Created
May 30, 2016 18:45
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| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <errno.h> | |
| #include <sys/types.h> | |
| #include <sys/socket.h> | |
| #include <netinet/in.h> | |
| #include <net/if.h> | |
| void main(int argc,char** argv) | |
| { | |
| struct ifreq ifr; | |
| int rc; | |
| if( argc != 4 ) | |
| { | |
| printf( "Usage: %s iface ip port\n" , argv[0] ); | |
| exit( EXIT_FAILURE ); | |
| } | |
| int sd = socket(AF_INET, SOCK_DGRAM, 0); | |
| if( sd < 0 ) | |
| { | |
| perror( "Error in socket creation" ); | |
| exit( EXIT_FAILURE ); | |
| } | |
| memset(&ifr, 0, sizeof(ifr)); | |
| strncpy( ifr.ifr_name, argv[1], sizeof(ifr.ifr_name) ); | |
| if ((rc = setsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, (void *)&ifr, sizeof(ifr))) < 0) | |
| { | |
| perror("Server-setsockopt() error for SO_BINDTODEVICE"); | |
| close(sd); | |
| exit(EXIT_FAILURE); | |
| } | |
| struct sockaddr_in sin; | |
| memset(&sin, 0, sizeof(sin)); | |
| sin.sin_family = AF_INET; | |
| if( inet_aton( argv[2], &sin.sin_addr ) == 0 ) | |
| { | |
| printf( "inet_aton: Invalid address: %s\n", argv[2] ); | |
| close(sd); | |
| exit(EXIT_FAILURE); | |
| } | |
| sin.sin_port = htons(atoi(argv[3])); | |
| if( sendto( sd, "aaaa", 4, 0, (struct sockaddr*) &sin, sizeof(sin) ) < 0 ) | |
| { | |
| perror( "sendto()" ); | |
| close(sd); | |
| exit(EXIT_FAILURE); | |
| } | |
| printf( "Enviado\n" ); | |
| close( sd ); | |
| exit( EXIT_SUCCESS ); | |
| } |
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