mirror of
https://github.com/Waujito/youtubeUnblock.git
synced 2024-12-23 06:42:38 +00:00
96 lines
2.0 KiB
C
96 lines
2.0 KiB
C
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/* This example is placed in the public domain. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <libmnl/libmnl.h>
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#include <linux/if.h>
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#include <linux/if_link.h>
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#include <linux/rtnetlink.h>
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static int data_attr_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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/* skip unsupported attribute in user-space */
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if (mnl_attr_type_valid(attr, IFLA_MAX) < 0)
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return MNL_CB_OK;
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switch(type) {
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case IFLA_MTU:
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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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case IFLA_IFNAME:
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if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 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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}
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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 data_cb(const struct nlmsghdr *nlh, void *data)
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{
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struct nlattr *tb[IFLA_MAX+1] = {};
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struct ifinfomsg *ifm = mnl_nlmsg_get_payload(nlh);
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printf("index=%d type=%d flags=%d family=%d ",
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ifm->ifi_index, ifm->ifi_type,
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ifm->ifi_flags, ifm->ifi_family);
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if (ifm->ifi_flags & IFF_RUNNING)
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printf("[RUNNING] ");
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else
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printf("[NOT RUNNING] ");
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mnl_attr_parse(nlh, sizeof(*ifm), data_attr_cb, tb);
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if (tb[IFLA_MTU]) {
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printf("mtu=%d ", mnl_attr_get_u32(tb[IFLA_MTU]));
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}
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if (tb[IFLA_IFNAME]) {
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printf("name=%s", mnl_attr_get_str(tb[IFLA_IFNAME]));
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}
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printf("\n");
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return MNL_CB_OK;
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}
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int main(void)
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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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int ret;
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nl = mnl_socket_open(NETLINK_ROUTE);
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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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if (mnl_socket_bind(nl, RTMGRP_LINK, MNL_SOCKET_AUTOPID) < 0) {
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perror("mnl_socket_bind");
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exit(EXIT_FAILURE);
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}
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ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
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while (ret > 0) {
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ret = mnl_cb_run(buf, ret, 0, 0, data_cb, NULL);
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if (ret <= 0)
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break;
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ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
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}
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if (ret == -1) {
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perror("error");
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exit(EXIT_FAILURE);
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}
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mnl_socket_close(nl);
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return 0;
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}
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