1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <uv.h>
5
6 #ifdef _WIN32
7 #define PIPENAME "\\\\?\\pipe\\echo.sock"
8 #else
9 #define PIPENAME "/tmp/echo.sock"
10 #endif
11
12 uv_loop_t *loop;
13
14 typedef struct {
15 uv_write_t req;
16 uv_buf_t buf;
17 } write_req_t;
18
free_write_req(uv_write_t * req)19 void free_write_req(uv_write_t *req) {
20 write_req_t *wr = (write_req_t*) req;
21 free(wr->buf.base);
22 free(wr);
23 }
24
alloc_buffer(uv_handle_t * handle,size_t suggested_size,uv_buf_t * buf)25 void alloc_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf) {
26 buf->base = malloc(suggested_size);
27 buf->len = suggested_size;
28 }
29
echo_write(uv_write_t * req,int status)30 void echo_write(uv_write_t *req, int status) {
31 if (status < 0) {
32 fprintf(stderr, "Write error %s\n", uv_err_name(status));
33 }
34 free_write_req(req);
35 }
36
echo_read(uv_stream_t * client,ssize_t nread,const uv_buf_t * buf)37 void echo_read(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf) {
38 if (nread > 0) {
39 write_req_t *req = (write_req_t*) malloc(sizeof(write_req_t));
40 req->buf = uv_buf_init(buf->base, nread);
41 uv_write((uv_write_t*) req, client, &req->buf, 1, echo_write);
42 return;
43 }
44
45 if (nread < 0) {
46 if (nread != UV_EOF)
47 fprintf(stderr, "Read error %s\n", uv_err_name(nread));
48 uv_close((uv_handle_t*) client, NULL);
49 }
50
51 free(buf->base);
52 }
53
on_new_connection(uv_stream_t * server,int status)54 void on_new_connection(uv_stream_t *server, int status) {
55 if (status == -1) {
56 // error!
57 return;
58 }
59
60 uv_pipe_t *client = (uv_pipe_t*) malloc(sizeof(uv_pipe_t));
61 uv_pipe_init(loop, client, 0);
62 if (uv_accept(server, (uv_stream_t*) client) == 0) {
63 uv_read_start((uv_stream_t*) client, alloc_buffer, echo_read);
64 }
65 else {
66 uv_close((uv_handle_t*) client, NULL);
67 }
68 }
69
remove_sock(int sig)70 void remove_sock(int sig) {
71 uv_fs_t req;
72 uv_fs_unlink(loop, &req, PIPENAME, NULL);
73 exit(0);
74 }
75
main()76 int main() {
77 loop = uv_default_loop();
78
79 uv_pipe_t server;
80 uv_pipe_init(loop, &server, 0);
81
82 signal(SIGINT, remove_sock);
83
84 int r;
85 if ((r = uv_pipe_bind(&server, PIPENAME))) {
86 fprintf(stderr, "Bind error %s\n", uv_err_name(r));
87 return 1;
88 }
89 if ((r = uv_listen((uv_stream_t*) &server, 128, on_new_connection))) {
90 fprintf(stderr, "Listen error %s\n", uv_err_name(r));
91 return 2;
92 }
93 return uv_run(loop, UV_RUN_DEFAULT);
94 }
95
