diff options
Diffstat (limited to 'src/nl-route-get.c')
-rw-r--r-- | src/nl-route-get.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/nl-route-get.c b/src/nl-route-get.c new file mode 100644 index 0000000..fd7a503 --- /dev/null +++ b/src/nl-route-get.c @@ -0,0 +1,106 @@ +/* + * src/nl-route-get.c Get Route Attributes + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation version 2.1 + * of the License. + * + * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch> + */ + +#include "utils.h" + +static void print_usage(void) +{ + printf("Usage: nl-route-get <addr>\n"); + exit(1); +} + +static int cb(struct nl_msg *msg, void *arg) +{ + nl_cache_parse_and_add(arg, msg); + + return 0; +} + +int main(int argc, char *argv[]) +{ + struct nl_handle *nlh; + struct nl_cache *link_cache, *route_cache; + struct nl_addr *dst; + struct nl_dump_params params = { + .dp_fd = stdout, + .dp_type = NL_DUMP_BRIEF + }; + int err = 1; + + if (argc < 2 || !strcmp(argv[1], "-h")) + print_usage(); + + if (nltool_init(argc, argv) < 0) + goto errout; + + nlh = nltool_alloc_handle(); + if (!nlh) + goto errout; + + if (nltool_connect(nlh, NETLINK_ROUTE) < 0) + goto errout_free_handle; + + link_cache = nltool_alloc_link_cache(nlh); + if (!link_cache) + goto errout_close; + + dst = nltool_addr_parse(argv[1]); + if (!dst) + goto errout_link_cache; + + route_cache = nltool_alloc_route_cache(nlh); + if (!route_cache) + goto errout_addr_put; + + { + struct nl_msg *m; + struct rtmsg rmsg = { + .rtm_family = nl_addr_get_family(dst), + .rtm_dst_len = nl_addr_get_prefixlen(dst), + }; + + m = nlmsg_alloc_simple(RTM_GETROUTE, 0); + nlmsg_append(m, &rmsg, sizeof(rmsg), NLMSG_ALIGNTO); + nla_put_addr(m, RTA_DST, dst); + + if ((err = nl_send_auto_complete(nlh, m)) < 0) { + nlmsg_free(m); + fprintf(stderr, "%s\n", nl_geterror()); + goto errout_route_cache; + } + + nlmsg_free(m); + + nl_socket_modify_cb(nlh, NL_CB_VALID, NL_CB_CUSTOM, cb, + route_cache); + + if (nl_recvmsgs_default(nlh) < 0) { + fprintf(stderr, "%s\n", nl_geterror()); + goto errout_route_cache; + } + } + + nl_cache_dump(route_cache, ¶ms); + + err = 0; +errout_route_cache: + nl_cache_free(route_cache); +errout_addr_put: + nl_addr_put(dst); +errout_link_cache: + nl_cache_free(link_cache); +errout_close: + nl_close(nlh); +errout_free_handle: + nl_handle_destroy(nlh); +errout: + return err; +} |