| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <time.h> |
| #include <arpa/inet.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| |
| #include <libmnl/libmnl.h> |
| #include <linux/genetlink.h> |
| |
| #include <linux/gtp_nl.h> |
| #include <libgtpnl/gtpnl.h> |
| |
| static int |
| add_tunnel(int argc, char *argv[], int genl_id, struct mnl_socket *nl) |
| { |
| uint32_t gtp_ifidx; |
| struct in_addr ms, sgsn; |
| struct nlmsghdr *nlh; |
| char buf[MNL_SOCKET_BUFFER_SIZE]; |
| uint32_t seq = time(NULL), gtp_version; |
| |
| if (argc != 7) { |
| printf("%s add <gtp device> <v0|v1> <tid> <ms-addr> <sgsn-addr>\n", |
| argv[0]); |
| return EXIT_FAILURE; |
| } |
| gtp_ifidx = if_nametoindex(argv[2]); |
| if (gtp_ifidx == 0) { |
| fprintf(stderr, "wrong GTP interface %s\n", argv[2]); |
| return EXIT_FAILURE; |
| } |
| |
| if (inet_aton(argv[5], &ms) < 0) { |
| perror("bad address for ms"); |
| exit(EXIT_FAILURE); |
| } |
| |
| if (inet_aton(argv[6], &sgsn) < 0) { |
| perror("bad address for sgsn"); |
| exit(EXIT_FAILURE); |
| } |
| |
| if (strcmp(argv[3], "v0") == 0) |
| gtp_version = GTP_V0; |
| else if (strcmp(argv[3], "v1") == 0) |
| gtp_version = GTP_V1; |
| else { |
| fprintf(stderr, "wrong GTP version %s, use v0 or v1\n", |
| argv[3]); |
| return EXIT_FAILURE; |
| } |
| |
| nlh = genl_nlmsg_build_hdr(buf, genl_id, NLM_F_EXCL | NLM_F_ACK, ++seq, |
| GTP_CMD_TUNNEL_NEW); |
| gtp_build_payload(nlh, atoi(argv[4]), gtp_ifidx, sgsn.s_addr, |
| ms.s_addr, gtp_version); |
| |
| if (genl_socket_talk(nl, nlh, seq, NULL, NULL) < 0) |
| perror("genl_socket_talk"); |
| |
| return 0; |
| } |
| |
| static int |
| del_tunnel(int argc, char *argv[], int genl_id, struct mnl_socket *nl) |
| { |
| uint32_t gtp_ifidx; |
| char buf[MNL_SOCKET_BUFFER_SIZE]; |
| struct nlmsghdr *nlh; |
| uint32_t seq = time(NULL); |
| |
| if (argc != 5) { |
| printf("%s add <gtp device> <version> <tid>\n", |
| argv[0]); |
| return EXIT_FAILURE; |
| } |
| |
| gtp_ifidx = if_nametoindex(argv[2]); |
| |
| nlh = genl_nlmsg_build_hdr(buf, genl_id, NLM_F_ACK, ++seq, |
| GTP_CMD_TUNNEL_DELETE); |
| gtp_build_payload(nlh, atoi(argv[4]), gtp_ifidx, 0, 0, atoi(argv[3])); |
| |
| if (genl_socket_talk(nl, nlh, seq, NULL, NULL) < 0) |
| perror("genl_socket_talk"); |
| |
| return 0; |
| } |
| |
| struct gtp_pdp { |
| uint32_t version; |
| uint64_t tid; |
| struct in_addr sgsn_addr; |
| struct in_addr ms_addr; |
| }; |
| |
| static int genl_gtp_validate_cb(const struct nlattr *attr, void *data) |
| { |
| const struct nlattr **tb = data; |
| int type = mnl_attr_get_type(attr); |
| |
| if (mnl_attr_type_valid(attr, CTRL_ATTR_MAX) < 0) |
| return MNL_CB_OK; |
| |
| switch(type) { |
| case GTPA_TID: |
| if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0) { |
| perror("mnl_attr_validate"); |
| return MNL_CB_ERROR; |
| } |
| break; |
| case GTPA_SGSN_ADDRESS: |
| case GTPA_MS_ADDRESS: |
| case GTPA_VERSION: |
| if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) { |
| perror("mnl_attr_validate"); |
| return MNL_CB_ERROR; |
| } |
| break; |
| default: |
| break; |
| } |
| tb[type] = attr; |
| return MNL_CB_OK; |
| } |
| |
| static int genl_gtp_attr_cb(const struct nlmsghdr *nlh, void *data) |
| { |
| struct nlattr *tb[GTPA_MAX + 1] = {}; |
| struct gtp_pdp pdp; |
| struct genlmsghdr *genl; |
| |
| mnl_attr_parse(nlh, sizeof(*genl), genl_gtp_validate_cb, tb); |
| if (tb[GTPA_TID]) |
| pdp.tid = mnl_attr_get_u64(tb[GTPA_TID]); |
| if (tb[GTPA_SGSN_ADDRESS]) { |
| pdp.sgsn_addr.s_addr = |
| mnl_attr_get_u32(tb[GTPA_SGSN_ADDRESS]); |
| } |
| if (tb[GTPA_MS_ADDRESS]) { |
| pdp.ms_addr.s_addr = mnl_attr_get_u32(tb[GTPA_MS_ADDRESS]); |
| } |
| if (tb[GTPA_VERSION]) { |
| pdp.version = mnl_attr_get_u32(tb[GTPA_VERSION]); |
| } |
| |
| printf("version %u ", pdp.version); |
| printf("tid %llx ms_addr %s ", pdp.tid, inet_ntoa(pdp.ms_addr)); |
| printf("sgsn_addr %s\n", inet_ntoa(pdp.sgsn_addr)); |
| |
| return MNL_CB_OK; |
| } |
| |
| static int |
| list_tunnel(int argc, char *argv[], int genl_id, struct mnl_socket *nl) |
| { |
| char buf[MNL_SOCKET_BUFFER_SIZE]; |
| struct nlmsghdr *nlh; |
| uint32_t seq = time(NULL); |
| |
| nlh = genl_nlmsg_build_hdr(buf, genl_id, NLM_F_DUMP, 0, |
| GTP_CMD_TUNNEL_GET); |
| |
| if (genl_socket_talk(nl, nlh, seq, genl_gtp_attr_cb, NULL) < 0) { |
| perror("genl_socket_talk"); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| struct mnl_socket *nl; |
| char buf[MNL_SOCKET_BUFFER_SIZE]; |
| unsigned int portid; |
| int32_t genl_id; |
| int ret; |
| |
| if (argc < 2) { |
| printf("%s <add|delete|list> [<options,...>]\n", argv[0]); |
| exit(EXIT_FAILURE); |
| } |
| |
| nl = genl_socket_open(); |
| if (nl == NULL) { |
| perror("mnl_socket_open"); |
| exit(EXIT_FAILURE); |
| } |
| |
| genl_id = genl_lookup_family(nl, "gtp"); |
| if (genl_id < 0) { |
| printf("not found gtp genl family\n"); |
| exit(EXIT_FAILURE); |
| } |
| |
| if (strncmp(argv[1], "add", strlen(argv[1])) == 0) |
| ret = add_tunnel(argc, argv, genl_id, nl); |
| else if (strncmp(argv[1], "delete", strlen(argv[1])) == 0) |
| ret = del_tunnel(argc, argv, genl_id, nl); |
| else if (strncmp(argv[1], "list", strlen(argv[1])) == 0) |
| ret = list_tunnel(argc, argv, genl_id, nl); |
| else { |
| printf("Unknown command `%s'\n", argv[1]); |
| exit(EXIT_FAILURE); |
| } |
| |
| mnl_socket_close(nl); |
| |
| return ret; |
| } |