标签:ipv6 multicast bsp color sizeof afn char code set
#include <errno.h> #include <net/if.h> #include <sys/socket.h> #include <netinet/in.h> int sockfd_to_family(int); int mcast_set_ttl(int sockfd, int val) { switch (sockfd_to_family(sockfd)) { case AF_INET: { u_char ttl; ttl = val; return(setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl))); } #ifdef IPV6 case AF_INET6: { int hop; hop = val; return(setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hop, sizeof(hop))); } #endif default: { errno = EAFNOSUPPORT; return (-1); } } }
标签:ipv6 multicast bsp color sizeof afn char code set
原文地址:https://www.cnblogs.com/soldierback/p/10804852.html