ah_data
canip->ah_data = oip->ah_data + oip->ah_len;
canip->ah_data = (char *)ipbuffer;
return(void *)canip->ah_data;
u_char *s = (u_char *)*arg, *t = (u_char *)canip->ah_data, c;
len = t - (u_char *)canip->ah_data;
if ((len = read(fd, canip->ah_data, sb.st_size)) == -1) {