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struct sockaddr_in servAddr;//linux
与 SOCKADDR_IN servAddr;//windows mreq.imr_multiaddr.s_addr//linux 与 mreq.imr_multiaddr.S_un.S_addr//windows int m = setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));//linux 与 int m = setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char FAR *)&mreq, sizeof(mreq));//windows |
原文：http://www.cnblogs.com/pokerface/p/7360457.html