| /* |
| * Copyright (C)2006 USAGI/WIDE Project |
| * |
| * 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. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, see <http://www.gnu.org/licenses>. |
| */ |
| /* |
| * Author: |
| * Masahide NAKAMURA @USAGI |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <arpa/inet.h> |
| #include <sys/ioctl.h> |
| #include <linux/ip.h> |
| #include <linux/if.h> |
| #include <linux/if_arp.h> |
| #include <linux/if_tunnel.h> |
| #include <linux/ip6_tunnel.h> |
| |
| #include "utils.h" |
| #include "tunnel.h" |
| #include "ip_common.h" |
| |
| #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000) |
| #define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF) |
| |
| #define DEFAULT_TNL_HOP_LIMIT (64) |
| |
| static void usage(void) __attribute__((noreturn)); |
| |
| static void usage(void) |
| { |
| fprintf(stderr, "Usage: ip -f inet6 tunnel { add | change | del | show } [ NAME ]\n"); |
| fprintf(stderr, " [ mode { ip6ip6 | ipip6 | ip6gre | vti6 | any } ]\n"); |
| fprintf(stderr, " [ remote ADDR local ADDR ] [ dev PHYS_DEV ]\n"); |
| fprintf(stderr, " [ encaplimit ELIM ]\n"); |
| fprintf(stderr ," [ hoplimit TTL ] [ tclass TCLASS ] [ flowlabel FLOWLABEL ]\n"); |
| fprintf(stderr, " [ dscp inherit ]\n"); |
| fprintf(stderr, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n"); |
| fprintf(stderr, "\n"); |
| fprintf(stderr, "Where: NAME := STRING\n"); |
| fprintf(stderr, " ADDR := IPV6_ADDRESS\n"); |
| fprintf(stderr, " ELIM := { none | 0..255 }(default=%d)\n", |
| IPV6_DEFAULT_TNL_ENCAP_LIMIT); |
| fprintf(stderr, " TTL := 0..255 (default=%d)\n", |
| DEFAULT_TNL_HOP_LIMIT); |
| fprintf(stderr, " TCLASS := { 0x0..0xff | inherit }\n"); |
| fprintf(stderr, " FLOWLABEL := { 0x0..0xfffff | inherit }\n"); |
| fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n"); |
| exit(-1); |
| } |
| |
| static void print_tunnel(struct ip6_tnl_parm2 *p) |
| { |
| char s1[1024]; |
| char s2[1024]; |
| |
| /* Do not use format_host() for local addr, |
| * symbolic name will not be useful. |
| */ |
| printf("%s: %s/ipv6 remote %s local %s", |
| p->name, |
| tnl_strproto(p->proto), |
| format_host(AF_INET6, 16, &p->raddr, s1, sizeof(s1)), |
| rt_addr_n2a(AF_INET6, 16, &p->laddr, s2, sizeof(s2))); |
| if (p->link) { |
| const char *n = ll_index_to_name(p->link); |
| if (n) |
| printf(" dev %s", n); |
| } |
| |
| if (p->flags & IP6_TNL_F_IGN_ENCAP_LIMIT) |
| printf(" encaplimit none"); |
| else |
| printf(" encaplimit %u", p->encap_limit); |
| |
| printf(" hoplimit %u", p->hop_limit); |
| |
| if (p->flags & IP6_TNL_F_USE_ORIG_TCLASS) |
| printf(" tclass inherit"); |
| else { |
| __u32 val = ntohl(p->flowinfo & IP6_FLOWINFO_TCLASS); |
| printf(" tclass 0x%02x", (__u8)(val >> 20)); |
| } |
| |
| if (p->flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) |
| printf(" flowlabel inherit"); |
| else |
| printf(" flowlabel 0x%05x", ntohl(p->flowinfo & IP6_FLOWINFO_FLOWLABEL)); |
| |
| printf(" (flowinfo 0x%08x)", ntohl(p->flowinfo)); |
| |
| if (p->flags & IP6_TNL_F_RCV_DSCP_COPY) |
| printf(" dscp inherit"); |
| |
| if (p->proto == IPPROTO_GRE) { |
| if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) && p->o_key == p->i_key) |
| printf(" key %u", ntohl(p->i_key)); |
| else if ((p->i_flags | p->o_flags) & GRE_KEY) { |
| if (p->i_flags & GRE_KEY) |
| printf(" ikey %u", ntohl(p->i_key)); |
| if (p->o_flags & GRE_KEY) |
| printf(" okey %u", ntohl(p->o_key)); |
| } |
| |
| if (p->i_flags & GRE_SEQ) |
| printf("%s Drop packets out of sequence.", _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 parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm2 *p) |
| { |
| int count = 0; |
| char medium[IFNAMSIZ]; |
| |
| memset(medium, 0, sizeof(medium)); |
| |
| while (argc > 0) { |
| if (strcmp(*argv, "mode") == 0) { |
| NEXT_ARG(); |
| if (strcmp(*argv, "ipv6/ipv6") == 0 || |
| strcmp(*argv, "ip6ip6") == 0) |
| p->proto = IPPROTO_IPV6; |
| else if (strcmp(*argv, "vti6") == 0) { |
| p->proto = IPPROTO_IPV6; |
| p->i_flags |= VTI_ISVTI; |
| } else if (strcmp(*argv, "ip/ipv6") == 0 || |
| strcmp(*argv, "ipv4/ipv6") == 0 || |
| strcmp(*argv, "ipip6") == 0 || |
| strcmp(*argv, "ip4ip6") == 0) |
| p->proto = IPPROTO_IPIP; |
| else if (strcmp(*argv, "ip6gre") == 0 || |
| strcmp(*argv, "gre/ipv6") == 0) |
| p->proto = IPPROTO_GRE; |
| else if (strcmp(*argv, "any/ipv6") == 0 || |
| strcmp(*argv, "any") == 0) |
| p->proto = 0; |
| else { |
| fprintf(stderr,"Unknown tunnel mode \"%s\"\n", *argv); |
| exit(-1); |
| } |
| } else if (strcmp(*argv, "remote") == 0) { |
| inet_prefix raddr; |
| NEXT_ARG(); |
| get_prefix(&raddr, *argv, preferred_family); |
| if (raddr.family == AF_UNSPEC) |
| invarg("\"remote\" address family is AF_UNSPEC", *argv); |
| memcpy(&p->raddr, &raddr.data, sizeof(p->raddr)); |
| } else if (strcmp(*argv, "local") == 0) { |
| inet_prefix laddr; |
| NEXT_ARG(); |
| get_prefix(&laddr, *argv, preferred_family); |
| if (laddr.family == AF_UNSPEC) |
| invarg("\"local\" address family is AF_UNSPEC", *argv); |
| memcpy(&p->laddr, &laddr.data, sizeof(p->laddr)); |
| } else if (strcmp(*argv, "dev") == 0) { |
| NEXT_ARG(); |
| strncpy(medium, *argv, IFNAMSIZ - 1); |
| } else if (strcmp(*argv, "encaplimit") == 0) { |
| NEXT_ARG(); |
| if (strcmp(*argv, "none") == 0) { |
| p->flags |= IP6_TNL_F_IGN_ENCAP_LIMIT; |
| } else { |
| __u8 uval; |
| if (get_u8(&uval, *argv, 0) < -1) |
| invarg("invalid ELIM", *argv); |
| p->encap_limit = uval; |
| p->flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT; |
| } |
| } else if (strcmp(*argv, "hoplimit") == 0 || |
| strcmp(*argv, "ttl") == 0 || |
| strcmp(*argv, "hlim") == 0) { |
| __u8 uval; |
| NEXT_ARG(); |
| if (get_u8(&uval, *argv, 0)) |
| invarg("invalid TTL", *argv); |
| p->hop_limit = uval; |
| } else if (strcmp(*argv, "tclass") == 0 || |
| strcmp(*argv, "tc") == 0 || |
| strcmp(*argv, "tos") == 0 || |
| matches(*argv, "dsfield") == 0) { |
| __u8 uval; |
| NEXT_ARG(); |
| p->flowinfo &= ~IP6_FLOWINFO_TCLASS; |
| if (strcmp(*argv, "inherit") == 0) |
| p->flags |= IP6_TNL_F_USE_ORIG_TCLASS; |
| else { |
| if (get_u8(&uval, *argv, 16)) |
| invarg("invalid TClass", *argv); |
| p->flowinfo |= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS; |
| p->flags &= ~IP6_TNL_F_USE_ORIG_TCLASS; |
| } |
| } else if (strcmp(*argv, "flowlabel") == 0 || |
| strcmp(*argv, "fl") == 0) { |
| __u32 uval; |
| NEXT_ARG(); |
| p->flowinfo &= ~IP6_FLOWINFO_FLOWLABEL; |
| if (strcmp(*argv, "inherit") == 0) |
| p->flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL; |
| else { |
| if (get_u32(&uval, *argv, 16)) |
| invarg("invalid Flowlabel", *argv); |
| if (uval > 0xFFFFF) |
| invarg("invalid Flowlabel", *argv); |
| p->flowinfo |= htonl(uval) & IP6_FLOWINFO_FLOWLABEL; |
| p->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL; |
| } |
| } else if (strcmp(*argv, "dscp") == 0) { |
| NEXT_ARG(); |
| if (strcmp(*argv, "inherit") != 0) |
| invarg("not inherit", *argv); |
| p->flags |= IP6_TNL_F_RCV_DSCP_COPY; |
| } else if (strcmp(*argv, "key") == 0) { |
| NEXT_ARG(); |
| p->i_flags |= GRE_KEY; |
| p->o_flags |= GRE_KEY; |
| p->i_key = p->o_key = tnl_parse_key("key", *argv); |
| } else if (strcmp(*argv, "ikey") == 0) { |
| NEXT_ARG(); |
| p->i_flags |= GRE_KEY; |
| p->i_key = tnl_parse_key("ikey", *argv); |
| } else if (strcmp(*argv, "okey") == 0) { |
| NEXT_ARG(); |
| p->o_flags |= GRE_KEY; |
| p->o_key = tnl_parse_key("okey", *argv); |
| } 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, "name") == 0) { |
| NEXT_ARG(); |
| } else if (matches(*argv, "help") == 0) |
| usage(); |
| if (p->name[0]) |
| duparg2("name", *argv); |
| strncpy(p->name, *argv, IFNAMSIZ - 1); |
| if (cmd == SIOCCHGTUNNEL && count == 0) { |
| struct ip6_tnl_parm2 old_p; |
| memset(&old_p, 0, sizeof(old_p)); |
| if (tnl_get_ioctl(*argv, &old_p)) |
| return -1; |
| *p = old_p; |
| } |
| } |
| count++; |
| argc--; argv++; |
| } |
| if (medium[0]) { |
| p->link = ll_name_to_index(medium); |
| if (p->link == 0) { |
| fprintf(stderr, "Cannot find device \"%s\"\n", medium); |
| return -1; |
| } |
| } |
| return 0; |
| } |
| |
| static void ip6_tnl_parm_init(struct ip6_tnl_parm2 *p, int apply_default) |
| { |
| memset(p, 0, sizeof(*p)); |
| p->proto = IPPROTO_IPV6; |
| if (apply_default) { |
| p->hop_limit = DEFAULT_TNL_HOP_LIMIT; |
| p->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT; |
| } |
| } |
| |
| /* |
| * @p1: user specified parameter |
| * @p2: database entry |
| */ |
| static int ip6_tnl_parm_match(const struct ip6_tnl_parm2 *p1, |
| const struct ip6_tnl_parm2 *p2) |
| { |
| return ((!p1->link || p1->link == p2->link) && |
| (!p1->name[0] || strcmp(p1->name, p2->name) == 0) && |
| (memcmp(&p1->laddr, &in6addr_any, sizeof(p1->laddr)) == 0 || |
| memcmp(&p1->laddr, &p2->laddr, sizeof(p1->laddr)) == 0) && |
| (memcmp(&p1->raddr, &in6addr_any, sizeof(p1->raddr)) == 0 || |
| memcmp(&p1->raddr, &p2->raddr, sizeof(p1->raddr)) == 0) && |
| (!p1->proto || !p2->proto || p1->proto == p2->proto) && |
| (!p1->encap_limit || p1->encap_limit == p2->encap_limit) && |
| (!p1->hop_limit || p1->hop_limit == p2->hop_limit) && |
| (!(p1->flowinfo & IP6_FLOWINFO_TCLASS) || |
| !((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_TCLASS)) && |
| (!(p1->flowinfo & IP6_FLOWINFO_FLOWLABEL) || |
| !((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_FLOWLABEL)) && |
| (!p1->flags || (p1->flags & p2->flags))); |
| } |
| |
| static int do_tunnels_list(struct ip6_tnl_parm2 *p) |
| { |
| char buf[512]; |
| int err = -1; |
| FILE *fp = fopen("/proc/net/dev", "r"); |
| if (fp == NULL) { |
| perror("fopen"); |
| return -1; |
| } |
| |
| /* skip two lines at the begenning of the file */ |
| if (!fgets(buf, sizeof(buf), fp) || |
| !fgets(buf, sizeof(buf), fp)) { |
| fprintf(stderr, "/proc/net/dev read error\n"); |
| goto end; |
| } |
| |
| while (fgets(buf, sizeof(buf), fp) != NULL) { |
| char name[IFNAMSIZ]; |
| int index, type; |
| struct ip6_tnl_parm2 p1; |
| char *ptr; |
| |
| buf[sizeof(buf) - 1] = '\0'; |
| if ((ptr = strchr(buf, ':')) == NULL || |
| (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) { |
| fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n"); |
| goto end; |
| } |
| if (p->name[0] && strcmp(p->name, name)) |
| continue; |
| index = ll_name_to_index(name); |
| if (index == 0) |
| continue; |
| type = ll_index_to_type(index); |
| if (type == -1) { |
| fprintf(stderr, "Failed to get type of \"%s\"\n", name); |
| continue; |
| } |
| if (type != ARPHRD_TUNNEL6 && type != ARPHRD_IP6GRE) |
| continue; |
| memset(&p1, 0, sizeof(p1)); |
| ip6_tnl_parm_init(&p1, 0); |
| if (type == ARPHRD_IP6GRE) |
| p1.proto = IPPROTO_GRE; |
| strcpy(p1.name, name); |
| p1.link = ll_name_to_index(p1.name); |
| if (p1.link == 0) |
| continue; |
| if (tnl_get_ioctl(p1.name, &p1)) |
| continue; |
| if (!ip6_tnl_parm_match(p, &p1)) |
| continue; |
| print_tunnel(&p1); |
| if (show_stats) |
| tnl_print_stats(ptr); |
| printf("\n"); |
| } |
| err = 0; |
| end: |
| fclose(fp); |
| return err; |
| } |
| |
| static int do_show(int argc, char **argv) |
| { |
| struct ip6_tnl_parm2 p; |
| |
| ll_init_map(&rth); |
| ip6_tnl_parm_init(&p, 0); |
| p.proto = 0; /* default to any */ |
| |
| if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0) |
| return -1; |
| |
| if (!p.name[0] || show_stats) |
| do_tunnels_list(&p); |
| else { |
| if (tnl_get_ioctl(p.name, &p)) |
| return -1; |
| print_tunnel(&p); |
| printf("\n"); |
| } |
| |
| return 0; |
| } |
| |
| static int do_add(int cmd, int argc, char **argv) |
| { |
| struct ip6_tnl_parm2 p; |
| const char *basedev = "ip6tnl0"; |
| |
| ip6_tnl_parm_init(&p, 1); |
| |
| if (parse_args(argc, argv, cmd, &p) < 0) |
| return -1; |
| |
| if (p.proto == IPPROTO_GRE) |
| basedev = "ip6gre0"; |
| else if (p.i_flags & VTI_ISVTI) |
| basedev = "ip6_vti0"; |
| |
| return tnl_add_ioctl(cmd, basedev, p.name, &p); |
| } |
| |
| static int do_del(int argc, char **argv) |
| { |
| struct ip6_tnl_parm2 p; |
| const char *basedev = "ip6tnl0"; |
| |
| ip6_tnl_parm_init(&p, 1); |
| |
| if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0) |
| return -1; |
| |
| if (p.proto == IPPROTO_GRE) |
| basedev = "ip6gre0"; |
| else if (p.i_flags & VTI_ISVTI) |
| basedev = "ip6_vti0"; |
| |
| return tnl_del_ioctl(basedev, p.name, &p); |
| } |
| |
| int do_ip6tunnel(int argc, char **argv) |
| { |
| switch (preferred_family) { |
| case AF_UNSPEC: |
| preferred_family = AF_INET6; |
| break; |
| case AF_INET6: |
| break; |
| default: |
| fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family); |
| exit(-1); |
| } |
| |
| 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, "delete") == 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 -f inet6 tunnel help\".\n", *argv); |
| exit(-1); |
| } |