From: Harsha Sharma <harshasharmaiitr@gmail.com>
Date: Sun, 8 Apr 2018 18:18:56 +0000 (+0530)
Subject: tests: check decoding of udev_monitor_netlink_header
X-Git-Tag: v4.23~351
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=968a545ab7b3440be870ee23f69a02068cc48f0b;p=strace

tests: check decoding of udev_monitor_netlink_header

* tests/netlink_kobject_uevent.c: Include <string.h>, <arpa/inet.h>,
and "netlink_kobject_uevent.h".
(test_nlmsg_type_udev, test_nlmsg_type_kernel): New functions.
(main): Use them.
---

diff --git a/tests/netlink_kobject_uevent.c b/tests/netlink_kobject_uevent.c
index 7edacd7d..29cf85c2 100644
--- a/tests/netlink_kobject_uevent.c
+++ b/tests/netlink_kobject_uevent.c
@@ -27,9 +27,12 @@
  */
 
 #include "tests.h"
+#include <string.h>
 #include <stdio.h>
 #include <sys/socket.h>
+#include <arpa/inet.h>
 #include "netlink.h"
+#include "netlink_kobject_uevent.h"
 
 static const char *errstr;
 
@@ -41,6 +44,79 @@ sys_send(const int fd, const void *const buf, const size_t len)
 	return rc;
 }
 
+static void
+test_nlmsg_type_udev(const int fd)
+{
+	unsigned int offset = 8;
+	struct udev_monitor_netlink_header uh = {
+		.prefix = "libudev",
+		.magic = htonl(0xfeedcafe),
+		.header_size = sizeof(uh),
+		.properties_off = 40,
+		.properties_len = 299,
+		.filter_subsystem_hash = htonl(0xc370b302),
+		.filter_devtype_hash = htonl(0x10800000),
+		.filter_tag_bloom_hi = htonl(0x2000400),
+		.filter_tag_bloom_lo = htonl(0x10800000),
+	};
+	unsigned int len = sizeof(uh);
+	char buf[len + offset];
+	memcpy(buf, &uh, len);
+	memcpy(buf + len, "12345678", offset);
+
+	sys_send(fd, &uh, len);
+	printf("sendto(%d, {{prefix=\"%s\", magic=htonl(%#x)"
+	       ", header_size=%u, properties_off=%u, properties_len=%u"
+	       ", filter_subsystem_hash=htonl(%#x)"
+	       ", filter_devtype_hash=htonl(%#x)"
+	       ", filter_tag_bloom_hi=htonl(%#x)"
+	       ", filter_tag_bloom_lo=htonl(%#x)}}, %u, MSG_DONTWAIT, NULL, "
+	       "0) = %s\n"
+	       , fd, uh.prefix,
+	       ntohl(uh.magic), uh.header_size, uh.properties_off,
+	       uh.properties_len, ntohl(uh.filter_subsystem_hash),
+	       ntohl(uh.filter_devtype_hash), ntohl(uh.filter_tag_bloom_hi),
+	       ntohl(uh.filter_tag_bloom_lo), len, errstr);
+
+	sys_send(fd, &buf, len + offset);
+	printf("sendto(%d, {{prefix=\"%s\", magic=htonl(%#x)"
+	       ", header_size=%u, properties_off=%u, properties_len=%u"
+	       ", filter_subsystem_hash=htonl(%#x)"
+	       ", filter_devtype_hash=htonl(%#x)"
+	       ", filter_tag_bloom_hi=htonl(%#x)"
+	       ", filter_tag_bloom_lo=htonl(%#x)}, "
+	       , fd, uh.prefix,
+	       ntohl(uh.magic), uh.header_size, uh.properties_off,
+	       uh.properties_len, ntohl(uh.filter_subsystem_hash),
+	       ntohl(uh.filter_devtype_hash), ntohl(uh.filter_tag_bloom_hi),
+	       ntohl(uh.filter_tag_bloom_lo));
+	print_quoted_memory(buf + len, offset);
+	printf("}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+	       len + offset, errstr);
+
+}
+
+static void
+test_nlmsg_type_kernel(const int fd)
+{
+	struct udev_monitor_netlink_header uh = {
+		.prefix = "change@",
+		.magic = htonl(0xfeedcafe),
+		.header_size = sizeof(uh),
+		.properties_off = 10,
+		.properties_len = 299,
+		.filter_subsystem_hash = htonl(0xfffffff),
+		.filter_devtype_hash = htonl(0x10000000),
+		.filter_tag_bloom_hi = htonl(0x2000400),
+	};
+
+	sys_send(fd, &uh, sizeof(uh));
+	printf("sendto(%d, ", fd);
+	print_quoted_memory(&uh, DEFAULT_STRLEN);
+	printf("..., %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+	       (unsigned) sizeof(uh), errstr);
+}
+
 int
 main(void)
 {
@@ -48,6 +124,8 @@ main(void)
 
 	int fd = create_nl_socket(NETLINK_KOBJECT_UEVENT);
 
+	test_nlmsg_type_udev(fd);
+	test_nlmsg_type_kernel(fd);
 	/* test using data that looks like a zero-length C string */
 	char *const buf = tail_alloc(DEFAULT_STRLEN + 1);
 	buf[0] = '=';