tests: check decoding of incomplete SCM_TIMESTAMP* control messages

* tests/msg_control.c (test_scm_timestamp, test_scm_timestampns,
test_scm_timestamping): Check decoding of incomplete control messages.

diff --git a/tests/msg_control.c b/tests/msg_control.c
index 551a183881989cb69ab70227d146af0c7fdd685c..fab519a8df0ba96403dd6ebd57fd9f61fa23c9be 100644 (file)
--- a/tests/msg_control.c
+++ b/tests/msg_control.c
@@ -235,7 +235,7 @@ test_scm_rights3(struct msghdr *const mh, void *const page, const size_t nfds)
 static void
 test_scm_timestamp(struct msghdr *const mh, void *const page)
 {
-       const size_t len = CMSG_SPACE(sizeof(struct timeval));
+       size_t len = CMSG_SPACE(sizeof(struct timeval));
        struct cmsghdr *cmsg = get_cmsghdr(page, len);
 
        cmsg->cmsg_len = CMSG_LEN(sizeof(struct timeval));
@@ -257,12 +257,30 @@ test_scm_timestamp(struct msghdr *const mh, void *const page)
               (unsigned) cmsg->cmsg_len,
               (long long) tv->tv_sec, zero_extend_signed_to_ull(tv->tv_usec),
               (unsigned long) len, rc, errno2name());
+
+       len = CMSG_SPACE(sizeof(struct timeval) - sizeof(long));
+       cmsg = get_cmsghdr(page, len);
+
+       cmsg->cmsg_len = CMSG_LEN(sizeof(struct timeval) - sizeof(long));
+       cmsg->cmsg_level = SOL_SOCKET;
+       cmsg->cmsg_type = SCM_TIMESTAMP;
+
+       mh->msg_control = cmsg;
+       mh->msg_controllen = len;
+
+       rc = sendmsg(-1, mh, 0);
+       printf("sendmsg(-1, {msg_name=NULL, msg_namelen=0, msg_iov=NULL"
+              ", msg_iovlen=0, msg_control=[{cmsg_len=%u"
+              ", cmsg_level=SOL_SOCKET, cmsg_type=SCM_TIMESTAMP, cmsg_data=?}]"
+              ", msg_controllen=%lu, msg_flags=0}, 0) = %d %s (%m)\n",
+              (unsigned) cmsg->cmsg_len,
+              (unsigned long) len, rc, errno2name());
 }
 
 static void
 test_scm_timestampns(struct msghdr *const mh, void *const page)
 {
-       const size_t len = CMSG_SPACE(sizeof(struct timespec));
+       size_t len = CMSG_SPACE(sizeof(struct timespec));
        struct cmsghdr *cmsg = get_cmsghdr(page, len);
 
        cmsg->cmsg_len = CMSG_LEN(sizeof(struct timespec));
@@ -284,12 +302,31 @@ test_scm_timestampns(struct msghdr *const mh, void *const page)
               (unsigned) cmsg->cmsg_len,
               (long long) ts->tv_sec, zero_extend_signed_to_ull(ts->tv_nsec),
               (unsigned long) len, rc, errno2name());
+
+       len = CMSG_SPACE(sizeof(struct timespec) - sizeof(long));
+       cmsg = get_cmsghdr(page, len);
+
+       cmsg->cmsg_len = CMSG_LEN(sizeof(struct timespec) - sizeof(long));
+       cmsg->cmsg_level = SOL_SOCKET;
+       cmsg->cmsg_type = SCM_TIMESTAMPNS;
+
+       mh->msg_control = cmsg;
+       mh->msg_controllen = len;
+
+       rc = sendmsg(-1, mh, 0);
+       printf("sendmsg(-1, {msg_name=NULL, msg_namelen=0, msg_iov=NULL"
+              ", msg_iovlen=0, msg_control=[{cmsg_len=%u"
+              ", cmsg_level=SOL_SOCKET, cmsg_type=SCM_TIMESTAMPNS"
+              ", cmsg_data=?}]"
+              ", msg_controllen=%lu, msg_flags=0}, 0) = %d %s (%m)\n",
+              (unsigned) cmsg->cmsg_len,
+              (unsigned long) len, rc, errno2name());
 }
 
 static void
 test_scm_timestamping(struct msghdr *const mh, void *const page)
 {
-       const size_t len = CMSG_SPACE(3 * sizeof(struct timespec));
+       size_t len = CMSG_SPACE(3 * sizeof(struct timespec));
        struct cmsghdr *cmsg = get_cmsghdr(page, len);
 
        cmsg->cmsg_len = CMSG_LEN(3 * sizeof(struct timespec));
@@ -320,6 +357,25 @@ test_scm_timestamping(struct msghdr *const mh, void *const page)
               (long long) ts[2].tv_sec,
               zero_extend_signed_to_ull(ts[2].tv_nsec),
               (unsigned long) len, rc, errno2name());
+
+       len = CMSG_SPACE(3 * sizeof(struct timespec) - sizeof(long));
+       cmsg = get_cmsghdr(page, len);
+
+       cmsg->cmsg_len = CMSG_LEN(3 * sizeof(struct timespec) - sizeof(long));
+       cmsg->cmsg_level = SOL_SOCKET;
+       cmsg->cmsg_type = SCM_TIMESTAMPING;
+
+       mh->msg_control = cmsg;
+       mh->msg_controllen = len;
+
+       rc = sendmsg(-1, mh, 0);
+       printf("sendmsg(-1, {msg_name=NULL, msg_namelen=0, msg_iov=NULL"
+              ", msg_iovlen=0, msg_control=[{cmsg_len=%u"
+              ", cmsg_level=SOL_SOCKET, cmsg_type=SCM_TIMESTAMPING"
+              ", cmsg_data=?}]"
+              ", msg_controllen=%lu, msg_flags=0}, 0) = %d %s (%m)\n",
+              (unsigned) cmsg->cmsg_len,
+              (unsigned long) len, rc, errno2name());
 }
 
 static void