u_int chdlc_print(register const u_char *p, u_int length) { u_int proto; proto = EXTRACT_16BITS(&p[2]); if (eflag) { printf("%s, ethertype %s (0x%04x), length %u: ", tok2str(chdlc_cast_values, "0x%02x", p[0]), tok2str(ethertype_values, "Unknown", proto), proto, length); } length -= CHDLC_HDRLEN; p += CHDLC_HDRLEN; switch (proto) { case ETHERTYPE_IP: ip_print(gndo, p, length); break; #ifdef INET6 case ETHERTYPE_IPV6: ip6_print(p, length); break; #endif case CHDLC_TYPE_SLARP: chdlc_slarp_print(p, length); break; #if 0 case CHDLC_TYPE_CDP: chdlc_cdp_print(p, length); break; #endif case ETHERTYPE_MPLS: case ETHERTYPE_MPLS_MULTI: mpls_print(p, length); break; case ETHERTYPE_ISO: /* is the fudge byte set ? lets verify by spotting ISO headers */ if (*(p+1) == 0x81 || *(p+1) == 0x82 || *(p+1) == 0x83) isoclns_print(p+1, length-1, length-1); else isoclns_print(p, length, length); break; default: if (!eflag) printf("unknown CHDLC protocol (0x%04x)", proto); break; } return (CHDLC_HDRLEN); }
u_int chdlc_print(netdissect_options *ndo, register const u_char *p, u_int length) { u_int proto; const u_char *bp = p; if (length < CHDLC_HDRLEN) goto trunc; ND_TCHECK2(*p, CHDLC_HDRLEN); proto = EXTRACT_16BITS(&p[2]); if (ndo->ndo_eflag) { ND_PRINT((ndo, "%s, ethertype %s (0x%04x), length %u: ", tok2str(chdlc_cast_values, "0x%02x", p[0]), tok2str(ethertype_values, "Unknown", proto), proto, length)); } length -= CHDLC_HDRLEN; p += CHDLC_HDRLEN; switch (proto) { case ETHERTYPE_IP: ip_print(ndo, p, length); break; case ETHERTYPE_IPV6: ip6_print(ndo, p, length); break; case CHDLC_TYPE_SLARP: chdlc_slarp_print(ndo, p, length); break; #if 0 case CHDLC_TYPE_CDP: chdlc_cdp_print(p, length); break; #endif case ETHERTYPE_MPLS: case ETHERTYPE_MPLS_MULTI: mpls_print(ndo, p, length); break; case ETHERTYPE_ISO: /* is the fudge byte set ? lets verify by spotting ISO headers */ if (length < 2) goto trunc; ND_TCHECK_16BITS(p); if (*(p+1) == 0x81 || *(p+1) == 0x82 || *(p+1) == 0x83) isoclns_print(ndo, p + 1, length - 1); else isoclns_print(ndo, p, length); break; default: if (!ndo->ndo_eflag) ND_PRINT((ndo, "unknown CHDLC protocol (0x%04x)", proto)); break; } return (CHDLC_HDRLEN); trunc: ND_PRINT((ndo, "[|chdlc]")); return ndo->ndo_snapend - bp; }
u_int chdlc_print(netdissect_options *ndo, const u_char *p, u_int length) { u_int proto; const u_char *bp = p; ndo->ndo_protocol = "chdlc"; if (length < CHDLC_HDRLEN) goto trunc; ND_TCHECK_LEN(p, CHDLC_HDRLEN); proto = GET_BE_U_2(p + 2); if (ndo->ndo_eflag) { ND_PRINT("%s, ethertype %s (0x%04x), length %u: ", tok2str(chdlc_cast_values, "0x%02x", GET_U_1(p)), tok2str(ethertype_values, "Unknown", proto), proto, length); } length -= CHDLC_HDRLEN; p += CHDLC_HDRLEN; switch (proto) { case ETHERTYPE_IP: ip_print(ndo, p, length); break; case ETHERTYPE_IPV6: ip6_print(ndo, p, length); break; case CHDLC_TYPE_SLARP: chdlc_slarp_print(ndo, p, length); break; #if 0 case CHDLC_TYPE_CDP: chdlc_cdp_print(p, length); break; #endif case ETHERTYPE_MPLS: case ETHERTYPE_MPLS_MULTI: mpls_print(ndo, p, length); break; case ETHERTYPE_ISO: /* is the fudge byte set ? lets verify by spotting ISO headers */ if (length < 2) goto trunc; ND_TCHECK_2(p); if (GET_U_1(p + 1) == NLPID_CLNP || GET_U_1(p + 1) == NLPID_ESIS || GET_U_1(p + 1) == NLPID_ISIS) isoclns_print(ndo, p + 1, length - 1); else isoclns_print(ndo, p, length); break; default: if (!ndo->ndo_eflag) ND_PRINT("unknown CHDLC protocol (0x%04x)", proto); break; } return (CHDLC_HDRLEN); trunc: nd_print_trunc(ndo); return (ND_BYTES_AVAILABLE_AFTER(bp)); }