5 kx /*
5 kx * iptunnel.c "ip tunnel"
5 kx *
5 kx * This program is free software; you can redistribute it and/or
5 kx * modify it under the terms of the GNU General Public License
5 kx * as published by the Free Software Foundation; either version
5 kx * 2 of the License, or (at your option) any later version.
5 kx *
5 kx * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
5 kx *
5 kx *
5 kx * Changes:
5 kx *
5 kx * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
5 kx * Rani Assaf <rani@magic.metawire.com> 980930: do not allow key for ipip/sit
5 kx * Bernd Eckenfels 990715: add linux/types.h (not clean but solves missing __u16
5 kx * Arnaldo Carvalho de Melo 20010404: use setlocale
5 kx */
5 kx
5 kx #include <stdio.h>
5 kx #include <stdlib.h>
5 kx #include <string.h>
5 kx #include <unistd.h>
5 kx #include <syslog.h>
5 kx #include <fcntl.h>
5 kx #include <sys/socket.h>
5 kx #include <sys/ioctl.h>
5 kx #include <linux/version.h>
5 kx #if LINUX_VERSION_CODE < KERNEL_VERSION(4,9,0)
5 kx #include <netinet/in.h>
5 kx #endif
5 kx #include <arpa/inet.h>
5 kx #if defined(__GLIBC__) && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1))
5 kx #include <net/if.h>
5 kx #include <net/if_arp.h>
5 kx #else
5 kx #include <linux/if.h>
5 kx #include <linux/if_arp.h>
5 kx #endif
5 kx /* We only care about linux/if_tunnel.h. Unfortunately, older Linux headers
5 kx * (pre linux-4.8) did not include all the proper headers leading to missing
5 kx * structs and types.
5 kx */
5 kx #include <linux/types.h>
5 kx #include <linux/ip.h>
5 kx #include <linux/if_tunnel.h>
5 kx
5 kx #include "config.h"
5 kx #include "intl.h"
5 kx #include "net-support.h"
5 kx #include "version.h"
5 kx #include "util.h"
5 kx
5 kx #undef GRE_CSUM
5 kx #define GRE_CSUM htons(0x8000)
5 kx #undef GRE_ROUTING
5 kx #define GRE_ROUTING htons(0x4000)
5 kx #undef GRE_KEY
5 kx #define GRE_KEY htons(0x2000)
5 kx #undef GRE_SEQ
5 kx #define GRE_SEQ htons(0x1000)
5 kx #undef GRE_STRICT
5 kx #define GRE_STRICT htons(0x0800)
5 kx #undef GRE_REC
5 kx #define GRE_REC htons(0x0700)
5 kx #undef GRE_FLAGS
5 kx #define GRE_FLAGS htons(0x00F8)
5 kx #undef GRE_VERSION
5 kx #define GRE_VERSION htons(0x0007)
5 kx
5 kx /* Old versions of glibc do not define this */
5 kx #if __GLIBC__ == 2 && __GLIBC_MINOR__ == 0
5 kx #define IPPROTO_GRE 47
5 kx #endif
5 kx
5 kx #include "util-ank.h"
5 kx
5 kx static char *Release = RELEASE, *Signature = "Alexey Kuznetsov";
5 kx
5 kx static void version(void)
5 kx {
5 kx printf("%s\n%s\n", Release, Signature);
5 kx exit(E_VERSION);
5 kx }
5 kx
5 kx __attribute__((noreturn))
5 kx static void usage(int rc)
5 kx {
5 kx FILE *fp = rc ? stderr : stdout;
5 kx fprintf(fp, _("Usage: iptunnel { add | change | del | show } [ NAME ]\n"));
5 kx fprintf(fp, _(" [ mode { ipip | gre | sit } ] [ remote ADDR ] [ local ADDR ]\n"));
5 kx fprintf(fp, _(" [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n"));
5 kx fprintf(fp, _(" [ ttl TTL ] [ tos TOS ] [ nopmtudisc ] [ dev PHYS_DEV ]\n"));
5 kx fprintf(fp, _(" iptunnel -V | --version\n\n"));
5 kx fprintf(fp, _("Where: NAME := STRING\n"));
5 kx fprintf(fp, _(" ADDR := { IP_ADDRESS | any }\n"));
5 kx fprintf(fp, _(" TOS := { NUMBER | inherit }\n"));
5 kx fprintf(fp, _(" TTL := { 1..255 | inherit }\n"));
5 kx fprintf(fp, _(" KEY := { DOTTED_QUAD | NUMBER }\n"));
5 kx exit(rc);
5 kx }
5 kx
5 kx static int do_ioctl_get_ifindex(char *dev)
5 kx {
5 kx struct ifreq ifr;
5 kx int fd;
5 kx int err;
5 kx
5 kx safe_strncpy(ifr.ifr_name, dev, IFNAMSIZ);
5 kx fd = socket(AF_INET, SOCK_DGRAM, 0);
5 kx err = ioctl(fd, SIOCGIFINDEX, &ifr);
5 kx if (err) {
5 kx perror("ioctl");
5 kx close(fd);
5 kx return 0;
5 kx }
5 kx close(fd);
5 kx return ifr.ifr_ifindex;
5 kx }
5 kx
5 kx static int do_ioctl_get_iftype(char *dev)
5 kx {
5 kx struct ifreq ifr;
5 kx int fd;
5 kx int err;
5 kx
5 kx safe_strncpy(ifr.ifr_name, dev, IFNAMSIZ);
5 kx fd = socket(AF_INET, SOCK_DGRAM, 0);
5 kx err = ioctl(fd, SIOCGIFHWADDR, &ifr);
5 kx if (err) {
5 kx perror("ioctl");
5 kx close(fd);
5 kx return -1;
5 kx }
5 kx close(fd);
5 kx return ifr.ifr_addr.sa_family;
5 kx }
5 kx
5 kx
5 kx static char * do_ioctl_get_ifname(int idx)
5 kx {
5 kx static struct ifreq ifr;
5 kx int fd;
5 kx int err;
5 kx
5 kx ifr.ifr_ifindex = idx;
5 kx fd = socket(AF_INET, SOCK_DGRAM, 0);
5 kx err = ioctl(fd, SIOCGIFNAME, &ifr);
5 kx if (err) {
5 kx perror("ioctl");
5 kx close(fd);
5 kx return NULL;
5 kx }
5 kx close(fd);
5 kx return ifr.ifr_name;
5 kx }
5 kx
5 kx
5 kx
5 kx static int do_get_ioctl(char *basedev, struct ip_tunnel_parm *p)
5 kx {
5 kx struct ifreq ifr;
5 kx int fd;
5 kx int err;
5 kx
5 kx safe_strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
5 kx ifr.ifr_ifru.ifru_data = (void*)p;
5 kx fd = socket(AF_INET, SOCK_DGRAM, 0);
5 kx err = ioctl(fd, SIOCGETTUNNEL, &ifr);
5 kx if (err)
5 kx perror("ioctl");
5 kx close(fd);
5 kx return err;
5 kx }
5 kx
5 kx static int do_add_ioctl(int cmd, char *basedev, struct ip_tunnel_parm *p)
5 kx {
5 kx struct ifreq ifr;
5 kx int fd;
5 kx int err;
5 kx
5 kx safe_strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
5 kx ifr.ifr_ifru.ifru_data = (void*)p;
5 kx fd = socket(AF_INET, SOCK_DGRAM, 0);
5 kx err = ioctl(fd, cmd, &ifr);
5 kx if (err)
5 kx perror("ioctl");
5 kx close(fd);
5 kx return err;
5 kx }
5 kx
5 kx static int do_del_ioctl(char *basedev, struct ip_tunnel_parm *p)
5 kx {
5 kx struct ifreq ifr;
5 kx int fd;
5 kx int err;
5 kx
5 kx safe_strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
5 kx ifr.ifr_ifru.ifru_data = (void*)p;
5 kx fd = socket(AF_INET, SOCK_DGRAM, 0);
5 kx err = ioctl(fd, SIOCDELTUNNEL, &ifr);
5 kx if (err)
5 kx perror("ioctl");
5 kx close(fd);
5 kx return err;
5 kx }
5 kx
5 kx static int parse_args(int argc, char **argv, struct ip_tunnel_parm *p)
5 kx {
5 kx char medium[IFNAMSIZ];
5 kx
5 kx memset(p, 0, sizeof(*p));
5 kx memset(&medium, 0, sizeof(medium));
5 kx
5 kx p->iph.version = 4;
5 kx p->iph.ihl = 5;
5 kx #ifndef IP_DF
5 kx #define IP_DF 0x4000 /* Flag: "Don't Fragment" */
5 kx #endif
5 kx p->iph.frag_off = htons(IP_DF);
5 kx
5 kx while (argc > 0) {
5 kx if (strcmp(*argv, "mode") == 0) {
5 kx NEXT_ARG();
5 kx if (strcmp(*argv, "ipip") == 0) {
5 kx if (p->iph.protocol)
5 kx usage(E_OPTERR);
5 kx p->iph.protocol = IPPROTO_IPIP;
5 kx } else if (strcmp(*argv, "gre") == 0) {
5 kx if (p->iph.protocol)
5 kx usage(E_OPTERR);
5 kx p->iph.protocol = IPPROTO_GRE;
5 kx } else if (strcmp(*argv, "sit") == 0) {
5 kx if (p->iph.protocol)
5 kx usage(E_OPTERR);
5 kx p->iph.protocol = IPPROTO_IPV6;
5 kx } else
5 kx usage(E_OPTERR);
5 kx } else if (strcmp(*argv, "key") == 0) {
5 kx unsigned uval;
5 kx NEXT_ARG();
5 kx p->i_flags |= GRE_KEY;
5 kx p->o_flags |= GRE_KEY;
5 kx if (strchr(*argv, '.'))
5 kx p->i_key = p->o_key = get_addr32(*argv);
5 kx else {
5 kx if (scan_number(*argv, &uval)<0)
5 kx usage(E_OPTERR);
5 kx p->i_key = p->o_key = htonl(uval);
5 kx }
5 kx } else if (strcmp(*argv, "ikey") == 0) {
5 kx unsigned uval;
5 kx NEXT_ARG();
5 kx p->i_flags |= GRE_KEY;
5 kx if (strchr(*argv, '.'))
5 kx p->o_key = get_addr32(*argv);
5 kx else {
5 kx if (scan_number(*argv, &uval)<0)
5 kx usage(E_OPTERR);
5 kx p->i_key = htonl(uval);
5 kx }
5 kx } else if (strcmp(*argv, "okey") == 0) {
5 kx unsigned uval;
5 kx NEXT_ARG();
5 kx p->o_flags |= GRE_KEY;
5 kx if (strchr(*argv, '.'))
5 kx p->o_key = get_addr32(*argv);
5 kx else {
5 kx if (scan_number(*argv, &uval)<0)
5 kx usage(E_OPTERR);
5 kx p->o_key = htonl(uval);
5 kx }
5 kx } else if (strcmp(*argv, "seq") == 0) {
5 kx p->i_flags |= GRE_SEQ;
5 kx p->o_flags |= GRE_SEQ;
5 kx } else if (strcmp(*argv, "iseq") == 0) {
5 kx p->i_flags |= GRE_SEQ;
5 kx } else if (strcmp(*argv, "oseq") == 0) {
5 kx p->o_flags |= GRE_SEQ;
5 kx } else if (strcmp(*argv, "csum") == 0) {
5 kx p->i_flags |= GRE_CSUM;
5 kx p->o_flags |= GRE_CSUM;
5 kx } else if (strcmp(*argv, "icsum") == 0) {
5 kx p->i_flags |= GRE_CSUM;
5 kx } else if (strcmp(*argv, "ocsum") == 0) {
5 kx p->o_flags |= GRE_CSUM;
5 kx } else if (strcmp(*argv, "nopmtudisc") == 0) {
5 kx p->iph.frag_off = 0;
5 kx } else if (strcmp(*argv, "remote") == 0) {
5 kx NEXT_ARG();
5 kx if (strcmp(*argv, "any"))
5 kx p->iph.daddr = get_addr32(*argv);
5 kx } else if (strcmp(*argv, "local") == 0) {
5 kx NEXT_ARG();
5 kx if (strcmp(*argv, "any"))
5 kx p->iph.saddr = get_addr32(*argv);
5 kx } else if (strcmp(*argv, "dev") == 0) {
5 kx NEXT_ARG();
5 kx safe_strncpy(medium, *argv, IFNAMSIZ-1);
5 kx } else if (strcmp(*argv, "ttl") == 0) {
5 kx unsigned uval;
5 kx NEXT_ARG();
5 kx if (strcmp(*argv, "inherit") != 0) {
5 kx if (scan_number(*argv, &uval)<0)
5 kx usage(E_OPTERR);
5 kx if (uval > 255)
5 kx usage(E_OPTERR);
5 kx p->iph.ttl = uval;
5 kx }
5 kx } else if (strcmp(*argv, "tos") == 0) {
5 kx unsigned uval;
5 kx NEXT_ARG();
5 kx if (strcmp(*argv, "inherit") != 0) {
5 kx if (scan_number(*argv, &uval)<0)
5 kx usage(E_OPTERR);
5 kx if (uval > 255)
5 kx usage(E_OPTERR);
5 kx p->iph.tos = uval;
5 kx } else
5 kx p->iph.tos = 1;
5 kx } else {
5 kx if (p->name[0])
5 kx usage(E_OPTERR);
5 kx safe_strncpy(p->name, *argv, IFNAMSIZ);
5 kx }
5 kx argc--; argv++;
5 kx }
5 kx
5 kx if (p->iph.protocol == 0) {
5 kx if (memcmp(p->name, "gre", 3) == 0)
5 kx p->iph.protocol = IPPROTO_GRE;
5 kx else if (memcmp(p->name, "ipip", 4) == 0)
5 kx p->iph.protocol = IPPROTO_IPIP;
5 kx else if (memcmp(p->name, "sit", 3) == 0)
5 kx p->iph.protocol = IPPROTO_IPV6;
5 kx }
5 kx
5 kx if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) {
5 kx if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) {
5 kx fprintf(stderr, _("Keys are not allowed with ipip and sit.\n"));
5 kx return -1;
5 kx }
5 kx }
5 kx
5 kx if (medium[0]) {
5 kx p->link = do_ioctl_get_ifindex(medium);
5 kx if (p->link == 0)
5 kx return -1;
5 kx }
5 kx
5 kx if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
5 kx p->i_key = p->iph.daddr;
5 kx p->i_flags |= GRE_KEY;
5 kx }
5 kx if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
5 kx p->o_key = p->iph.daddr;
5 kx p->o_flags |= GRE_KEY;
5 kx }
5 kx if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
5 kx fprintf(stderr, _("Broadcast tunnel requires a source address.\n"));
5 kx return -1;
5 kx }
5 kx return 0;
5 kx }
5 kx
5 kx
5 kx static int do_add(int cmd, int argc, char **argv)
5 kx {
5 kx struct ip_tunnel_parm p;
5 kx
5 kx if (parse_args(argc, argv, &p) < 0)
5 kx return -1;
5 kx
5 kx if (p.iph.ttl && p.iph.frag_off == 0) {
5 kx fprintf(stderr, _("ttl != 0 and noptmudisc are incompatible\n"));
5 kx return -1;
5 kx }
5 kx
5 kx switch (p.iph.protocol) {
5 kx case IPPROTO_IPIP:
5 kx return do_add_ioctl(cmd, "tunl0", &p);
5 kx case IPPROTO_GRE:
5 kx return do_add_ioctl(cmd, "gre0", &p);
5 kx case IPPROTO_IPV6:
5 kx return do_add_ioctl(cmd, "sit0", &p);
5 kx default:
5 kx fprintf(stderr, _("cannot determine tunnel mode (ipip, gre or sit)\n"));
5 kx return -1;
5 kx }
5 kx return -1;
5 kx }
5 kx
5 kx int do_del(int argc, char **argv)
5 kx {
5 kx struct ip_tunnel_parm p;
5 kx
5 kx if (parse_args(argc, argv, &p) < 0)
5 kx return -1;
5 kx
5 kx switch (p.iph.protocol) {
5 kx case IPPROTO_IPIP:
5 kx return do_del_ioctl(p.name[0] ? p.name : "tunl0", &p);
5 kx case IPPROTO_GRE:
5 kx return do_del_ioctl(p.name[0] ? p.name : "gre0", &p);
5 kx case IPPROTO_IPV6:
5 kx return do_del_ioctl(p.name[0] ? p.name : "sit0", &p);
5 kx default:
5 kx return do_del_ioctl(p.name, &p);
5 kx }
5 kx return -1;
5 kx }
5 kx
5 kx void print_tunnel(struct ip_tunnel_parm *p)
5 kx {
5 kx char s1[256];
5 kx char s2[256];
5 kx char s3[64];
5 kx char s4[64];
5 kx
5 kx format_host(AF_INET, &p->iph.daddr, s1, sizeof(s1));
5 kx format_host(AF_INET, &p->iph.saddr, s2, sizeof(s2));
5 kx inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3));
5 kx inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4));
5 kx
5 kx printf(_("%s: %s/ip remote %s local %s "),
5 kx p->name,
5 kx p->iph.protocol == IPPROTO_IPIP ? "ip" :
5 kx (p->iph.protocol == IPPROTO_GRE ? "gre" :
5 kx (p->iph.protocol == IPPROTO_IPV6 ? "ipv6" : _("unknown"))),
5 kx p->iph.daddr ? s1 : "any", p->iph.saddr ? s2 : "any");
5 kx if (p->link) {
5 kx char *n = do_ioctl_get_ifname(p->link);
5 kx if (n)
5 kx printf(" dev %s ", n);
5 kx }
5 kx if (p->iph.ttl)
5 kx printf(" ttl %d ", p->iph.ttl);
5 kx else
5 kx printf(" ttl inherit ");
5 kx if (p->iph.tos) {
5 kx printf(" tos");
5 kx if (p->iph.tos&1)
5 kx printf(" inherit");
5 kx if (p->iph.tos&~1)
5 kx printf("%c%02x ", p->iph.tos&1 ? '/' : ' ', p->iph.tos&~1);
5 kx }
5 kx if (!(p->iph.frag_off&htons(IP_DF)))
5 kx printf(" nopmtudisc");
5 kx
5 kx if ((p->i_flags&GRE_KEY) && (p->o_flags&GRE_KEY) && p->o_key == p->i_key)
5 kx printf(" key %s", s3);
5 kx else if ((p->i_flags|p->o_flags)&GRE_KEY) {
5 kx if (p->i_flags&GRE_KEY)
5 kx printf(" ikey %s ", s3);
5 kx if (p->o_flags&GRE_KEY)
5 kx printf(" okey %s ", s4);
5 kx }
5 kx printf("\n");
5 kx
5 kx if (p->i_flags&GRE_SEQ)
5 kx printf(_(" Drop packets out of sequence.\n"));
5 kx if (p->i_flags&GRE_CSUM)
5 kx printf(_(" Checksum in received packet is required.\n"));
5 kx if (p->o_flags&GRE_SEQ)
5 kx printf(_(" Sequence packets on output.\n"));
5 kx if (p->o_flags&GRE_CSUM)
5 kx printf(_(" Checksum output packets.\n"));
5 kx }
5 kx
5 kx static int do_tunnels_list(struct ip_tunnel_parm *p)
5 kx {
5 kx char name[IFNAMSIZ];
5 kx unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
5 kx rx_fifo, rx_frame,
5 kx tx_bytes, tx_packets, tx_errs, tx_drops,
5 kx tx_fifo, tx_colls, tx_carrier, rx_multi;
5 kx int type;
5 kx struct ip_tunnel_parm p1;
5 kx
5 kx char buf[512];
5 kx FILE *fp = fopen("/proc/net/dev", "r");
5 kx if (fp == NULL) {
5 kx perror("fopen");
5 kx return -1;
5 kx }
5 kx
5 kx if (fgets(buf, sizeof(buf), fp))
5 kx /* eat line */;
5 kx if (fgets(buf, sizeof(buf), fp))
5 kx /* eat line */;
5 kx
5 kx while (fgets(buf, sizeof(buf), fp) != NULL) {
5 kx char *ptr;
5 kx buf[sizeof(buf) - 1] = 0;
5 kx if ((ptr = strchr(buf, ':')) == NULL ||
5 kx (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
5 kx fprintf(stderr, _("Wrong format of /proc/net/dev. Sorry.\n"));
5 kx fclose(fp);
5 kx return -1;
5 kx }
5 kx if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*u%lu%lu%lu%lu%lu%lu%lu",
5 kx &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
5 kx &rx_fifo, &rx_frame, &rx_multi,
5 kx &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
5 kx &tx_fifo, &tx_colls, &tx_carrier) != 14)
5 kx continue;
5 kx if (p->name[0] && strcmp(p->name, name))
5 kx continue;
5 kx type = do_ioctl_get_iftype(name);
5 kx if (type == -1) {
5 kx fprintf(stderr, _("Failed to get type of [%s]\n"), name);
5 kx continue;
5 kx }
5 kx if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
5 kx continue;
5 kx memset(&p1, 0, sizeof(p1));
5 kx if (do_get_ioctl(name, &p1))
5 kx continue;
5 kx if ((p->link && p1.link != p->link) ||
5 kx (p->name[0] && strcmp(p1.name, p->name)) ||
5 kx (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
5 kx (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
5 kx (p->i_key && p1.i_key != p->i_key))
5 kx continue;
5 kx print_tunnel(&p1);
5 kx if (show_stats) {
5 kx printf(_("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts\n"));
5 kx printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld\n",
5 kx rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi);
5 kx printf(_("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs\n"));
5 kx printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld\n\n",
5 kx tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
5 kx }
5 kx }
5 kx fclose(fp);
5 kx return 0;
5 kx }
5 kx
5 kx static int do_show(int argc, char **argv)
5 kx {
5 kx int err;
5 kx struct ip_tunnel_parm p;
5 kx
5 kx if (parse_args(argc, argv, &p) < 0)
5 kx return -1;
5 kx
5 kx switch (p.iph.protocol) {
5 kx case IPPROTO_IPIP:
5 kx err = do_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
5 kx break;
5 kx case IPPROTO_GRE:
5 kx err = do_get_ioctl(p.name[0] ? p.name : "gre0", &p);
5 kx break;
5 kx case IPPROTO_IPV6:
5 kx err = do_get_ioctl(p.name[0] ? p.name : "sit0", &p);
5 kx break;
5 kx default:
5 kx do_tunnels_list(&p);
5 kx return 0;
5 kx }
5 kx if (err)
5 kx return -1;
5 kx
5 kx print_tunnel(&p);
5 kx return 0;
5 kx }
5 kx
5 kx int do_iptunnel(int argc, char **argv)
5 kx {
5 kx if (argc > 0) {
5 kx if (matches(*argv, "add") == 0)
5 kx return do_add(SIOCADDTUNNEL, argc-1, argv+1);
5 kx if (matches(*argv, "change") == 0)
5 kx return do_add(SIOCCHGTUNNEL, argc-1, argv+1);
5 kx if (matches(*argv, "del") == 0)
5 kx return do_del(argc-1, argv+1);
5 kx if (matches(*argv, "show") == 0 ||
5 kx matches(*argv, "lst") == 0 ||
5 kx matches(*argv, "list") == 0)
5 kx return do_show(argc-1, argv+1);
5 kx } else
5 kx return do_show(0, NULL);
5 kx
5 kx usage(E_OPTERR);
5 kx }
5 kx
5 kx
5 kx int preferred_family = AF_UNSPEC;
5 kx int show_stats = 0;
5 kx int resolve_hosts = 0;
5 kx
5 kx int main(int argc, char **argv)
5 kx {
5 kx char *basename;
5 kx
5 kx #if I18N
5 kx setlocale (LC_ALL, "");
5 kx bindtextdomain("net-tools", "/usr/share/locale");
5 kx textdomain("net-tools");
5 kx #endif
5 kx
5 kx basename = strrchr(argv[0], '/');
5 kx if (basename == NULL)
5 kx basename = argv[0];
5 kx else
5 kx basename++;
5 kx
5 kx while (argc > 1) {
5 kx if (argv[1][0] != '-')
5 kx break;
5 kx if (matches(argv[1], "-family") == 0) {
5 kx argc--;
5 kx argv++;
5 kx if (argc <= 1)
5 kx usage(E_OPTERR);
5 kx if (strcmp(argv[1], "inet") == 0)
5 kx preferred_family = AF_INET;
5 kx else if (strcmp(argv[1], "inet6") == 0)
5 kx preferred_family = AF_INET6;
5 kx else
5 kx usage(E_OPTERR);
5 kx } else if (matches(argv[1], "-stats") == 0 ||
5 kx matches(argv[1], "-statistics") == 0) {
5 kx ++show_stats;
5 kx } else if (matches(argv[1], "-resolve") == 0) {
5 kx ++resolve_hosts;
5 kx } else if ((matches(argv[1], "-V") == 0) || (matches(argv[1], "--version") == 0)) {
5 kx version();
5 kx } else if ((matches(argv[1], "-h") == 0) || (matches(argv[1], "--help") == 0)) {
5 kx usage(E_USAGE);
5 kx } else
5 kx usage(E_OPTERR);
5 kx argc--; argv++;
5 kx }
5 kx
5 kx return do_iptunnel(argc-1, argv+1);
5 kx }
Radix cross Linux
The main Radix cross Linux repository contains the build scripts of packages, which have the most complete and common functionality for desktop machines
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