1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3 * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
4 */
5
6 #include <netlink/cli/utils.h>
7 #include <netlink/cli/route.h>
8 #include <netlink/cli/link.h>
9
10 #include <linux/rtnetlink.h>
11
print_usage(void)12 static void print_usage(void)
13 {
14 printf("Usage: nl-route-get <addr>\n");
15 exit(1);
16 }
17
parse_cb(struct nl_object * obj,void * arg)18 static void parse_cb(struct nl_object *obj, void *arg)
19 {
20 //struct rtnl_route *route = (struct rtnl_route *) obj;
21 struct nl_dump_params params = {
22 .dp_fd = stdout,
23 .dp_type = NL_DUMP_DETAILS,
24 };
25
26 nl_object_dump(obj, ¶ms);
27 }
28
cb(struct nl_msg * msg,void * arg)29 static int cb(struct nl_msg *msg, void *arg)
30 {
31 int err;
32
33 if ((err = nl_msg_parse(msg, &parse_cb, NULL)) < 0)
34 nl_cli_fatal(err, "Unable to parse object: %s", nl_geterror(err));
35
36 return 0;
37 }
38
main(int argc,char * argv[])39 int main(int argc, char *argv[])
40 {
41 struct nl_sock *sock;
42 struct nl_addr *dst;
43 int err = 1;
44
45 if (argc < 2 || !strcmp(argv[1], "-h"))
46 print_usage();
47
48 sock = nl_cli_alloc_socket();
49 nl_cli_connect(sock, NETLINK_ROUTE);
50 nl_cli_link_alloc_cache(sock);
51 nl_cli_route_alloc_cache(sock, 0);
52
53 dst = nl_cli_addr_parse(argv[1], AF_INET);
54
55 {
56 struct nl_msg *m;
57 struct rtmsg rmsg = {
58 .rtm_family = nl_addr_get_family(dst),
59 .rtm_dst_len = nl_addr_get_prefixlen(dst),
60 };
61
62 m = nlmsg_alloc_simple(RTM_GETROUTE, 0);
63 if (!m)
64 nl_cli_fatal(ENOMEM, "out of memory");
65 if (nlmsg_append(m, &rmsg, sizeof(rmsg), NLMSG_ALIGNTO) < 0)
66 nl_cli_fatal(ENOMEM, "out of memory");
67 if (nla_put_addr(m, RTA_DST, dst) < 0)
68 nl_cli_fatal(ENOMEM, "out of memory");
69
70 err = nl_send_auto_complete(sock, m);
71 nlmsg_free(m);
72 if (err < 0)
73 nl_cli_fatal(err, "%s", nl_geterror(err));
74
75 nl_socket_modify_cb(sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
76
77 if (nl_recvmsgs_default(sock) < 0)
78 nl_cli_fatal(err, "%s", nl_geterror(err));
79 }
80
81 return 0;
82 }
83