server.c #include "stdio.h" #include "stdlib.h" #include "string.h" #include "sys/types.h" #include "sys/socket.h" #include "arpa/inet.h" #include "netinet/in.h" #define SA struct sockaddr struct IPmac { char ip[100]; char mac[100]; }; int main() { int sockfd,len,i; struct sockaddr_in servaddr; char buff[30],temp[30],ip[30],mac[30];