63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#define LINESIZE 128
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void error(char *msg){
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perror(msg);
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exit(1);
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}
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int main (int argc, char *argv[]){
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int sockfd;
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int newsockfd;
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int portno;
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int clilen;
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int n;
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char buffer[LINESIZE];
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struct sockaddr_in serv_addr;
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struct sockaddr_in cli_addr;
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if (argc < 2){
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fprintf(stderr, "ERROR, no port provided\n");
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exit(1);
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}
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sockfd = socket(PF_INET, SOCK_STREAM, 0);
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if (sockfd < 0){
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error("ERROR opening socket");
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}
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bzero((char *)&serv_addr, sizeof(serv_addr));
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portno = atoi(argv[1]);
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_addr.s_addr = INADDR_ANY;
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serv_addr.sin_port = htons(portno);
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printf("Server is waiting for the message, please wait...\n");
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if (bind(sockfd, (struct sockaddr *)&serv_addr, sizeof (serv_addr)) < 0){
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error("ERROR on binding");
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}
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listen(sockfd, 5);
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clilen = sizeof(cli_addr);
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newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
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if (newsockfd < 0){
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error("ERROR on accept");
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}
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bzero(buffer, LINESIZE);
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n = read(newsockfd, buffer, LINESIZE);
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if (n < 0){
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error("ERROR reading from socket");
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}
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printf("The message is: %s", buffer);
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fprintf(stderr, "The mesaage contains %d bytes.\n", n);
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close(sockfd);
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return 0;
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}
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