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#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <strings.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/epoll.h>
#include <errno.h>
#include "eventloop.h"
#include "tsocket.h"
#include "util.h"
#define READ_BUFFER_SIZE 1024
void handleReadEvent(struct event *ev)
{
char buf[READ_BUFFER_SIZE];
ssize_t n_read_bytes;
struct tsocket *sock = (struct tsocket *)ev->data;
for (;;) {
n_read_bytes = read(sock->fd, buf, sizeof(buf));
if (n_read_bytes > 0) {
printf("message from conn %d: %s\n", sock->fd, buf);
write(sock->fd, buf, sizeof(buf));
} else if (n_read_bytes == 0) {
printf("conn %d disconnected\n", sock->fd);
eventLoopDel(ev->el, ev);
break;
} else if (n_read_bytes == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK)
break;
}
}
}
void serverDeleteReadEvent(struct event *ev)
{
tsocketDelete(ev->data);
free(ev);
}
struct event *serverNewReadEvent(struct tsocket *sock)
{
struct event *ev = malloc(sizeof(*ev));
ev->data = sock;
ev->handle = handleReadEvent;
ev->fd = sock->fd;
ev->delete = serverDeleteReadEvent;
return ev;
}
void handleNewClientConnection(struct event *ev)
{
struct tsocket *conn_sock = tsocketAccept(ev->data);
if (conn_sock == NULL) {
perror("socket accept");
return;
}
if (setblocking(conn_sock->fd, false) == -1) {
perror("setblocking");
tsocketDelete(conn_sock);
return;
}
struct event *read_ev = serverNewReadEvent(conn_sock);
if (eventLoopAdd(ev->el, read_ev, EPOLLIN | EPOLLET) == -1) {
perror("eventloop add fd: conn_sock");
return;
}
printf("New client fd %d, ip: %s, port: %d\n",
conn_sock->fd, conn_sock->addr, conn_sock->port);
}
struct event *serverNewAcceptEvent(const char *addr, int port)
{
struct tsocket *sock = tsocketNew();
if (sock == NULL
|| tsocketBind(sock, addr, port) == -1
|| tsocketListen(sock) == -1)
return NULL;
struct event *ev = malloc(sizeof(*ev));
ev->handle = handleNewClientConnection;
ev->data = sock;
ev->fd = sock->fd;
return ev;
}
int main()
{
struct eventLoop *el = eventLoopNew();
if (el == NULL)
panic("eventloop creation");
struct event *acceptEvent = serverNewAcceptEvent("127.0.0.1", 8888);
if (acceptEvent == NULL)
panic("server client connection event");
if (eventLoopAdd(el, acceptEvent, EPOLLIN) == -1)
panic("eventloop add fd");
eventLoopLoop(el);
}
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