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/* posix */ #include <sys/types.h> #include <unistd.h> #include <stdlib.h> #include <string.h> /* bsd extensions */ #include <sys/uio.h> #include <sys/socket.h> #include <netinet/in.h> unsigned long inet_addr(char *from) { struct in_addr in; if(inet_aton(from, &in) == 0) return INADDR_NONE; return in.s_addr; }