*/	    switch (EXTRACT_16BITS(&nak->pgmn_source_afi)) {	    case AFI_IP:		addr_size = sizeof(struct in_addr);		source_af = AF_INET;		break;#ifdef INET6	    case AFI_IP6:		addr_size = sizeof(struct in6_addr);		source_af = AF_INET6;		break;#endif	    default:		goto trunc;		break;	    }	    bp = (u_char *) (nak + 1);	    TCHECK2(*bp, addr_size);	    source = bp;	    bp += addr_size;	    /*	     * Skip past the group, saving info along the way	     * and stopping if we don't have enough.	     */	    switch (EXTRACT_16BITS(bp)) {	    case AFI_IP:		addr_size = sizeof(struct in_addr);		group_af = AF_INET;		break;#ifdef INET6	    case AFI_IP6:		addr_size = sizeof(struct in6_addr);		group_af = AF_INET6;		break;#endif	    default:		goto trunc;		break;	    }	    bp += (2 * sizeof(u_int16_t));	    TCHECK2(*bp, addr_size);	    group = bp;	    bp += addr_size;	    /*	     * Options decoding can go here.	     */	    inet_ntop(source_af, source, source_buf, sizeof(source_buf));	    inet_ntop(group_af, group, group_buf, sizeof(group_buf));	    switch (pgm->pgm_type) {		case PGM_NAK:		    (void)printf("NAK ");		    break;		case PGM_NULLNAK:		    (void)printf("NNAK ");		    break;		case PGM_NCF:		    (void)printf("NCF ");		    break;		default:                    break;	    }	    (void)printf("(%s -> %s), seq %u",			 source_buf, group_buf, EXTRACT_32BITS(&nak->pgmn_seq));	    break;	}	case PGM_SPMR:	    (void)printf("SPMR");	    break;	default:	    (void)printf("UNKNOWN type %0x02x", pgm->pgm_type);	    break;	}	if (pgm->pgm_options & PGM_OPT_BIT_PRESENT) {      	    /*	     * make sure there's enough for the first option header	     */	    if (!TTEST2(*bp, PGM_MIN_OPT_LEN)) {		(void)printf("[|OPT]");		return;	    } 	    /*	     * That option header MUST be an OPT_LENGTH option	     * (see the first paragraph of section 9.1 in RFC 3208).	     */	    opt_type = *bp++;	    if ((opt_type & PGM_OPT_MASK) != PGM_OPT_LENGTH) {		(void)printf("[First option bad, should be PGM_OPT_LENGTH, is %u]", opt_type & PGM_OPT_MASK);		return;	    }	    opt_len = *bp++;	    if (opt_len != 4) {		(void)printf("[Bad OPT_LENGTH option, length %u != 4]", opt_len);		return;	    }	    opts_len = EXTRACT_16BITS(bp);	    if (opts_len < 4) {		(void)printf("[Bad total option length %u < 4]", opts_len);		return;	    }	    bp += sizeof(u_int16_t);	    (void)printf(" OPTS LEN %d", opts_len);	    opts_len -= 4;	    while (opts_len) {		if (opts_len < PGM_MIN_OPT_LEN) {		    (void)printf("[Total option length leaves no room for final option]");		    return;		}		opt_type = *bp++;		opt_len = *bp++;		if (opt_len < PGM_MIN_OPT_LEN) {		    (void)printf("[Bad option, length %u < %u]", opt_len,		        PGM_MIN_OPT_LEN);		    break;		}		if (opts_len < opt_len) {		    (void)printf("[Total option length leaves no room for final option]");		    return;		}		if (!TTEST2(*bp, opt_len - 2)) {		    (void)printf(" [|OPT]");		    return;		} 		switch (opt_type & PGM_OPT_MASK) {		case PGM_OPT_LENGTH:		    if (opt_len != 4) {			(void)printf("[Bad OPT_LENGTH option, length %u != 4]", opt_len);			return;		    }		    (void)printf(" OPTS LEN (extra?) %d", EXTRACT_16BITS(bp));		    bp += sizeof(u_int16_t);		    opts_len -= 4;		    break;		case PGM_OPT_FRAGMENT:		    if (opt_len != 16) {			(void)printf("[Bad OPT_FRAGMENT option, length %u != 16]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    seq = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    offset = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    len = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    (void)printf(" FRAG seq %u off %u len %u", seq, offset, len);		    opts_len -= 16;		    break;		case PGM_OPT_NAK_LIST:		    flags1 = *bp++;		    flags2 = *bp++;		    opt_len -= sizeof(u_int32_t);	/* option header */		    (void)printf(" NAK LIST");		    while (opt_len) {			if (opt_len < sizeof(u_int32_t)) {			    (void)printf("[Option length not a multiple of 4]");			    return;			}			TCHECK2(*bp, sizeof(u_int32_t));			(void)printf(" %u", EXTRACT_32BITS(bp));			bp += sizeof(u_int32_t);			opt_len -= sizeof(u_int32_t);			opts_len -= sizeof(u_int32_t);		    }		    break;		case PGM_OPT_JOIN:		    if (opt_len != 8) {			(void)printf("[Bad OPT_JOIN option, length %u != 8]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    seq = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    (void)printf(" JOIN %u", seq);		    opts_len -= 8;		    break;		case PGM_OPT_NAK_BO_IVL:		    if (opt_len != 12) {			(void)printf("[Bad OPT_NAK_BO_IVL option, length %u != 12]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    offset = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    seq = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    (void)printf(" BACKOFF ivl %u ivlseq %u", offset, seq);		    opts_len -= 12;		    break;		case PGM_OPT_NAK_BO_RNG:		    if (opt_len != 12) {			(void)printf("[Bad OPT_NAK_BO_RNG option, length %u != 12]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    offset = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    seq = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    (void)printf(" BACKOFF max %u min %u", offset, seq);		    opts_len -= 12;		    break;		case PGM_OPT_REDIRECT:		    flags1 = *bp++;		    flags2 = *bp++;		    switch (EXTRACT_16BITS(bp)) {		    case AFI_IP:			addr_size = sizeof(struct in_addr);			nla_af = AF_INET;			break;#ifdef INET6		    case AFI_IP6:			addr_size = sizeof(struct in6_addr);			nla_af = AF_INET6;			break;#endif		    default:			goto trunc;			break;		    }		    bp += (2 * sizeof(u_int16_t));		    if (opt_len != 4 + addr_size) {			(void)printf("[Bad OPT_REDIRECT option, length %u != 4 + address size]", opt_len);			return;		    }		    TCHECK2(*bp, addr_size);		    nla = bp;		    bp += addr_size;		    inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));		    (void)printf(" REDIRECT %s",  (char *)nla);		    opts_len -= 4 + addr_size;		    break;		case PGM_OPT_PARITY_PRM:		    if (opt_len != 8) {			(void)printf("[Bad OPT_PARITY_PRM option, length %u != 8]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    len = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    (void)printf(" PARITY MAXTGS %u", len);		    opts_len -= 8;		    break;		case PGM_OPT_PARITY_GRP:		    if (opt_len != 8) {			(void)printf("[Bad OPT_PARITY_GRP option, length %u != 8]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    seq = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    (void)printf(" PARITY GROUP %u", seq);		    opts_len -= 8;		    break;		case PGM_OPT_CURR_TGSIZE:		    if (opt_len != 8) {			(void)printf("[Bad OPT_CURR_TGSIZE option, length %u != 8]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    len = EXTRACT_32BITS(bp);		    bp += sizeof(u_int32_t);		    (void)printf(" PARITY ATGS %u", len);		    opts_len -= 8;		    break;		case PGM_OPT_NBR_UNREACH:		    if (opt_len != 4) {			(void)printf("[Bad OPT_NBR_UNREACH option, length %u != 4]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    (void)printf(" NBR_UNREACH");		    opts_len -= 4;		    break;		case PGM_OPT_PATH_NLA:		    (void)printf(" PATH_NLA [%d]", opt_len);		    bp += opt_len;		    opts_len -= opt_len;		    break;		case PGM_OPT_SYN:		    if (opt_len != 4) {			(void)printf("[Bad OPT_SYN option, length %u != 4]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    (void)printf(" SYN");		    opts_len -= 4;		    break;		case PGM_OPT_FIN:		    if (opt_len != 4) {			(void)printf("[Bad OPT_FIN option, length %u != 4]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    (void)printf(" FIN");		    opts_len -= 4;		    break;		case PGM_OPT_RST:		    if (opt_len != 4) {			(void)printf("[Bad OPT_RST option, length %u != 4]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    (void)printf(" RST");		    opts_len -= 4;		    break;		case PGM_OPT_CR:		    (void)printf(" CR");		    bp += opt_len;		    opts_len -= opt_len;		    break;		case PGM_OPT_CRQST:		    if (opt_len != 4) {			(void)printf("[Bad OPT_CRQST option, length %u != 4]", opt_len);			return;		    }		    flags1 = *bp++;		    flags2 = *bp++;		    (void)printf(" CRQST");		    opts_len -= 4;		    break;		default:		    (void)printf(" OPT_%02X [%d] ", opt_type, opt_len);		    bp += opt_len;		    opts_len -= opt_len;		    break;		}		if (opt_type & PGM_OPT_END)		    break;	     }	}	(void)printf(" [%u]", EXTRACT_16BITS(&pgm->pgm_length));	return;trunc:	fputs("[|pgm]", stdout);	if (ch != '\0')		putchar('>');}