Attachment 686820 Details for Bug 887992 – Test app using libnl-3 calls

Test app using libnl-3 calls

mulicast-listener.c (text/x-csrc), 1.53 KB, created by Richard Guy Briggs on 2013-01-24 14:57:57 UTC

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Creator: Richard Guy Briggs

Created: 2013-01-24 14:57:57 UTC

Size: 1.53 KB

patch

obsolete

>#include <netlink/netlink.h>
>#include <netlink/socket.h>
>#include <netlink/msg.h>
>#include <stdio.h>
>#define HAVE_LIBCAP_NG
>#ifdef HAVE_LIBCAP_NG
>#include <cap-ng.h>
>#endif
>#ifndef CAP_AUDIT_READ
>#define CAP_AUDIT_READ	37
>#endif
>
>/*
> *  * This function will be called for each valid netlink message received
> *   * in nl_recvmsgs_default()
> *    */
>static int my_func(struct nl_msg *msg, void *arg)
>{
>	char *data;
>	struct nlmsghdr *nlh;
>
>	arg = arg; //shut up gcc
>
>	nlh = nlmsg_hdr(msg);
>
>	data = NLMSG_DATA(nlh);
>	printf("%s\n", data);
>	return 0;
>}
>
>int main(void)
>{
>	struct nl_sock *sk;
>
>#ifdef HAVE_LIBCAP_NG
>	/* Drop capabilities */
>	capng_clear(CAPNG_SELECT_BOTH);
>	capng_update(CAPNG_ADD,
>			CAPNG_EFFECTIVE|CAPNG_PERMITTED|CAPNG_BOUNDING_SET,
>			CAP_AUDIT_READ);
>	capng_apply(CAPNG_SELECT_BOTH);
>#endif
>	
>	/* Allocate a new socket */
>	sk = nl_socket_alloc();
>
>	/*
>	 * Notifications do not use sequence numbers, disable sequence number
>	 * checking.
>	 */
>	nl_socket_disable_seq_check(sk);
>
>	/*
>	 * Define a callback function, which will be called for each notification
>	 * received
>	 */
>	nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, my_func, NULL);
>
>	/* Connect to routing netlink protocol */
>	nl_connect(sk, NETLINK_AUDIT);
>
>	/* Subscribe to link notifications group */
>	nl_socket_add_memberships(sk, 1, 0);
>
>	/*
>	 * Start receiving messages. The function nl_recvmsgs_default() will block
>	 * until one or more netlink messages (notification) are received which
>	 * will be passed on to my_func().
>	 */
>	while (1)
>		nl_recvmsgs_default(sk);
>
>	return 0;
>}

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Attachments on bug 887992: 686259 | 686801 | 686820