388 inet6_opt_init(void *extbuf, socklen_t extlen)  in inet6_opt_init()  argument
393 		if (extlen <= 0 || (extlen % 8))  in inet6_opt_init()
395 		ext->ip6e_len = (extlen >> 3) - 1;  in inet6_opt_init()
402 inet6_opt_append(void *extbuf, socklen_t extlen, int offset, u_int8_t type,  in inet6_opt_append()  argument
437 	if (extlen &&		/* XXX: right? */  in inet6_opt_append()
438 	    currentlen > extlen)  in inet6_opt_append()
467 inet6_opt_finish(void *extbuf, socklen_t extlen, int offset)  in inet6_opt_finish()  argument
475 		if (updatelen > extlen)  in inet6_opt_finish()
500 inet6_opt_next(void *extbuf, socklen_t extlen, int offset, u_int8_t *typep,  in inet6_opt_next()  argument
507 	if (extlen == 0 || (extlen % 8))  in inet6_opt_next()
509 	lim = (u_int8_t *)extbuf + extlen;  in inet6_opt_next()
549 inet6_opt_find(void *extbuf, socklen_t extlen, int offset, u_int8_t type,  in inet6_opt_find()  argument
556 	if (extlen == 0 || (extlen % 8))  in inet6_opt_find()
558 	lim = (u_int8_t *)extbuf + extlen;  in inet6_opt_find()