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authorPablo Neira Ayuso <pablo@netfilter.org>2010-09-08 13:04:35 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2010-09-08 13:07:32 +0200
commit089d5e1c6a4fcd6615b02866b760f2d7b4084a08 (patch)
tree607b14e964297f19a84f904fe8f896e142853e70 /examples/genl
parent2a67cbdd18d23612a49435e251fb0c853388b0e8 (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/genl')
-rw-r--r--examples/genl/Makefile.am7
-rw-r--r--examples/genl/genl-family-get.c241
2 files changed, 248 insertions, 0 deletions
diff --git a/examples/genl/Makefile.am b/examples/genl/Makefile.am
new file mode 100644
index 0000000..a2df116
--- /dev/null
+++ b/examples/genl/Makefile.am
@@ -0,0 +1,7 @@
+include $(top_srcdir)/Make_global.am
+
+check_PROGRAMS = genl-family-get
+
+genl_family_get_SOURCES = genl-family-get.c
+genl_family_get_LDADD = ../../src/libmnl.la
+genl_family_get_LDFLAGS = -dynamic -ldl
diff --git a/examples/genl/genl-family-get.c b/examples/genl/genl-family-get.c
new file mode 100644
index 0000000..326755e
--- /dev/null
+++ b/examples/genl/genl-family-get.c
@@ -0,0 +1,241 @@
+/*
+ * (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/genetlink.h>
+
+static int parse_mc_grps_cb(const struct nlattr *attr, void *data)
+{
+ const struct nlattr **tb = (const struct nlattr **)data;
+ int type = mnl_attr_get_type(attr);
+
+ /* skip unsupported attribute in user-space */
+ if (mnl_attr_type_valid(attr, CTRL_ATTR_MCAST_GRP_MAX) < 0)
+ return MNL_CB_OK;
+
+ switch(type) {
+ case CTRL_ATTR_MCAST_GRP_ID:
+ if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) {
+ perror("mnl_attr_validate");
+ return MNL_CB_ERROR;
+ }
+ break;
+ case CTRL_ATTR_MCAST_GRP_NAME:
+ if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0) {
+ perror("mnl_attr_validate");
+ return MNL_CB_ERROR;
+ }
+ break;
+ }
+ tb[type] = attr;
+ return MNL_CB_OK;
+}
+
+static void parse_genl_mc_grps(struct nlattr *nested)
+{
+ struct nlattr *pos;
+
+ mnl_attr_for_each_nested(pos, nested) {
+ struct nlattr *tb[CTRL_ATTR_MCAST_GRP_MAX+1] = {};
+
+ mnl_attr_parse_nested(pos, parse_mc_grps_cb, tb);
+ if (tb[CTRL_ATTR_MCAST_GRP_ID]) {
+ printf("id-0x%x ",
+ mnl_attr_get_u32(tb[CTRL_ATTR_MCAST_GRP_ID]));
+ }
+ if (tb[CTRL_ATTR_MCAST_GRP_NAME]) {
+ printf("name: %s ",
+ mnl_attr_get_str(tb[CTRL_ATTR_MCAST_GRP_NAME]));
+ }
+ printf("\n");
+ }
+}
+
+static int parse_family_ops_cb(const struct nlattr *attr, void *data)
+{
+ const struct nlattr **tb = (const struct nlattr **)data;
+ int type = mnl_attr_get_type(attr);
+
+ if (mnl_attr_type_valid(attr, CTRL_ATTR_OP_MAX) < 0)
+ return MNL_CB_OK;
+
+ switch(type) {
+ case CTRL_ATTR_OP_ID:
+ if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) {
+ perror("mnl_attr_validate");
+ return MNL_CB_ERROR;
+ }
+ break;
+ case CTRL_ATTR_OP_MAX:
+ break;
+ default:
+ return MNL_CB_OK;
+ }
+ tb[type] = attr;
+ return MNL_CB_OK;
+}
+
+static void parse_genl_family_ops(struct nlattr *nested)
+{
+ struct nlattr *pos;
+
+ mnl_attr_for_each_nested(pos, nested) {
+ struct nlattr *tb[CTRL_ATTR_OP_MAX+1] = {};
+
+ mnl_attr_parse_nested(pos, parse_family_ops_cb, tb);
+ if (tb[CTRL_ATTR_OP_ID]) {
+ printf("id-0x%x ",
+ mnl_attr_get_u32(tb[CTRL_ATTR_OP_ID]));
+ }
+ if (tb[CTRL_ATTR_OP_MAX]) {
+ printf("flags ");
+ }
+ printf("\n");
+ }
+}
+
+static int data_attr_cb(const struct nlattr *attr, void *data)
+{
+ const struct nlattr **tb = (const struct nlattr **)data;
+ int type = mnl_attr_get_type(attr);
+
+ if (mnl_attr_type_valid(attr, CTRL_ATTR_MAX) < 0)
+ return MNL_CB_OK;
+
+ switch(type) {
+ case CTRL_ATTR_FAMILY_NAME:
+ if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0) {
+ perror("mnl_attr_validate");
+ return MNL_CB_ERROR;
+ }
+ break;
+ case CTRL_ATTR_FAMILY_ID:
+ if (mnl_attr_validate(attr, MNL_TYPE_U16) < 0) {
+ perror("mnl_attr_validate");
+ return MNL_CB_ERROR;
+ }
+ break;
+ case CTRL_ATTR_VERSION:
+ case CTRL_ATTR_HDRSIZE:
+ case CTRL_ATTR_MAXATTR:
+ if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) {
+ perror("mnl_attr_validate");
+ return MNL_CB_ERROR;
+ }
+ break;
+ case CTRL_ATTR_OPS:
+ case CTRL_ATTR_MCAST_GROUPS:
+ if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0) {
+ perror("mnl_attr_validate");
+ return MNL_CB_ERROR;
+ }
+ break;
+ }
+ tb[type] = attr;
+ return MNL_CB_OK;
+}
+
+static int data_cb(const struct nlmsghdr *nlh, void *data)
+{
+ struct nlattr *tb[CTRL_ATTR_MAX+1] = {};
+ struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
+
+ mnl_attr_parse(nlh, sizeof(*genl), data_attr_cb, tb);
+ if (tb[CTRL_ATTR_FAMILY_NAME]) {
+ printf("name=%s\t",
+ mnl_attr_get_str(tb[CTRL_ATTR_FAMILY_NAME]));
+ }
+ if (tb[CTRL_ATTR_FAMILY_ID]) {
+ printf("id=%u\t",
+ mnl_attr_get_u16(tb[CTRL_ATTR_FAMILY_ID]));
+ }
+ if (tb[CTRL_ATTR_VERSION]) {
+ printf("version=%u\t",
+ mnl_attr_get_u32(tb[CTRL_ATTR_VERSION]));
+ }
+ if (tb[CTRL_ATTR_HDRSIZE]) {
+ printf("hdrsize=%u\t",
+ mnl_attr_get_u32(tb[CTRL_ATTR_HDRSIZE]));
+ }
+ if (tb[CTRL_ATTR_MAXATTR]) {
+ printf("maxattr=%u\t",
+ mnl_attr_get_u32(tb[CTRL_ATTR_MAXATTR]));
+ }
+ if (tb[CTRL_ATTR_OPS]) {
+ printf("\nops:\n");
+ parse_genl_family_ops(tb[CTRL_ATTR_OPS]);
+ }
+ if (tb[CTRL_ATTR_MCAST_GROUPS]) {
+ printf("\ngrps:\n");
+ parse_genl_mc_grps(tb[CTRL_ATTR_MCAST_GROUPS]);
+ }
+ return MNL_CB_OK;
+}
+
+int main(int argc, char *argv[])
+{
+ struct mnl_socket *nl;
+ char buf[getpagesize()];
+ struct nlmsghdr *nlh;
+ struct genlmsghdr *genl;
+ int ret;
+ unsigned int seq, portid;
+
+ if (argc != 2) {
+ printf("%s [family name]\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ nlh = mnl_nlmsg_put_header(buf);
+ nlh->nlmsg_type = GENL_ID_CTRL;
+ nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ nlh->nlmsg_seq = seq = time(NULL);
+
+ genl = mnl_nlmsg_put_extra_header(nlh, sizeof(struct genlmsghdr));
+ genl->cmd = CTRL_CMD_GETFAMILY;
+ genl->version = 1;
+
+ mnl_attr_put_u32(nlh, CTRL_ATTR_FAMILY_ID, GENL_ID_CTRL);
+ mnl_attr_put_str_null(nlh, CTRL_ATTR_FAMILY_NAME, 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);
+ }
+ 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 <= 0)
+ break;
+ ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+ }
+ if (ret == -1) {
+ perror("error");
+ exit(EXIT_FAILURE);
+ }
+
+ mnl_socket_close(nl);
+
+ return 0;
+}