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/**
* Localchat
* Ben Burwell
*
* Chat request accepting functionality
*/
void *receive_chat_messages(void *arg) {
char in_buf[GLOBAL_MSG_LENGTH];
int retcode;
int i;
char separators[4] = ":";
char * tok;
retcode = recv(client_s, in_buf, sizeof(in_buf), 0);
while (strcmp(in_buf, "SESQ") != 0) {
if (retcode > 0) {
char *message;
message = strtok(in_buf, separators);
if (strcmp(message, "SESMSG") == 0) {
printf("\n----> %s", strtok(NULL, separators));
printf("%s ", prompt);
fflush(stdout);
}
}
strcpy(in_buf, "");
retcode = recv(client_s, in_buf, sizeof(in_buf), 0);
}
printf("\n*** Peer closed the session. *** \n");
// close the socket
close(client_s);
// update chat flag and broadcast
strcpy(in_chat, "N");
status_broadcast_once();
// reset the prompt
strcpy(prompt, ">");
printf("%s ", prompt);
fflush(stdout);
return;
}
void *chat_acceptor(void *arg) {
accepted_client = (int) arg;
int retcode;
char buf_i[GLOBAL_MSG_LENGTH];
char buf_o[GLOBAL_MSG_LENGTH];
retcode = recv(accepted_client, buf_i, sizeof(buf_i), 0);
if (strcmp(in_chat, "Y") == 0) {
// if already in a chat, reply no and close
strcpy(buf_o, "SESANS:N");
send(accepted_client, buf_o, strlen(buf_o)+1, 0);
close(accepted_client);
} else {
// not in a chat, ask the user
printf("\n*** CHAT REQUEST *** \n");
printf("Accept [y/n]? ");
fflush(stdout);
// update the request time
time(&chat_requested_time);
respond_to_chat_request = 1;
}
return;
}
void accept_callback_accept() {
client_s = accepted_client;
strcpy(out_buf, "SESANS:Y");
send(client_s, out_buf, strlen(out_buf)+1, 0);
char inp[256];
// update the prompt
strcpy(prompt, "chat>");
// update chat flag and broadcast
strcpy(in_chat, "Y");
status_broadcast_once();
// print info message
printf("Entering chat mode. Type /q to exit. \n");
pthread_t recv_thread;
pthread_create(&recv_thread, NULL, receive_chat_messages, NULL);
return;
}
void accept_callback_decline() {
char buf[GLOBAL_MSG_LENGTH];
strcpy(buf, "SESANS:N");
send(accepted_client, buf, strlen(buf)+1, 0);
close(accepted_client);
return;
}
void *server_loop(void *arg) {
int server_s;
struct sockaddr_in server_addr;
struct sockaddr_in client_addr;
struct in_addr client_ip_addr;
socklen_t addr_len;
pthread_t thread_id;
int retcode;
server_s = socket(AF_INET, SOCK_STREAM, 0);
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(CHAT_PORT);
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
retcode = bind(server_s, (struct sockaddr *)&server_addr, sizeof(server_addr));
if (retcode < 0) {
printf("Network error, quitting... \n");
exit(-1);
}
listen(server_s, 100);
while (1) {
addr_len = sizeof(accepted_addr);
accepted_client = accept(server_s, (struct sockaddr *)&accepted_addr, &addr_len);
if (accepted_client == -1) {
printf("Network error, quitting... \n");
exit(-1);
}
pthread_create(&thread_id, NULL, chat_acceptor, (void *)accepted_client);
}
return;
}
void start_accepting_chat_requests() {
pthread_t thread;
pthread_create(&thread, NULL, server_loop, NULL);
}
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