java socket 域名解析_[原]socket通信实现域名解析

//extern unsigned char gSntpServerIP[20];

int GetNTPTime(unsigned char *ntpServerIP,unsigned int ntpPort,unsigned int *data)

{int sockfd=0;char ntpServerName[20];

STNP_Header H_NTP;

H_NTP.LiVnMode= 0x1b;//LI(2bit ) VN(3bit 版本) Mode(3bit客户端模式)

H_NTP.Stratum =STRATUM;

H_NTP.Poll=POLL;

H_NTP.Precision=PREC;

memset(ntpServerName,0,sizeof(ntpServerName));

sprintf(ntpServerName,"%s",ntpServerIP);

NF_LOG(DEBUG_K,"@_@,sync time from %s,H_NTP.Stratum=%dn", ntpServerName,H_NTP.Stratum);#if 0//不能解析域名的方式

structsockaddr_in server;

server.sin_family=AF_INET;

server.sin_addr.s_addr= gethostIPbyname((const char*)ntpServerName);

server.sin_port=htons(ntpPort);if(-1 == (int)server.sin_addr.s_addr)

{

NF_LOG(ERROR_L,"[%s,%d]s_addr error...n",__F