I want to modify the dhcp4 source code to notify the ddns server to set the dynamic domain name when assigning the lease, but I added the nanomsg statement in dhcp4_srv.cc. When my nanomsg performs shutdown or close, the dhcp4 service will automatically close. This is why there is no other way to implement dynamic domain names (my dynamic domain name mainly sends the field set by the foreground and the mac address and IP address to the ddns server, or it may be the login account of the foreground). Someone can help me? thank you very much.
if (lease) {
// We have a lease! Let's set it in the packet and send it back to
// the client.
// 我们有租约！ 让我们在数据包中进行设置，然后将其发送回客户端。
if (fake_allocation) {
//租约建议
LOG_INFO(lease4_logger, DHCP4_LEASE_ADVERT)
.arg(query->getLabel())
.arg(lease->addr_.toText());
} else {
//成功授予租约
LOG_INFO(lease4_logger, DHCP4_LEASE_ALLOC)
.arg(query->getLabel())
.arg(lease->addr_.toText())
.arg(lease->valid_lft_);
int rc = 0;
int pair_socket = 0;
int str_len = 0;
char buf[256] = { 0 };
char buf1[256] = { 0 };
int timeo = 5000;
//计算长度
str_len = strlen(HELLOWORLD);
//初始化socket
pair_socket = nn_socket(1, NN_PAIR);
if (pair_socket == -1) {
printf("nn_socket failed! error: %s.\n", nn_err_strerror(errno));
//system("pause");
nn_err_abort();
//return 0;
}
//设置超时
rc = nn_setsockopt(pair_socket, 0, NN_SNDTIMEO, &timeo, sizeof(timeo));
rc = nn_setsockopt(pair_socket, 0, NN_RCVTIMEO, &timeo, sizeof(timeo));
//连接服务端
rc = nn_connect(pair_socket, SOCKET_ADDRESS2);
if (rc < 0) {
printf("bind failed! error: %s.\n", nn_err_strerror(errno));
//system("pause");
nn_err_abort();
//return 0;
}
//将hello world复制到buf中
memcpy(buf, HELLOWORLD, str_len);
//发送数据
rc = nn_send(pair_socket, buf, str_len, 0);
if (rc < 0) {
printf("nn_send failed! error: %s.rc = %d.\n", nn_err_strerror(errno), rc);
}
//打印
printf("send:%s\n", buf);
//这里主要是测试使用，平时项目不要使用标签
//接收数据
rc = nn_recv(pair_socket, buf1, 256, 0);
if (rc < 0) {
printf("nn_recv failed! error: %s.rc = %d.\n", nn_err_strerror(errno), rc);
}
//打印
printf("recv:%s\n", buf1);
memset(buf1, 0, 256);
//Sleep(1000);
//关闭套接字
rc = nn_shutdown(pair_socket, 1);
if (rc != 1) {
printf("nn_close failed! error: %s.\n", nn_err_strerror(errno));
//system("pause");
nn_err_abort();
//return 0;
}
std::cout << "testtttttttttttttttttttttttttttttttttt "
<< "hostnameeeeeeeeeeeeeeeeeeeeeeeeeeeeee:" << lease->hostname_ << std::endl;
std::cout << "testtttttttttttttttttttttttttttttttttt "
<< "ipppppppppppppppppppppppppppppppppppp:" << lease->addr_.toText() << std::endl;
std::cout << "lease ALLOC " << __LINE__ << " file name " << __FILE__
<< " HOST:" << lease->hostname_ << std::endl;
std::cout << "lease ALLOC " << __LINE__ << " file name " << __FILE__
<< " IP:" << lease->addr_.toText() << std::endl;
}
