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aflnet-replay.c
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aflnet-replay.c
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#include <stdio.h>
#include <time.h>
#include <unistd.h>
#include "alloc-inl.h"
#include "aflnet.h"
#define server_wait_usecs 10000
unsigned int* (*extract_response_codes)(unsigned char* buf, unsigned int buf_size, unsigned int* state_count_ref) = NULL;
/* Expected arguments:
1. Path to the test case (e.g., crash-triggering input)
2. Application protocol (e.g., RTSP, FTP)
3. Server's network port
Optional:
4. First response timeout (ms), default 1
5. Follow-up responses timeout (us), default 1000
*/
int main(int argc, char* argv[])
{
FILE *fp;
int portno, n;
struct sockaddr_in serv_addr;
char* buf = NULL, *response_buf = NULL;
int response_buf_size = 0;
unsigned int size, i, state_count, packet_count = 0;
unsigned int *state_sequence;
unsigned int socket_timeout = 1000;
unsigned int poll_timeout = 1;
if (argc < 4) {
PFATAL("Usage: ./aflnet-replay packet_file protocol port [first_resp_timeout(us) [follow-up_resp_timeout(ms)]]");
}
fp = fopen(argv[1],"rb");
if (!strcmp(argv[2], "RTSP")) extract_response_codes = &extract_response_codes_rtsp;
else if (!strcmp(argv[2], "FTP")) extract_response_codes = &extract_response_codes_ftp;
else if (!strcmp(argv[2], "DNS")) extract_response_codes = &extract_response_codes_dns;
else if (!strcmp(argv[2], "DTLS12")) extract_response_codes = &extract_response_codes_dtls12;
else if (!strcmp(argv[2], "DICOM")) extract_response_codes = &extract_response_codes_dicom;
else if (!strcmp(argv[2], "SMTP")) extract_response_codes = &extract_response_codes_smtp;
else if (!strcmp(argv[2], "SSH")) extract_response_codes = &extract_response_codes_ssh;
else if (!strcmp(argv[2], "TLS")) extract_response_codes = &extract_response_codes_tls;
else if (!strcmp(argv[2], "SIP")) extract_response_codes = &extract_response_codes_sip;
else if (!strcmp(argv[2], "HTTP")) extract_response_codes = &extract_response_codes_http;
else if (!strcmp(argv[2], "IPP")) extract_response_codes = &extract_response_codes_ipp;
else if (!strcmp(argv[2], "SNMP")) extract_response_codes = &extract_response_codes_SNMP;
else if (!strcmp(argv[2], "TFTP")) extract_response_codes = &extract_response_codes_tftp;
else if (!strcmp(argv[2], "NTP")) extract_response_codes = &extract_response_codes_NTP;
else if (!strcmp(argv[2], "DHCP")) extract_response_codes = &extract_response_codes_dhcp;
else if (!strcmp(argv[2], "SNTP")) extract_response_codes = &extract_response_codes_SNTP;
else {fprintf(stderr, "[AFLNet-replay] Protocol %s has not been supported yet!\n", argv[2]); exit(1);}
portno = atoi(argv[3]);
if (argc > 4) {
poll_timeout = atoi(argv[4]);
if (argc > 5) {
socket_timeout = atoi(argv[5]);
}
}
//Wait for the server to initialize
usleep(server_wait_usecs);
if (response_buf) {
ck_free(response_buf);
response_buf = NULL;
response_buf_size = 0;
}
int sockfd;
if ((!strcmp(argv[2], "DTLS12")) || (!strcmp(argv[2], "DNS")) || (!strcmp(argv[2], "SIP"))) {
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
} else {
sockfd = socket(AF_INET, SOCK_STREAM, 0);
}
if (sockfd < 0) {
PFATAL("Cannot create a socket");
}
//Set timeout for socket data sending/receiving -- otherwise it causes a big delay
//if the server is still alive after processing all the requests
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = socket_timeout;
setsockopt(sockfd, SOL_SOCKET, SO_SNDTIMEO, (char *)&timeout, sizeof(timeout));
memset(&serv_addr, '0', sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(portno);
serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
if(connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
//If it cannot connect to the server under test
//try it again as the server initial startup time is varied
for (n=0; n < 1000; n ) {
if (connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) == 0) break;
usleep(1000);
}
if (n== 1000) {
close(sockfd);
return 1;
}
}
//Send requests one by one
//And save all the server responses
while(!feof(fp)) {
if (buf) {ck_free(buf); buf = NULL;}
if (fread(&size, sizeof(unsigned int), 1, fp) > 0) {
packet_count ;
fprintf(stderr,"\nSize of the current packet %d is %d\n", packet_count, size);
buf = (char *)ck_alloc(size);
fread(buf, size, 1, fp);
if (net_recv(sockfd, timeout, poll_timeout, &response_buf, &response_buf_size)) break;
n = net_send(sockfd, timeout, buf,size);
if (n != size) break;
if (net_recv(sockfd, timeout, poll_timeout, &response_buf, &response_buf_size)) break;
}
}
fclose(fp);
close(sockfd);
//Extract response codes
state_sequence = (*extract_response_codes)(response_buf, response_buf_size, &state_count);
fprintf(stderr,"\n--------------------------------");
fprintf(stderr,"\nResponses from server:");
for (i = 0; i < state_count; i ) {
fprintf(stderr,"%d-",state_sequence[i]);
}
fprintf(stderr,"\n \nResponses in details:\n");
for (i=0; i < response_buf_size; i ) {
fprintf(stderr,"%c",response_buf[i]);
}
fprintf(stderr,"\n--------------------------------");
//Free memory
ck_free(state_sequence);
if (buf) ck_free(buf);
ck_free(response_buf);
return 0;
}