[PATCH 6/8] tests: check decoding of NETLINK_SOCK_DIAG AF_INET messages
JingPiao Chen
chenjingpiao at gmail.com
Tue Jun 13 14:13:23 UTC 2017
* tests/netlink_sock_diag.c: Include <arpa/inet.h>
and <linux/inet_diag.h>.
(test_inet_diag_req, test_inet_diag_req_v2)
(test_inet_diag_msg): New functions.
(mian): Use them.
Co-authored-by: Fabien Siron <fabien.siron at epita.fr>
---
tests/netlink_sock_diag.c | 397 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 397 insertions(+)
diff --git a/tests/netlink_sock_diag.c b/tests/netlink_sock_diag.c
index 17fd5f4..8171e2e 100644
--- a/tests/netlink_sock_diag.c
+++ b/tests/netlink_sock_diag.c
@@ -33,8 +33,10 @@
#include <stdint.h>
#include <unistd.h>
#include <sys/socket.h>
+#include <arpa/inet.h>
#include <netinet/tcp.h>
#include <linux/if_ether.h>
+#include <linux/inet_diag.h>
#include <linux/netlink.h>
#include <linux/netlink_diag.h>
#include <linux/packet_diag.h>
@@ -792,6 +794,398 @@ test_packet_diag_msg(const int fd)
sprintrc(rc));
}
+static void
+test_inet_diag_req(const int fd)
+{
+ const char address[] = "8.8.8.8";
+ struct nlmsghdr *nlh;
+ struct inet_diag_req *req;
+ uint8_t *family;
+ void *const nlh0 = tail_alloc(NLMSG_HDRLEN);
+ long rc;
+
+ /* print family only */
+ nlh = nlh0 - sizeof(*family);
+ *nlh = (struct nlmsghdr) {
+ .nlmsg_len = NLMSG_HDRLEN + sizeof(*family),
+ .nlmsg_type = TCPDIAG_GETSOCK,
+ .nlmsg_flags = NLM_F_REQUEST,
+ };
+
+ family = NLMSG_DATA(nlh);
+ *family = AF_INET;
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=TCPDIAG_GETSOCK"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, {family=AF_INET}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ sprintrc(rc));
+
+ /* print unknown family */
+ *family = 0xff;
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=TCPDIAG_GETSOCK"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, {family=0xff /* AF_??? */}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ sprintrc(rc));
+
+ /* short read of family */
+ memmove(nlh0, nlh, NLMSG_HDRLEN);
+ nlh = nlh0;
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=TCPDIAG_GETSOCK"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, %p}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ NLMSG_DATA(nlh),
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ sprintrc(rc));
+
+ /* print family and string */
+ nlh = nlh0 - (sizeof(*family) + 4);
+ *nlh = (struct nlmsghdr) {
+ .nlmsg_len = NLMSG_HDRLEN + sizeof(*family) + 4,
+ .nlmsg_type = TCPDIAG_GETSOCK,
+ .nlmsg_flags = NLM_F_REQUEST,
+ };
+
+ family = NLMSG_DATA(nlh);
+ *family = AF_INET;
+ memcpy(family + 1, "1234", 4);
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family) + 4, MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=TCPDIAG_GETSOCK"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}"
+ ", {family=AF_INET, \"1234\"}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family) + 4,
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family) + 4,
+ sprintrc(rc));
+
+ /* print inet_diag_req */
+ nlh = nlh0 - sizeof(*req);
+ *nlh = (struct nlmsghdr) {
+ .nlmsg_len = NLMSG_HDRLEN + sizeof(*req),
+ .nlmsg_type = TCPDIAG_GETSOCK,
+ .nlmsg_flags = NLM_F_REQUEST,
+ };
+
+ req = NLMSG_DATA(nlh);
+ *req = (struct inet_diag_req) {
+ .idiag_family = AF_INET,
+ .idiag_ext = 1 << (INET_DIAG_TOS - 1),
+ .idiag_states = 1 << TCP_LAST_ACK,
+ };
+
+ if (!inet_pton(AF_INET, address, req->id.idiag_src))
+ perror_msg_and_skip("sendto");
+ if (!inet_pton(AF_INET, address, req->id.idiag_dst))
+ perror_msg_and_skip("sendto");
+
+ rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=TCPDIAG_GETSOCK"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, {idiag_family=AF_INET"
+ ", idiag_src_len=0, idiag_dst_len=0"
+ ", idiag_ext=(1<<(INET_DIAG_TOS-1)), id={idiag_sport=htons(0)"
+ ", idiag_dport=htons(0), inet_pton(AF_INET, \"%s\", idiag_src)"
+ ", inet_pton(AF_INET, \"%s\", idiag_dst), idiag_if=0"
+ ", idiag_cookie=[0, 0]}, idiag_states=1<<TCP_LAST_ACK"
+ ", idiag_dbs=0}}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, nlh->nlmsg_len, address, address, nlh->nlmsg_len,
+ sprintrc(rc));
+
+ /* short read of inet_diag_req */
+ nlh = nlh0 - sizeof(*family);
+ memmove(nlh, nlh0 - sizeof(*req), NLMSG_HDRLEN + sizeof(*family));
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*req), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=TCPDIAG_GETSOCK"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, {family=AF_INET, %p}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*req),
+ NLMSG_DATA(nlh) + 1,
+ NLMSG_HDRLEN + (unsigned int) sizeof(*req),
+ sprintrc(rc));
+}
+
+static void
+test_inet_diag_req_v2(const int fd)
+{
+ const char address[] = "8.8.8.8";
+ struct nlmsghdr *nlh;
+ struct inet_diag_req_v2 *req;
+ uint8_t *family;
+ void *const nlh0 = tail_alloc(NLMSG_HDRLEN);
+ long rc;
+
+ /* print family only */
+ nlh = nlh0 - sizeof(*family);
+ *nlh = (struct nlmsghdr) {
+ .nlmsg_len = NLMSG_HDRLEN + sizeof(*family),
+ .nlmsg_type = SOCK_DIAG_BY_FAMILY,
+ .nlmsg_flags = NLM_F_REQUEST,
+ };
+
+ family = NLMSG_DATA(nlh);
+ *family = AF_INET;
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, {family=AF_INET}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ sprintrc(rc));
+
+ /* print unknown family */
+ *family = 0xff;
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, {family=0xff /* AF_??? */}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ sprintrc(rc));
+
+ /* short read of family */
+ memmove(nlh0, nlh, NLMSG_HDRLEN);
+ nlh = nlh0;
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, %p}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ NLMSG_DATA(nlh),
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ sprintrc(rc));
+
+ /* print family and string */
+ nlh = nlh0 - sizeof(*family) - 4;
+ *nlh = (struct nlmsghdr) {
+ .nlmsg_len = NLMSG_HDRLEN + sizeof(*family) + 4,
+ .nlmsg_type = SOCK_DIAG_BY_FAMILY,
+ .nlmsg_flags = NLM_F_REQUEST,
+ };
+
+ family = NLMSG_DATA(nlh);
+ *family = AF_INET;
+ memcpy(family + 1, "1234", 4);
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family) + 4, MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}"
+ ", {family=AF_INET, \"1234\"}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family) + 4,
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family) + 4,
+ sprintrc(rc));
+
+ /* print inet_diag_req_v2 */
+ nlh = nlh0 - sizeof(*req);
+ *nlh = (struct nlmsghdr) {
+ .nlmsg_len = NLMSG_HDRLEN + sizeof(*req),
+ .nlmsg_type = SOCK_DIAG_BY_FAMILY,
+ .nlmsg_flags = NLM_F_REQUEST,
+ };
+
+ req = NLMSG_DATA(nlh);
+ *req = (struct inet_diag_req_v2) {
+ .sdiag_family = AF_INET,
+ .idiag_ext = 1 << (INET_DIAG_CONG - 1),
+ .sdiag_protocol = IPPROTO_TCP,
+ .idiag_states = 1 << TCP_CLOSE,
+ };
+
+ if (!inet_pton(AF_INET, address, req->id.idiag_src))
+ perror_msg_and_skip("sendto");
+ if (!inet_pton(AF_INET, address, req->id.idiag_dst))
+ perror_msg_and_skip("sendto");
+
+ rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, {sdiag_family=AF_INET"
+ ", sdiag_protocol=IPPROTO_TCP, idiag_ext=(1<<(INET_DIAG_CONG-1))"
+ ", idiag_states=1<<TCP_CLOSE, id={idiag_sport=htons(0)"
+ ", idiag_dport=htons(0), inet_pton(AF_INET, \"%s\", idiag_src)"
+ ", inet_pton(AF_INET, \"%s\", idiag_dst), idiag_if=0"
+ ", idiag_cookie=[0, 0]}}}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, nlh->nlmsg_len, address, address,
+ nlh->nlmsg_len, sprintrc(rc));
+
+ /* short read of inet_diag_req_v2 */
+ nlh = nlh0 - sizeof(*family);
+ memmove(nlh, nlh0 - sizeof(*req), NLMSG_HDRLEN + sizeof(*family));
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*req), MSG_DONTWAIT,
+ NULL, 0);
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_REQUEST, seq=0, pid=0}, {family=AF_INET, %p}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*req),
+ NLMSG_DATA(nlh) + 1,
+ NLMSG_HDRLEN + (unsigned int) sizeof(*req),
+ sprintrc(rc));
+}
+
+static void
+test_inet_diag_msg(const int fd)
+{
+ const char address[] = "8.8.8.8";
+ struct nlmsghdr *nlh;
+ struct inet_diag_msg *msg;
+ uint8_t *family;
+ void *const nlh0 = tail_alloc(NLMSG_HDRLEN);
+ long rc;
+
+ /* print family only */
+ nlh = nlh0 - sizeof(*family);
+ *nlh = (struct nlmsghdr) {
+ .nlmsg_len = NLMSG_HDRLEN + sizeof(*family),
+ .nlmsg_type = SOCK_DIAG_BY_FAMILY,
+ .nlmsg_flags = NLM_F_DUMP,
+ };
+
+ family = NLMSG_DATA(nlh);
+ *family = AF_INET;
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_DUMP, seq=0, pid=0}, {family=AF_INET}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ sprintrc(rc));
+
+ /* print unknown family */
+ *family = 0xff;
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_DUMP, seq=0, pid=0}, {family=0xff /* AF_??? */}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ sprintrc(rc));
+
+ /* short read of family */
+ memmove(nlh0, nlh, NLMSG_HDRLEN);
+ nlh = nlh0;
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family), MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_DUMP, seq=0, pid=0}, %p}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ NLMSG_DATA(nlh),
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family),
+ sprintrc(rc));
+
+ /* print family and string */
+ nlh = nlh0 - sizeof(*family) - 4;
+ *nlh = (struct nlmsghdr) {
+ .nlmsg_len = NLMSG_HDRLEN + sizeof(*family) + 4,
+ .nlmsg_type = SOCK_DIAG_BY_FAMILY,
+ .nlmsg_flags = NLM_F_DUMP,
+ };
+
+ family = NLMSG_DATA(nlh);
+ *family = AF_INET;
+ memcpy(family + 1, "1234", 4);
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*family) + 4, MSG_DONTWAIT,
+ NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_DUMP, seq=0, pid=0}"
+ ", {family=AF_INET, \"1234\"}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*family) + 4,
+ NLMSG_HDRLEN + (unsigned int) sizeof(*family) + 4,
+ sprintrc(rc));
+
+ /* print inet_diag_msg */
+ nlh = nlh0 - sizeof(*msg);
+ *nlh = (struct nlmsghdr) {
+ .nlmsg_len = NLMSG_HDRLEN + sizeof(*msg),
+ .nlmsg_type = SOCK_DIAG_BY_FAMILY,
+ .nlmsg_flags = NLM_F_DUMP,
+ };
+
+ msg = NLMSG_DATA(nlh);
+ *msg = (struct inet_diag_msg) {
+ .idiag_family = AF_INET,
+ .idiag_state = TCP_LISTEN,
+ };
+
+ if (!inet_pton(AF_INET, address, msg->id.idiag_src))
+ perror_msg_and_skip("sendto");
+ if (!inet_pton(AF_INET, address, msg->id.idiag_dst))
+ perror_msg_and_skip("sendto");
+
+ rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0);
+
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_DUMP, seq=0, pid=0}, {idiag_family=AF_INET"
+ ", idiag_state=TCP_LISTEN, idiag_timer=0, idiag_retrans=0"
+ ", id={idiag_sport=htons(0), idiag_dport=htons(0)"
+ ", inet_pton(AF_INET, \"%s\", idiag_src)"
+ ", inet_pton(AF_INET, \"%s\", idiag_dst)"
+ ", idiag_if=0, idiag_cookie=[0, 0]}"
+ ", idiag_expires=0, idiag_rqueue=0, idiag_wqueue=0"
+ ", idiag_uid=0, idiag_inode=0}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, nlh->nlmsg_len, address, address,
+ nlh->nlmsg_len, sprintrc(rc));
+
+ /* short read of inet_diag_msg */
+ nlh = nlh0 - sizeof(*family);
+ memmove(nlh, nlh0 - sizeof(*msg), NLMSG_HDRLEN + sizeof(*family));
+
+ rc = sendto(fd, nlh, NLMSG_HDRLEN + sizeof(*msg), MSG_DONTWAIT,
+ NULL, 0);
+ printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
+ ", flags=NLM_F_DUMP, seq=0, pid=0}, {family=AF_INET, %p}}"
+ ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+ fd, NLMSG_HDRLEN + (unsigned int) sizeof(*msg),
+ NLMSG_DATA(nlh) + 1,
+ NLMSG_HDRLEN + (unsigned int) sizeof(*msg),
+ sprintrc(rc));
+}
+
int main(void)
{
skip_if_unavailable("/proc/self/fd/");
@@ -806,6 +1200,9 @@ int main(void)
test_netlink_diag_msg(fd);
test_packet_diag_req(fd);
test_packet_diag_msg(fd);
+ test_inet_diag_req(fd);
+ test_inet_diag_req_v2(fd);
+ test_inet_diag_msg(fd);
printf("+++ exited with 0 +++\n");
--
2.7.4
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