83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
|
|
#include <libmnl/libmnl.h>
|
|
#include <net/if.h>
|
|
#include <linux/if_link.h>
|
|
#include <linux/rtnetlink.h>
|
|
|
|
#include <libgtpnl/gtpnl.h>
|
|
|
|
#include <linux/gtp_nl.h>
|
|
|
|
#include "internal.h"
|
|
|
|
int gtp_dev_create(const char *ifname)
|
|
{
|
|
struct mnl_socket *nl;
|
|
char buf[MNL_SOCKET_BUFFER_SIZE];
|
|
struct nlmsghdr *nlh;
|
|
struct ifinfomsg *ifm;
|
|
int ret;
|
|
unsigned int seq, portid;
|
|
struct nlattr *nest, *nest2;
|
|
|
|
nlh = mnl_nlmsg_put_header(buf);
|
|
nlh->nlmsg_type = RTM_NEWLINK;
|
|
nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
|
|
nlh->nlmsg_seq = seq = time(NULL);
|
|
ifm = mnl_nlmsg_put_extra_header(nlh, sizeof(*ifm));
|
|
ifm->ifi_family = AF_INET;
|
|
ifm->ifi_change |= IFF_UP;
|
|
ifm->ifi_flags |= IFF_UP;
|
|
|
|
mnl_attr_put_u32(nlh, IFLA_LINK, if_nametoindex(ifname));
|
|
nest = mnl_attr_nest_start(nlh, IFLA_LINKINFO);
|
|
mnl_attr_put_str(nlh, IFLA_INFO_KIND, "gtp");
|
|
nest2 = mnl_attr_nest_start(nlh, IFLA_INFO_DATA);
|
|
mnl_attr_put_u32(nlh, IFLA_GTP_LOCAL_ADDR_IPV4, 0);
|
|
mnl_attr_put_u32(nlh, IFLA_GTP_HASHSIZE, 131072);
|
|
mnl_attr_nest_end(nlh, nest2);
|
|
mnl_attr_nest_end(nlh, nest);
|
|
|
|
nl = mnl_socket_open(NETLINK_ROUTE);
|
|
if (nl == NULL) {
|
|
perror("mnl_socket_open");
|
|
return -1;
|
|
}
|
|
|
|
if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
|
|
perror("mnl_socket_bind");
|
|
return -1;
|
|
}
|
|
portid = mnl_socket_get_portid(nl);
|
|
|
|
mnl_nlmsg_fprintf(stdout, nlh, nlh->nlmsg_len,
|
|
sizeof(struct ifinfomsg));
|
|
|
|
if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
|
|
perror("mnl_socket_send");
|
|
return -1;
|
|
}
|
|
|
|
ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
|
|
if (ret == -1) {
|
|
perror("read");
|
|
return -1;
|
|
}
|
|
|
|
ret = mnl_cb_run(buf, ret, seq, portid, NULL, NULL);
|
|
if (ret == -1){
|
|
perror("callback");
|
|
return -1;
|
|
}
|
|
|
|
mnl_socket_close(nl);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gtp_dev_create);
|