static int accept_cb(tcp_server_stream_t *listen_stream)
{
struct sockaddr_in remote_addr;
struct epoll_event event;
socklen_t addr_len;
int sock_fd;
tcp_server_t *server;
tcp_server_stream_t *stream;
bzero(&remote_addr, sizeof(remote_addr));
addr_len = sizeof(struct sockaddr_in);
sock_fd = accept(listen_stream->sock_fd, (struct sockaddr *)&remote_addr, &addr_len);
if (sock_fd < 0) {
if (EAGAIN != errno) {
log_error("accept error, %s.", strerror(errno));
return 0;
}
else {
log_info("no connection for accept.");
return 1;
}
}
log_debug("new connection comes, fd: %d.", sock_fd);
if (!set_non_blocking(sock_fd)) {
log_error("set sock_fd: %d failed.", sock_fd);
close(sock_fd);
return 0;
}
stream = get_idle_tcp_stream(server);
if (NULL == stream) {
log_error("no idle stream.");
return 0;
}
tcp_stream_init(server, stream, sock_fd, &remote_addr);
add_stream_into_busy_list(server, stream);
/* 将当前sock fd添加到epoll中 */
bzero(&event, sizeof(event));
event.data.fd = sock_fd;
event.data.ptr = stream;
event.events = EPOLLIN | EPOLLET;
if (epoll_ctl(server->epoll_fd, EPOLL_CTL_ADD, sock_fd, &event) < 0) {
log_error("accept_cb, EPOLL_CTL_ADD error, %s.", strerror(errno));
tcp_stream_close(stream);
return 0;
}
server->active_stream_num++;
return 1;
}
int tcp_client_add_server(tcp_client_t *client,
char *server, int server_port,
tcp_client_rcv_cb_t rcv_cb,
tcp_client_snd_cb_t snd_cb,
tcp_client_conn_cb_t conn_cb)
{
tcp_client_stream_t *stream = NULL;
stream = get_idle_tcp_client_stream(client);
if (NULL == stream) {
log_error("get idle tpc client stream failed for %s.", server);
return 0;
}
if (!tcp_client_stream_init(client, stream, server_ip, port,
rcv_cb, snd_cb, conn_cb)) {
log_error("tcp_client_stream_init failed.");
add_stream_into_idle_list(client, stream);
return 0;
}
add_stream_into_busy_list(client, stream);
return 1;
}
tcp_server_t *tcp_server_create(int port, int max_conn)
{
tcp_server_t *server = NULL;
tcp_server_stream_t *stream = NULL;
int max_conn_count = TCP_MAX_STREAM_NUM;
int i = 0;
struct sockaddr_in server_addr;
struct epoll_event event;
server = (tcp_server_t *)malloc(sizeof(tcp_server_t));
if (NULL == server) {
goto error;
}
bzero(server, sizeof(tcp_server_t));
server->rcv_cb = rcv_cb_default;
server->snd_cb = snd_cb_default;
server->port = port;
if (max_conn > 0) {
max_conn_count = max_conn;
}
/* 创建并发连接结构 */
server->streams = (tcp_server_stream_t *)malloc(sizeof(tcp_server_stream_t) * max_conn_count);
if (NULL == server->streams) {
log_error("malloc for server->streams failed.");
goto error;
}
bzero(server->streams, sizeof(tcp_server_stream_t) * max_conn_count);
server->stream_num = max_conn_count;
/* idle stream链表初始化 */
for (i = 0; i < max_conn_count; i++) {
server->streams[i].index = i;
add_stream_into_idle_list(server, &server->streams[i]);
}
/* 创建listen socket */
server->listen_fd = socket(AF_INET, SOCK_STREAM, 0);
if (-1 == server->listen_fd) {
log_error("create socket failed, %s", strerror(errno));
goto error;
}
/* 设置为非阻塞 */
if (!set_non_blocking(server->listen_fd)){
log_error("set_non_blocking failed.");
goto error;
}
/* 设置地址重用 */
if (!set_reuse_addr(server->listen_fd)) {
log_error("set reuse addr failed.");
goto error;
}
/* 绑定端口 */
bzero(&server_addr, sizeof(struct sockaddr_in));
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
server_addr.sin_port = htons(server->port);
if (bind(server->listen_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
log_error("bind server addr failed, %s", strerror(errno));
goto error;
}
/* 设置监听 */
if (listen(server->listen_fd, TCP_MAX_LISTEN_NUM) < 0) {
log_error("listen failed, %s", strerror(errno));
goto error;
}
/* 创建epoll句柄 */
server->epoll_fd = epoll_create(TCP_MAX_CONNECT_NUM);
if (server->epoll_fd < 0) {
log_error("epoll_create failed, %s", strerror(errno));
goto error;
}
/* 获取空闲的stream */
stream = get_idle_tcp_stream(server);
if (NULL == stream) {
log_error("get_idle_tcp_stream for listen stream failed.");
goto error;
}
/* 将listen fd加入epoll */
bzero(&event, sizeof(event));
event.data.fd = server->listen_fd;
event.data.ptr = stream;
event.events = EPOLLIN | EPOLLET;
/* 创建listen stream */
tcp_stream_init(server, stream, server->listen_fd, NULL);
stream->snd_cb = NULL;
stream->rcv_cb = accept_cb;
add_stream_into_busy_list(server, stream);
return server;
error:
tcp_server_destroy(server);
return NULL;
}
