65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
#include <stdio.h>
|
|
#include <time.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <arpa/inet.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include "md5.h"
|
|
|
|
int main(int argc, char **argv) {
|
|
if (argc != 5) {
|
|
printf("wrong number of arguments, requires dynid, shared secret, server ip, server port\n");
|
|
return 1;
|
|
}
|
|
|
|
const char *dynid = argv[1];
|
|
const char *sharedSecret = argv[2];
|
|
const char *serverIp = argv[3];
|
|
int serverPort = atoi(argv[4]);
|
|
|
|
if (strlen(dynid) > 64 || strlen(sharedSecret) > 64) {
|
|
printf("dynid or shared secret too long, max 64 chars each\n");
|
|
return 2;
|
|
}
|
|
if (strlen(serverIp) < 7 || strlen(serverIp) > 15) {
|
|
printf("server ip too short or too long\n");
|
|
return 3;
|
|
}
|
|
|
|
|
|
int t = (int) time(NULL);
|
|
|
|
char buf[256];
|
|
sprintf(buf, "%s %s %d", dynid, sharedSecret, t);
|
|
|
|
md5_state_t state;
|
|
|
|
md5_init(&state);
|
|
md5_append(&state, (const unsigned char *) buf, strlen(buf));
|
|
|
|
char c[16];
|
|
md5_finish(&state, (unsigned char *) c);
|
|
|
|
sprintf(buf, "%s %d %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
|
|
dynid, t,
|
|
(c[0] & 0xff), (c[1] & 0xff), (c[2] & 0xff), (c[3] & 0xff),
|
|
(c[4] & 0xff), (c[5] & 0xff), (c[6] & 0xff), (c[7] & 0xff),
|
|
(c[8] & 0xff), (c[9] & 0xff), (c[10] & 0xff), (c[11] & 0xff),
|
|
(c[12] & 0xff), (c[13] & 0xff), (c[14] & 0xff), (c[15] & 0xff));
|
|
|
|
struct sockaddr_in servaddr;
|
|
memset(&servaddr, 0, sizeof(servaddr));
|
|
servaddr.sin_family = AF_INET;
|
|
servaddr.sin_port = htons(serverPort);
|
|
inet_pton(AF_INET, serverIp, &servaddr.sin_addr);
|
|
|
|
int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
|
|
sendto(sockfd, buf, strlen(buf), 0, (struct sockaddr *) &servaddr, sizeof(servaddr));
|
|
close(sockfd);
|
|
|
|
return 0;
|
|
}
|