initial commit

third_party/libhv/echo-servers/libevent_echo.c

@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "event2/event.h"
+#include "event2/listener.h"
+#include "event2/bufferevent.h"
+#include "event2/buffer.h"
+
+//#define RECV_BUFSIZE    8192
+
+void error_cb(struct bufferevent* bev, short event, void* userdata) {
+    bufferevent_free(bev);
+}
+
+void read_cb(struct bufferevent* bev, void* userdata) {
+    //static char recvbuf[RECV_BUFSIZE];
+    //int nread = bufferevent_read(bev, &recvbuf, RECV_BUFSIZE);
+    //bufferevent_write(bev, recvbuf, nread);
+    struct evbuffer* buf = evbuffer_new();
+    int ret = bufferevent_read_buffer(bev, buf);
+    if (ret == 0) {
+        bufferevent_write_buffer(bev, buf);
+    }
+    evbuffer_free(buf);
+}
+
+void on_accept(struct evconnlistener* listener, evutil_socket_t connfd, struct sockaddr* peeraddr, int addrlen, void* userdata) {
+    struct event_base* loop = evconnlistener_get_base(listener);
+    struct bufferevent* bev = bufferevent_socket_new(loop, connfd, BEV_OPT_CLOSE_ON_FREE);
+    bufferevent_setcb(bev, read_cb, NULL, error_cb, NULL);
+    bufferevent_enable(bev, EV_READ|EV_WRITE|EV_PERSIST);
+}
+
+int main(int argc, char** argv) {
+    if (argc < 2) {
+        printf("Usage: cmd port\n");
+        return -10;
+    }
+    int port = atoi(argv[1]);
+
+    struct event_base* loop = event_base_new();
+
+    struct sockaddr_in addr;
+    memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(port);
+    struct evconnlistener* listener =  evconnlistener_new_bind(
+            loop, on_accept, NULL,
+            LEV_OPT_REUSEABLE|LEV_OPT_CLOSE_ON_FREE,
+            -1, (struct sockaddr*)&addr, sizeof(addr));
+    if (listener == NULL) {
+        return -20;
+    }
+
+    event_base_dispatch(loop);
+
+    evconnlistener_free(listener);
+    event_base_free(loop);
+    return 0;
+}