* o BAP support
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ppp.c,v 1.93 2004-03-18 10:59:15 hannes Exp $ (LBL)";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <pcap.h>
#include <stdio.h>
+#include <stdlib.h>
#include "interface.h"
#include "extract.h"
/* Protocol Codes defined in ppp.h */
-struct tok ppptype2str[] = {
+static const struct tok ppptype2str[] = {
{ PPP_IP, "IP" },
{ PPP_OSI, "OSI" },
{ PPP_NS, "NS" },
{ PPP_DECNET, "DECNET" },
{ PPP_APPLE, "APPLE" },
{ PPP_IPX, "IPX" },
- { PPP_VJC, "VJC" },
- { PPP_VJNC, "VJNC" },
+ { PPP_VJC, "VJC IP" },
+ { PPP_VJNC, "VJNC IP" },
{ PPP_BRPDU, "BRPDU" },
{ PPP_STII, "STII" },
{ PPP_VINES, "VINES" },
{ PPP_MPLS_UCAST, "MPLS" },
{ PPP_MPLS_MCAST, "MPLS" },
+ { PPP_COMP, "Compressed"},
+ { PPP_ML, "MLPPP"},
+ { PPP_IPV6, "IP6"},
{ PPP_HELLO, "HELLO" },
{ PPP_LUXCOM, "LUXCOM" },
{ PPP_IPXCP, "IPXCP" },
{ PPP_STIICP, "STIICP" },
{ PPP_VINESCP, "VINESCP" },
+ { PPP_IPV6CP, "IP6CP" },
{ PPP_MPLSCP, "MPLSCP" },
{ PPP_LCP, "LCP" },
{ PPP_PAP, "PAP" },
{ PPP_LQM, "LQM" },
{ PPP_CHAP, "CHAP" },
+ { PPP_EAP, "EAP" },
+ { PPP_SPAP, "SPAP" },
+ { PPP_SPAP_OLD, "Old-SPAP" },
{ PPP_BACP, "BACP" },
{ PPP_BAP, "BAP" },
- { PPP_MP, "ML" },
+ { PPP_MPCP, "MLPPP-CP" },
{ 0, NULL }
};
#define CPCODES_RESET_REQ 14 /* Reset-Request (CCP only) RFC1962 */
#define CPCODES_RESET_REP 15 /* Reset-Reply (CCP only) */
-struct tok cpcodes[] = {
+static const struct tok cpcodes[] = {
{CPCODES_VEXT, "Vendor-Extension"}, /* RFC2153 */
{CPCODES_CONF_REQ, "Conf-Request"},
{CPCODES_CONF_ACK, "Conf-Ack"},
"deprecated(15)", /* used to be a Compund-Frames */
"deprecated(16)", /* used to be a Nominal-Data-Encap */
"MRRU", /* (17) */
- "SSNHF", /* (18) */
+ "12-Bit seq #", /* (18) */
"End-Disc", /* (19) */
"Proprietary", /* (20) */
"DCE-Id", /* (21) */
"PPP-Muxing", /* (30) */
};
-/* IPV6CP - to be supported */
/* ECP - to be supported */
/* CCP Config Options */
/* 27-254 unassigned */
#define CCPOPT_RESV 255 /* RFC1962 */
-#define CCPOPT_MIN CCPOPT_OUI
-#define CCPOPT_MAX CCPOPT_DEFLATE /* XXX: should be CCPOPT_RESV but... */
-
-static const char *ccpconfopts[] = {
- "OUI", /* (0) */
- "Pred-1", /* (1) */
- "Pred-2", /* (2) */
- "Puddle", /* (3) */
- "unassigned(4)", /* (4) */
- "unassigned(5)", /* (5) */
- "unassigned(6)", /* (6) */
- "unassigned(7)", /* (7) */
- "unassigned(8)", /* (8) */
- "unassigned(9)", /* (9) */
- "unassigned(10)", /* (10) */
- "unassigned(11)", /* (11) */
- "unassigned(12)", /* (12) */
- "unassigned(13)", /* (13) */
- "unassigned(14)", /* (14) */
- "unassigned(15)", /* (15) */
- "HP-PPC", /* (16) */
- "Stac-LZS", /* (17) */
- "MPPC", /* (18) */
- "Gand-FZA", /* (19) */
- "V.42bis", /* (20) */
- "BSD-Comp", /* (21) */
- "unassigned(22)", /* (22) */
- "LZS-DCP", /* (23) */
- "MVRCA", /* (24) */
- "DEC", /* (25) */
- "Deflate", /* (26) */
+static const struct tok ccpconfopts_values[] = {
+ { CCPOPT_OUI, "OUI" },
+ { CCPOPT_PRED1, "Pred-1" },
+ { CCPOPT_PRED2, "Pred-2" },
+ { CCPOPT_PJUMP, "Puddle" },
+ { CCPOPT_HPPPC, "HP-PPC" },
+ { CCPOPT_STACLZS, "Stac-LZS" },
+ { CCPOPT_MPPC, "MPPC" },
+ { CCPOPT_GFZA, "Gand-FZA" },
+ { CCPOPT_V42BIS, "V.42bis" },
+ { CCPOPT_BSDCOMP, "BSD-Comp" },
+ { CCPOPT_LZSDCP, "LZS-DCP" },
+ { CCPOPT_MVRCA, "MVRCA" },
+ { CCPOPT_DEC, "DEC" },
+ { CCPOPT_DEFLATE, "Deflate" },
+ { CCPOPT_RESV, "Reserved"},
+ {0, NULL}
};
/* BACP Config Options */
#define BACPOPT_FPEER 1 /* RFC2125 */
+static const struct tok bacconfopts_values[] = {
+ { BACPOPT_FPEER, "Favored-Peer" },
+ {0, NULL}
+};
+
+
/* SDCP - to be supported */
/* IPCP Config Options */
-
#define IPCPOPT_2ADDR 1 /* RFC1172, RFC1332 (deprecated) */
#define IPCPOPT_IPCOMP 2 /* RFC1332 */
#define IPCPOPT_ADDR 3 /* RFC1332 */
#define IPCPOPT_MOBILE4 4 /* RFC2290 */
-
#define IPCPOPT_PRIDNS 129 /* RFC1877 */
#define IPCPOPT_PRINBNS 130 /* RFC1877 */
#define IPCPOPT_SECDNS 131 /* RFC1877 */
#define IPCPOPT_SECNBNS 132 /* RFC1877 */
+static const struct tok ipcpopt_values[] = {
+ { IPCPOPT_2ADDR, "IP-Addrs" },
+ { IPCPOPT_IPCOMP, "IP-Comp" },
+ { IPCPOPT_ADDR, "IP-Addr" },
+ { IPCPOPT_MOBILE4, "Home-Addr" },
+ { IPCPOPT_PRIDNS, "Pri-DNS" },
+ { IPCPOPT_PRINBNS, "Pri-NBNS" },
+ { IPCPOPT_SECDNS, "Sec-DNS" },
+ { IPCPOPT_SECNBNS, "Sec-NBNS" },
+ { 0, NULL }
+};
+
+#define IPCPOPT_IPCOMP_HDRCOMP 0x61 /* rfc3544 */
+#define IPCPOPT_IPCOMP_MINLEN 14
+
+static const struct tok ipcpopt_compproto_values[] = {
+ { PPP_VJC, "VJ-Comp" },
+ { IPCPOPT_IPCOMP_HDRCOMP, "IP Header Compression" },
+ { 0, NULL }
+};
+
+static const struct tok ipcpopt_compproto_subopt_values[] = {
+ { 1, "RTP-Compression" },
+ { 2, "Enhanced RTP-Compression" },
+ { 0, NULL }
+};
+
+/* IP6CP Config Options */
+#define IP6CP_IFID 1
+
+static const struct tok ip6cpopt_values[] = {
+ { IP6CP_IFID, "Interface-ID" },
+ { 0, NULL }
+};
+
/* ATCP - to be supported */
/* OSINLCP - to be supported */
/* BVCP - to be supported */
#define AUTHALG_MSCHAP1 128 /* RFC2433 */
#define AUTHALG_MSCHAP2 129 /* RFC2795 */
+static const struct tok authalg_values[] = {
+ { AUTHALG_CHAPMD5, "MD5" },
+ { AUTHALG_MSCHAP1, "MS-CHAPv1" },
+ { AUTHALG_MSCHAP2, "MS-CHAPv2" },
+ { 0, NULL }
+};
+
/* FCS Alternatives - to be supported */
/* Multilink Endpoint Discriminator (RFC1717) */
#define CALLBACK_X500 4 /* X.500 distinguished name */
#define CALLBACK_CBCP 6 /* Location is determined during CBCP nego */
+static const struct tok ppp_callback_values[] = {
+ { CALLBACK_AUTH, "UserAuth" },
+ { CALLBACK_DSTR, "DialString" },
+ { CALLBACK_LID, "LocalID" },
+ { CALLBACK_E164, "E.164" },
+ { CALLBACK_X500, "X.500" },
+ { CALLBACK_CBCP, "CBCP" },
+ { 0, NULL }
+};
+
/* CHAP */
#define CHAP_CHAL 1
#define CHAP_SUCC 3
#define CHAP_FAIL 4
-#define CHAP_CODEMIN CHAP_CHAL
-#define CHAP_CODEMAX CHAP_FAIL
-
-static const char *chapcode[] = {
- "Chal", /* (1) */
- "Resp", /* (2) */
- "Succ", /* (3) */
- "Fail", /* (4) */
+static const struct tok chapcode_values[] = {
+ { CHAP_CHAL, "Challenge" },
+ { CHAP_RESP, "Response" },
+ { CHAP_SUCC, "Success" },
+ { CHAP_FAIL, "Fail" },
+ { 0, NULL}
};
/* PAP */
#define PAP_AACK 2
#define PAP_ANAK 3
-#define PAP_CODEMIN PAP_AREQ
-#define PAP_CODEMAX PAP_ANAK
-
-static const char *papcode[] = {
- "Auth-Req", /* (1) */
- "Auth-Ack", /* (2) */
- "Auth-Nak", /* (3) */
+static const struct tok papcode_values[] = {
+ { PAP_AREQ, "Auth-Req" },
+ { PAP_AACK, "Auth-ACK" },
+ { PAP_ANAK, "Auth-NACK" },
+ { 0, NULL }
};
/* BAP */
static void handle_chap (const u_char *p, int length);
static void handle_pap (const u_char *p, int length);
static void handle_bap (const u_char *p, int length);
+static void handle_mlppp(const u_char *p, int length);
static int print_lcp_config_options (const u_char *p, int);
static int print_ipcp_config_options (const u_char *p, int);
+static int print_ip6cp_config_options (const u_char *p, int);
static int print_ccp_config_options (const u_char *p, int);
static int print_bacp_config_options (const u_char *p, int);
static void handle_ppp (u_int proto, const u_char *p, int length);
+static void ppp_hdlc(const u_char *p, int length);
/* generic Control Protocol (e.g. LCP, IPCP, CCP, etc.) handler */
static void
handle_ctrl_proto(u_int proto, const u_char *pptr, int length)
{
+ const char *typestr;
u_int code, len;
int (*pfunc)(const u_char *, int);
int x, j;
tptr=pptr;
- printf("%s, ",tok2str(ppptype2str, "unknown", proto));
+ typestr = tok2str(ppptype2str, "unknown ctrl-proto (0x%04x)", proto);
+ printf("%s, ",typestr);
if (length < 4) /* FIXME weak boundary checking */
- return;
+ goto trunc;
+ TCHECK2(*tptr, 2);
code = *tptr++;
-
- printf("%s (0x%02x), id %u",
+
+ printf("%s (0x%02x), id %u, length %u",
tok2str(cpcodes, "Unknown Opcode",code),
- code,
- *tptr++); /* ID */
+ code,
+ *tptr++, /* ID */
+ length+2);
+
+ if (!vflag)
+ return;
+ if (length <= 4)
+ return; /* there may be a NULL confreq etc. */
+
+ TCHECK2(*tptr, 2);
len = EXTRACT_16BITS(tptr);
tptr += 2;
- if (length <= 4)
- return; /* there may be a NULL confreq etc. */
+ printf("\n\tencoded length %u (=Option(s) length %u)",len,len-4);
+
+ if (vflag>1)
+ print_unknown_data(gndo,pptr-2,"\n\t",6);
+
switch (code) {
case CPCODES_VEXT:
if (length < 11)
break;
- printf(", Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
+ TCHECK2(*tptr, 4);
+ printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
tptr += 4;
+ TCHECK2(*tptr, 3);
printf(" Vendor: %s (%u)",
tok2str(oui_values,"Unknown",EXTRACT_24BITS(tptr)),
EXTRACT_24BITS(tptr));
case PPP_IPCP:
pfunc = print_ipcp_config_options;
break;
+ case PPP_IPV6CP:
+ pfunc = print_ip6cp_config_options;
+ break;
case PPP_CCP:
pfunc = print_ccp_config_options;
break;
break;
default:
/*
- * This should never happen, but we set
- * "pfunc" to squelch uninitialized
- * variable warnings from compilers.
+ * No print routine for the options for
+ * this protocol.
*/
pfunc = NULL;
break;
}
+
+ if (pfunc == NULL) /* catch the above null pointer if unknown CP */
+ break;
+
if ((j = (*pfunc)(tptr, len)) == 0)
break;
x -= j;
case CPCODES_PROT_REJ:
if (length < 6)
break;
- printf(", Rejected %s Protocol (0x%04x)",
+ TCHECK2(*tptr, 2);
+ printf("\n\t Rejected %s Protocol (0x%04x)",
tok2str(ppptype2str,"unknown", EXTRACT_16BITS(tptr)),
EXTRACT_16BITS(tptr));
- /* XXX: need to decode Rejected-Information? */
+ /* XXX: need to decode Rejected-Information? - hexdump for now */
+ if (len > 6) {
+ printf("\n\t Rejected Packet");
+ print_unknown_data(gndo,tptr+2,"\n\t ",len-2);
+ }
break;
case CPCODES_ECHO_REQ:
case CPCODES_ECHO_RPL:
case CPCODES_DISC_REQ:
+ if (length < 8)
+ break;
+ TCHECK2(*tptr, 4);
+ printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
+ /* XXX: need to decode Data? - hexdump for now */
+ if (len > 8) {
+ printf("\n\t -----trailing data-----");
+ TCHECK2(tptr[4], len-8);
+ print_unknown_data(gndo,tptr+4,"\n\t ",len-8);
+ }
+ break;
case CPCODES_ID:
if (length < 8)
break;
- printf(", Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
- /* XXX: need to decode Data? */
+ TCHECK2(*tptr, 4);
+ printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
+ /* RFC 1661 says this is intended to be human readable */
+ if (len > 8) {
+ printf("\n\t Message\n\t ");
+ fn_printn(tptr+4,len-4,snapend);
+ }
break;
case CPCODES_TIME_REM:
if (length < 12)
break;
- printf(", Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
+ TCHECK2(*tptr, 4);
+ printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
+ TCHECK2(*(tptr + 4), 4);
printf(", Seconds-Remaining %us", EXTRACT_32BITS(tptr + 4));
/* XXX: need to decode Message? */
break;
* original pointer passed to the begin
* the PPP packet */
if (vflag <= 1)
- print_unknown_data(pptr-2,"\n\t",length+2);
+ print_unknown_data(gndo,pptr-2,"\n\t ",length+2);
break;
}
- printf(", length %u", length);
+ return;
- if (vflag >1)
- print_unknown_data(pptr-2,"\n\t",length+2);
+trunc:
+ printf("[|%s]", typestr);
}
/* LCP config options */
if (length < 2)
return 0;
+ TCHECK2(*p, 2);
len = p[1];
opt = p[0];
if (length < len)
return 0;
+ if (len < 2) {
+ if ((opt >= LCPOPT_MIN) && (opt <= LCPOPT_MAX))
+ printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)", lcpconfopts[opt],opt,len);
+ else
+ printf("\n\tunknown LCP option 0x%02x", opt);
+ return 0;
+ }
if ((opt >= LCPOPT_MIN) && (opt <= LCPOPT_MAX))
- printf(", %s (%u)", lcpconfopts[opt],opt);
+ printf("\n\t %s Option (0x%02x), length %u: ", lcpconfopts[opt],opt,len);
else {
- printf(", unknown LCP option 0x%02x", opt);
+ printf("\n\tunknown LCP option 0x%02x", opt);
return len;
}
switch (opt) {
case LCPOPT_VEXT:
if (len >= 6) {
- printf(" Vendor: %s (%u)",
+ TCHECK2(*(p + 2), 3);
+ printf("Vendor: %s (%u)",
tok2str(oui_values,"Unknown",EXTRACT_24BITS(p+2)),
EXTRACT_24BITS(p+2));
#if 0
+ TCHECK(p[5]);
printf(", kind: 0x%02x", p[5]);
printf(", Value: 0x")
for (i = 0; i < len - 6; i++) {
+ TCHECK(p[6 + i]);
printf("%02x", p[6 + i]);
}
#endif
}
break;
case LCPOPT_MRU:
- if (len == 4)
- printf(" %u", EXTRACT_16BITS(p + 2));
+ if (len == 4) {
+ TCHECK2(*(p + 2), 2);
+ printf("%u", EXTRACT_16BITS(p + 2));
+ }
break;
case LCPOPT_ACCM:
- if (len == 6)
- printf(" 0x%08x", EXTRACT_32BITS(p + 2));
+ if (len == 6) {
+ TCHECK2(*(p + 2), 4);
+ printf("0x%08x", EXTRACT_32BITS(p + 2));
+ }
break;
case LCPOPT_AP:
if (len >= 4) {
+ TCHECK2(*(p + 2), 2);
+ printf("%s", tok2str(ppptype2str,"Unknown Auth Proto (0x04x)",EXTRACT_16BITS(p+2)));
+
switch (EXTRACT_16BITS(p+2)) {
- case PPP_PAP:
- printf(" PAP");
- break;
case PPP_CHAP:
- printf(" CHAP");
- switch (p[4]) {
- default:
- printf(", unknown-algorithm-%u", p[4]);
- break;
- case AUTHALG_CHAPMD5:
- printf(", MD5");
- break;
- case AUTHALG_MSCHAP1:
- printf(", MSCHAPv1");
- break;
- case AUTHALG_MSCHAP2:
- printf(", MSCHAPv2");
- break;
- }
+ TCHECK(p[4]);
+ printf(", %s",tok2str(authalg_values,"Unknown Auth Alg %u",p[4]));
break;
+ case PPP_PAP: /* fall through */
case PPP_EAP:
- printf(" EAP");
- break;
case PPP_SPAP:
- printf(" SPAP");
- break;
case PPP_SPAP_OLD:
- printf(" Old-SPAP");
- break;
+ break;
default:
- printf("unknown");
+ print_unknown_data(gndo,p,"\n\t",len);
}
}
break;
case LCPOPT_QP:
if (len >= 4) {
+ TCHECK2(*(p + 2), 2);
if (EXTRACT_16BITS(p+2) == PPP_LQM)
printf(" LQR");
else
}
break;
case LCPOPT_MN:
- if (len == 6)
- printf(" 0x%08x", EXTRACT_32BITS(p + 2));
+ if (len == 6) {
+ TCHECK2(*(p + 2), 4);
+ printf("0x%08x", EXTRACT_32BITS(p + 2));
+ }
break;
case LCPOPT_PFC:
break;
case LCPOPT_ACFC:
break;
case LCPOPT_LD:
- if (len == 4)
- printf(" 0x%04x", EXTRACT_16BITS(p + 2));
+ if (len == 4) {
+ TCHECK2(*(p + 2), 2);
+ printf("0x%04x", EXTRACT_16BITS(p + 2));
+ }
break;
case LCPOPT_CBACK:
if (len < 3)
break;
- switch (p[2]) { /* Operation */
- case CALLBACK_AUTH:
- printf(" UserAuth");
- break;
- case CALLBACK_DSTR:
- printf(" DialString");
- break;
- case CALLBACK_LID:
- printf(" LocalID");
- break;
- case CALLBACK_E164:
- printf(" E.164");
- break;
- case CALLBACK_X500:
- printf(" X.500");
- break;
- case CALLBACK_CBCP:
- printf(" CBCP");
- break;
- default:
- printf(" unknown-operation=%u", p[2]);
- break;
- }
+ TCHECK(p[2]);
+ printf("Callback Operation %s (%u)",
+ tok2str(ppp_callback_values,"Unknown",p[2]),
+ p[2]);
break;
case LCPOPT_MLMRRU:
- if (len == 4)
- printf(" %u", EXTRACT_16BITS(p + 2));
+ if (len == 4) {
+ TCHECK2(*(p + 2), 2);
+ printf("%u", EXTRACT_16BITS(p + 2));
+ }
break;
case LCPOPT_MLED:
if (len < 3)
break;
+ TCHECK(p[2]);
switch (p[2]) { /* class */
case MEDCLASS_NULL:
- printf(" Null");
+ printf("Null");
break;
case MEDCLASS_LOCAL:
- printf(" Local"); /* XXX */
+ printf("Local"); /* XXX */
break;
case MEDCLASS_IPV4:
if (len != 7)
break;
- printf(" IPv4 %s", ipaddr_string(p + 3));
+ TCHECK2(*(p + 3), 4);
+ printf("IPv4 %s", ipaddr_string(p + 3));
break;
case MEDCLASS_MAC:
if (len != 9)
break;
- printf(" MAC %02x:%02x:%02x:%02x:%02x:%02x",
+ TCHECK(p[8]);
+ printf("MAC %02x:%02x:%02x:%02x:%02x:%02x",
p[3], p[4], p[5], p[6], p[7], p[8]);
break;
case MEDCLASS_MNB:
- printf(" Magic-Num-Block"); /* XXX */
+ printf("Magic-Num-Block"); /* XXX */
break;
case MEDCLASS_PSNDN:
- printf(" PSNDN"); /* XXX */
+ printf("PSNDN"); /* XXX */
break;
}
break;
case LCPOPT_DEP14:
case LCPOPT_DEP15:
case LCPOPT_DEP16:
- case LCPOPT_MLSSNHF:
+ case LCPOPT_MLSSNHF:
case LCPOPT_PROP:
case LCPOPT_DCEID:
case LCPOPT_MPP:
case LCPOPT_PPPMUX:
break;
#endif
+ default:
+ if(vflag<2)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2);
+ break;
}
+
+ if (vflag>1)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2); /* exclude TLV header */
+
return len;
+
+trunc:
+ printf("[|lcp]");
+ return 0;
+}
+
+/* ML-PPP*/
+static const struct tok ppp_ml_flag_values[] = {
+ { 0x80, "begin" },
+ { 0x40, "end" },
+ { 0, NULL }
+};
+
+static void
+handle_mlppp(const u_char *p, int length) {
+
+ if (!eflag)
+ printf("MLPPP, ");
+
+ printf("seq 0x%03x, Flags [%s], length %u",
+ (EXTRACT_16BITS(p))&0x0fff, /* only support 12-Bit sequence space for now */
+ bittok2str(ppp_ml_flag_values, "none", *p & 0xc0),
+ length);
+
+ return;
}
/* CHAP */
printf("[|chap]");
return;
} else if (length < 4) {
+ TCHECK(*p);
printf("[|chap 0x%02x]", *p);
return;
}
+ TCHECK(*p);
code = *p;
- if ((code >= CHAP_CODEMIN) && (code <= CHAP_CODEMAX))
- printf("%s", chapcode[code - 1]);
- else {
- printf("0x%02x", code);
- return;
- }
+ printf("CHAP, %s (0x%02x)",
+ tok2str(chapcode_values,"unknown",code),
+ code);
p++;
- printf("(%u)", *p); /* ID */
+ TCHECK(*p);
+ printf(", id %u", *p); /* ID */
p++;
+ TCHECK2(*p, 2);
len = EXTRACT_16BITS(p);
p += 2;
case CHAP_RESP:
if (length - (p - p0) < 1)
return;
+ TCHECK(*p);
val_size = *p; /* value size */
p++;
if (length - (p - p0) < val_size)
return;
printf(", Value ");
- for (i = 0; i < val_size; i++)
+ for (i = 0; i < val_size; i++) {
+ TCHECK(*p);
printf("%02x", *p++);
+ }
name_size = len - (p - p0);
printf(", Name ");
- for (i = 0; i < name_size; i++)
+ for (i = 0; i < name_size; i++) {
+ TCHECK(*p);
safeputchar(*p++);
+ }
break;
case CHAP_SUCC:
case CHAP_FAIL:
msg_size = len - (p - p0);
printf(", Msg ");
- for (i = 0; i< msg_size; i++)
+ for (i = 0; i< msg_size; i++) {
+ TCHECK(*p);
safeputchar(*p++);
+ }
break;
}
+ return;
+
+trunc:
+ printf("[|chap]");
}
/* PAP (see RFC 1334) */
printf("[|pap]");
return;
} else if (length < 4) {
+ TCHECK(*p);
printf("[|pap 0x%02x]", *p);
return;
}
+ TCHECK(*p);
code = *p;
- if ((code >= PAP_CODEMIN) && (code <= PAP_CODEMAX))
- printf("%s", papcode[code - 1]);
- else {
- printf("0x%02x", code);
- return;
- }
+ printf("PAP, %s (0x%02x)",
+ tok2str(papcode_values,"unknown",code),
+ code);
p++;
- printf("(%u)", *p); /* ID */
+ TCHECK(*p);
+ printf(", id %u", *p); /* ID */
p++;
+ TCHECK2(*p, 2);
len = EXTRACT_16BITS(p);
p += 2;
+ if ((int)len > length) {
+ printf(", length %u > packet size", len);
+ return;
+ }
+ length = len;
+ if (length < (p - p0)) {
+ printf(", length %u < PAP header length", length);
+ return;
+ }
+
switch (code) {
case PAP_AREQ:
if (length - (p - p0) < 1)
return;
+ TCHECK(*p);
peerid_len = *p; /* Peer-ID Length */
p++;
if (length - (p - p0) < peerid_len)
return;
printf(", Peer ");
- for (i = 0; i < peerid_len; i++)
+ for (i = 0; i < peerid_len; i++) {
+ TCHECK(*p);
safeputchar(*p++);
+ }
if (length - (p - p0) < 1)
return;
+ TCHECK(*p);
passwd_len = *p; /* Password Length */
p++;
if (length - (p - p0) < passwd_len)
return;
printf(", Name ");
- for (i = 0; i < passwd_len; i++)
+ for (i = 0; i < passwd_len; i++) {
+ TCHECK(*p);
safeputchar(*p++);
+ }
break;
case PAP_AACK:
case PAP_ANAK:
if (length - (p - p0) < 1)
return;
+ TCHECK(*p);
msg_len = *p; /* Msg-Length */
p++;
if (length - (p - p0) < msg_len)
return;
printf(", Msg ");
- for (i = 0; i< msg_len; i++)
+ for (i = 0; i< msg_len; i++) {
+ TCHECK(*p);
safeputchar(*p++);
+ }
break;
}
return;
+
+trunc:
+ printf("[|pap]");
}
/* BAP */
print_ipcp_config_options(const u_char *p, int length)
{
int len, opt;
+ u_int compproto, ipcomp_subopttotallen, ipcomp_subopt, ipcomp_suboptlen;
if (length < 2)
return 0;
+ TCHECK2(*p, 2);
len = p[1];
opt = p[0];
if (length < len)
return 0;
+ if (len < 2) {
+ printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)",
+ tok2str(ipcpopt_values,"unknown",opt),
+ opt,
+ len);
+ return 0;
+ }
+
+ printf("\n\t %s Option (0x%02x), length %u: ",
+ tok2str(ipcpopt_values,"unknown",opt),
+ opt,
+ len);
+
switch (opt) {
case IPCPOPT_2ADDR: /* deprecated */
if (len != 10)
goto invlen;
- printf(", IP-Addrs src %s, dst %s",
+ TCHECK2(*(p + 6), 4);
+ printf("src %s, dst %s",
ipaddr_string(p + 2),
ipaddr_string(p + 6));
break;
case IPCPOPT_IPCOMP:
if (len < 4)
goto invlen;
- printf(", IP-Comp");
- if (EXTRACT_16BITS(p + 2) == PPP_VJC) {
- printf(" VJ-Comp");
+ TCHECK2(*(p + 2), 2);
+ compproto = EXTRACT_16BITS(p+2);
+
+ printf("%s (0x%02x):",
+ tok2str(ipcpopt_compproto_values,"Unknown",compproto),
+ compproto);
+
+ switch (compproto) {
+ case PPP_VJC:
/* XXX: VJ-Comp parameters should be decoded */
- } else
- printf(" unknown-comp-proto=%04x", EXTRACT_16BITS(p + 2));
- break;
- case IPCPOPT_ADDR:
- if (len != 6)
- goto invlen;
- printf(", IP-Addr %s", ipaddr_string(p + 2));
+ break;
+ case IPCPOPT_IPCOMP_HDRCOMP:
+ if (len < IPCPOPT_IPCOMP_MINLEN)
+ goto invlen;
+
+ TCHECK2(*(p + 2), IPCPOPT_IPCOMP_MINLEN);
+ printf("\n\t TCP Space %u, non-TCP Space %u" \
+ ", maxPeriod %u, maxTime %u, maxHdr %u",
+ EXTRACT_16BITS(p+4),
+ EXTRACT_16BITS(p+6),
+ EXTRACT_16BITS(p+8),
+ EXTRACT_16BITS(p+10),
+ EXTRACT_16BITS(p+12));
+
+ /* suboptions present ? */
+ if (len > IPCPOPT_IPCOMP_MINLEN) {
+ ipcomp_subopttotallen = len - IPCPOPT_IPCOMP_MINLEN;
+ p += IPCPOPT_IPCOMP_MINLEN;
+
+ printf("\n\t Suboptions, length %u", ipcomp_subopttotallen);
+
+ while (ipcomp_subopttotallen >= 2) {
+ TCHECK2(*p, 2);
+ ipcomp_subopt = *p;
+ ipcomp_suboptlen = *(p+1);
+
+ /* sanity check */
+ if (ipcomp_subopt == 0 ||
+ ipcomp_suboptlen == 0 )
+ break;
+
+ /* XXX: just display the suboptions for now */
+ printf("\n\t\t%s Suboption #%u, length %u",
+ tok2str(ipcpopt_compproto_subopt_values,
+ "Unknown",
+ ipcomp_subopt),
+ ipcomp_subopt,
+ ipcomp_suboptlen);
+
+ ipcomp_subopttotallen -= ipcomp_suboptlen;
+ p += ipcomp_suboptlen;
+ }
+ }
+ break;
+ default:
+ break;
+ }
break;
+
+ case IPCPOPT_ADDR: /* those options share the same format - fall through */
case IPCPOPT_MOBILE4:
- if (len != 6)
- goto invlen;
- printf(", Home-Addr %s", ipaddr_string(p + 2));
- break;
case IPCPOPT_PRIDNS:
- if (len != 6)
- goto invlen;
- printf(", Pri-DNS %s", ipaddr_string(p + 2));
- break;
case IPCPOPT_PRINBNS:
- if (len != 6)
- goto invlen;
- printf(", Pri-NBNS %s", ipaddr_string(p + 2));
- break;
case IPCPOPT_SECDNS:
+ case IPCPOPT_SECNBNS:
if (len != 6)
goto invlen;
- printf(", Sec-DNS %s", ipaddr_string(p + 2));
+ TCHECK2(*(p + 2), 4);
+ printf("%s", ipaddr_string(p + 2));
break;
- case IPCPOPT_SECNBNS:
- if (len != 6)
+ default:
+ if(vflag<2)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2);
+ break;
+ }
+ if (vflag>1)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2); /* exclude TLV header */
+ return len;
+
+invlen:
+ printf(", invalid-length-%d", opt);
+ return 0;
+
+trunc:
+ printf("[|ipcp]");
+ return 0;
+}
+
+/* IP6CP config options */
+static int
+print_ip6cp_config_options(const u_char *p, int length)
+{
+ int len, opt;
+
+ if (length < 2)
+ return 0;
+ TCHECK2(*p, 2);
+ len = p[1];
+ opt = p[0];
+ if (length < len)
+ return 0;
+ if (len < 2) {
+ printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)",
+ tok2str(ip6cpopt_values,"unknown",opt),
+ opt,
+ len);
+ return 0;
+ }
+
+ printf("\n\t %s Option (0x%02x), length %u: ",
+ tok2str(ip6cpopt_values,"unknown",opt),
+ opt,
+ len);
+
+ switch (opt) {
+ case IP6CP_IFID:
+ if (len != 10)
goto invlen;
- printf(", Sec-NBNS %s", ipaddr_string(p + 2));
+ TCHECK2(*(p + 2), 8);
+ printf("%04x:%04x:%04x:%04x",
+ EXTRACT_16BITS(p + 2),
+ EXTRACT_16BITS(p + 4),
+ EXTRACT_16BITS(p + 6),
+ EXTRACT_16BITS(p + 8));
break;
default:
- printf(", unknown-%d", opt);
+ if(vflag<2)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2);
break;
}
+ if (vflag>1)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2); /* exclude TLV header */
+
return len;
invlen:
printf(", invalid-length-%d", opt);
return 0;
+
+trunc:
+ printf("[|ip6cp]");
+ return 0;
}
+
/* CCP config options */
static int
print_ccp_config_options(const u_char *p, int length)
if (length < 2)
return 0;
+ TCHECK2(*p, 2);
len = p[1];
opt = p[0];
if (length < len)
return 0;
- if ((opt >= CCPOPT_MIN) && (opt <= CCPOPT_MAX))
- printf(", %s", ccpconfopts[opt]);
-#if 0 /* XXX */
+ if (len < 2) {
+ printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)",
+ tok2str(ccpconfopts_values, "Unknown", opt),
+ opt,
+ len);
+ return 0;
+ }
+
+ printf("\n\t %s Option (0x%02x), length %u:",
+ tok2str(ccpconfopts_values, "Unknown", opt),
+ opt,
+ len);
+
switch (opt) {
+ /* fall through --> default: nothing supported yet */
case CCPOPT_OUI:
case CCPOPT_PRED1:
case CCPOPT_PRED2:
case CCPOPT_DEC:
case CCPOPT_DEFLATE:
case CCPOPT_RESV:
- break;
-
default:
- printf(", unknown-%d", opt);
+ if(vflag<2)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2);
break;
}
-#endif
+ if (vflag>1)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2); /* exclude TLV header */
+
return len;
+
+trunc:
+ printf("[|ccp]");
+ return 0;
}
/* BACP config options */
if (length < 2)
return 0;
+ TCHECK2(*p, 2);
len = p[1];
opt = p[0];
if (length < len)
return 0;
- if (opt == BACPOPT_FPEER) {
- printf(", Favored-Peer");
+ if (len < 2) {
+ printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)",
+ tok2str(bacconfopts_values, "Unknown", opt),
+ opt,
+ len);
+ return 0;
+ }
+
+ printf("\n\t %s Option (0x%02x), length %u:",
+ tok2str(bacconfopts_values, "Unknown", opt),
+ opt,
+ len);
+
+ switch (opt) {
+ case BACPOPT_FPEER:
+ TCHECK2(*(p + 2), 4);
printf(", Magic-Num 0x%08x", EXTRACT_32BITS(p + 2));
- } else {
- printf(", unknown-option-%d", opt);
+ break;
+ default:
+ if(vflag<2)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2);
+ break;
}
+ if (vflag>1)
+ print_unknown_data(gndo,&p[2],"\n\t ",len-2); /* exclude TLV header */
+
return len;
+
+trunc:
+ printf("[|bacp]");
+ return 0;
+}
+
+
+static void
+ppp_hdlc(const u_char *p, int length)
+{
+ u_char *b, *s, *t, c;
+ int i, proto;
+ const void *se;
+
+ if (length <= 0)
+ return;
+
+ b = (u_int8_t *)malloc(length);
+ if (b == NULL)
+ return;
+
+ /*
+ * Unescape all the data into a temporary, private, buffer.
+ * Do this so that we dont overwrite the original packet
+ * contents.
+ */
+ for (s = (u_char *)p, t = b, i = length; i > 0; i--) {
+ c = *s++;
+ if (c == 0x7d) {
+ if (i > 1) {
+ i--;
+ c = *s++ ^ 0x20;
+ } else
+ continue;
+ }
+ *t++ = c;
+ }
+
+ se = snapend;
+ snapend = t;
+ length = t - b;
+
+ /* now lets guess about the payload codepoint format */
+ if (length < 1)
+ goto trunc;
+ proto = *b; /* start with a one-octet codepoint guess */
+
+ switch (proto) {
+ case PPP_IP:
+ ip_print(gndo, b+1, length - 1);
+ goto cleanup;
+#ifdef INET6
+ case PPP_IPV6:
+ ip6_print(gndo, b+1, length - 1);
+ goto cleanup;
+#endif
+ default: /* no luck - try next guess */
+ break;
+ }
+
+ if (length < 2)
+ goto trunc;
+ proto = EXTRACT_16BITS(b); /* next guess - load two octets */
+
+ switch (proto) {
+ case (PPP_ADDRESS << 8 | PPP_CONTROL): /* looks like a PPP frame */
+ if (length < 4)
+ goto trunc;
+ proto = EXTRACT_16BITS(b+2); /* load the PPP proto-id */
+ handle_ppp(proto, b+4, length - 4);
+ break;
+ default: /* last guess - proto must be a PPP proto-id */
+ handle_ppp(proto, b+2, length - 2);
+ break;
+ }
+
+cleanup:
+ snapend = se;
+ free(b);
+ return;
+
+trunc:
+ snapend = se;
+ free(b);
+ printf("[|ppp]");
+ return;
}
static void
handle_ppp(u_int proto, const u_char *p, int length)
{
+ if ((proto & 0xff00) == 0x7e00) {/* is this an escape code ? */
+ ppp_hdlc(p-1, length);
+ return;
+ }
+
switch (proto) {
- case PPP_LCP:
+ case PPP_LCP: /* fall through */
case PPP_IPCP:
case PPP_OSICP:
case PPP_MPLSCP:
case PPP_BACP:
handle_ctrl_proto(proto, p, length);
break;
+ case PPP_ML:
+ handle_mlppp(p, length);
+ break;
case PPP_CHAP:
handle_chap(p, length);
break;
handle_bap(p, length);
break;
case ETHERTYPE_IP: /*XXX*/
+ case PPP_VJNC:
case PPP_IP:
- ip_print(p, length);
+ ip_print(gndo, p, length);
break;
#ifdef INET6
case ETHERTYPE_IPV6: /*XXX*/
case PPP_IPV6:
- ip6_print(p, length);
+ ip6_print(gndo, p, length);
break;
#endif
case ETHERTYPE_IPX: /*XXX*/
case PPP_MPLS_MCAST:
mpls_print(p, length);
break;
+ case PPP_COMP:
+ printf("compressed PPP data");
+ break;
default:
- printf("unknown PPP protocol (0x%04x)", proto);
- print_unknown_data(p,"\n\t",length);
- break;
+ printf("%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", proto));
+ print_unknown_data(gndo,p,"\n\t",length);
+ break;
}
}
u_int
ppp_print(register const u_char *p, u_int length)
{
- u_int proto;
+ u_int proto,ppp_header;
u_int olen = length; /* _o_riginal length */
u_int hdr_len = 0;
*/
if (length < 2)
goto trunc;
- if (*p == PPP_ADDRESS && *(p + 1) == PPP_CONTROL) {
- p += 2; /* ACFC not used */
- length -= 2;
- hdr_len += 2;
- }
+ TCHECK2(*p, 2);
+ ppp_header = EXTRACT_16BITS(p);
+
+ switch(ppp_header) {
+ case (PPP_WITHDIRECTION_IN << 8 | PPP_CONTROL):
+ if (eflag) printf("In ");
+ p += 2;
+ length -= 2;
+ hdr_len += 2;
+ break;
+ case (PPP_WITHDIRECTION_OUT << 8 | PPP_CONTROL):
+ if (eflag) printf("Out ");
+ p += 2;
+ length -= 2;
+ hdr_len += 2;
+ break;
+ case (PPP_ADDRESS << 8 | PPP_CONTROL):
+ p += 2; /* ACFC not used */
+ length -= 2;
+ hdr_len += 2;
+ break;
+
+ default:
+ break;
+ }
if (length < 2)
goto trunc;
+ TCHECK(*p);
if (*p % 2) {
proto = *p; /* PFC is used */
p++;
length--;
hdr_len++;
} else {
+ TCHECK2(*p, 2);
proto = EXTRACT_16BITS(p);
p += 2;
length -= 2;
hdrlength += 1;
} else {
/* Un-compressed protocol field */
- ptype = ntohs(*(u_int16_t *)p);
+ ptype = EXTRACT_16BITS(p);
if (eflag)
printf("%04x ", ptype);
p += 2;
&& ph->phdr_ctl == PPP_CONTROL) {
if (eflag)
printf("%02x %02x ", q[0], q[1]);
- ptype = ntohs(ph->phdr_type);
+ ptype = EXTRACT_16BITS(&ph->phdr_type);
if (eflag && (ptype == PPP_VJC || ptype == PPP_VJNC)) {
printf("%s ", tok2str(ppptype2str,
"proto-#%d", ptype));
p += hdrlength;
switch (ptype) {
case PPP_IP:
- ip_print(p, length);
+ ip_print(gndo, p, length);
break;
#ifdef INET6
case PPP_IPV6:
- ip6_print(p, length);
+ ip6_print(gndo, p, length);
break;
#endif
case PPP_MPLS_UCAST:
p += hdrlength;
switch (ptype) {
case PPP_IP:
- ip_print(p, length);
+ ip_print(gndo, p, length);
break;
#ifdef INET6
case PPP_IPV6:
- ip6_print(p, length);
+ ip6_print(gndo, p, length);
break;
#endif
case PPP_MPLS_UCAST:
break;
#ifdef INET6
case PPP_IPV6:
- ip6_print(p, length);
+ ip6_print(gndo, p, length);
break;
#endif
case PPP_MPLS_UCAST:
case PPP_MPLS_MCAST:
- mpls_print(p, length);
+ mpls_print(gndo, p, length);
break;
default:
printf("%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", ptype));
#endif /* __bsdi__ */
return (hdrlength);
}
+
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
projects / tcpdump / blobdiff