initial commit

third_party/libhv/echo-servers/libuv_echo.c

@@ -0,0 +1,75 @@
+#define _GNU_SOURCE 1
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "uv.h"
+
+typedef struct {
+    uv_write_t  req;
+    uv_buf_t    buf;
+} uv_write_req_t;
+
+void alloc_cb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
+    buf->base = (char*)malloc(suggested_size);
+    buf->len = suggested_size;
+}
+
+void close_cb(uv_handle_t* handle) {
+    free(handle);
+}
+
+void write_cb(uv_write_t* req, int status) {
+    uv_write_req_t* wr = (uv_write_req_t*)req;
+    free(wr->buf.base);
+    free(wr);
+}
+
+void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
+    if (nread <= 0) {
+        uv_close((uv_handle_t*)stream, close_cb);
+        return;
+    }
+    uv_write_req_t* wr = (uv_write_req_t*)malloc(sizeof(uv_write_req_t));
+    wr->buf.base = buf->base;
+    wr->buf.len = nread;
+    uv_write(&wr->req, stream, &wr->buf, 1, write_cb);
+}
+
+void do_accept(uv_stream_t* server, int status) {
+    uv_tcp_t* tcp_stream = (uv_tcp_t*)malloc(sizeof(uv_tcp_t));
+    uv_tcp_init(server->loop, tcp_stream);
+    uv_accept(server, (uv_stream_t*)tcp_stream);
+    uv_read_start((uv_stream_t*)tcp_stream, alloc_cb, read_cb);
+}
+
+int main(int argc, char** argv) {
+    if (argc < 2) {
+        printf("Usage: cmd port\n");
+        return -10;
+    }
+    int port = atoi(argv[1]);
+
+    uv_loop_t loop;
+    uv_loop_init(&loop);
+
+    struct sockaddr_in addr;
+    memset(&addr, 0, sizeof(addr));
+    //addr.sin_family = AF_INET;
+    //addr.sin_port = htons(port);
+    uv_ip4_addr("0.0.0.0", port, &addr);
+
+    uv_tcp_t tcp_server;
+    uv_tcp_init(&loop, &tcp_server);
+    int ret = uv_tcp_bind(&tcp_server, (struct sockaddr*)&addr, 0);
+    if (ret) {
+        return -20;
+    }
+    ret = uv_listen((uv_stream_t*)&tcp_server, SOMAXCONN, do_accept);
+    if (ret) {
+        return -30;
+    }
+
+    uv_run(&loop, UV_RUN_DEFAULT);
+    return 0;
+}