+++ /dev/null
-/*
- * iptunnel.c "ip tunnel"
- *
- * 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
- * Rani Assaf <rani@magic.metawire.com> 980930: do not allow key for ipip/sit
- * Phil Karn <karn@ka9q.ampr.org> 990408: "pmtudisc" flag
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <fcntl.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <sys/ioctl.h>
-#include <linux/if.h>
-#include <linux/if_arp.h>
-#include <linux/ip.h>
-
-#ifndef __constant_htons
-#define __constant_htons(x) htons(x)
-#endif
-
-#include <linux/if_tunnel.h>
-
-#include "rt_names.h"
-#include "utils.h"
-
-static void usage(void) __attribute__((noreturn));
-
-static void usage(void)
-{
- fprintf(stderr, "Usage: ip tunnel { add | change | del | show } [ NAME ]\n");
- fprintf(stderr, " [ mode { ipip | gre | sit } ] [ remote ADDR ] [ local ADDR ]\n");
- fprintf(stderr, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
- fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
- fprintf(stderr, "\n");
- fprintf(stderr, "Where: NAME := STRING\n");
- fprintf(stderr, " ADDR := { IP_ADDRESS | any }\n");
- fprintf(stderr, " TOS := { NUMBER | inherit }\n");
- fprintf(stderr, " TTL := { 1..255 | inherit }\n");
- fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n");
- exit(-1);
-}
-
-static int do_ioctl_get_ifindex(const char *dev)
-{
- struct ifreq ifr;
- int fd;
- int err;
-
- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- err = ioctl(fd, SIOCGIFINDEX, &ifr);
- if (err) {
- perror("ioctl");
- return 0;
- }
- close(fd);
- return ifr.ifr_ifindex;
-}
-
-static int do_ioctl_get_iftype(const char *dev)
-{
- struct ifreq ifr;
- int fd;
- int err;
-
- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- err = ioctl(fd, SIOCGIFHWADDR, &ifr);
- if (err) {
- perror("ioctl");
- return -1;
- }
- close(fd);
- return ifr.ifr_addr.sa_family;
-}
-
-
-static char * do_ioctl_get_ifname(int idx)
-{
- static struct ifreq ifr;
- int fd;
- int err;
-
- ifr.ifr_ifindex = idx;
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- err = ioctl(fd, SIOCGIFNAME, &ifr);
- if (err) {
- perror("ioctl");
- return NULL;
- }
- close(fd);
- return ifr.ifr_name;
-}
-
-
-static int do_get_ioctl(const char *basedev, struct ip_tunnel_parm *p)
-{
- struct ifreq ifr;
- int fd;
- int err;
-
- strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
- ifr.ifr_ifru.ifru_data = (void*)p;
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- err = ioctl(fd, SIOCGETTUNNEL, &ifr);
- if (err)
- perror("ioctl");
- close(fd);
- return err;
-}
-
-static int do_add_ioctl(int cmd, const char *basedev, struct ip_tunnel_parm *p)
-{
- struct ifreq ifr;
- int fd;
- int err;
-
- if (cmd == SIOCCHGTUNNEL && p->name[0])
- strncpy(ifr.ifr_name, p->name, IFNAMSIZ);
- else
- strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
- ifr.ifr_ifru.ifru_data = (void*)p;
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- err = ioctl(fd, cmd, &ifr);
- if (err)
- perror("ioctl");
- close(fd);
- return err;
-}
-
-static int do_del_ioctl(const char *basedev, struct ip_tunnel_parm *p)
-{
- struct ifreq ifr;
- int fd;
- int err;
-
- if (p->name[0])
- strncpy(ifr.ifr_name, p->name, IFNAMSIZ);
- else
- strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
- ifr.ifr_ifru.ifru_data = (void*)p;
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- err = ioctl(fd, SIOCDELTUNNEL, &ifr);
- if (err)
- perror("ioctl");
- close(fd);
- return err;
-}
-
-static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
-{
- int count = 0;
- char medium[IFNAMSIZ];
-
- memset(p, 0, sizeof(*p));
- memset(&medium, 0, sizeof(medium));
-
- p->iph.version = 4;
- p->iph.ihl = 5;
-#ifndef IP_DF
-#define IP_DF 0x4000 /* Flag: "Don't Fragment" */
-#endif
- p->iph.frag_off = htons(IP_DF);
-
- while (argc > 0) {
- if (strcmp(*argv, "mode") == 0) {
- NEXT_ARG();
- if (strcmp(*argv, "ipip") == 0 ||
- strcmp(*argv, "ip/ip") == 0) {
- if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) {
- fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
- exit(-1);
- }
- p->iph.protocol = IPPROTO_IPIP;
- } else if (strcmp(*argv, "gre") == 0 ||
- strcmp(*argv, "gre/ip") == 0) {
- if (p->iph.protocol && p->iph.protocol != IPPROTO_GRE) {
- fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
- exit(-1);
- }
- p->iph.protocol = IPPROTO_GRE;
- } else if (strcmp(*argv, "sit") == 0 ||
- strcmp(*argv, "ipv6/ip") == 0) {
- if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
- fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
- exit(-1);
- }
- p->iph.protocol = IPPROTO_IPV6;
- } else {
- fprintf(stderr,"Cannot guess tunnel mode.\n");
- exit(-1);
- }
- } else if (strcmp(*argv, "key") == 0) {
- unsigned uval;
- NEXT_ARG();
- p->i_flags |= GRE_KEY;
- p->o_flags |= GRE_KEY;
- if (strchr(*argv, '.'))
- p->i_key = p->o_key = get_addr32(*argv);
- else {
- if (get_unsigned(&uval, *argv, 0)<0) {
- fprintf(stderr, "invalid value of \"key\"\n");
- exit(-1);
- }
- p->i_key = p->o_key = htonl(uval);
- }
- } else if (strcmp(*argv, "ikey") == 0) {
- unsigned uval;
- NEXT_ARG();
- p->i_flags |= GRE_KEY;
- if (strchr(*argv, '.'))
- p->o_key = get_addr32(*argv);
- else {
- if (get_unsigned(&uval, *argv, 0)<0) {
- fprintf(stderr, "invalid value of \"ikey\"\n");
- exit(-1);
- }
- p->i_key = htonl(uval);
- }
- } else if (strcmp(*argv, "okey") == 0) {
- unsigned uval;
- NEXT_ARG();
- p->o_flags |= GRE_KEY;
- if (strchr(*argv, '.'))
- p->o_key = get_addr32(*argv);
- else {
- if (get_unsigned(&uval, *argv, 0)<0) {
- fprintf(stderr, "invalid value of \"okey\"\n");
- exit(-1);
- }
- p->o_key = htonl(uval);
- }
- } else if (strcmp(*argv, "seq") == 0) {
- p->i_flags |= GRE_SEQ;
- p->o_flags |= GRE_SEQ;
- } else if (strcmp(*argv, "iseq") == 0) {
- p->i_flags |= GRE_SEQ;
- } else if (strcmp(*argv, "oseq") == 0) {
- p->o_flags |= GRE_SEQ;
- } else if (strcmp(*argv, "csum") == 0) {
- p->i_flags |= GRE_CSUM;
- p->o_flags |= GRE_CSUM;
- } else if (strcmp(*argv, "icsum") == 0) {
- p->i_flags |= GRE_CSUM;
- } else if (strcmp(*argv, "ocsum") == 0) {
- p->o_flags |= GRE_CSUM;
- } else if (strcmp(*argv, "nopmtudisc") == 0) {
- p->iph.frag_off = 0;
- } else if (strcmp(*argv, "pmtudisc") == 0) {
- p->iph.frag_off = htons(IP_DF);
- } else if (strcmp(*argv, "remote") == 0) {
- NEXT_ARG();
- if (strcmp(*argv, "any"))
- p->iph.daddr = get_addr32(*argv);
- } else if (strcmp(*argv, "local") == 0) {
- NEXT_ARG();
- if (strcmp(*argv, "any"))
- p->iph.saddr = get_addr32(*argv);
- } else if (strcmp(*argv, "dev") == 0) {
- NEXT_ARG();
- strncpy(medium, *argv, IFNAMSIZ-1);
- } else if (strcmp(*argv, "ttl") == 0) {
- unsigned uval;
- NEXT_ARG();
- if (strcmp(*argv, "inherit") != 0) {
- if (get_unsigned(&uval, *argv, 0))
- invarg("invalid TTL\n", *argv);
- if (uval > 255)
- invarg("TTL must be <=255\n", *argv);
- p->iph.ttl = uval;
- }
- } else if (strcmp(*argv, "tos") == 0 ||
- matches(*argv, "dsfield") == 0) {
- __u32 uval;
- NEXT_ARG();
- if (strcmp(*argv, "inherit") != 0) {
- if (rtnl_dsfield_a2n(&uval, *argv))
- invarg("bad TOS value", *argv);
- p->iph.tos = uval;
- } else
- p->iph.tos = 1;
- } else {
- if (strcmp(*argv, "name") == 0) {
- NEXT_ARG();
- }
- if (matches(*argv, "help") == 0)
- usage();
- if (p->name[0])
- duparg2("name", *argv);
- strncpy(p->name, *argv, IFNAMSIZ);
- if (cmd == SIOCCHGTUNNEL && count == 0) {
- struct ip_tunnel_parm old_p;
- memset(&old_p, 0, sizeof(old_p));
- if (do_get_ioctl(*argv, &old_p))
- return -1;
- *p = old_p;
- }
- }
- count++;
- argc--; argv++;
- }
-
-
- if (p->iph.protocol == 0) {
- if (memcmp(p->name, "gre", 3) == 0)
- p->iph.protocol = IPPROTO_GRE;
- else if (memcmp(p->name, "ipip", 4) == 0)
- p->iph.protocol = IPPROTO_IPIP;
- else if (memcmp(p->name, "sit", 3) == 0)
- p->iph.protocol = IPPROTO_IPV6;
- }
-
- if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) {
- if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) {
- fprintf(stderr, "Keys are not allowed with ipip and sit.\n");
- return -1;
- }
- }
-
- if (medium[0]) {
- p->link = do_ioctl_get_ifindex(medium);
- if (p->link == 0)
- return -1;
- }
-
- if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
- p->i_key = p->iph.daddr;
- p->i_flags |= GRE_KEY;
- }
- if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
- p->o_key = p->iph.daddr;
- p->o_flags |= GRE_KEY;
- }
- if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
- fprintf(stderr, "Broadcast tunnel requires a source address.\n");
- return -1;
- }
- return 0;
-}
-
-
-static int do_add(int cmd, int argc, char **argv)
-{
- struct ip_tunnel_parm p;
-
- if (parse_args(argc, argv, cmd, &p) < 0)
- return -1;
-
- if (p.iph.ttl && p.iph.frag_off == 0) {
- fprintf(stderr, "ttl != 0 and noptmudisc are incompatible\n");
- return -1;
- }
-
- switch (p.iph.protocol) {
- case IPPROTO_IPIP:
- return do_add_ioctl(cmd, "tunl0", &p);
- case IPPROTO_GRE:
- return do_add_ioctl(cmd, "gre0", &p);
- case IPPROTO_IPV6:
- return do_add_ioctl(cmd, "sit0", &p);
- default:
- fprintf(stderr, "cannot determine tunnel mode (ipip, gre or sit)\n");
- return -1;
- }
- return -1;
-}
-
-int do_del(int argc, char **argv)
-{
- struct ip_tunnel_parm p;
-
- if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
- return -1;
-
- switch (p.iph.protocol) {
- case IPPROTO_IPIP:
- return do_del_ioctl("tunl0", &p);
- case IPPROTO_GRE:
- return do_del_ioctl("gre0", &p);
- case IPPROTO_IPV6:
- return do_del_ioctl("sit0", &p);
- default:
- return do_del_ioctl(p.name, &p);
- }
- return -1;
-}
-
-void print_tunnel(struct ip_tunnel_parm *p)
-{
- char s1[1024];
- char s2[1024];
- char s3[64];
- char s4[64];
-
- inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3));
- inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4));
-
- /* Do not use format_host() for local addr,
- * symbolic name will not be useful.
- */
- printf("%s: %s/ip remote %s local %s ",
- p->name,
- p->iph.protocol == IPPROTO_IPIP ? "ip" :
- (p->iph.protocol == IPPROTO_GRE ? "gre" :
- (p->iph.protocol == IPPROTO_IPV6 ? "ipv6" : "unknown")),
- p->iph.daddr ? format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1)) : "any",
- p->iph.saddr ? rt_addr_n2a(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)) : "any");
-
- if (p->link) {
- char *n = do_ioctl_get_ifname(p->link);
- if (n)
- printf(" dev %s ", n);
- }
-
- if (p->iph.ttl)
- printf(" ttl %d ", p->iph.ttl);
- else
- printf(" ttl inherit ");
-
- if (p->iph.tos) {
- SPRINT_BUF(b1);
- printf(" tos");
- if (p->iph.tos&1)
- printf(" inherit");
- if (p->iph.tos&~1)
- printf("%c%s ", p->iph.tos&1 ? '/' : ' ',
- rtnl_dsfield_n2a(p->iph.tos&~1, b1, sizeof(b1)));
- }
-
- if (!(p->iph.frag_off&htons(IP_DF)))
- printf(" nopmtudisc");
-
- if ((p->i_flags&GRE_KEY) && (p->o_flags&GRE_KEY) && p->o_key == p->i_key)
- printf(" key %s", s3);
- else if ((p->i_flags|p->o_flags)&GRE_KEY) {
- if (p->i_flags&GRE_KEY)
- printf(" ikey %s ", s3);
- if (p->o_flags&GRE_KEY)
- printf(" okey %s ", s4);
- }
-
- if (p->i_flags&GRE_SEQ)
- printf("%s Drop packets out of sequence.\n", _SL_);
- if (p->i_flags&GRE_CSUM)
- printf("%s Checksum in received packet is required.", _SL_);
- if (p->o_flags&GRE_SEQ)
- printf("%s Sequence packets on output.", _SL_);
- if (p->o_flags&GRE_CSUM)
- printf("%s Checksum output packets.", _SL_);
-}
-
-static int do_tunnels_list(struct ip_tunnel_parm *p)
-{
- char name[IFNAMSIZ];
- unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
- rx_fifo, rx_frame,
- tx_bytes, tx_packets, tx_errs, tx_drops,
- tx_fifo, tx_colls, tx_carrier, rx_multi;
- int type;
- struct ip_tunnel_parm p1;
-
- char buf[512];
- FILE *fp = fopen("/proc/net/dev", "r");
- if (fp == NULL) {
- perror("fopen");
- return -1;
- }
-
- fgets(buf, sizeof(buf), fp);
- fgets(buf, sizeof(buf), fp);
-
- while (fgets(buf, sizeof(buf), fp) != NULL) {
- char *ptr;
- buf[sizeof(buf) - 1] = 0;
- if ((ptr = strchr(buf, ':')) == NULL ||
- (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
- fprintf(stderr, "Wrong format of /proc/net/dev. Sorry.\n");
- return -1;
- }
- if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
- &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
- &rx_fifo, &rx_frame, &rx_multi,
- &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
- &tx_fifo, &tx_colls, &tx_carrier) != 14)
- continue;
- if (p->name[0] && strcmp(p->name, name))
- continue;
- type = do_ioctl_get_iftype(name);
- if (type == -1) {
- fprintf(stderr, "Failed to get type of [%s]\n", name);
- continue;
- }
- if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
- continue;
- memset(&p1, 0, sizeof(p1));
- if (do_get_ioctl(name, &p1))
- continue;
- if ((p->link && p1.link != p->link) ||
- (p->name[0] && strcmp(p1.name, p->name)) ||
- (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
- (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
- (p->i_key && p1.i_key != p->i_key))
- continue;
- print_tunnel(&p1);
- if (show_stats) {
- printf("%s", _SL_);
- printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
- printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
- rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
- printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_);
- printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
- tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
- }
- printf("\n");
- }
- return 0;
-}
-
-static int do_show(int argc, char **argv)
-{
- int err;
- struct ip_tunnel_parm p;
-
- if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
- return -1;
-
- switch (p.iph.protocol) {
- case IPPROTO_IPIP:
- err = do_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
- break;
- case IPPROTO_GRE:
- err = do_get_ioctl(p.name[0] ? p.name : "gre0", &p);
- break;
- case IPPROTO_IPV6:
- err = do_get_ioctl(p.name[0] ? p.name : "sit0", &p);
- break;
- default:
- do_tunnels_list(&p);
- return 0;
- }
- if (err)
- return -1;
-
- print_tunnel(&p);
- printf("\n");
- return 0;
-}
-
-int do_iptunnel(int argc, char **argv)
-{
- if (argc > 0) {
- if (matches(*argv, "add") == 0)
- return do_add(SIOCADDTUNNEL, argc-1, argv+1);
- if (matches(*argv, "change") == 0)
- return do_add(SIOCCHGTUNNEL, argc-1, argv+1);
- if (matches(*argv, "del") == 0)
- return do_del(argc-1, argv+1);
- if (matches(*argv, "show") == 0 ||
- matches(*argv, "lst") == 0 ||
- matches(*argv, "list") == 0)
- return do_show(argc-1, argv+1);
- if (matches(*argv, "help") == 0)
- usage();
- } else
- return do_show(0, NULL);
-
- fprintf(stderr, "Command \"%s\" is unknown, try \"ip tunnel help\".\n", *argv);
- exit(-1);
-}
git://git.onelab.eu / iproute2.git / blobdiff