?? udpserver.c
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/*************************************************************************** * udpserver.c * * Mon May 21 21:40:55 2007 * Copyright 2007 kf701 * Email <kf701.ye AT gmail.com> ****************************************************************************//* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <sys/types.h>#include <sys/select.h>#include <netinet/in.h>#include <arpa/inet.h>#include <netdb.h>#include "kf701.h"/** * @brief UDP server use select * * Open a listen socket and read data, * then deleve data to FUNC, the user defined * FUNC deal with data. * * Note: dup addr and buf before create thread in FUNC * * @param port listen port * @param psize the UDP server MAX size protocol data * @param func user defined FUNC for deal with data */void udp_server( uint16_t port, uint32_t psize, udp_data_func func){ if( psize <= 0 || func == NULL ) { sys_message("%s,%d: argu err\n", __FILE__, __LINE__); return ; } int sockfd = open_udp( port ); if( -1 == sockfd ) { sys_message("%s,%d: open sock err,%m\n", __FILE__, __LINE__); return ; } struct sockaddr_in addr; socklen_t len = sizeof( struct sockaddr_in ); fd_set readset; FD_ZERO(&readset); FD_SET( sockfd , &readset ); int max_fd = sockfd , select_ret, nread; uint8_t buf[ psize ]; while( 1 ) { select_ret = select(max_fd+1, &readset, NULL, NULL, NULL); if ( select_ret < 0 ) { sys_message("%s,%d: select err,%m\n", __FILE__, __LINE__); continue; } if ( FD_ISSET (sockfd, &readset) ) { nread = recvfrom(sockfd, (void*)buf, sizeof(buf) ,0, (struct sockaddr*)&addr, &len); if( nread <= 0 ) { sys_message("%s: recvfrom err\n", __func__); continue; } sys_log("%s,%d: read from %s\n",__FILE__,__LINE__,inet_ntoa(addr.sin_addr)); sys_log("%s,%d: read data len = %d\n", __FILE__, __LINE__, nread); /* Note: dup addr and buf before create thread in func */ func( (struct sockaddr*)&addr, buf, nread ); } }}
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