92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/**************************int DROP_MULTICAST_SERVER(const char* pAddr, const int pPort, int* pListenSock, struct sockaddr_in* pInfo){
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* UDP Server Dependency *
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***************************
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* Designed & Developed by *
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* Adrien Marquès *
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* <xdrm-brackets> *
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***************************
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* doowap31@gmail.com *
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**************************/
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#include "server.h"
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int DROP_MULTICAST_SERVER(const char* pAddr, const int pPort, int* pListenSock, struct sockaddr_in* pInfo){
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/* [0] Initialisation des variables
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=========================================================*/
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int STATUS; // status
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struct ip_mreq mcastReq;
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*pListenSock = -1;
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struct timeval timeout;
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u_int reuse = 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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/* 2. Gestion erreur */
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if( *pListenSock < 0 ) return -1;
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/* 3. Timeout */
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timeout.tv_sec = SOCK_TIMEOUT;
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timeout.tv_usec = 0;
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if( setsockopt(*pListenSock, SOL_SOCKET, SO_RCVTIMEO, (char*) &timeout, sizeof(struct timeval) ) < 0 ){
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close(*pListenSock);
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return -1;
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}
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if( setsockopt(*pListenSock, SOL_SOCKET, SO_SNDTIMEO, (char*) &timeout, sizeof(struct timeval) ) < 0 ){
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close(*pListenSock);
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return -1;
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}
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/* 4. Notification d'utilisation multiple du même port */
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if( setsockopt(*pListenSock, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(u_int)) < 0 ){
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close(*pListenSock);
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return -1;
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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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/* 2. Gestion erreur */
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if( STATUS < 0 ) return -1;
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/* 3. Demande groupe multicast */
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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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/* [n] Code succès
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=========================================================*/
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return 0;
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}
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