X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/c6d472bf63488b0c2ab7ab9f4b32c68dd2c8ea2b..00b189d27cd235c958497d9b1aca6d3addd55d43:/print-ldp.c diff --git a/print-ldp.c b/print-ldp.c index 3f741d13..1131fe55 100644 --- a/print-ldp.c +++ b/print-ldp.c @@ -10,18 +10,19 @@ * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. * - * Original code by Hannes Gredler (hannes@juniper.net) + * Original code by Hannes Gredler (hannes@gredler.at) * and Steinar Haug (sthaug@nethelp.no) */ -#define NETDISSECT_REWORKED +/* \summary: Label Distribution Protocol (LDP) printer */ + #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include +#include -#include "interface.h" +#include "netdissect.h" #include "extract.h" #include "addrtoname.h" @@ -250,13 +251,13 @@ ldp_tlv_print(netdissect_options *ndo, ldp_tlv_header = (const struct ldp_tlv_header *)tptr; ND_TCHECK(*ldp_tlv_header); - tlv_len=EXTRACT_16BITS(ldp_tlv_header->length); + tlv_len=EXTRACT_BE_U_2(ldp_tlv_header->length); if (tlv_len + 4 > msg_tlen) { ND_PRINT((ndo, "\n\t\t TLV contents go past end of message")); return 0; } tlv_tlen=tlv_len; - tlv_type=LDP_MASK_TLV_TYPE(EXTRACT_16BITS(ldp_tlv_header->type)); + tlv_type=LDP_MASK_TLV_TYPE(EXTRACT_BE_U_2(ldp_tlv_header->type)); /* FIXME vendor private / experimental check */ ND_PRINT((ndo, "\n\t %s TLV (0x%04x), length: %u, Flags: [%s and %s forward if unknown]", @@ -265,8 +266,8 @@ ldp_tlv_print(netdissect_options *ndo, tlv_type), tlv_type, tlv_len, - LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "continue processing" : "ignore", - LDP_MASK_F_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "do" : "don't")); + LDP_MASK_U_BIT(EXTRACT_BE_U_2(&ldp_tlv_header->type)) ? "continue processing" : "ignore", + LDP_MASK_F_BIT(EXTRACT_BE_U_2(&ldp_tlv_header->type)) ? "do" : "don't")); tptr+=sizeof(struct ldp_tlv_header); @@ -275,29 +276,27 @@ ldp_tlv_print(netdissect_options *ndo, case LDP_TLV_COMMON_HELLO: TLV_TCHECK(4); ND_PRINT((ndo, "\n\t Hold Time: %us, Flags: [%s Hello%s]", - EXTRACT_16BITS(tptr), - (EXTRACT_16BITS(tptr+2)&0x8000) ? "Targeted" : "Link", - (EXTRACT_16BITS(tptr+2)&0x4000) ? ", Request for targeted Hellos" : "")); + EXTRACT_BE_U_2(tptr), + (EXTRACT_BE_U_2(tptr + 2)&0x8000) ? "Targeted" : "Link", + (EXTRACT_BE_U_2(tptr + 2)&0x4000) ? ", Request for targeted Hellos" : "")); break; case LDP_TLV_IPV4_TRANSPORT_ADDR: TLV_TCHECK(4); ND_PRINT((ndo, "\n\t IPv4 Transport Address: %s", ipaddr_string(ndo, tptr))); break; -#ifdef INET6 case LDP_TLV_IPV6_TRANSPORT_ADDR: TLV_TCHECK(16); ND_PRINT((ndo, "\n\t IPv6 Transport Address: %s", ip6addr_string(ndo, tptr))); break; -#endif case LDP_TLV_CONFIG_SEQ_NUMBER: TLV_TCHECK(4); - ND_PRINT((ndo, "\n\t Sequence Number: %u", EXTRACT_32BITS(tptr))); + ND_PRINT((ndo, "\n\t Sequence Number: %u", EXTRACT_BE_U_4(tptr))); break; case LDP_TLV_ADDRESS_LIST: TLV_TCHECK(LDP_TLV_ADDRESS_LIST_AFNUM_LEN); - af = EXTRACT_16BITS(tptr); + af = EXTRACT_BE_U_2(tptr); tptr+=LDP_TLV_ADDRESS_LIST_AFNUM_LEN; tlv_tlen -= LDP_TLV_ADDRESS_LIST_AFNUM_LEN; ND_PRINT((ndo, "\n\t Address Family: %s, addresses", @@ -311,7 +310,6 @@ ldp_tlv_print(netdissect_options *ndo, tptr+=sizeof(struct in_addr); } break; -#ifdef INET6 case AFNUM_INET6: while(tlv_tlen >= sizeof(struct in6_addr)) { ND_TCHECK2(*tptr, sizeof(struct in6_addr)); @@ -320,7 +318,6 @@ ldp_tlv_print(netdissect_options *ndo, tptr+=sizeof(struct in6_addr); } break; -#endif default: /* unknown AF */ break; @@ -330,9 +327,9 @@ ldp_tlv_print(netdissect_options *ndo, case LDP_TLV_COMMON_SESSION: TLV_TCHECK(8); ND_PRINT((ndo, "\n\t Version: %u, Keepalive: %us, Flags: [Downstream %s, Loop Detection %s]", - EXTRACT_16BITS(tptr), EXTRACT_16BITS(tptr+2), - (EXTRACT_16BITS(tptr+6)&0x8000) ? "On Demand" : "Unsolicited", - (EXTRACT_16BITS(tptr+6)&0x4000) ? "Enabled" : "Disabled" + EXTRACT_BE_U_2(tptr), EXTRACT_BE_U_2(tptr + 2), + (EXTRACT_BE_U_2(tptr + 6)&0x8000) ? "On Demand" : "Unsolicited", + (EXTRACT_BE_U_2(tptr + 6)&0x4000) ? "Enabled" : "Disabled" )); break; @@ -351,7 +348,7 @@ ldp_tlv_print(netdissect_options *ndo, break; case LDP_FEC_PREFIX: TLV_TCHECK(2); - af = EXTRACT_16BITS(tptr); + af = EXTRACT_BE_U_2(tptr); tptr+=LDP_TLV_ADDRESS_LIST_AFNUM_LEN; tlv_tlen-=LDP_TLV_ADDRESS_LIST_AFNUM_LEN; if (af == AFNUM_INET) { @@ -365,7 +362,6 @@ ldp_tlv_print(netdissect_options *ndo, else ND_PRINT((ndo, ": IPv4 prefix %s", buf)); } -#ifdef INET6 else if (af == AFNUM_INET6) { i=decode_prefix6(ndo, tptr, tlv_tlen, buf, sizeof(buf)); if (i == -2) @@ -377,26 +373,29 @@ ldp_tlv_print(netdissect_options *ndo, else ND_PRINT((ndo, ": IPv6 prefix %s", buf)); } -#endif else ND_PRINT((ndo, ": Address family %u prefix", af)); break; case LDP_FEC_HOSTADDRESS: break; case LDP_FEC_MARTINI_VC: + /* + * We assume the type was supposed to be one of the MPLS + * Pseudowire Types. + */ + TLV_TCHECK(7); + vc_info_len = EXTRACT_U_1(tptr + 2); + /* * According to RFC 4908, the VC info Length field can be zero, * in which case not only are there no interface parameters, * there's no VC ID. */ - TLV_TCHECK(7); - vc_info_len = *(tptr+2); - if (vc_info_len == 0) { ND_PRINT((ndo, ": %s, %scontrol word, group-ID %u, VC-info-length: %u", - tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff), - EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ", - EXTRACT_32BITS(tptr+3), + tok2str(mpls_pw_types_values, "Unknown", EXTRACT_BE_U_2(tptr)&0x7fff), + EXTRACT_BE_U_2(tptr)&0x8000 ? "" : "no ", + EXTRACT_BE_U_4(tptr + 3), vc_info_len)); break; } @@ -404,11 +403,11 @@ ldp_tlv_print(netdissect_options *ndo, /* Make sure we have the VC ID as well */ TLV_TCHECK(11); ND_PRINT((ndo, ": %s, %scontrol word, group-ID %u, VC-ID %u, VC-info-length: %u", - tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff), - EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ", - EXTRACT_32BITS(tptr+3), - EXTRACT_32BITS(tptr+7), - vc_info_len)); + tok2str(mpls_pw_types_values, "Unknown", EXTRACT_BE_U_2(tptr)&0x7fff), + EXTRACT_BE_U_2(tptr)&0x8000 ? "" : "no ", + EXTRACT_BE_U_4(tptr + 3), + EXTRACT_BE_U_4(tptr + 7), + vc_info_len)); if (vc_info_len < 4) { /* minimum 4, for the VC ID */ ND_PRINT((ndo, " (invalid, < 4")); @@ -423,7 +422,7 @@ ldp_tlv_print(netdissect_options *ndo, while (vc_info_len > 2) { vc_info_tlv_type = *tptr; - vc_info_tlv_len = *(tptr+1); + vc_info_tlv_len = EXTRACT_U_1(tptr + 1); if (vc_info_tlv_len < 2) break; if (vc_info_len < vc_info_tlv_len) @@ -436,22 +435,22 @@ ldp_tlv_print(netdissect_options *ndo, switch(vc_info_tlv_type) { case LDP_FEC_MARTINI_IFPARM_MTU: - ND_PRINT((ndo, ": %u", EXTRACT_16BITS(tptr+2))); + ND_PRINT((ndo, ": %u", EXTRACT_BE_U_2(tptr + 2))); break; case LDP_FEC_MARTINI_IFPARM_DESC: ND_PRINT((ndo, ": ")); for (idx = 2; idx < vc_info_tlv_len; idx++) - safeputchar(ndo, *(tptr + idx)); + safeputchar(ndo, EXTRACT_U_1(tptr + idx)); break; case LDP_FEC_MARTINI_IFPARM_VCCV: ND_PRINT((ndo, "\n\t\t Control Channels (0x%02x) = [%s]", - *(tptr+2), - bittok2str(ldp_fec_martini_ifparm_vccv_cc_values, "none", *(tptr+2)))); + EXTRACT_U_1((tptr + 2)), + bittok2str(ldp_fec_martini_ifparm_vccv_cc_values, "none", EXTRACT_U_1((tptr + 2))))); ND_PRINT((ndo, "\n\t\t CV Types (0x%02x) = [%s]", - *(tptr+3), - bittok2str(ldp_fec_martini_ifparm_vccv_cv_values, "none", *(tptr+3)))); + EXTRACT_U_1((tptr + 3)), + bittok2str(ldp_fec_martini_ifparm_vccv_cv_values, "none", EXTRACT_U_1((tptr + 3))))); break; default: @@ -469,18 +468,18 @@ ldp_tlv_print(netdissect_options *ndo, case LDP_TLV_GENERIC_LABEL: TLV_TCHECK(4); - ND_PRINT((ndo, "\n\t Label: %u", EXTRACT_32BITS(tptr) & 0xfffff)); + ND_PRINT((ndo, "\n\t Label: %u", EXTRACT_BE_U_4(tptr) & 0xfffff)); break; case LDP_TLV_STATUS: TLV_TCHECK(8); - ui = EXTRACT_32BITS(tptr); + ui = EXTRACT_BE_U_4(tptr); tptr+=4; ND_PRINT((ndo, "\n\t Status: 0x%02x, Flags: [%s and %s forward]", ui&0x3fffffff, ui&0x80000000 ? "Fatal error" : "Advisory Notification", ui&0x40000000 ? "do" : "don't")); - ui = EXTRACT_32BITS(tptr); + ui = EXTRACT_BE_U_4(tptr); tptr+=4; if (ui) ND_PRINT((ndo, ", causing Message ID: 0x%08x", ui)); @@ -488,7 +487,7 @@ ldp_tlv_print(netdissect_options *ndo, case LDP_TLV_FT_SESSION: TLV_TCHECK(8); - ft_flags = EXTRACT_16BITS(tptr); + ft_flags = EXTRACT_BE_U_2(tptr); ND_PRINT((ndo, "\n\t Flags: [%sReconnect, %sSave State, %sAll-Label Protection, %s Checkpoint, %sRe-Learn State]", ft_flags&0x8000 ? "" : "No ", ft_flags&0x8 ? "" : "Don't ", @@ -496,18 +495,18 @@ ldp_tlv_print(netdissect_options *ndo, ft_flags&0x2 ? "Sequence Numbered Label" : "All Labels", ft_flags&0x1 ? "" : "Don't ")); tptr+=4; - ui = EXTRACT_32BITS(tptr); + ui = EXTRACT_BE_U_4(tptr); if (ui) ND_PRINT((ndo, ", Reconnect Timeout: %ums", ui)); tptr+=4; - ui = EXTRACT_32BITS(tptr); + ui = EXTRACT_BE_U_4(tptr); if (ui) ND_PRINT((ndo, ", Recovery Time: %ums", ui)); break; case LDP_TLV_MTU: TLV_TCHECK(2); - ND_PRINT((ndo, "\n\t MTU: %u", EXTRACT_16BITS(tptr))); + ND_PRINT((ndo, "\n\t MTU: %u", EXTRACT_BE_U_2(tptr))); break; @@ -574,20 +573,20 @@ ldp_pdu_print(netdissect_options *ndo, /* * Sanity checking of the header. */ - if (EXTRACT_16BITS(&ldp_com_header->version) != LDP_VERSION) { + if (EXTRACT_BE_U_2(&ldp_com_header->version) != LDP_VERSION) { ND_PRINT((ndo, "%sLDP version %u packet not supported", (ndo->ndo_vflag < 1) ? "" : "\n\t", - EXTRACT_16BITS(&ldp_com_header->version))); + EXTRACT_BE_U_2(&ldp_com_header->version))); return 0; } - pdu_len = EXTRACT_16BITS(&ldp_com_header->pdu_length); - if (pdu_len < sizeof(const struct ldp_common_header)-4) { + pdu_len = EXTRACT_BE_U_2(&ldp_com_header->pdu_length); + if (pdu_len < sizeof(struct ldp_common_header)-4) { /* length too short */ ND_PRINT((ndo, "%sLDP, pdu-length: %u (too short, < %u)", (ndo->ndo_vflag < 1) ? "" : "\n\t", pdu_len, - (u_int)(sizeof(const struct ldp_common_header)-4))); + (u_int)(sizeof(struct ldp_common_header)-4))); return 0; } @@ -595,7 +594,7 @@ ldp_pdu_print(netdissect_options *ndo, ND_PRINT((ndo, "%sLDP, Label-Space-ID: %s:%u, pdu-length: %u", (ndo->ndo_vflag < 1) ? "" : "\n\t", ipaddr_string(ndo, &ldp_com_header->lsr_id), - EXTRACT_16BITS(&ldp_com_header->label_space), + EXTRACT_BE_U_2(&ldp_com_header->label_space), pdu_len)); /* bail out if non-verbose */ @@ -603,16 +602,16 @@ ldp_pdu_print(netdissect_options *ndo, return 0; /* ok they seem to want to know everything - lets fully decode it */ - tptr = pptr + sizeof(const struct ldp_common_header); - tlen = pdu_len - (sizeof(const struct ldp_common_header)-4); /* Type & Length fields not included */ + tptr = pptr + sizeof(struct ldp_common_header); + tlen = pdu_len - (sizeof(struct ldp_common_header)-4); /* Type & Length fields not included */ while(tlen>0) { /* did we capture enough for fully decoding the msg header ? */ ND_TCHECK2(*tptr, sizeof(struct ldp_msg_header)); ldp_msg_header = (const struct ldp_msg_header *)tptr; - msg_len=EXTRACT_16BITS(ldp_msg_header->length); - msg_type=LDP_MASK_MSG_TYPE(EXTRACT_16BITS(ldp_msg_header->type)); + msg_len=EXTRACT_BE_U_2(ldp_msg_header->length); + msg_type=LDP_MASK_MSG_TYPE(EXTRACT_BE_U_2(ldp_msg_header->type)); if (msg_len < sizeof(struct ldp_msg_header)-4) { /* length too short */ @@ -634,8 +633,8 @@ ldp_pdu_print(netdissect_options *ndo, msg_type), msg_type, msg_len, - EXTRACT_32BITS(&ldp_msg_header->id), - LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_msg_header->type)) ? "continue processing" : "ignore")); + EXTRACT_BE_U_4(&ldp_msg_header->id), + LDP_MASK_U_BIT(EXTRACT_BE_U_2(&ldp_msg_header->type)) ? "continue processing" : "ignore")); msg_tptr=tptr+sizeof(struct ldp_msg_header); msg_tlen=msg_len-(sizeof(struct ldp_msg_header)-4); /* Type & Length fields not included */