable_n2a(r->rtm_table, b1, sizeof(b1)));
-
- if (tb[RTA_FLOW]) {
- __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
- __u32 from = to>>16;
- to &= 0xFFFF;
- if (from) {
- fprintf(fp, "realms %s/",
- rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
- }
- fprintf(fp, "%s ",
- rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
- }
-
- if (r->rtm_type == RTN_NAT) {
- if (tb[RTA_GATEWAY]) {
- fprintf(fp, "map-to %s ",
- format_host(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_GATEWAY]),
- RTA_DATA(tb[RTA_GATEWAY]),
- abuf, sizeof(abuf)));
- } else
- fprintf(fp, "masquerade");
- } else if (r->rtm_type != RTN_UNICAST)
- fprintf(fp, "%s", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
-
- fprintf(fp, "\n");
- fflush(fp);
- return 0;
-}
-
-static int iprule_list(int argc, char **argv)
-{
- int af = preferred_family;
-
- if (af == AF_UNSPEC)
- af = AF_INET;
-
- if (argc > 0) {
- fprintf(stderr, "\"ip rule show\" does not take any arguments.\n");
- return -1;
- }
-
- if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
- perror("Cannot send dump request");
- return 1;
- }
-
- if (rtnl_dump_filter(&rth, print_rule, stdout, NULL, NULL) < 0) {
- fprintf(stderr, "Dump terminated\n");
- return 1;
- }
-
- return 0;
-}
-
-
-static int iprule_modify(int cmd, int argc, char **argv)
-{
- int table_ok = 0;
- struct {
- struct nlmsghdr n;
- struct rtmsg r;
- char buf[1024];
- } req;
-
- memset(&req, 0, sizeof(req));
-
- req.n.nlmsg_type = cmd;
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
- req.n.nlmsg_flags = NLM_F_REQUEST;
- req.r.rtm_family = preferred_family;
- req.r.rtm_protocol = RTPROT_BOOT;
- req.r.rtm_scope = RT_SCOPE_UNIVERSE;
- req.r.rtm_table = 0;
- req.r.rtm_type = RTN_UNSPEC;
-
- if (cmd == RTM_NEWRULE) {
- req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
- req.r.rtm_type = RTN_UNICAST;
- }
-
- while (argc > 0) {
- if (strcmp(*argv, "from") == 0) {
- inet_prefix dst;
- NEXT_ARG();
- get_prefix(&dst, *argv, req.r.rtm_family);
- req.r.rtm_src_len = dst.bitlen;
- addattr_l(&req.n, sizeof(req), RTA_SRC, &dst.data, dst.bytelen);
- } else if (strcmp(*argv, "to") == 0) {
- inet_prefix dst;
- NEXT_ARG();
- get_prefix(&dst, *argv, req.r.rtm_family);
- req.r.rtm_dst_len = dst.bitlen;
- addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
- } else if (matches(*argv, "preference") == 0 ||
- matches(*argv, "order") == 0 ||
- matches(*argv, "priority") == 0) {
- __u32 pref;
- NEXT_ARG();
- if (get_u32(&pref, *argv, 0))
- invarg("preference value is invalid\n", *argv);
- addattr32(&req.n, sizeof(req), RTA_PRIORITY, pref);
- } else if (strcmp(*argv, "tos") == 0) {
- __u32 tos;
- NEXT_ARG();
- if (rtnl_dsfield_a2n(&tos, *argv))
- invarg("TOS value is invalid\n", *argv);
- req.r.rtm_tos = tos;
- } else if (strcmp(*argv, "fwmark") == 0) {
- __u32 fwmark;
- NEXT_ARG();
- if (get_u32(&fwmark, *argv, 0))
- invarg("fwmark value is invalid\n", *argv);
- addattr32(&req.n, sizeof(req), RTA_PROTOINFO, fwmark);
- } else if (matches(*argv, "realms") == 0) {
- __u32 realm;
- NEXT_ARG();
- if (get_rt_realms(&realm, *argv))
- invarg("invalid realms\n", *argv);
- addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
- } else if (matches(*argv, "table") == 0 ||
- strcmp(*argv, "lookup") == 0) {
- __u32 tid;
- NEXT_ARG();
- if (rtnl_rttable_a2n(&tid, *argv))
- invarg("invalid table ID\n", *argv);
- req.r.rtm_table = tid;
- table_ok = 1;
- } else if (strcmp(*argv, "dev") == 0 ||
- strcmp(*argv, "iif") == 0) {
- NEXT_ARG();
- addattr_l(&req.n, sizeof(req), RTA_IIF, *argv, strlen(*argv)+1);
- } else if (strcmp(*argv, "nat") == 0 ||
- matches(*argv, "map-to") == 0) {
- NEXT_ARG();
- fprintf(stderr, "Warning: route NAT is deprecated\n");
- addattr32(&req.n, sizeof(req), RTA_GATEWAY, get_addr32(*argv));
- req.r.rtm_type = RTN_NAT;
- } else {
- int type;
-
- if (strcmp(*argv, "type") == 0) {
- NEXT_ARG();
- }
- if (matches(*argv, "help") == 0)
- usage();
- if (rtnl_rtntype_a2n(&type, *argv))
- invarg("Failed to parse rule type", *argv);
- req.r.rtm_type = type;
- }
- argc--;
- argv++;
- }
-
- if (req.r.rtm_family == AF_UNSPEC)
- req.r.rtm_family = AF_INET;
-
- if (!table_ok && cmd == RTM_NEWRULE)
- req.r.rtm_table = RT_TABLE_MAIN;
-
- if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
- return 2;
-
- return 0;
-}
-
-
-static int flush_rule(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
-{
- struct rtnl_handle rth2;
- struct rtmsg *r = NLMSG_DATA(n);
- int len = n->nlmsg_len;
- struct rtattr * tb[RTA_MAX+1];
-
- len -= NLMSG_LENGTH(sizeof(*r));
- if (len < 0)
- return -1;
-
- parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
-
- if (tb[RTA_PRIORITY]) {
- n->nlmsg_type = RTM_DELRULE;
- n->nlmsg_flags = NLM_F_REQUEST;
-
- if (rtnl_open(&rth2, 0) < 0)
- return -1;
-
- if (rtnl_talk(&rth2, n, 0, 0, NULL, NULL, NULL) < 0)
- return -2;
-
- rtnl_close(&rth2);
- }
-
- return 0;
-}
-
-static int iprule_flush(int argc, char **argv)
-{
- int af = preferred_family;
-
- if (af == AF_UNSPEC)
- af = AF_INET;
-
- if (argc > 0) {
- fprintf(stderr, "\"ip rule flush\" does not allow arguments\n");
- return -1;
- }
-
- if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
- perror("Cannot send dump request");
- return 1;
- }
-
- if (rtnl_dump_filter(&rth, flush_rule, NULL, NULL, NULL) < 0) {
- fprintf(stderr, "Flush terminated\n");
- return 1;
- }
-
- return 0;
-}
-
-int do_iprule(int argc, char **argv)
-{
- if (argc < 1) {
- return iprule_list(0, NULL);
- } else if (matches(argv[0], "list") == 0 ||
- matches(argv[0], "lst") == 0 ||
- matches(argv[0], "show") == 0) {
- return iprule_list(argc-1, argv+1);
- } else if (matches(argv[0], "add") == 0) {
- return iprule_modify(RTM_NEWRULE, argc-1, argv+1);
- } else if (matches(argv[0], "delete") == 0) {
- return iprule_modify(RTM_DELRULE, argc-1, argv+1);
- } else if (matches(argv[0], "flush") == 0) {
- return iprule_flush(argc-1, argv+1);
- } else if (matches(argv[0], "help") == 0)
- usage();
-
- fprintf(stderr, "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv);
- exit(-1);
-}
-
git://git.onelab.eu / iproute2.git / blobdiff