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#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <libgen.h>
#include <pthread.h>
#include <signal.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include <unistd.h>
#include "honggfuzz.h"
#include "libhfcommon/common.h"
#include "libhfcommon/files.h"
#include "libhfcommon/log.h"
#include "libhfcommon/ns.h"
#include "libhfcommon/util.h"
#include "socketfuzzer.h"
bool fuzz_waitForExternalInput(run_t* run) {
/* tell the external fuzzer to do his thing */
if (!fuzz_prepareSocketFuzzer(run)) {
LOG_F("fuzz_prepareSocketFuzzer() failed");
return false;
}
/* the external fuzzer may inform us of a crash */
int result = fuzz_waitforSocketFuzzer(run);
if (result == 2) {
return false;
}
return true;
}
bool fuzz_prepareSocketFuzzer(run_t* run) {
ssize_t ret;
// Notify fuzzer that he should send teh things
LOG_D("fuzz_prepareSocketFuzzer: SEND Fuzz");
ret = send(run->global->socketFuzzer.clientSocket, "Fuzz", 4, 0);
if (ret < 0) {
LOG_F("fuzz_prepareSocketFuzzer: received: %zu", ret);
return false;
}
return true;
}
/* Return values:
0: error
1: okay
2: target unresponsive
*/
int fuzz_waitforSocketFuzzer(run_t* run) {
ssize_t ret;
char buf[16];
// Wait until the external fuzzer did his thing
bzero(buf, 16);
ret = recv(run->global->socketFuzzer.clientSocket, buf, 4, 0);
LOG_D("fuzz_waitforSocketFuzzer: RECV: %s", buf);
// We dont care what we receive, its just to block here
if (ret < 0) {
LOG_F("fuzz_waitforSocketFuzzer: received: %zu", ret);
return 0;
}
if (memcmp(buf, "okay", 4) == 0) {
return 1;
} else if (memcmp(buf, "bad!", 4) == 0) {
return 2;
}
return 0;
}
bool fuzz_notifySocketFuzzerNewCov(honggfuzz_t* hfuzz) {
ssize_t ret;
// Tell the fuzzer that the thing he sent reached new BB's
ret = send(hfuzz->socketFuzzer.clientSocket, "New!", 4, 0);
LOG_D("fuzz_notifySocketFuzzer: SEND: New!");
if (ret < 0) {
LOG_F("fuzz_notifySocketFuzzer: sent: %zu", ret);
return false;
}
return true;
}
bool fuzz_notifySocketFuzzerCrash(run_t* run) {
ssize_t ret;
ret = send(run->global->socketFuzzer.clientSocket, "Cras", 4, 0);
LOG_D("fuzz_notifySocketFuzzer: SEND: Crash");
if (ret < 0) {
LOG_F("fuzz_notifySocketFuzzer: sent: %zu", ret);
return false;
}
return true;
}
bool setupSocketFuzzer(honggfuzz_t* run) {
int s, len;
socklen_t t;
struct sockaddr_un local, remote;
char socketPath[512];
snprintf(socketPath, sizeof(socketPath), "/tmp/honggfuzz_socket.%i", getpid());
if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
perror("socket");
return false;
}
local.sun_family = AF_UNIX;
strcpy(local.sun_path, socketPath);
unlink(local.sun_path);
len = strlen(local.sun_path) + sizeof(local.sun_family);
if (bind(s, (struct sockaddr*)&local, len) == -1) {
perror("bind");
return false;
}
if (listen(s, 5) == -1) {
perror("listen");
return false;
}
printf("Waiting for SocketFuzzer connection on socket: %s\n", socketPath);
t = sizeof(remote);
if ((run->socketFuzzer.clientSocket = accept(s, (struct sockaddr*)&remote, &t)) == -1) {
perror("accept");
return false;
}
run->socketFuzzer.serverSocket = s;
printf("A SocketFuzzer client connected. Continuing.\n");
return true;
}
void cleanupSocketFuzzer() {
char socketPath[512];
snprintf(socketPath, sizeof(socketPath), "/tmp/honggfuzz_socket.%i", getpid());
unlink(socketPath);
}
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