char * strerror(int errnum)
char * strncpy(char *s1, char *s2, size_t n)
void * memset(void *b, int c, size_t n)
+ void * memcpy(void *s1, void *s2, size_t n)
+
+cdef extern from "stdlib.h":
+ void * malloc(size_t size)
+ void free(void *)
cdef extern from "netinet/in.h":
struct in_addr: