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#include <assert.h>
#include <stdbool.h>
#include <pthread.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "server.h"
#include "buffer.h"
#include "http.h"
static bool enqueue(struct fd_queue *queue, int fd) {
if (queue->count == MAX_FD_QUEUE) {
return false;
}
queue->queue[queue->back] = fd;
queue->count++;
queue->back = (queue->back + 1) % MAX_FD_QUEUE;
return true;
}
static int dequeue(struct fd_queue *queue) {
if (queue->count == 0) {
return -1;
}
int fd = queue->queue[queue->front];
queue->count--;
queue->front = (queue->front + 1) % MAX_FD_QUEUE;
return fd;
}
static void *handle_connection(void *data) {
assert(data);
struct thread_data *tdata = (struct thread_data*)data;
int fd = -1;
char buf[BUFSIZ + 1];
ssize_t rlen;
struct buffer *request_buf, *reply_buf;
struct reply *reply;
while(true) {
pthread_mutex_lock(&tdata->lock);
fd = dequeue(&tdata->queue);
if (fd == -1) {
pthread_cond_wait(&tdata->cond, &tdata->lock);
fd = dequeue(&tdata->queue);
}
pthread_mutex_unlock(&tdata->lock);
printf("got fd %d\n", fd);
if ((rlen = read(fd, buf, BUFSIZ)) < 0) {
perror("read failed");
close(fd);
continue;
}
buf[rlen] = '\0';
request_buf = buf_new(buf);
while (rlen >= BUFSIZ) {
if ((rlen = read(fd, buf, BUFSIZ)) < 0) {
perror("read failed");
close(fd);
continue;
}
buf[rlen] = '\0';
buf_append(request_buf, buf);
}
reply = http_handle_request(tdata->http, request_buf);
reply_buf = http_build_reply(reply);
free(reply);
write(fd, reply_buf->data, reply_buf->size);
buf_del(&reply_buf);
buf_del(&request_buf);
close(fd);
}
}
struct server *server_init(struct http *http) {
struct server *server = malloc(sizeof(struct server));
server->server_fd = socket(AF_INET, SOCK_STREAM, 0);
if (server->server_fd < 0) {
perror("socket failure");
return NULL;
}
struct sockaddr_in addr = {
.sin_family = AF_INET,
.sin_addr.s_addr = INADDR_ANY,
.sin_port = htons(45748),
};
int addrlen = sizeof(addr);
int opt = 1;
if (setsockopt(server->server_fd, SOL_SOCKET, SO_REUSEADDR,
&opt, sizeof(opt)) < 0) {
perror("setsockopt failed");
return NULL;
}
if (bind(server->server_fd, (struct sockaddr*)&addr, addrlen) < 0) {
perror("bind failed");
return NULL;
}
if (listen(server->server_fd, 16) < 0) {
perror("listen failed");
return NULL;
}
server->addr = addr;
server->addrlen = addrlen;
server->thread_pool_size = THREAD_POOL_NUM;
server->data.http = http;
server->pool = calloc(server->thread_pool_size, sizeof(pthread_t));
pthread_mutex_init(&server->data.lock, NULL);
pthread_cond_init(&server->data.cond, NULL);
server->data.queue.back = -1;
server->data.queue.front = -1;
server->data.queue.count = 0;
for (size_t i = 0; i < server->thread_pool_size; i++) {
pthread_create(&server->pool[i], NULL, handle_connection, &server->data);
}
return server;
}
void server_poll(struct server *server) {
int client_fd;
while (true) {
if ((client_fd = accept(server->server_fd, (struct sockaddr*)&server->addr,
(socklen_t*)&server->addrlen)) < 0) {
perror("accept failed");
return;
}
printf("connection accepted on fd %d\n", client_fd);
pthread_mutex_lock(&server->data.lock);
enqueue(&server->data.queue, client_fd);
pthread_cond_signal(&server->data.cond);
pthread_mutex_unlock(&server->data.lock);
}
}
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