1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3 * Copyright (c) 2003-2009 Thomas Graf <[email protected]>
4 */
5
6 #include "nl-default.h"
7
8 #include <linux/rtnetlink.h>
9
10 #include <netlink/cli/utils.h>
11 #include <netlink/cli/route.h>
12 #include <netlink/cli/link.h>
13
print_usage(void)14 static void print_usage(void)
15 {
16 printf("Usage: nl-route-get <addr>\n");
17 exit(1);
18 }
19
parse_cb(struct nl_object * obj,void * arg)20 static void parse_cb(struct nl_object *obj, void *arg)
21 {
22 //struct rtnl_route *route = (struct rtnl_route *) obj;
23 struct nl_dump_params params = {
24 .dp_fd = stdout,
25 .dp_type = NL_DUMP_DETAILS,
26 };
27
28 nl_object_dump(obj, ¶ms);
29 }
30
cb(struct nl_msg * msg,void * arg)31 static int cb(struct nl_msg *msg, void *arg)
32 {
33 int err;
34
35 if ((err = nl_msg_parse(msg, &parse_cb, NULL)) < 0)
36 nl_cli_fatal(err, "Unable to parse object: %s", nl_geterror(err));
37
38 return 0;
39 }
40
main(int argc,char * argv[])41 int main(int argc, char *argv[])
42 {
43 struct nl_sock *sock;
44 struct nl_addr *dst;
45 int err = 1;
46
47 if (argc < 2 || !strcmp(argv[1], "-h"))
48 print_usage();
49
50 sock = nl_cli_alloc_socket();
51 nl_cli_connect(sock, NETLINK_ROUTE);
52 nl_cli_link_alloc_cache(sock);
53 nl_cli_route_alloc_cache(sock, 0);
54
55 dst = nl_cli_addr_parse(argv[1], AF_INET);
56
57 {
58 struct nl_msg *m;
59 struct rtmsg rmsg = {
60 .rtm_family = nl_addr_get_family(dst),
61 .rtm_dst_len = nl_addr_get_prefixlen(dst),
62 };
63
64 m = nlmsg_alloc_simple(RTM_GETROUTE, 0);
65 if (!m)
66 nl_cli_fatal(ENOMEM, "out of memory");
67 if (nlmsg_append(m, &rmsg, sizeof(rmsg), NLMSG_ALIGNTO) < 0)
68 nl_cli_fatal(ENOMEM, "out of memory");
69 if (nla_put_addr(m, RTA_DST, dst) < 0)
70 nl_cli_fatal(ENOMEM, "out of memory");
71
72 err = nl_send_auto_complete(sock, m);
73 nlmsg_free(m);
74 if (err < 0)
75 nl_cli_fatal(err, "%s", nl_geterror(err));
76
77 nl_socket_modify_cb(sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
78
79 if (nl_recvmsgs_default(sock) < 0)
80 nl_cli_fatal(err, "%s", nl_geterror(err));
81 }
82
83 return 0;
84 }
85