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 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 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 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 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 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 70 void remove_sock(int sig) { 71 uv_fs_t req; 72 uv_fs_unlink(loop, &req, PIPENAME, NULL); 73 exit(0); 74 } 75 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