diff options
Diffstat (limited to 'print-rpki-rtr.c')
| -rw-r--r-- | print-rpki-rtr.c | 40 |
1 files changed, 17 insertions, 23 deletions
diff --git a/print-rpki-rtr.c b/print-rpki-rtr.c index 36be399..7d8d9a1 100644 --- a/print-rpki-rtr.c +++ b/print-rpki-rtr.c @@ -19,9 +19,7 @@ /* specification: RFC 6810 */ -#ifdef HAVE_CONFIG_H #include <config.h> -#endif #include "netdissect-stdinc.h" @@ -178,24 +176,24 @@ rpki_rtr_pdu_print(netdissect_options *ndo, const u_char *tptr, const u_int len, const rpki_rtr_pdu *pdu_header; u_int pdu_type, pdu_len, hexdump; const u_char *msg; + uint8_t pdu_ver; - /* Protocol Version */ - if (GET_U_1(tptr) != 0) { + if (len < sizeof(rpki_rtr_pdu)) { + ND_PRINT("(%u bytes is too few to decode)", len); + goto invalid; + } + pdu_header = (const rpki_rtr_pdu *)tptr; + pdu_ver = GET_U_1(pdu_header->version); + if (pdu_ver != 0) { /* Skip the rest of the input buffer because even if this is * a well-formed PDU of a future RPKI-Router protocol version * followed by a well-formed PDU of RPKI-Router protocol * version 0, there is no way to know exactly how to skip the * current PDU. */ - ND_PRINT("%sRPKI-RTRv%u (unknown)", indent_string(8), GET_U_1(tptr)); + ND_PRINT("%sRPKI-RTRv%u (unknown)", indent_string(8), pdu_ver); return len; } - if (len < sizeof(rpki_rtr_pdu)) { - ND_PRINT("(%u bytes is too few to decode)", len); - goto invalid; - } - ND_TCHECK_LEN(tptr, sizeof(rpki_rtr_pdu)); - pdu_header = (const rpki_rtr_pdu *)tptr; pdu_type = GET_U_1(pdu_header->pdu_type); pdu_len = GET_BE_U_4(pdu_header->length); /* Do not check bounds with pdu_len yet, do it in the case blocks @@ -206,7 +204,7 @@ rpki_rtr_pdu_print(netdissect_options *ndo, const u_char *tptr, const u_int len, ND_PRINT("%sRPKI-RTRv%u, %s PDU (%u), length: %u", indent_string(8), - GET_U_1(pdu_header->version), + pdu_ver, tok2str(rpki_rtr_pdu_values, "Unknown", pdu_type), pdu_type, pdu_len); if (pdu_len < sizeof(rpki_rtr_pdu) || pdu_len > len) @@ -291,13 +289,12 @@ rpki_rtr_pdu_print(netdissect_options *ndo, const u_char *tptr, const u_int len, /* Do not test for the "Length of Error Text" data element yet. */ if (pdu_len < tlen + 4) goto invalid; - ND_TCHECK_LEN(tptr, tlen + 4); - /* Safe up to and including the "Length of Encapsulated PDU" - * data element, more data elements may be present. - */ pdu = (const rpki_rtr_pdu_error_report *)tptr; encapsulated_pdu_length = GET_BE_U_4(pdu->encapsulated_pdu_length); tlen += 4; + /* Safe up to and including the "Length of Encapsulated PDU" + * data element, more data elements may be present. + */ error_code = GET_BE_U_2(pdu->pdu_header.u.error_code); ND_PRINT("%sError code: %s (%u), Encapsulated PDU length: %u", @@ -322,8 +319,7 @@ rpki_rtr_pdu_print(netdissect_options *ndo, const u_char *tptr, const u_int len, goto invalid; if (! recurse) { ND_TCHECK_LEN(tptr, tlen + encapsulated_pdu_length); - } - else { + } else { ND_PRINT("%s-----encapsulated PDU-----", indent_string(indent+4)); rpki_rtr_pdu_print(ndo, tptr + tlen, encapsulated_pdu_length, 0, indent + 2); @@ -333,16 +329,14 @@ rpki_rtr_pdu_print(netdissect_options *ndo, const u_char *tptr, const u_int len, if (pdu_len < tlen + 4) goto invalid; - ND_TCHECK_LEN(tptr, tlen + 4); - /* Safe up to and including the "Length of Error Text" data element, - * one more data element may be present. - */ - /* * Extract, trail-zero and print the Error message. */ text_length = GET_BE_U_4(tptr + tlen); tlen += 4; + /* Safe up to and including the "Length of Error Text" data element, + * one more data element may be present. + */ if (text_length) { if (pdu_len < tlen + text_length) |