Implementation of UDP receive/Send broadcast message code based on LIBUV library

Uv_send (sender side):

1#include"uv.h"2#include"task.h"3 4#include <stdio.h>5#include <stdlib.h>6#include <string.h>7 8 Staticuv_udp_t client;9 Ten Staticuv_loop_t *Loop; One  A Static voidALLOC_CB (uv_handle_t*Handle, - size_t suggested_size, -uv_buf_t*buf) the { -     Static Charslab[65536]; -Buf->Base=Slab; -Buf->len =sizeof(slab); + } -  + Static voidCLOSE_CB (uv_handle_t*handle) A { at uv_is_closing (handle); - } -  - Static voidCL_RECV_CB (uv_udp_t*Handle, - ssize_t Nread, -     Constuv_buf_t*buf, in     Const structsockaddr*addr, - unsigned flags) to { +     if(Nread <0)  -     { the  *     } $ Panax Notoginseng     if(Nread = =0)  -     { the         return; +     } A  theprintf"I receive the message from server:%s\n", buf->Base); +      -Uv_close ((uv_handle_t*) handle, CLOSE_CB); $ } $  -  - Static voidCL_SEND_CB (uv_udp_send_t* req,intstatus) the {    -Uv_udp_recv_start (req->handle, ALLOC_CB, CL_RECV_CB);Wuyi } the  - intMainvoid)  Wu { -     structsockaddr_in addr;  About uv_udp_send_t req; $ uv_buf_t buf; -     intR; -      -loop =Uv_default_loop (); A         +R = uv_ip4_addr ("0.0.0.0",0, &addr);  theR = Uv_udp_init (Loop, &client);  -R = Uv_udp_bind (&client, (Const structsockaddr*) &addr,0);  $R = Uv_udp_set_broadcast (&client,1); theUV_IP4_ADDR ("255.255.255.255",8899, &addr);  theBUF = Uv_buf_init ("PING",4); theprintf"I am Sending message to server:%s.\n", buf.Base);  theUv_udp_send (&req, -&Client, in&buf, the         1, the(Const structsockaddr*) &addr, About CL_SEND_CB);  the  the Uv_run (loop, uv_run_default); the  +     return 0; -}

Uv_recv (receiving side):

1#include"uv.h"2#include"task.h"3 4#include <stdio.h>5#include <stdlib.h>6#include <string.h>7 8 Staticuv_loop_t *Loop;9 Staticuv_udp_t server;Ten  One Static voidALLOC_CB (uv_handle_t*Handle, A size_t suggested_size, -uv_buf_t*buf) - { the     Static Charslab[65536]; -  -Buf->Base=Slab; -Buf->len =sizeof(slab); + } -  + Static voidCLOSE_CB (uv_handle_t*handle) A { at uv_is_closing (handle); - } -  - Static voidSV_SEND_CB (uv_udp_send_t* req,intstatus) - { -Uv_close ((uv_handle_t*) req->handle, CLOSE_CB); in      Free(req); - } to  + Static voidSV_RECV_CB (uv_udp_t*Handle, - ssize_t Nread, the     Constuv_buf_t*Rcvbuf, *     Const structsockaddr*addr, $ unsigned flags)Panax Notoginseng { -uv_udp_send_t*req; the uv_buf_t sndbuf; +  A     if(Nread <0)  the     { +  -     } $  $     if(Nread = =0)  -     { -         return; the     } - Wuyiprintf"I receive the message from client:%s.\n", rcvbuf->Base); the  - Uv_udp_recv_stop (handle); Wu  -req =malloc(sizeof*req); About  $Sndbuf = Uv_buf_init ("PONG",4); -Uv_udp_send (req, handle, &AMP;SNDBUF,1, addr, SV_SEND_CB); - } -  A intMainvoid)  + { the     structsockaddr_in addr; - uv_udp_send_t req; $ uv_buf_t buf; the     intR; the      theloop =Uv_default_loop (); theR = uv_ip4_addr ("0.0.0.0",8899, &addr); -R = Uv_udp_init (Loop, &server);  inR = Uv_udp_bind (&server, (Const structsockaddr*) &addr,0);  theR = Uv_udp_recv_start (&server, ALLOC_CB, SV_RECV_CB); the  About Uv_run (loop, uv_run_default); the  the     return 0; the}

Implementation of UDP receive/Send broadcast message code based on LIBUV library