101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
#include "client.h"
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int main(int argc, char* argv[]){
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/* [1] Initialization + arguments
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=========================================================*/
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/* (1) Socket information */
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struct sockaddr_in server_addr; // server info
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int sock, // socket
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port; // chosen port
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char hostname[24]; // chosen hostname
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/* (2) Misc. information */
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int bytes; // transfer count
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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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/* [2] Manage arguments
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=========================================================*/
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/* (1) Manage arguments count */
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if( argc < 3 ){
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printf("Missing arguments\nUsage: client hostname port [message]\n");
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return 1;
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}
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/* (2) Manage @hostname argument */
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if( strlen(argv[1]) > 24 || sscanf(argv[1], "%s", hostname) <= 0 ){
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printf("argument error: hostname must be a string (max: 24 characters long)\n");
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return 1;
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}
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/* (3) Manage port argument */
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if( sscanf(argv[2], "%d", &port) <= 0 ){
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printf("argument error: port must be a valid integer\n");
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return 1;
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}
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/* (4) Manage optional @message argument */
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if( argc >= 4 ){
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if( strlen(argv[3]) > BUFSIZE || sscanf(argv[3], "%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, "client default message");
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/* [3] Create UPD socket and get target data
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=========================================================*/
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sock = xconnect(hostname, port, &server_addr);
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/* (1-) Manage error */
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if( sock == -1 ){
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perror("erreur connection server");
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exit(1);
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}
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/* [4] Send message
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=========================================================*/
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/* (1) Send message to server */
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bytes = xwrite(sock, to_send);
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/* (2) Check if send succesfully */
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if( bytes == -1 ){
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perror("erreur envoi message");
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exit(1);
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}
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DEBUG&& printf("*** sent %d bytes\n", bytes);
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/* [5] Wait for response
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=========================================================*/
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/* (1) Wait for response */
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bytes = xread(sock, to_recv, BUFSIZE);
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/* (2) Check if received successfully (and consistently) */
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if( bytes == -1 ){
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perror("erreur réponse serveur");
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exit(1);
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}
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/* (4) log */
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printf("*** received : '%s'\n", to_recv);
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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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