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