| 1 | /* public domain */ |
| 2 | /* gcc -o udptest udp-test.c */ |
| 3 | |
| 4 | /* |
| 5 | will send "RETROPAD RIGHT" indefinely to player 1 |
| 6 | to send to player 2 change port to 55401 and so on |
| 7 | */ |
| 8 | |
| 9 | #include <stdio.h> |
| 10 | #include <string.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <arpa/inet.h> |
| 13 | #include <sys/socket.h> |
| 14 | |
| 15 | #define SERVER "127.0.0.1" |
| 16 | #define PORT 55400 |
| 17 | |
| 18 | void die(char *s) |
| 19 | { |
| 20 | perror(s); |
| 21 | exit(1); |
| 22 | } |
| 23 | |
| 24 | int main(void) |
| 25 | { |
| 26 | struct sockaddr_in si_other; |
| 27 | int s, i, slen=sizeof(si_other); |
| 28 | |
| 29 | if ( (s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) |
| 30 | die("socket"); |
| 31 | |
| 32 | memset((char *) &si_other, 0, sizeof(si_other)); |
| 33 | si_other.sin_family = AF_INET; |
| 34 | si_other.sin_port = htons(PORT); |
| 35 | |
| 36 | if (inet_aton(SERVER , &si_other.sin_addr) == 0) |
| 37 | { |
| 38 | fprintf(stderr, "inet_aton() failed\n"); |
| 39 | exit(1); |
| 40 | } |
| 41 | |
| 42 | for (;;) |
| 43 | { |
| 44 | char message[10]="128"; |
| 45 | /* send the message */ |
| 46 | if (sendto(s, message, strlen(message) , 0 , (struct sockaddr *) &si_other, slen)==-1) |
| 47 | die("sendto()"); |
| 48 | |
| 49 | /* sleep for 1 frame (60hz) */ |
| 50 | usleep(16*1000); |
| 51 | } |
| 52 | |
| 53 | close(s); |
| 54 | return 0; |
| 55 | } |