int main(int argc, char** argv)
{
WSADATA data;
int result = WSAStartup(MAKEWORD(2, 2), &data);
if (result != 0) {
fprintf(stderr, "Error in WSAStartup\n");
return EXIT_FAILURE;
}
SOCKET listensocket = socket(AF_INET,SOCK_STREAM, 0);
if (listensocket == INVALID_SOCKET) {
fprintf(stderr, "Create socket failed: %ld\n", WSAGetLastError());
WSACleanup();
return EXIT_FAILURE;
}
struct sockaddr_in local;
local.sin_family = AF_INET;
local.sin_addr.s_addr = INADDR_ANY;
local.sin_port = htons(PORT);
result = bind(listensocket, (struct sockaddr*)&local, sizeof(local));
if (result == SOCKET_ERROR) {
fprintf(stderr, "Bind failed: %ld\n", WSAGetLastError());
WSACleanup();
return EXIT_FAILURE;
}
result = listen(listensocket, 1);
if (result == SOCKET_ERROR) {
fprintf(stderr, "Listen failed: %ld\n", WSAGetLastError());
return EXIT_FAILURE;
}
printf("Server started at localhost:%d...\n", PORT);
while (!terminate) {
struct sockaddr_in remote;
int sockaddr_len = sizeof(remote);
SOCKET clientsocket = accept(listensocket, (struct sockaddr*)&remote, &sockaddr_len);
if (clientsocket == INVALID_SOCKET) {
fprintf(stderr, "Accept failed: %d\n", WSAGetLastError());
return EXIT_FAILURE;
}
printf("Connected %s:%d\n", inet_ntoa(remote.sin_addr), ntohs(remote.sin_port));
client_worker(clientsocket);
printf("Disconnected\n");
}
closesocket(listensocket);
WSACleanup();
return (EXIT_SUCCESS);
}
int main(int argc, char** argv)
{
int result;
int on;
struct sockaddr_in local;
int listensocket = socket(AF_INET, SOCK_STREAM, 0);
on = 1;
setsockopt(listensocket, SOL_SOCKET,
SO_REUSEADDR, &on, sizeof(on));
if (listensocket < 0) {
fprintf(stderr, "Create socket failed.\n");
return -1;
}
local.sin_family = AF_INET;
local.sin_addr.s_addr = INADDR_ANY;
local.sin_port = htons(BW_PORT);
result = bind(listensocket, (struct sockaddr*)&local,
sizeof(local));
if (result < 0) {
fprintf(stderr, "Bind failed.\n");
return -1;
}
result = listen(listensocket, 1);
if (result < 0) {
fprintf(stderr, "Listen failed.\n");
return -1;
}
while(1) {
struct sockaddr_in remote;
unsigned int sockaddr_len = sizeof(remote);
int clientsocket = accept(listensocket,
(struct sockaddr*)&remote,
&sockaddr_len);
if (clientsocket < 0) {
fprintf(stderr, "Accept failed.\n");
return -1;
}
client_worker(clientsocket);
close(clientsocket);
}
close(listensocket);
return 0;
}
int main(int argc, char** argv)
{
int sockfd, new_fd; // listen on sock_fd, new connection on new_fd
struct addrinfo hints, *servinfo, *p;
struct sockaddr_storage their_addr; // connector's address information
socklen_t sin_size;
struct sigaction sa;
int yes=1;
char s[INET6_ADDRSTRLEN];
int rv;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE; // use my IP
if ((rv = getaddrinfo(NULL, PORT, &hints, &servinfo)) != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return EXIT_FAILURE;
}
// loop through all the results and bind to the first we can
for(p = servinfo; p != NULL; p = p->ai_next) {
if ((sockfd = socket(p->ai_family, p->ai_socktype,p->ai_protocol)) <0){
perror("server: socket");
continue;
}
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes,sizeof(int)) <0){
perror("setsockopt");
return EXIT_FAILURE;
}
if (bind(sockfd, p->ai_addr, p->ai_addrlen) <0){
close(sockfd);
perror("server: bind");
continue;
}
break;
}
if (p == NULL) {
fprintf(stderr, "server: failed to bind\n");
return EXIT_FAILURE;
}
freeaddrinfo(servinfo); // all done with this structure
if (listen(sockfd, BACKLOG) <0) {
perror("listen");
return EXIT_FAILURE;
}
sa.sa_handler = sigchld_handler; // reap all dead processes
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
if (sigaction(SIGCHLD, &sa, NULL) <0) {
perror("sigaction");
return EXIT_FAILURE;
}
printf("server: waiting for connections at port %s...\n", PORT);
while(1) { // main accept() loop
sin_size = sizeof their_addr;
new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);
if (new_fd < 0) {
perror("accept");
continue;
}
inet_ntop(their_addr.ss_family,
get_in_addr((struct sockaddr *)&their_addr),
s, sizeof s);
printf("server: got connection from %s\n", s);
if (!fork()) { // this is the child process
close(sockfd); // child doesn't need the listener
client_worker(new_fd);
close(new_fd);
return 0;
}
close(new_fd); // parent doesn't need this
}
return (EXIT_SUCCESS);
}
