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>

1 files changed, 108 insertions, 0 deletions

diff --git a/examples/rtnl/rtnl-link-dump3.c b/examples/rtnl/rtnl-link-dump3.c
new file mode 100644
index 0000000..6d06d7c
--- /dev/null
+++ b/examples/rtnl/rtnl-link-dump3.c
@@ -0,0 +1,108 @@
+/*
+ * (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 <time.h>
+
+#include <libmnl/libmnl.h>
+#include <linux/if.h>
+#include <linux/if_link.h>
+#include <linux/rtnetlink.h>
+
+static int data_cb(const struct nlmsghdr *nlh, void *data)
+{
+	struct ifinfomsg *ifm = mnl_nlmsg_get_payload(nlh);
+	struct nlattr *attr;
+
+	printf("index=%d type=%d flags=%d family=%d ", 
+		ifm->ifi_index, ifm->ifi_type,
+		ifm->ifi_flags, ifm->ifi_family);
+
+	if (ifm->ifi_flags & IFF_RUNNING)
+		printf("[RUNNING] ");
+	else
+		printf("[NOT RUNNING] ");
+
+	mnl_attr_for_each(attr, nlh, sizeof(*ifm)) {
+		int type = mnl_attr_get_type(attr);
+
+		/* skip unsupported attribute in user-space */
+		if (mnl_attr_type_valid(attr, IFLA_MAX) < 0)
+			continue;
+
+		switch(type) {
+		case IFLA_MTU:
+			if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) {
+				perror("mnl_attr_validate");
+				return MNL_CB_ERROR;
+			}
+			printf("mtu=%d ", mnl_attr_get_u32(attr));
+			break;
+		case IFLA_IFNAME:
+			if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0) {
+				perror("mnl_attr_validate");
+				return MNL_CB_ERROR;
+			}
+			printf("name=%s ", mnl_attr_get_str(attr));
+			break;
+		}
+	}
+	printf("\n");
+
+	return MNL_CB_OK;
+}
+
+int main()
+{
+	struct mnl_socket *nl;
+	char buf[getpagesize()];
+	struct nlmsghdr *nlh;
+	struct rtgenmsg *rt;
+	int ret;
+	unsigned int seq, portid;
+
+	nlh = mnl_nlmsg_put_header(buf);
+	nlh->nlmsg_type	= RTM_GETLINK;
+	nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
+	nlh->nlmsg_seq = seq = time(NULL);
+	rt = mnl_nlmsg_put_extra_header(nlh, sizeof(struct rtgenmsg));
+	rt->rtgen_family = AF_PACKET;
+
+	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);
+
+	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));
+	while (ret > 0) {
+		ret = mnl_cb_run(buf, ret, seq, portid, data_cb, NULL);
+		if (ret <= MNL_CB_STOP)
+			break;
+		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	}
+	if (ret == -1) {
+		perror("error");
+		exit(EXIT_FAILURE);
+	}
+
+	mnl_socket_close(nl);
+
+	return 0;
+}