?? unp.h
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#ifndef _UNP_H_#define _UNP_H_#include <sys/socket.h>#include <netinet/in.h>#ifdef __cplusplusextern "C"{#endifunsigned short in_cksum(unsigned short *addr, int len);int mcast_setif(int sockfd, unsigned int ifindex, const char *ifname);int mcast_setloop(int sockfd, int loop);int mcast_join(int sockfd, const struct sockaddr *sockaddr,socklen_t addrlen, unsigned int ifindex, const char *ifname);int getifaddr(int family, unsigned int ifindex, const char *ifname, void *ifaddr);#ifdef __cplusplus}#endif#endif
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