72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
/* derived from http://www.cs.put.poznan.pl/csobaniec/examples/sockets/server-tcp-simple.c */
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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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 <unistd.h>
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#include <errno.h>
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#undef errno
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extern int errno;
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static char msg[] =" Hello from server!\n";
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int main(int argc, char* argv[])
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{
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int sockd, sockd2;
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unsigned int addrlen;
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struct sockaddr_in my_name, peer_name;
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int status;
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/* create a socket */
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sockd = socket(AF_INET, SOCK_STREAM, 0);
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if (sockd == -1)
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{
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perror("Socket creation error");
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exit(1);
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}
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if (argc < 2)
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{
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fprintf(stderr, "Usage: %s port_number\n", argv[0]);
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exit(1);
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}
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/* server address */
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my_name.sin_family = AF_INET;
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my_name.sin_addr.s_addr = INADDR_ANY;
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my_name.sin_port = htons(atoi(argv[1]));
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status = bind(sockd, (struct sockaddr*)&my_name, sizeof(my_name));
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if (status == -1)
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{
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perror("Binding error");
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exit(1);
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}
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status = listen(sockd, 5);
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if (status == -1)
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{
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perror("Listening error");
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exit(1);
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}
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while(1)
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{
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/* wait for a connection */
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addrlen = sizeof(peer_name);
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sockd2 = accept(sockd, (struct sockaddr*)&peer_name, &addrlen);
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if (sockd2 == -1)
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{
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perror("Wrong connection");
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exit(1);
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}
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write(sockd2, msg, strlen(msg)+1);
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close(sockd2);
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}
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return 0;
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}
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