diff options
Diffstat (limited to 'contrib/tcpdump/print-fr.c')
-rw-r--r-- | contrib/tcpdump/print-fr.c | 115 |
1 files changed, 72 insertions, 43 deletions
diff --git a/contrib/tcpdump/print-fr.c b/contrib/tcpdump/print-fr.c index abc3cd7..d0956f6 100644 --- a/contrib/tcpdump/print-fr.c +++ b/contrib/tcpdump/print-fr.c @@ -23,7 +23,7 @@ #ifndef lint static const char rcsid[] _U_ = - "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.32.2.15 2006/02/01 14:39:56 hannes Exp $ (LBL)"; + "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.51 2006-06-23 22:20:32 hannes Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H @@ -102,7 +102,7 @@ struct tok frf_flag_values[] = { /* Finds out Q.922 address length, DLCI and flags. Returns 0 on success * save the flags dep. on address length */ -static int parse_q922_addr(const u_char *p, u_int *dlci, u_int *sdlcore, +static int parse_q922_addr(const u_char *p, u_int *dlci, u_int *addr_len, u_int8_t *flags) { if ((p[0] & FR_EA_BIT)) @@ -132,14 +132,26 @@ static int parse_q922_addr(const u_char *p, u_int *dlci, u_int *sdlcore, flags[3] = p[0] & 0x02; - if (p[0] & 0x02) - *sdlcore = p[0] >> 2; - else - *dlci = (*dlci << 6) | (p[0] >> 2); + *dlci = (*dlci << 6) | (p[0] >> 2); return 0; } +char *q922_string(const u_char *p) { + + static u_int dlci, addr_len; + static u_int8_t flags[4]; + static char buffer[sizeof("DLCI xxxxxxxxxx")]; + memset(buffer, 0, sizeof(buffer)); + + if (parse_q922_addr(p, &dlci, &addr_len, flags) == 0){ + snprintf(buffer, sizeof(buffer), "DLCI %u", dlci); + } + + return buffer; +} + + /* Frame Relay packet structure, with flags and CRC removed +---------------------------+ @@ -224,13 +236,12 @@ fr_print(register const u_char *p, u_int length) { u_int16_t extracted_ethertype; u_int dlci; - u_int sdlcore; u_int addr_len; u_int16_t nlpid; u_int hdr_len; u_int8_t flags[4]; - if (parse_q922_addr(p, &dlci, &sdlcore, &addr_len, flags)) { + if (parse_q922_addr(p, &dlci, &addr_len, flags)) { printf("Q.922, invalid address"); return 0; } @@ -732,25 +743,29 @@ q933_print(const u_char *p, u_int length) codeset = p[2]&0x0f; /* extract the codeset */ - if (p[2] == MSG_ANSI_LOCKING_SHIFT) - is_ansi = 1; + if (p[2] == MSG_ANSI_LOCKING_SHIFT) { + is_ansi = 1; + } printf("%s", eflag ? "" : "Q.933, "); /* printing out header part */ printf("%s, codeset %u", is_ansi ? "ANSI" : "CCITT", codeset); - if (p[0]) - printf(", Call Ref: 0x%02x", p[0]); - - if (vflag) - printf(", %s (0x%02x), length %u", - tok2str(fr_q933_msg_values,"unknown message",p[1]), - p[1], - length); - else - printf(", %s", - tok2str(fr_q933_msg_values,"unknown message 0x%02x",p[1])); + if (p[0]) { + printf(", Call Ref: 0x%02x", p[0]); + } + if (vflag) { + printf(", %s (0x%02x), length %u", + tok2str(fr_q933_msg_values, + "unknown message", p[1]), + p[1], + length); + } else { + printf(", %s", + tok2str(fr_q933_msg_values, + "unknown message 0x%02x", p[1])); + } olen = length; /* preserve the original length for non verbose mode */ @@ -758,49 +773,57 @@ q933_print(const u_char *p, u_int length) printf("[|q.933]"); return; } - length -= 2 - is_ansi; + length -= 2 + is_ansi; ptemp += 2 + is_ansi; /* Loop through the rest of IE */ - while (length > sizeof(struct ie_tlv_header_t )) { + while (length > sizeof(struct ie_tlv_header_t)) { ie_p = (struct ie_tlv_header_t *)ptemp; - if (length < sizeof(struct ie_tlv_header_t ) || - length < sizeof(struct ie_tlv_header_t ) + ie_p->ie_len) { - if (vflag) /* not bark if there is just a trailer */ + if (length < sizeof(struct ie_tlv_header_t) || + length < sizeof(struct ie_tlv_header_t) + ie_p->ie_len) { + if (vflag) { /* not bark if there is just a trailer */ printf("\n[|q.933]"); - else + } else { printf(", length %u",olen); + } return; } /* lets do the full IE parsing only in verbose mode * however some IEs (DLCI Status, Link Verify) - * are also intereststing in non-verbose mode */ - if (vflag) + * are also interestting in non-verbose mode */ + if (vflag) { printf("\n\t%s IE (0x%02x), length %u: ", - tok2str(fr_q933_ie_codesets[codeset],"unknown",ie_p->ie_type), + tok2str(fr_q933_ie_codesets[codeset], + "unknown", ie_p->ie_type), ie_p->ie_type, ie_p->ie_len); - + } + /* sanity check */ - if (ie_p->ie_type == 0 || ie_p->ie_len == 0) + if (ie_p->ie_type == 0 || ie_p->ie_len == 0) { return; + } - if (fr_q933_print_ie_codeset[codeset] != NULL) + if (fr_q933_print_ie_codeset[codeset] != NULL) { ie_is_known = fr_q933_print_ie_codeset[codeset](ie_p, ptemp); - - if (vflag >= 1 && !ie_is_known) + } + + if (vflag >= 1 && !ie_is_known) { print_unknown_data(ptemp+2,"\n\t",ie_p->ie_len); + } /* do we want to see a hexdump of the IE ? */ - if (vflag> 1 && ie_is_known) + if (vflag> 1 && ie_is_known) { print_unknown_data(ptemp+2,"\n\t ",ie_p->ie_len); + } length = length - ie_p->ie_len - 2; ptemp = ptemp + ie_p->ie_len + 2; } - if (!vflag) + if (!vflag) { printf(", length %u",olen); + } } static int @@ -812,24 +835,27 @@ fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, const u_char *p) case FR_LMI_ANSI_REPORT_TYPE_IE: /* fall through */ case FR_LMI_CCITT_REPORT_TYPE_IE: - if (vflag) + if (vflag) { printf("%s (%u)", tok2str(fr_lmi_report_type_ie_values,"unknown",p[2]), p[2]); + } return 1; case FR_LMI_ANSI_LINK_VERIFY_IE: /* fall through */ case FR_LMI_CCITT_LINK_VERIFY_IE: case FR_LMI_ANSI_LINK_VERIFY_IE_91: - if (!vflag) + if (!vflag) { printf(", "); + } printf("TX Seq: %3d, RX Seq: %3d", p[2], p[3]); return 1; case FR_LMI_ANSI_PVC_STATUS_IE: /* fall through */ case FR_LMI_CCITT_PVC_STATUS_IE: - if (!vflag) + if (!vflag) { printf(", "); + } /* now parse the DLCI information element. */ if ((ie_p->ie_len < 3) || (p[2] & 0x80) || @@ -838,14 +864,17 @@ fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, const u_char *p) ((ie_p->ie_len == 5) && ((p[3] & 0x80) || (p[4] & 0x80) || !(p[5] & 0x80))) || (ie_p->ie_len > 5) || - !(p[ie_p->ie_len + 1] & 0x80)) + !(p[ie_p->ie_len + 1] & 0x80)) { printf("Invalid DLCI IE"); + } dlci = ((p[2] & 0x3F) << 4) | ((p[3] & 0x78) >> 3); - if (ie_p->ie_len == 4) + if (ie_p->ie_len == 4) { dlci = (dlci << 6) | ((p[4] & 0x7E) >> 1); - else if (ie_p->ie_len == 5) + } + else if (ie_p->ie_len == 5) { dlci = (dlci << 13) | (p[4] & 0x7F) | ((p[5] & 0x7E) >> 1); + } printf("DLCI %u: status %s%s", dlci, p[ie_p->ie_len + 1] & 0x8 ? "New, " : "", |