Harald Welte | 51b00a6 | 2014-04-03 09:37:38 -0400 | [diff] [blame^] | 1 | /* Command line utility to create GTP tunnels (PDP contexts) */ |
| 2 | |
| 3 | /* (C) 2014 by sysmocom - s.f.m.c. GmbH |
| 4 | * Author: Pablo Neira Ayuso <pablo@gnumonks.org> |
| 5 | * |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU Affero General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | * |
| 21 | */ |
| 22 | |
Pablo Neira Ayuso | 1450666 | 2014-02-20 18:43:15 +0100 | [diff] [blame] | 23 | #include <stdio.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | #include <unistd.h> |
| 27 | #include <time.h> |
| 28 | #include <arpa/inet.h> |
| 29 | #include <sys/socket.h> |
| 30 | #include <netinet/in.h> |
| 31 | |
| 32 | #include <libmnl/libmnl.h> |
| 33 | #include <linux/genetlink.h> |
| 34 | |
| 35 | #include <linux/gtp_nl.h> |
| 36 | #include <libgtpnl/gtpnl.h> |
| 37 | |
| 38 | static int |
| 39 | add_tunnel(int argc, char *argv[], int genl_id, struct mnl_socket *nl) |
| 40 | { |
| 41 | uint32_t gtp_ifidx; |
| 42 | struct in_addr ms, sgsn; |
| 43 | struct nlmsghdr *nlh; |
| 44 | char buf[MNL_SOCKET_BUFFER_SIZE]; |
| 45 | uint32_t seq = time(NULL), gtp_version; |
| 46 | |
| 47 | if (argc != 7) { |
| 48 | printf("%s add <gtp device> <v0|v1> <tid> <ms-addr> <sgsn-addr>\n", |
| 49 | argv[0]); |
| 50 | return EXIT_FAILURE; |
| 51 | } |
| 52 | gtp_ifidx = if_nametoindex(argv[2]); |
| 53 | if (gtp_ifidx == 0) { |
| 54 | fprintf(stderr, "wrong GTP interface %s\n", argv[2]); |
| 55 | return EXIT_FAILURE; |
| 56 | } |
| 57 | |
| 58 | if (inet_aton(argv[5], &ms) < 0) { |
| 59 | perror("bad address for ms"); |
| 60 | exit(EXIT_FAILURE); |
| 61 | } |
| 62 | |
| 63 | if (inet_aton(argv[6], &sgsn) < 0) { |
| 64 | perror("bad address for sgsn"); |
| 65 | exit(EXIT_FAILURE); |
| 66 | } |
| 67 | |
| 68 | if (strcmp(argv[3], "v0") == 0) |
| 69 | gtp_version = GTP_V0; |
| 70 | else if (strcmp(argv[3], "v1") == 0) |
| 71 | gtp_version = GTP_V1; |
| 72 | else { |
| 73 | fprintf(stderr, "wrong GTP version %s, use v0 or v1\n", |
| 74 | argv[3]); |
| 75 | return EXIT_FAILURE; |
| 76 | } |
| 77 | |
| 78 | nlh = genl_nlmsg_build_hdr(buf, genl_id, NLM_F_EXCL | NLM_F_ACK, ++seq, |
| 79 | GTP_CMD_TUNNEL_NEW); |
| 80 | gtp_build_payload(nlh, atoi(argv[4]), gtp_ifidx, sgsn.s_addr, |
| 81 | ms.s_addr, gtp_version); |
| 82 | |
| 83 | if (genl_socket_talk(nl, nlh, seq, NULL, NULL) < 0) |
| 84 | perror("genl_socket_talk"); |
| 85 | |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | static int |
| 90 | del_tunnel(int argc, char *argv[], int genl_id, struct mnl_socket *nl) |
| 91 | { |
| 92 | uint32_t gtp_ifidx; |
| 93 | char buf[MNL_SOCKET_BUFFER_SIZE]; |
| 94 | struct nlmsghdr *nlh; |
| 95 | uint32_t seq = time(NULL); |
| 96 | |
| 97 | if (argc != 5) { |
| 98 | printf("%s add <gtp device> <version> <tid>\n", |
| 99 | argv[0]); |
| 100 | return EXIT_FAILURE; |
| 101 | } |
| 102 | |
| 103 | gtp_ifidx = if_nametoindex(argv[2]); |
| 104 | |
| 105 | nlh = genl_nlmsg_build_hdr(buf, genl_id, NLM_F_ACK, ++seq, |
| 106 | GTP_CMD_TUNNEL_DELETE); |
| 107 | gtp_build_payload(nlh, atoi(argv[4]), gtp_ifidx, 0, 0, atoi(argv[3])); |
| 108 | |
| 109 | if (genl_socket_talk(nl, nlh, seq, NULL, NULL) < 0) |
| 110 | perror("genl_socket_talk"); |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | struct gtp_pdp { |
| 116 | uint32_t version; |
| 117 | uint64_t tid; |
| 118 | struct in_addr sgsn_addr; |
| 119 | struct in_addr ms_addr; |
| 120 | }; |
| 121 | |
| 122 | static int genl_gtp_validate_cb(const struct nlattr *attr, void *data) |
| 123 | { |
| 124 | const struct nlattr **tb = data; |
| 125 | int type = mnl_attr_get_type(attr); |
| 126 | |
| 127 | if (mnl_attr_type_valid(attr, CTRL_ATTR_MAX) < 0) |
| 128 | return MNL_CB_OK; |
| 129 | |
| 130 | switch(type) { |
| 131 | case GTPA_TID: |
| 132 | if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0) { |
| 133 | perror("mnl_attr_validate"); |
| 134 | return MNL_CB_ERROR; |
| 135 | } |
| 136 | break; |
| 137 | case GTPA_SGSN_ADDRESS: |
| 138 | case GTPA_MS_ADDRESS: |
| 139 | case GTPA_VERSION: |
| 140 | if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) { |
| 141 | perror("mnl_attr_validate"); |
| 142 | return MNL_CB_ERROR; |
| 143 | } |
| 144 | break; |
| 145 | default: |
| 146 | break; |
| 147 | } |
| 148 | tb[type] = attr; |
| 149 | return MNL_CB_OK; |
| 150 | } |
| 151 | |
| 152 | static int genl_gtp_attr_cb(const struct nlmsghdr *nlh, void *data) |
| 153 | { |
| 154 | struct nlattr *tb[GTPA_MAX + 1] = {}; |
| 155 | struct gtp_pdp pdp; |
| 156 | struct genlmsghdr *genl; |
| 157 | |
| 158 | mnl_attr_parse(nlh, sizeof(*genl), genl_gtp_validate_cb, tb); |
| 159 | if (tb[GTPA_TID]) |
| 160 | pdp.tid = mnl_attr_get_u64(tb[GTPA_TID]); |
| 161 | if (tb[GTPA_SGSN_ADDRESS]) { |
| 162 | pdp.sgsn_addr.s_addr = |
| 163 | mnl_attr_get_u32(tb[GTPA_SGSN_ADDRESS]); |
| 164 | } |
| 165 | if (tb[GTPA_MS_ADDRESS]) { |
| 166 | pdp.ms_addr.s_addr = mnl_attr_get_u32(tb[GTPA_MS_ADDRESS]); |
| 167 | } |
| 168 | if (tb[GTPA_VERSION]) { |
| 169 | pdp.version = mnl_attr_get_u32(tb[GTPA_VERSION]); |
| 170 | } |
| 171 | |
| 172 | printf("version %u ", pdp.version); |
Pablo Neira Ayuso | b0d712b | 2014-03-20 12:56:31 +0100 | [diff] [blame] | 173 | printf("tid %llx ms_addr %s ", pdp.tid, inet_ntoa(pdp.ms_addr)); |
Pablo Neira Ayuso | f8ca765 | 2014-02-22 22:38:05 +0100 | [diff] [blame] | 174 | printf("sgsn_addr %s\n", inet_ntoa(pdp.sgsn_addr)); |
Pablo Neira Ayuso | 1450666 | 2014-02-20 18:43:15 +0100 | [diff] [blame] | 175 | |
| 176 | return MNL_CB_OK; |
| 177 | } |
| 178 | |
| 179 | static int |
| 180 | list_tunnel(int argc, char *argv[], int genl_id, struct mnl_socket *nl) |
| 181 | { |
| 182 | char buf[MNL_SOCKET_BUFFER_SIZE]; |
| 183 | struct nlmsghdr *nlh; |
| 184 | uint32_t seq = time(NULL); |
| 185 | |
| 186 | nlh = genl_nlmsg_build_hdr(buf, genl_id, NLM_F_DUMP, 0, |
| 187 | GTP_CMD_TUNNEL_GET); |
| 188 | |
| 189 | if (genl_socket_talk(nl, nlh, seq, genl_gtp_attr_cb, NULL) < 0) { |
| 190 | perror("genl_socket_talk"); |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | int main(int argc, char *argv[]) |
| 198 | { |
| 199 | struct mnl_socket *nl; |
| 200 | char buf[MNL_SOCKET_BUFFER_SIZE]; |
| 201 | unsigned int portid; |
| 202 | int32_t genl_id; |
| 203 | int ret; |
| 204 | |
| 205 | if (argc < 2) { |
| 206 | printf("%s <add|delete|list> [<options,...>]\n", argv[0]); |
| 207 | exit(EXIT_FAILURE); |
| 208 | } |
| 209 | |
| 210 | nl = genl_socket_open(); |
| 211 | if (nl == NULL) { |
| 212 | perror("mnl_socket_open"); |
| 213 | exit(EXIT_FAILURE); |
| 214 | } |
| 215 | |
| 216 | genl_id = genl_lookup_family(nl, "gtp"); |
| 217 | if (genl_id < 0) { |
| 218 | printf("not found gtp genl family\n"); |
| 219 | exit(EXIT_FAILURE); |
| 220 | } |
| 221 | |
| 222 | if (strncmp(argv[1], "add", strlen(argv[1])) == 0) |
| 223 | ret = add_tunnel(argc, argv, genl_id, nl); |
| 224 | else if (strncmp(argv[1], "delete", strlen(argv[1])) == 0) |
| 225 | ret = del_tunnel(argc, argv, genl_id, nl); |
| 226 | else if (strncmp(argv[1], "list", strlen(argv[1])) == 0) |
| 227 | ret = list_tunnel(argc, argv, genl_id, nl); |
| 228 | else { |
| 229 | printf("Unknown command `%s'\n", argv[1]); |
| 230 | exit(EXIT_FAILURE); |
| 231 | } |
| 232 | |
| 233 | mnl_socket_close(nl); |
| 234 | |
| 235 | return ret; |
| 236 | } |