diff options
Diffstat (limited to 'src/nl-monitor.c')
-rw-r--r-- | src/nl-monitor.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/src/nl-monitor.c b/src/nl-monitor.c new file mode 100644 index 0000000..9f21dbb --- /dev/null +++ b/src/nl-monitor.c @@ -0,0 +1,135 @@ +/* + * src/nl-monitor.c Monitor events + * + * 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" +#include <netlink/route/link.h> +#include <netlink/route/addr.h> + +static void obj_input(struct nl_object *obj, void *arg) +{ + struct nl_dump_params dp = { + .dp_type = NL_DUMP_STATS, + .dp_fd = stdout, + .dp_dump_msgtype = 1, + }; + + nl_object_dump(obj, &dp); +} + +static int event_input(struct nl_msg *msg, void *arg) +{ + if (nl_msg_parse(msg, &obj_input, NULL) < 0) + fprintf(stderr, "<<EVENT>> Unknown message type\n"); + + /* Exit nl_recvmsgs_def() and return to the main select() */ + return NL_STOP; +} + +int main(int argc, char *argv[]) +{ + struct nl_handle *nlh; + struct nl_cache *link_cache; + int err = 1; + int i, idx; + + static const struct { + enum rtnetlink_groups gr_id; + const char* gr_name; + } known_groups[] = { + { RTNLGRP_LINK, "link" }, + { RTNLGRP_NOTIFY, "notify" }, + { RTNLGRP_NEIGH, "neigh" }, + { RTNLGRP_TC, "tc" }, + { RTNLGRP_IPV4_IFADDR, "ipv4-ifaddr" }, + { RTNLGRP_IPV4_MROUTE, "ipv4-mroute" }, + { RTNLGRP_IPV4_ROUTE, "ipv4-route" }, + { RTNLGRP_IPV6_IFADDR, "ipv6-ifaddr" }, + { RTNLGRP_IPV6_MROUTE, "ipv6-mroute" }, + { RTNLGRP_IPV6_ROUTE, "ipv6-route" }, + { RTNLGRP_IPV6_IFINFO, "ipv6-ifinfo" }, + { RTNLGRP_DECnet_IFADDR, "decnet-ifaddr" }, + { RTNLGRP_DECnet_ROUTE, "decnet-route" }, + { RTNLGRP_IPV6_PREFIX, "ipv6-prefix" }, + { RTNLGRP_NONE, NULL } + }; + + if (nltool_init(argc, argv) < 0) + return -1; + + nlh = nltool_alloc_handle(); + if (nlh == NULL) + return -1; + + nl_disable_sequence_check(nlh); + + nl_socket_modify_cb(nlh, NL_CB_VALID, NL_CB_CUSTOM, event_input, NULL); + + if (argc > 1 && !strcasecmp(argv[1], "-h")) { + printf("Usage: nl-monitor [<groups>]\n"); + + printf("Known groups:"); + for (i = 0; known_groups[i].gr_id != RTNLGRP_NONE; i++) + printf(" %s", known_groups[i].gr_name); + printf("\n"); + return 2; + } + + if (nl_connect(nlh, NETLINK_ROUTE) < 0) { + fprintf(stderr, "%s\n", nl_geterror()); + goto errout; + } + + for (idx = 1; argc > idx; idx++) { + for (i = 0; known_groups[i].gr_id != RTNLGRP_NONE; i++) { + if (!strcmp(argv[idx], known_groups[i].gr_name)) { + + if (nl_socket_add_membership(nlh, known_groups[i].gr_id) < 0) { + fprintf(stderr, "%s: %s\n", argv[idx], nl_geterror()); + goto errout; + } + + break; + } + } + if (known_groups[i].gr_id == RTNLGRP_NONE) + fprintf(stderr, "Warning: Unknown group: %s\n", argv[idx]); + } + + if ((link_cache = rtnl_link_alloc_cache(nlh)) == NULL) { + fprintf(stderr, "%s\n", nl_geterror()); + goto errout_close; + } + + nl_cache_mngt_provide(link_cache); + + while (1) { + fd_set rfds; + int fd, retval; + + fd = nl_socket_get_fd(nlh); + + FD_ZERO(&rfds); + FD_SET(fd, &rfds); + /* wait for an incoming message on the netlink socket */ + retval = select(fd+1, &rfds, NULL, NULL, NULL); + + if (retval) { + /* FD_ISSET(fd, &rfds) will be true */ + nl_recvmsgs_default(nlh); + } + } + + nl_cache_free(link_cache); +errout_close: + nl_close(nlh); +errout: + return err; +} |