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#include <netinet/in.h>
uint16_t htons(uint16_t host16bitvalue);
uint32_t htonl(uint32_t host32bitvalue); //¾ù·µ»ØÍøÂç×Ö½ÚÐò
uint16_t ntohs(uint16_t net16bitvalue);
uint32_t ntohl(uint32_t net32bitvalue); //¾ù·µ»ØÖ÷»ú×Ö½ÚÐò 
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#include <arpa/inet.h>
int inet_aton(const char *strptr, struct in_addr *addrptr);
//·µ»Ø£º1——´®ÓÐЧ£¬0——´®Óдí
char* inet_ntoa(struct in_addr inaddr);
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in_addr_t inet_addr(const char *strptr);
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#include <netinet/in.h>
#define INET_ADDRSTRLEN 16
#define INET6_ADDRSTRLEN 46
#include <arpa/inet.h>
int inet_pton(int family, const char *strptr, void *addrptr);
//·µ»Ø£º1——³É¹¦£¬ÊäÈëµÄ²»ÊÇÓÐЧ±í´ï¸ñʽ£¬-1——³ö´í
const char* inet_ntop(int family, const void *addrptr, char *strptr, size_t len);
//·µ»Ø£ºÖ¸Ïò½á¹ûµÄÖ¸Õë——³É¹¦£¬NULL——³ö´í 


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