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author | Pablo Neira Ayuso <pablo@netfilter.org> | 2010-09-08 13:04:35 +0200 |
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committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2010-09-08 13:07:32 +0200 |
commit | 089d5e1c6a4fcd6615b02866b760f2d7b4084a08 (patch) | |
tree | 607b14e964297f19a84f904fe8f896e142853e70 /examples/rtnl/rtnl-link-set.c | |
parent | 2a67cbdd18d23612a49435e251fb0c853388b0e8 (diff) |
examples: put examples files into specific directories
put examples files into specific directories according to the
Netlink bus they work with. And minor update in the readme file
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'examples/rtnl/rtnl-link-set.c')
-rw-r--r-- | examples/rtnl/rtnl-link-set.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/examples/rtnl/rtnl-link-set.c b/examples/rtnl/rtnl-link-set.c new file mode 100644 index 0000000..d5cf9b1 --- /dev/null +++ b/examples/rtnl/rtnl-link-set.c @@ -0,0 +1,88 @@ +/* + * (C) 2009-2010 by Pablo Neira Ayuso <pablo@netfilter.org> + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + */ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <time.h> + +#include <libmnl/libmnl.h> +#include <linux/if.h> +#include <linux/if_link.h> +#include <linux/rtnetlink.h> + +int main(int argc, char *argv[]) +{ + struct mnl_socket *nl; + char buf[getpagesize()]; + struct nlmsghdr *nlh; + struct ifinfomsg *ifm; + int ret; + unsigned int seq, portid, change = 0, flags = 0; + + if (argc != 3) { + printf("Usage: %s [ifname] [up|down]\n", argv[0]); + exit(EXIT_FAILURE); + } + + if (strncasecmp(argv[2], "up", strlen("up")) == 0) { + change |= IFF_UP; + flags |= IFF_UP; + } else if (strncasecmp(argv[2], "down", strlen("down")) == 0) { + change |= IFF_UP; + flags &= ~IFF_UP; + } else { + fprintf(stderr, "%s is not `up' nor `down'\n", argv[2]); + exit(EXIT_FAILURE); + } + + nlh = mnl_nlmsg_put_header(buf); + nlh->nlmsg_type = RTM_NEWLINK; + nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; + nlh->nlmsg_seq = seq = time(NULL); + ifm = mnl_nlmsg_put_extra_header(nlh, sizeof(*ifm)); + ifm->ifi_family = AF_UNSPEC; + ifm->ifi_change = change; + ifm->ifi_flags = flags; + + mnl_attr_put_str(nlh, IFLA_IFNAME, argv[1]); + + nl = mnl_socket_open(NETLINK_ROUTE); + 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); + } + portid = mnl_socket_get_portid(nl); + + mnl_nlmsg_fprintf(stdout, nlh); + + if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { + perror("mnl_socket_send"); + exit(EXIT_FAILURE); + } + + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + if (ret == -1) { + perror("read"); + exit(EXIT_FAILURE); + } + + ret = mnl_cb_run(buf, ret, seq, portid, NULL, NULL); + if (ret == -1){ + perror("callback"); + exit(EXIT_FAILURE); + } + + mnl_socket_close(nl); + + return 0; +} |