391 inet6_opt_init(void *extbuf, socklen_t extlen)  in inet6_opt_init()  argument
396 		if (extlen <= 0 || (extlen % 8))  in inet6_opt_init()
398 		ext->ip6e_len = (extlen >> 3) - 1;  in inet6_opt_init()
405 inet6_opt_append(void *extbuf, socklen_t extlen, int offset, u_int8_t type,  in inet6_opt_append()  argument
440 	if (extlen &&		/* XXX: right? */  in inet6_opt_append()
441 	    currentlen > extlen)  in inet6_opt_append()
470 inet6_opt_finish(void *extbuf, socklen_t extlen, int offset)  in inet6_opt_finish()  argument
478 		if (updatelen > extlen)  in inet6_opt_finish()
503 inet6_opt_next(void *extbuf, socklen_t extlen, int offset, u_int8_t *typep,  in inet6_opt_next()  argument
510 	if (extlen == 0 || (extlen % 8))  in inet6_opt_next()
512 	lim = (u_int8_t *)extbuf + extlen;  in inet6_opt_next()
552 inet6_opt_find(void *extbuf, socklen_t extlen, int offset, u_int8_t type,  in inet6_opt_find()  argument
559 	if (extlen == 0 || (extlen % 8))  in inet6_opt_find()
561 	lim = (u_int8_t *)extbuf + extlen;  in inet6_opt_find()