int main(int argc, char** argv) {
// Check if the port number was provided
if(argc != 2) {
printf("Proper usage: chatserver [port number]");
exit(1);
}
else {
portNo = atoi(argv[1]);
}
// Set up the TCP socket
serverSock = setSocket(&portNo);
// Bind the socket
bindSocket();
while(1) {
// Establish a socket that listens for incoming reqests
listenForReq();
// Accept a client request
isConnected = connectClient();
// allocate memory to send and receive messages
sendBuff = (char*) malloc(512);
recBuff = (char*) malloc(512);
quit = (char*) malloc(10);
strcpy(quit, "\\quit\n");
getClientHandle();
while(1) {
if(receiveMessage() == 0) {
break;
}
if(sendMessage() == 0) {
break;
}
}
}
close(serverSock);
return 0;
}
main(int ac, char **av)
{
int i;
int on = 1;
short port = -1; /* host order. */
int setFD = 0;
struct sockaddr_in saddr;
int acceptFD;
clientHandle_t *clientHandle;
int code;
int addr_len;
PROCESS pid;
fd_set *rfds, *wfds, *efds;
int sockFD;
program = av[0];
if (ac < 2)
Usage();
/* lwp_debug = 1; */
signal(SIGIO, sigIO);
for (i = 1; i < ac; i++) {
if (!strcmp("-fd", av[i])) {
if (++i >= ac) {
printf("Missing number for -fd option.\n");
Usage();
}
setFD = atoi(av[i]);
if (setFD <= 2) {
printf("%d: file descriptor must be at least 3.\n", setFD);
Usage();
}
} else {
if (port == -1) {
port = atoi(av[i]);
if (port <= 0) {
printf("%s: port must be at least 1\n", av[i]);
Usage();
}
} else {
printf("%s: Unknown argument.\n", av[i]);
}
}
}
if (port == -1) {
printf("Missing port.\n");
Usage();
}
if (!setFD) {
setFD = 31;
printf("Using default socket of %d.\n", setFD);
}
OpenFDs(setFD);
IOMGR_Initialize();
/* Setup server processes */
for (i = 0; i < MAX_THREADS; i++) {
if (LWP_CreateProcess
(handleRequest, 32768, LWP_NORMAL_PRIORITY,
(char *)&clientHandles[i], "HandleRequestThread", &pid) < 0) {
printf("%s: Failed to start all LWP's\n", program);
exit(1);
}
clientHandles[i].ch_pid = pid;
}
sockFD = socket(AF_INET, SOCK_STREAM, 0);
if (sockFD < 0) {
perror("socket");
exit(1);
}
Log("Using socket at file descriptor %d.\n", sockFD);
if (setsockopt(sockFD, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on))
< 0) {
perror("setsockopt: ");
exit(1);
}
memset((void *)&saddr, 0, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_port = ntohs(port);
saddr.sin_addr.s_addr = htonl(INADDR_ANY);
if (bind(sockFD, (struct sockaddr *)&saddr, sizeof(saddr)) < 0) {
perror("bind: ");
exit(1);
}
rfds = IOMGR_AllocFDSet();
wfds = IOMGR_AllocFDSet();
efds = IOMGR_AllocFDSet();
if (!rfds || !wfds || !efds) {
printf("main: Could not alloc fd_set's.\n");
exit(1);
}
listen(sockFD, 100);
while (1) {
FD_ZERO(rfds);
FD_ZERO(wfds);
FD_ZERO(efds);
FD_SET(sockFD, rfds);
FD_SET(sockFD, efds);
Log("Main - going to select.\n");
code =
IOMGR_Select(sockFD + 1, rfds, wfds, efds, (struct timeval *)0);
switch (code) {
case 0: /* Timer, can't happen here. */
case -1:
case -2:
Log("Oops! select returns %d!\n", code);
abort();
default:
if (FD_ISSET(sockFD, efds)) {
recvOOB(sockFD);
assertNullFDSet(sockFD, rfds);
assertNullFDSet(-1, wfds);
assertNullFDSet(sockFD, efds);
}
if (FD_ISSET(sockFD, rfds)) {
while (nThreads > MAX_THREADS) {
IOMGR_Sleep(1);
}
clientHandle = getClientHandle();
addr_len = sizeof(clientHandle->ch_addr);
clientHandle->ch_fd = accept(sockFD, (struct sockaddr *)
&clientHandle->ch_addr,
&addr_len);
if (clientHandle->ch_fd < 0) {
perror("accept: ");
exit(1);
}
Log("Main - signalling LWP 0x%x\n", &clientHandle->ch_state);
LWP_NoYieldSignal(&clientHandle->ch_state);
assertNullFDSet(sockFD, rfds);
assertNullFDSet(-1, wfds);
assertNullFDSet(-1, efds);
break;
}
Die(1, "(main) No data to read.\n");
}
}
}
