From 3f69d23e0e4181ee91332da6060d943f82c698a0 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 19 Mar 2013 13:32:04 +0100 Subject: examples: add genl-group-events Signed-off-by: Pablo Neira Ayuso --- examples/genl/Makefile.am | 6 +++- examples/genl/genl-group-events.c | 63 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 68 insertions(+), 1 deletion(-) create mode 100644 examples/genl/genl-group-events.c diff --git a/examples/genl/Makefile.am b/examples/genl/Makefile.am index deaf18d..b4b7954 100644 --- a/examples/genl/Makefile.am +++ b/examples/genl/Makefile.am @@ -1,6 +1,10 @@ include $(top_srcdir)/Make_global.am -check_PROGRAMS = genl-family-get +check_PROGRAMS = genl-family-get \ + genl-group-events genl_family_get_SOURCES = genl-family-get.c genl_family_get_LDADD = ../../src/libmnl.la + +genl_group_events_SOURCES = genl-group-events.c +genl_group_events_LDADD = ../../src/libmnl.la diff --git a/examples/genl/genl-group-events.c b/examples/genl/genl-group-events.c new file mode 100644 index 0000000..d5f0a18 --- /dev/null +++ b/examples/genl/genl-group-events.c @@ -0,0 +1,63 @@ +/* This example is placed in the public domain. */ +#include +#include +#include +#include + +#include +#include + +static int group; + +static int data_cb(const struct nlmsghdr *nlh, void *data) +{ + printf("received event type=%d from genetlink group %d\n", + nlh->nlmsg_type, group); + return MNL_CB_OK; +} + +int main(int argc, char *argv[]) +{ + struct mnl_socket *nl; + char buf[MNL_SOCKET_BUFFER_SIZE]; + int ret; + + if (argc != 2) { + printf("%s [group]\n", argv[0]); + exit(EXIT_FAILURE); + } + group = atoi(argv[1]); + + nl = mnl_socket_open(NETLINK_GENERIC); + if (nl == NULL) { + perror("mnl_socket_open"); + exit(EXIT_FAILURE); + } + + if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) { + perror("mnl_socket_bind"); + exit(EXIT_FAILURE); + } + + if (mnl_socket_setsockopt(nl, NETLINK_ADD_MEMBERSHIP, &group, + sizeof(int)) < 0) { + perror("mnl_socket_setsockopt"); + exit(EXIT_FAILURE); + } + + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + while (ret > 0) { + ret = mnl_cb_run(buf, ret, 0, 0, data_cb, NULL); + if (ret <= 0) + break; + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + } + if (ret == -1) { + perror("error"); + exit(EXIT_FAILURE); + } + + mnl_socket_close(nl); + + return 0; +} -- cgit v1.2.3