custom_send example

custom_mutators/examples/custom_send.c

@@ -0,0 +1,56 @@
+// cc -O3 -fPIC -shared -g -o custom_send.so -I../../include custom_send.c
+// cd ../..
+// afl-cc -o test-instr test-instr.c
+// afl-fuzz -i in -o out -- ./test-instr -f /tmp/foo
+
+#include "custom_mutator_helpers.h"
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+typedef struct my_mutator {
+
+  afl_t *afl;
+
+} my_mutator_t;
+
+my_mutator_t *afl_custom_init(afl_t *afl, unsigned int seed) {
+
+  my_mutator_t *data = calloc(1, sizeof(my_mutator_t));
+  if (!data) {
+
+    perror("afl_custom_init alloc");
+    return NULL;
+
+  }
+
+  data->afl = afl;
+
+  return data;
+
+}
+
+void afl_custom_fuzz_send(my_mutator_t *data, uint8_t *buf, size_t buf_size) {
+
+  int fd = open("/tmp/foo", O_CREAT | O_NOFOLLOW | O_TRUNC | O_RDWR, 0644);
+
+  if (fd >= 0) {
+
+    (void)write(fd, buf, buf_size);
+    close(fd);
+
+  }
+
+  return;
+
+}
+
+void afl_custom_deinit(my_mutator_t *data) {
+
+  free(data);
+
+}
+