So it can read packets from file, which is handy when using for example
AFL or hongfuzz fuzzers.
Signed-off-by: Petr Štetiar <yn...@true.cz>
---
tests/CMakeLists.txt | 10 ++++++
tests/dns_handle_packet_file.c | 64 ++++++++++++++++++++++++++++++++++
2 files changed, 74 insertions(+)
create mode 100644 tests/dns_handle_packet_file.c
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 02b121c7b8ec..99c248281eb1 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,3 +1,13 @@
IF(CMAKE_C_COMPILER_ID STREQUAL "Clang")
ADD_SUBDIRECTORY(fuzz)
+
+ ADD_EXECUTABLE(dhpf-san dns_handle_packet_file.c)
+ TARGET_INCLUDE_DIRECTORIES(dhpf-san PRIVATE ${PROJECT_SOURCE_DIR})
+ TARGET_COMPILE_OPTIONS(dhpf-san PRIVATE -g -fno-omit-frame-pointer
-fsanitize=undefined,address,leak -fno-sanitize-recover=all)
+ TARGET_LINK_OPTIONS(dhpf-san PRIVATE -fsanitize=undefined,address,leak)
+ TARGET_LINK_LIBRARIES(dhpf-san umdns-lib-san)
ENDIF()
+
+ADD_EXECUTABLE(dhpf dns_handle_packet_file.c)
+TARGET_INCLUDE_DIRECTORIES(dhpf PRIVATE ${PROJECT_SOURCE_DIR})
+TARGET_LINK_LIBRARIES(dhpf umdns-lib)
diff --git a/tests/dns_handle_packet_file.c b/tests/dns_handle_packet_file.c
new file mode 100644
index 000000000000..cbcea08b9751
--- /dev/null
+++ b/tests/dns_handle_packet_file.c
@@ -0,0 +1,64 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "dns.h"
+#include "cache.c"
+#include "interface.h"
+
+int cfg_proto = 0;
+int cfg_no_subnet = 0;
+
+static void fuzz_dns_handle_packet(uint8_t *input, size_t size)
+{
+ struct sockaddr from;
+ struct interface iface;
+ struct cache_service *s, *t;
+
+ memset(&from, 0, sizeof(from));
+ memset(&iface, 0, sizeof(iface));
+
+ cache_init();
+ dns_handle_packet(&iface, &from, 1922, input, size);
+
+ avl_for_each_element_safe(&services, s, avl, t)
+ cache_service_free(s);
+}
+
+int main(int argc, char *argv[])
+{
+ size_t len = 0;
+ FILE *fd = NULL;
+ uint8_t *buf = NULL;
+
+ if (argc != 2) {
+ fprintf(stderr, "Usage: %s <packet.bin>\n", argv[0]);
+ return -1;
+ }
+
+ fd = fopen(argv[1], "r");
+ if (!fd) {
+ perror("unable to open input file\n");
+ return -1;
+ }
+
+ buf = calloc(1, MDNS_BUF_LEN+1);
+ if (!buf)
+ return -1;
+
+ len = fread(buf, 1, MDNS_BUF_LEN, fd);
+
+ fuzz_dns_handle_packet(buf, len);
+
+ fclose(fd);
+ free(buf);
+}
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