85     struct cmsghdr     *cmsg;  in transmitPacket()  local
116         cmsg             = CMSG_FIRSTHDR(&msg);  in transmitPacket()
117         cmsg->cmsg_level = IPPROTO_IPV6;  in transmitPacket()
118         cmsg->cmsg_type  = IPV6_HOPLIMIT;  in transmitPacket()
119         cmsg->cmsg_len   = CMSG_LEN(sizeof(int));  in transmitPacket()
121         memcpy(CMSG_DATA(cmsg), &hopLimit, sizeof(int));  in transmitPacket()
130         cmsg             = CMSG_NXTHDR(&msg, cmsg);  in transmitPacket()
131         cmsg->cmsg_level = IPPROTO_IPV6;  in transmitPacket()
132         cmsg->cmsg_type  = IPV6_PKTINFO;  in transmitPacket()
133         cmsg->cmsg_len   = CMSG_LEN(sizeof(pktinfo));  in transmitPacket()
138         memcpy(CMSG_DATA(cmsg), &pktinfo, sizeof(pktinfo));  in transmitPacket()
186 …  for (struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg); cmsg != nullptr; cmsg = CMSG_NXTHDR(&msg, cmsg))  in receivePacket()  local
188         if (cmsg->cmsg_level == IPPROTO_IPV6)  in receivePacket()
190             if (cmsg->cmsg_type == IPV6_HOPLIMIT)  in receivePacket()
194                 memcpy(&hoplimit, CMSG_DATA(cmsg), sizeof(hoplimit));  in receivePacket()
197             else if (cmsg->cmsg_type == IPV6_PKTINFO)  in receivePacket()
201                 memcpy(&pktinfo, CMSG_DATA(cmsg), sizeof(pktinfo));  in receivePacket()