Server.c

// - todo: don't exit on connect errors, keep trying every 10s // Includes for socket (trying to use one source cpp for osx,win32,*ux)

1. ifdef WINDOWS
2. include <winsock.h>
3. else
4. include <sys/socket.h>
5. include <netinet/in.h>

//#include <arpa/inet.h> //#include <netdb.h> //#include <unistd.h>

1. endif

// Set up socket and listening loop

1. define LISTENPORT 2012
2. define BACKLOG 10
3. define BUFSIZE 128 // keeping buf small for handling many connections without fork
4. define MSG "stink ow!"

int processMessage(char* msg); int sock, conn; struct sockaddr_in my_addr, client_addr; int sockopt_on = 1; int sa_in_size = sizeof(struct sockaddr_in); char response[80];

// get a socket if ((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) { perror("socket"); exit(1); }

// make it reusable if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &sockopt_on, sizeof(int)) < 0) { perror("setsockopt"); exit(1); }

// first zero the struct memset((char *) &my_addr, 0, sa_in_size);

// now fill in the fields we need my_addr.sin_family = PF_INET; my_addr.sin_port = htons(LISTENPORT); my_addr.sin_addr.s_addr = htonl(INADDR_ANY);

// bind our socket to the port if (bind(sock, (struct sockaddr *)&my_addr, sa_in_size) < 0) { perror("bind"); exit(1); }

// start listening for incoming connections if (listen(sock, BACKLOG) < 0) { perror("listen"); exit(1); }

// Need an input buffer for each stream char *buf = malloc(BUFSIZE); int stream, bufsize;

while(1) { // grab connections if (stream = accept(sock, (struct sockaddr *)&client_addr, &sa_in_size) < 0) { perror("accept"); exit(1); }

// log the connecter // - should get info for this stream, incl buf printf("got connection from %s\n", inet_ntoa(client_addr.sin_addr));

// send a greeting - should do this in response if (send(stream, MSG, strlen(MSG)+1, 0) == -1) { perror("send"); } else printf("Sent message MSG\n");

// get the reply // - should keep receiving until \r\n\0?, then call serverProcessMessage() if (recv(stream, buf, bufsize, 0) == -1) perror("recv"); else printf("The client says \"%s\"\n", buf);

close(stream); // should close when no more data on this stream (somehow)

}

// Parses a message content and responds to client int processMessage(char* msg) { // test if restart cmd first }