81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
#include "server.h"
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int DROP_UDP_SERVER(const char* pAddr, const int pPort, int* pListenSock, struct sockaddr_in* pInfo, const char pMcast){
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if( DEBUGMOD&HDR ) printf("====== DROP_UDP_MCAST(%s, %d, %p, %p, %d) ======\n\n", pAddr, pPort, (void*) pListenSock, (void*) pInfo, (int) pMcast);
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/* [0] Initialisation des variables
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=========================================================*/
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int STATUS; // status
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uint yes = 1;
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struct ip_mreq mcastReq;
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*pListenSock = -1;
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/* [1] Création de la socket
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=======================================================*/
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/* 1. Création socket */
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*pListenSock = socket(AF_INET, SOCK_DGRAM, 0);
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if( DEBUGMOD&SCK && DEBUGMOD&HDR ) printf(" * [drop_udp_server] socket: %d\n", *pListenSock);
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/* 2. Gestion erreur */
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if( *pListenSock < 0 ) return -1;
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/* 3. MULTICAST -> Autorisation plusieurs sockets sur port */
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if( pMcast ){
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if( DEBUGMOD&SCK && DEBUGMOD&HDR ) printf(" * [drop_udp_server] set port to be reused\n");
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if( setsockopt(*pListenSock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(uint) ) < 0 ){
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close(*pListenSock);
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return -1;
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}
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}
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/* [2] On définit les infos de la socket
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=========================================================*/
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/* (1) Reset des valeurs */
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bzero(pInfo, sizeof(struct sockaddr_in));
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/* (2) On définit les infos */
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pInfo->sin_family = AF_INET;
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pInfo->sin_port = htons(pPort);
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pInfo->sin_addr.s_addr = htonl(INADDR_ANY);
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/* [3] On publie la SOCKET
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=======================================================*/
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/* 1. Publication socket */
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STATUS = bind(*pListenSock, (struct sockaddr*) pInfo, sizeof(struct sockaddr_in));
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if( DEBUGMOD&SCK && DEBUGMOD&HDR ) printf(" * [drop_udp_server] bind: %d\n", STATUS);
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/* 2. Gestion erreur */
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if( STATUS < 0 ) return -1;
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/* 3. Demande groupe multicast (si demandé) */
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if( pMcast ){
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if( DEBUGMOD&SCK && DEBUGMOD&HDR ) printf(" * [drop_udp_server] join mcast group: %s\n", pAddr);
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mcastReq.imr_multiaddr.s_addr = inet_addr(pAddr);
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mcastReq.imr_interface.s_addr = htonl(INADDR_ANY);
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if( setsockopt(*pListenSock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mcastReq, sizeof(mcastReq)) < 0 ){
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close(*pListenSock);
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return -1;
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}
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}
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/* [n] Code succès
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=========================================================*/
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return 0;
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}
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