101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
#include "server.h"
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int main(int argc, char* argv[]){
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/* [1] Initialisation
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=========================================================*/
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/* (1) Socket info */
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// Client
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struct sockaddr_in addr_client;
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char client_ip[20];
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int port; // chosen port
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// Socket
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int sock;
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/* (2) Misc. information */
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char* to_send = (char*) malloc( BUFSIZE * sizeof(char) );
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char* to_recv = (char*) malloc( BUFSIZE * sizeof(char) );
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int bytes; // transfer count
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/* [2] Manage arguments
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=========================================================*/
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/* (1) Manage arguments count */
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if( argc < 2 ){
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printf("Missing arguments\nUsage: server port [message]\n");
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printf("port = 0 : automatic port\n");
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return 1;
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}
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/* (2) Manage port argument */
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if( sscanf(argv[1], "%d", &port) <= 0 ){
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printf("argument error: port must be a valid integer\n");
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printf("port = 0 : automatic port\n");
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return 1;
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}
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/* (3) Manage optional @message argument */
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if( argc >= 3 ){
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if( strlen(argv[2]) > BUFSIZE || sscanf(argv[2], "%s", to_send) <= 0 ){
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printf("argument error: message must be a string (max: %d characters long)\n", BUFSIZE);
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return 1;
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}
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}else
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strcpy(to_send, "server default message");
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/* [3] Create socket
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=========================================================*/
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/* (1) Create socket */
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sock = xbind(port);
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/* (1-) Manage error */
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if( sock == -1 ){
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perror("erreur création socket");
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exit(1);
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}
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/* [4] Wait for client message
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=========================================================*/
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/* (1) Listen to data */
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bytes = xlisten(sock, &addr_client, to_recv, BUFSIZE);
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/* (2) Manage error */
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if( bytes == -1 ){
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perror("erreur réception paquet");
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exit(1);
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}
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// Get client ip
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inet_ntop(AF_INET, &(addr_client.sin_addr), client_ip, 20);
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printf("*** received '%s' (%d bytes) from %s:%d\n", to_recv, bytes, client_ip, ntohs(addr_client.sin_port));
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/* [5] Send response
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=========================================================*/
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/* (1) Send response */
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bytes = xsend(sock, to_send, &addr_client);
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/* (2) Manage error */
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if( bytes == -1 ){
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perror("erreur envoi réponse");
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exit(1);
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}
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/* [6] Close socket
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=========================================================*/
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close(sock);
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return 0;
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}
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