Pablo Neira Ayuso | 1450666 | 2014-02-20 18:43:15 +0100 | [diff] [blame^] | 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <unistd.h> |
| 4 | #include <string.h> |
| 5 | #include <time.h> |
| 6 | |
| 7 | #include <libmnl/libmnl.h> |
| 8 | #include <linux/if.h> |
| 9 | #include <linux/if_link.h> |
| 10 | #include <linux/rtnetlink.h> |
| 11 | |
| 12 | #include <linux/gtp_nl.h> |
| 13 | |
| 14 | int main(int argc, char *argv[]) |
| 15 | { |
| 16 | struct mnl_socket *nl; |
| 17 | char buf[MNL_SOCKET_BUFFER_SIZE]; |
| 18 | struct nlmsghdr *nlh; |
| 19 | struct ifinfomsg *ifm; |
| 20 | int ret; |
| 21 | unsigned int seq, portid, change = 0, flags = 0; |
| 22 | struct nlattr *nest, *nest2; |
| 23 | |
| 24 | if (argc != 2) { |
| 25 | printf("Usage: %s [ifname]\n", argv[0]); |
| 26 | exit(EXIT_FAILURE); |
| 27 | } |
| 28 | |
| 29 | nlh = mnl_nlmsg_put_header(buf); |
| 30 | nlh->nlmsg_type = RTM_NEWLINK; |
| 31 | nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK; |
| 32 | nlh->nlmsg_seq = seq = time(NULL); |
| 33 | ifm = mnl_nlmsg_put_extra_header(nlh, sizeof(*ifm)); |
| 34 | ifm->ifi_family = AF_INET; |
| 35 | ifm->ifi_change |= IFF_UP; |
| 36 | ifm->ifi_flags |= IFF_UP; |
| 37 | |
| 38 | mnl_attr_put_u32(nlh, IFLA_LINK, if_nametoindex(argv[1])); |
| 39 | nest = mnl_attr_nest_start(nlh, IFLA_LINKINFO); |
| 40 | mnl_attr_put_str(nlh, IFLA_INFO_KIND, "gtp"); |
| 41 | nest2 = mnl_attr_nest_start(nlh, IFLA_INFO_DATA); |
| 42 | mnl_attr_put_u32(nlh, IFLA_GTP_LOCAL_ADDR_IPV4, 0); |
| 43 | mnl_attr_put_u32(nlh, IFLA_GTP_HASHSIZE, 131072); |
| 44 | mnl_attr_nest_end(nlh, nest2); |
| 45 | mnl_attr_nest_end(nlh, nest); |
| 46 | |
| 47 | nl = mnl_socket_open(NETLINK_ROUTE); |
| 48 | if (nl == NULL) { |
| 49 | perror("mnl_socket_open"); |
| 50 | exit(EXIT_FAILURE); |
| 51 | } |
| 52 | |
| 53 | if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) { |
| 54 | perror("mnl_socket_bind"); |
| 55 | exit(EXIT_FAILURE); |
| 56 | } |
| 57 | portid = mnl_socket_get_portid(nl); |
| 58 | |
| 59 | mnl_nlmsg_fprintf(stdout, nlh, nlh->nlmsg_len, |
| 60 | sizeof(struct ifinfomsg)); |
| 61 | |
| 62 | if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { |
| 63 | perror("mnl_socket_send"); |
| 64 | exit(EXIT_FAILURE); |
| 65 | } |
| 66 | |
| 67 | ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); |
| 68 | if (ret == -1) { |
| 69 | perror("read"); |
| 70 | exit(EXIT_FAILURE); |
| 71 | } |
| 72 | |
| 73 | ret = mnl_cb_run(buf, ret, seq, portid, NULL, NULL); |
| 74 | if (ret == -1){ |
| 75 | perror("callback"); |
| 76 | exit(EXIT_FAILURE); |
| 77 | } |
| 78 | |
| 79 | mnl_socket_close(nl); |
| 80 | |
| 81 | return 0; |
| 82 | } |