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-rw-r--r--print-ppp.c1027
1 files changed, 573 insertions, 454 deletions
diff --git a/print-ppp.c b/print-ppp.c
index ea8e00b..8917617 100644
--- a/print-ppp.c
+++ b/print-ppp.c
@@ -22,6 +22,8 @@
* complete PPP support.
*/
+/* \summary: Point to Point Protocol (PPP) printer */
+
/*
* TODO:
* o resolve XXX as much as possible
@@ -29,27 +31,20 @@
* o BAP support
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ppp.c,v 1.114 2005-12-05 11:35:58 hannes Exp $ (LBL)";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
#ifdef __bsdi__
#include <net/slcompress.h>
#include <net/if_ppp.h>
#endif
-#include <pcap.h>
-#include <stdio.h>
#include <stdlib.h>
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
#include "ppp.h"
@@ -65,7 +60,7 @@ static const char rcsid[] _U_ =
/* Protocol Codes defined in ppp.h */
-struct tok ppptype2str[] = {
+static const struct tok ppptype2str[] = {
{ PPP_IP, "IP" },
{ PPP_OSI, "OSI" },
{ PPP_NS, "NS" },
@@ -107,6 +102,7 @@ struct tok ppptype2str[] = {
{ PPP_BACP, "BACP" },
{ PPP_BAP, "BAP" },
{ PPP_MPCP, "MLPPP-CP" },
+ { PPP_CCP, "CCP" },
{ 0, NULL }
};
@@ -129,7 +125,7 @@ struct tok ppptype2str[] = {
#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"},
@@ -243,7 +239,7 @@ static const char *lcpconfopts[] = {
/* 27-254 unassigned */
#define CCPOPT_RESV 255 /* RFC1962 */
-const struct tok ccpconfopts_values[] = {
+static const struct tok ccpconfopts_values[] = {
{ CCPOPT_OUI, "OUI" },
{ CCPOPT_PRED1, "Pred-1" },
{ CCPOPT_PRED2, "Pred-2" },
@@ -266,7 +262,7 @@ const struct tok ccpconfopts_values[] = {
#define BACPOPT_FPEER 1 /* RFC2125 */
-const struct tok bacconfopts_values[] = {
+static const struct tok bacconfopts_values[] = {
{ BACPOPT_FPEER, "Favored-Peer" },
{0, NULL}
};
@@ -284,7 +280,7 @@ const struct tok bacconfopts_values[] = {
#define IPCPOPT_SECDNS 131 /* RFC1877 */
#define IPCPOPT_SECNBNS 132 /* RFC1877 */
-struct tok ipcpopt_values[] = {
+static const struct tok ipcpopt_values[] = {
{ IPCPOPT_2ADDR, "IP-Addrs" },
{ IPCPOPT_IPCOMP, "IP-Comp" },
{ IPCPOPT_ADDR, "IP-Addr" },
@@ -299,13 +295,13 @@ struct tok ipcpopt_values[] = {
#define IPCPOPT_IPCOMP_HDRCOMP 0x61 /* rfc3544 */
#define IPCPOPT_IPCOMP_MINLEN 14
-struct tok ipcpopt_compproto_values[] = {
+static const struct tok ipcpopt_compproto_values[] = {
{ PPP_VJC, "VJ-Comp" },
{ IPCPOPT_IPCOMP_HDRCOMP, "IP Header Compression" },
{ 0, NULL }
};
-struct tok ipcpopt_compproto_subopt_values[] = {
+static const struct tok ipcpopt_compproto_subopt_values[] = {
{ 1, "RTP-Compression" },
{ 2, "Enhanced RTP-Compression" },
{ 0, NULL }
@@ -314,7 +310,7 @@ struct tok ipcpopt_compproto_subopt_values[] = {
/* IP6CP Config Options */
#define IP6CP_IFID 1
-struct tok ip6cpopt_values[] = {
+static const struct tok ip6cpopt_values[] = {
{ IP6CP_IFID, "Interface-ID" },
{ 0, NULL }
};
@@ -333,7 +329,7 @@ struct tok ip6cpopt_values[] = {
#define AUTHALG_MSCHAP1 128 /* RFC2433 */
#define AUTHALG_MSCHAP2 129 /* RFC2795 */
-struct tok authalg_values[] = {
+static const struct tok authalg_values[] = {
{ AUTHALG_CHAPMD5, "MD5" },
{ AUTHALG_MSCHAP1, "MS-CHAPv1" },
{ AUTHALG_MSCHAP2, "MS-CHAPv2" },
@@ -358,7 +354,7 @@ struct tok authalg_values[] = {
#define CALLBACK_X500 4 /* X.500 distinguished name */
#define CALLBACK_CBCP 6 /* Location is determined during CBCP nego */
-struct tok ppp_callback_values[] = {
+static const struct tok ppp_callback_values[] = {
{ CALLBACK_AUTH, "UserAuth" },
{ CALLBACK_DSTR, "DialString" },
{ CALLBACK_LID, "LocalID" },
@@ -375,7 +371,7 @@ struct tok ppp_callback_values[] = {
#define CHAP_SUCC 3
#define CHAP_FAIL 4
-struct tok chapcode_values[] = {
+static const struct tok chapcode_values[] = {
{ CHAP_CHAL, "Challenge" },
{ CHAP_RESP, "Response" },
{ CHAP_SUCC, "Success" },
@@ -389,7 +385,7 @@ struct tok chapcode_values[] = {
#define PAP_AACK 2
#define PAP_ANAK 3
-struct tok papcode_values[] = {
+static const struct tok papcode_values[] = {
{ PAP_AREQ, "Auth-Req" },
{ PAP_AACK, "Auth-ACK" },
{ PAP_ANAK, "Auth-NACK" },
@@ -406,73 +402,68 @@ struct tok papcode_values[] = {
#define BAP_CSIND 7
#define BAP_CSRES 8
-static void handle_ctrl_proto (u_int proto,const u_char *p, int length);
-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);
+static int print_lcp_config_options(netdissect_options *, const u_char *p, int);
+static int print_ipcp_config_options(netdissect_options *, const u_char *p, int);
+static int print_ip6cp_config_options(netdissect_options *, const u_char *p, int);
+static int print_ccp_config_options(netdissect_options *, const u_char *p, int);
+static int print_bacp_config_options(netdissect_options *, const u_char *p, int);
+static void handle_ppp(netdissect_options *, u_int proto, 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)
+handle_ctrl_proto(netdissect_options *ndo,
+ u_int proto, const u_char *pptr, int length)
{
const char *typestr;
u_int code, len;
- int (*pfunc)(const u_char *, int);
+ int (*pfunc)(netdissect_options *, const u_char *, int);
int x, j;
const u_char *tptr;
tptr=pptr;
typestr = tok2str(ppptype2str, "unknown ctrl-proto (0x%04x)", proto);
- printf("%s, ",typestr);
+ ND_PRINT((ndo, "%s, ", typestr));
if (length < 4) /* FIXME weak boundary checking */
goto trunc;
- TCHECK2(*tptr, 2);
+ ND_TCHECK2(*tptr, 2);
code = *tptr++;
-
- printf("%s (0x%02x), id %u, length %u",
- tok2str(cpcodes, "Unknown Opcode",code),
- code,
- *tptr++, /* ID */
- length+2);
-
- if (!vflag)
- return;
+
+ ND_PRINT((ndo, "%s (0x%02x), id %u, length %u",
+ tok2str(cpcodes, "Unknown Opcode",code),
+ code,
+ *tptr++, /* ID */
+ length + 2));
+
+ if (!ndo->ndo_vflag)
+ return;
if (length <= 4)
return; /* there may be a NULL confreq etc. */
- TCHECK2(*tptr, 2);
+ ND_TCHECK2(*tptr, 2);
len = EXTRACT_16BITS(tptr);
tptr += 2;
- printf("\n\tencoded length %u (=Option(s) length %u)",len,len-4);
+ ND_PRINT((ndo, "\n\tencoded length %u (=Option(s) length %u)", len, len - 4));
- if (vflag>1)
- print_unknown_data(pptr-2,"\n\t",6);
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo, pptr - 2, "\n\t", 6);
switch (code) {
case CPCODES_VEXT:
if (length < 11)
break;
- TCHECK2(*tptr, 4);
- printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
+ ND_TCHECK2(*tptr, 4);
+ ND_PRINT((ndo, "\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr)));
tptr += 4;
- TCHECK2(*tptr, 3);
- printf(" Vendor: %s (%u)",
+ ND_TCHECK2(*tptr, 3);
+ ND_PRINT((ndo, " Vendor: %s (%u)",
tok2str(oui_values,"Unknown",EXTRACT_24BITS(tptr)),
- EXTRACT_24BITS(tptr));
+ EXTRACT_24BITS(tptr)));
/* XXX: need to decode Kind and Value(s)? */
break;
case CPCODES_CONF_REQ:
@@ -508,8 +499,8 @@ handle_ctrl_proto(u_int proto, const u_char *pptr, int length)
if (pfunc == NULL) /* catch the above null pointer if unknown CP */
break;
-
- if ((j = (*pfunc)(tptr, len)) == 0)
+
+ if ((j = (*pfunc)(ndo, tptr, len)) == 0)
break;
x -= j;
tptr += j;
@@ -526,209 +517,239 @@ handle_ctrl_proto(u_int proto, const u_char *pptr, int length)
case CPCODES_PROT_REJ:
if (length < 6)
break;
- TCHECK2(*tptr, 2);
- printf("\n\t Rejected %s Protocol (0x%04x)",
+ ND_TCHECK2(*tptr, 2);
+ ND_PRINT((ndo, "\n\t Rejected %s Protocol (0x%04x)",
tok2str(ppptype2str,"unknown", EXTRACT_16BITS(tptr)),
- EXTRACT_16BITS(tptr));
+ EXTRACT_16BITS(tptr)));
/* XXX: need to decode Rejected-Information? - hexdump for now */
- if (len > 6) {
- printf("\n\t Rejected Packet");
- print_unknown_data(tptr+2,"\n\t ",len-2);
- }
+ if (len > 6) {
+ ND_PRINT((ndo, "\n\t Rejected Packet"));
+ print_unknown_data(ndo, 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));
+ ND_TCHECK2(*tptr, 4);
+ ND_PRINT((ndo, "\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(tptr+4,"\n\t ",len-8);
- }
+ if (len > 8) {
+ ND_PRINT((ndo, "\n\t -----trailing data-----"));
+ ND_TCHECK2(tptr[4], len - 8);
+ print_unknown_data(ndo, tptr + 4, "\n\t ", len - 8);
+ }
break;
case CPCODES_ID:
if (length < 8)
break;
- TCHECK2(*tptr, 4);
- printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
+ ND_TCHECK2(*tptr, 4);
+ ND_PRINT((ndo, "\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);
- }
+ if (len > 8) {
+ ND_PRINT((ndo, "\n\t Message\n\t "));
+ if (fn_printn(ndo, tptr + 4, len - 4, ndo->ndo_snapend))
+ goto trunc;
+ }
break;
case CPCODES_TIME_REM:
if (length < 12)
break;
- 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));
+ ND_TCHECK2(*tptr, 4);
+ ND_PRINT((ndo, "\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr)));
+ ND_TCHECK2(*(tptr + 4), 4);
+ ND_PRINT((ndo, ", Seconds-Remaining %us", EXTRACT_32BITS(tptr + 4)));
/* XXX: need to decode Message? */
break;
default:
- /* XXX this is dirty but we do not get the
- * original pointer passed to the begin
- * the PPP packet */
- if (vflag <= 1)
- print_unknown_data(pptr-2,"\n\t ",length+2);
+ /* XXX this is dirty but we do not get the
+ * original pointer passed to the begin
+ * the PPP packet */
+ if (ndo->ndo_vflag <= 1)
+ print_unknown_data(ndo, pptr - 2, "\n\t ", length + 2);
break;
}
return;
trunc:
- printf("[|%s]", typestr);
+ ND_PRINT((ndo, "[|%s]", typestr));
}
/* LCP config options */
static int
-print_lcp_config_options(const u_char *p, int length)
+print_lcp_config_options(netdissect_options *ndo,
+ const u_char *p, int length)
{
int len, opt;
if (length < 2)
return 0;
- TCHECK2(*p, 2);
+ ND_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);
+ ND_PRINT((ndo, "\n\t %s Option (0x%02x), length %u (length bogus, should be >= 2)",
+ lcpconfopts[opt], opt, len));
else
- printf("\n\tunknown LCP option 0x%02x", opt);
+ ND_PRINT((ndo, "\n\tunknown LCP option 0x%02x", opt));
return 0;
}
if ((opt >= LCPOPT_MIN) && (opt <= LCPOPT_MAX))
- printf("\n\t %s Option (0x%02x), length %u: ", lcpconfopts[opt],opt,len);
+ ND_PRINT((ndo, "\n\t %s Option (0x%02x), length %u", lcpconfopts[opt], opt, len));
else {
- printf("\n\tunknown LCP option 0x%02x", opt);
+ ND_PRINT((ndo, "\n\tunknown LCP option 0x%02x", opt));
return len;
}
switch (opt) {
case LCPOPT_VEXT:
- if (len >= 6) {
- TCHECK2(*(p + 2), 3);
- printf("Vendor: %s (%u)",
- tok2str(oui_values,"Unknown",EXTRACT_24BITS(p+2)),
- EXTRACT_24BITS(p+2));
+ if (len < 6) {
+ ND_PRINT((ndo, " (length bogus, should be >= 6)"));
+ return len;
+ }
+ ND_TCHECK_24BITS(p + 2);
+ ND_PRINT((ndo, ": 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
+ ND_TCHECK(p[5]);
+ ND_PRINT((ndo, ", kind: 0x%02x", p[5]));
+ ND_PRINT((ndo, ", Value: 0x"));
+ for (i = 0; i < len - 6; i++) {
+ ND_TCHECK(p[6 + i]);
+ ND_PRINT((ndo, "%02x", p[6 + i]));
}
+#endif
break;
case LCPOPT_MRU:
- if (len == 4) {
- TCHECK2(*(p + 2), 2);
- printf("%u", EXTRACT_16BITS(p + 2));
+ if (len != 4) {
+ ND_PRINT((ndo, " (length bogus, should be = 4)"));
+ return len;
}
+ ND_TCHECK_16BITS(p + 2);
+ ND_PRINT((ndo, ": %u", EXTRACT_16BITS(p + 2)));
break;
case LCPOPT_ACCM:
- if (len == 6) {
- TCHECK2(*(p + 2), 4);
- printf("0x%08x", EXTRACT_32BITS(p + 2));
+ if (len != 6) {
+ ND_PRINT((ndo, " (length bogus, should be = 6)"));
+ return len;
}
+ ND_TCHECK_32BITS(p + 2);
+ ND_PRINT((ndo, ": 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_CHAP:
- TCHECK(p[4]);
- printf(", %s",tok2str(authalg_values,"Unknown Auth Alg %u",p[4]));
+ if (len < 4) {
+ ND_PRINT((ndo, " (length bogus, should be >= 4)"));
+ return len;
+ }
+ ND_TCHECK_16BITS(p + 2);
+ ND_PRINT((ndo, ": %s", tok2str(ppptype2str, "Unknown Auth Proto (0x04x)", EXTRACT_16BITS(p + 2))));
+
+ switch (EXTRACT_16BITS(p+2)) {
+ case PPP_CHAP:
+ ND_TCHECK(p[4]);
+ ND_PRINT((ndo, ", %s", tok2str(authalg_values, "Unknown Auth Alg %u", p[4])));
break;
- case PPP_PAP: /* fall through */
- case PPP_EAP:
- case PPP_SPAP:
- case PPP_SPAP_OLD:
+ case PPP_PAP: /* fall through */
+ case PPP_EAP:
+ case PPP_SPAP:
+ case PPP_SPAP_OLD:
break;
- default:
- print_unknown_data(p,"\n\t",len);
- }
+ default:
+ print_unknown_data(ndo, 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
- printf(" unknown");
+ if (len < 4) {
+ ND_PRINT((ndo, " (length bogus, should be >= 4)"));
+ return 0;
}
+ ND_TCHECK_16BITS(p+2);
+ if (EXTRACT_16BITS(p+2) == PPP_LQM)
+ ND_PRINT((ndo, ": LQR"));
+ else
+ ND_PRINT((ndo, ": unknown"));
break;
case LCPOPT_MN:
- if (len == 6) {
- TCHECK2(*(p + 2), 4);
- printf("0x%08x", EXTRACT_32BITS(p + 2));
+ if (len != 6) {
+ ND_PRINT((ndo, " (length bogus, should be = 6)"));
+ return 0;
}
+ ND_TCHECK_32BITS(p + 2);
+ ND_PRINT((ndo, ": 0x%08x", EXTRACT_32BITS(p + 2)));
break;
case LCPOPT_PFC:
break;
case LCPOPT_ACFC:
break;
case LCPOPT_LD:
- if (len == 4) {
- TCHECK2(*(p + 2), 2);
- printf("0x%04x", EXTRACT_16BITS(p + 2));
+ if (len != 4) {
+ ND_PRINT((ndo, " (length bogus, should be = 4)"));
+ return 0;
}
+ ND_TCHECK_16BITS(p + 2);
+ ND_PRINT((ndo, ": 0x%04x", EXTRACT_16BITS(p + 2)));
break;
case LCPOPT_CBACK:
- if (len < 3)
- break;
- TCHECK(p[2]);
- printf("Callback Operation %s (%u)",
- tok2str(ppp_callback_values,"Unknown",p[2]),
- p[2]);
+ if (len < 3) {
+ ND_PRINT((ndo, " (length bogus, should be >= 3)"));
+ return 0;
+ }
+ ND_PRINT((ndo, ": "));
+ ND_TCHECK(p[2]);
+ ND_PRINT((ndo, ": Callback Operation %s (%u)",
+ tok2str(ppp_callback_values, "Unknown", p[2]),
+ p[2]));
break;
case LCPOPT_MLMRRU:
- if (len == 4) {
- TCHECK2(*(p + 2), 2);
- printf("%u", EXTRACT_16BITS(p + 2));
+ if (len != 4) {
+ ND_PRINT((ndo, " (length bogus, should be = 4)"));
+ return 0;
}
+ ND_TCHECK_16BITS(p + 2);
+ ND_PRINT((ndo, ": %u", EXTRACT_16BITS(p + 2)));
break;
case LCPOPT_MLED:
- if (len < 3)
- break;
- TCHECK(p[2]);
+ if (len < 3) {
+ ND_PRINT((ndo, " (length bogus, should be >= 3)"));
+ return 0;
+ }
+ ND_TCHECK(p[2]);
switch (p[2]) { /* class */
case MEDCLASS_NULL:
- printf("Null");
+ ND_PRINT((ndo, ": Null"));
break;
case MEDCLASS_LOCAL:
- printf("Local"); /* XXX */
+ ND_PRINT((ndo, ": Local")); /* XXX */
break;
case MEDCLASS_IPV4:
- if (len != 7)
- break;
- TCHECK2(*(p + 3), 4);
- printf("IPv4 %s", ipaddr_string(p + 3));
+ if (len != 7) {
+ ND_PRINT((ndo, " (length bogus, should be = 7)"));
+ return 0;
+ }
+ ND_TCHECK2(*(p + 3), 4);
+ ND_PRINT((ndo, ": IPv4 %s", ipaddr_string(ndo, p + 3)));
break;
case MEDCLASS_MAC:
- if (len != 9)
- break;
- TCHECK(p[8]);
- printf("MAC %02x:%02x:%02x:%02x:%02x:%02x",
- p[3], p[4], p[5], p[6], p[7], p[8]);
+ if (len != 9) {
+ ND_PRINT((ndo, " (length bogus, should be = 9)"));
+ return 0;
+ }
+ ND_TCHECK2(*(p + 3), 6);
+ ND_PRINT((ndo, ": MAC %s", etheraddr_string(ndo, p + 3)));
break;
case MEDCLASS_MNB:
- printf("Magic-Num-Block"); /* XXX */
+ ND_PRINT((ndo, ": Magic-Num-Block")); /* XXX */
break;
case MEDCLASS_PSNDN:
- printf("PSNDN"); /* XXX */
+ ND_PRINT((ndo, ": PSNDN")); /* XXX */
+ break;
+ default:
+ ND_PRINT((ndo, ": Unknown class %u", p[2]));
break;
}
break;
@@ -756,46 +777,59 @@ print_lcp_config_options(const u_char *p, int length)
case LCPOPT_PPPMUX:
break;
#endif
- default:
- if(vflag<2)
- print_unknown_data(&p[2],"\n\t ",len-2);
- break;
+ default:
+ /*
+ * Unknown option; dump it as raw bytes now if we're
+ * not going to do so below.
+ */
+ if (ndo->ndo_vflag < 2)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2);
+ break;
}
-
- if (vflag>1)
- print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */
+
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2); /* exclude TLV header */
return len;
trunc:
- printf("[|lcp]");
+ ND_PRINT((ndo, "[|lcp]"));
return 0;
}
/* ML-PPP*/
-struct tok ppp_ml_flag_values[] = {
+static const struct tok ppp_ml_flag_values[] = {
{ 0x80, "begin" },
{ 0x40, "end" },
{ 0, NULL }
};
static void
-handle_mlppp(const u_char *p, int length) {
+handle_mlppp(netdissect_options *ndo,
+ const u_char *p, int length)
+{
+ if (!ndo->ndo_eflag)
+ ND_PRINT((ndo, "MLPPP, "));
- if (!eflag)
- printf("MLPPP, ");
+ if (length < 2) {
+ ND_PRINT((ndo, "[|mlppp]"));
+ return;
+ }
+ if (!ND_TTEST_16BITS(p)) {
+ ND_PRINT((ndo, "[|mlppp]"));
+ return;
+ }
- printf("seq 0x%03x, Flags [%s], length %u",
+ ND_PRINT((ndo, "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;
+ length));
}
/* CHAP */
static void
-handle_chap(const u_char *p, int length)
+handle_chap(netdissect_options *ndo,
+ const u_char *p, int length)
{
u_int code, len;
int val_size, name_size, msg_size;
@@ -804,26 +838,26 @@ handle_chap(const u_char *p, int length)
p0 = p;
if (length < 1) {
- printf("[|chap]");
+ ND_PRINT((ndo, "[|chap]"));
return;
} else if (length < 4) {
- TCHECK(*p);
- printf("[|chap 0x%02x]", *p);
+ ND_TCHECK(*p);
+ ND_PRINT((ndo, "[|chap 0x%02x]", *p));
return;
}
- TCHECK(*p);
+ ND_TCHECK(*p);
code = *p;
- printf("CHAP, %s (0x%02x)",
+ ND_PRINT((ndo, "CHAP, %s (0x%02x)",
tok2str(chapcode_values,"unknown",code),
- code);
+ code));
p++;
- TCHECK(*p);
- printf(", id %u", *p); /* ID */
+ ND_TCHECK(*p);
+ ND_PRINT((ndo, ", id %u", *p)); /* ID */
p++;
- TCHECK2(*p, 2);
+ ND_TCHECK2(*p, 2);
len = EXTRACT_16BITS(p);
p += 2;
@@ -839,42 +873,43 @@ handle_chap(const u_char *p, int length)
case CHAP_RESP:
if (length - (p - p0) < 1)
return;
- TCHECK(*p);
+ ND_TCHECK(*p);
val_size = *p; /* value size */
p++;
if (length - (p - p0) < val_size)
return;
- printf(", Value ");
+ ND_PRINT((ndo, ", Value "));
for (i = 0; i < val_size; i++) {
- TCHECK(*p);
- printf("%02x", *p++);
+ ND_TCHECK(*p);
+ ND_PRINT((ndo, "%02x", *p++));
}
name_size = len - (p - p0);
- printf(", Name ");
+ ND_PRINT((ndo, ", Name "));
for (i = 0; i < name_size; i++) {
- TCHECK(*p);
- safeputchar(*p++);
+ ND_TCHECK(*p);
+ safeputchar(ndo, *p++);
}
break;
case CHAP_SUCC:
case CHAP_FAIL:
msg_size = len - (p - p0);
- printf(", Msg ");
+ ND_PRINT((ndo, ", Msg "));
for (i = 0; i< msg_size; i++) {
- TCHECK(*p);
- safeputchar(*p++);
+ ND_TCHECK(*p);
+ safeputchar(ndo, *p++);
}
break;
}
return;
trunc:
- printf("[|chap]");
+ ND_PRINT((ndo, "[|chap]"));
}
/* PAP (see RFC 1334) */
static void
-handle_pap(const u_char *p, int length)
+handle_pap(netdissect_options *ndo,
+ const u_char *p, int length)
{
u_int code, len;
int peerid_len, passwd_len, msg_len;
@@ -883,92 +918,103 @@ handle_pap(const u_char *p, int length)
p0 = p;
if (length < 1) {
- printf("[|pap]");
+ ND_PRINT((ndo, "[|pap]"));
return;
} else if (length < 4) {
- TCHECK(*p);
- printf("[|pap 0x%02x]", *p);
+ ND_TCHECK(*p);
+ ND_PRINT((ndo, "[|pap 0x%02x]", *p));
return;
}
- TCHECK(*p);
+ ND_TCHECK(*p);
code = *p;
- printf("PAP, %s (0x%02x)",
- tok2str(papcode_values,"unknown",code),
- code);
+ ND_PRINT((ndo, "PAP, %s (0x%02x)",
+ tok2str(papcode_values, "unknown", code),
+ code));
p++;
- TCHECK(*p);
- printf(", id %u", *p); /* ID */
+ ND_TCHECK(*p);
+ ND_PRINT((ndo, ", id %u", *p)); /* ID */
p++;
- TCHECK2(*p, 2);
+ ND_TCHECK2(*p, 2);
len = EXTRACT_16BITS(p);
p += 2;
if ((int)len > length) {
- printf(", length %u > packet size", len);
+ ND_PRINT((ndo, ", length %u > packet size", len));
return;
}
length = len;
if (length < (p - p0)) {
- printf(", length %u < PAP header length", length);
+ ND_PRINT((ndo, ", length %u < PAP header length", length));
return;
}
switch (code) {
case PAP_AREQ:
+ /* A valid Authenticate-Request is 6 or more octets long. */
+ if (len < 6)
+ goto trunc;
if (length - (p - p0) < 1)
return;
- TCHECK(*p);
+ ND_TCHECK(*p);
peerid_len = *p; /* Peer-ID Length */
p++;
if (length - (p - p0) < peerid_len)
return;
- printf(", Peer ");
+ ND_PRINT((ndo, ", Peer "));
for (i = 0; i < peerid_len; i++) {
- TCHECK(*p);
- safeputchar(*p++);
+ ND_TCHECK(*p);
+ safeputchar(ndo, *p++);
}
if (length - (p - p0) < 1)
return;
- TCHECK(*p);
+ ND_TCHECK(*p);
passwd_len = *p; /* Password Length */
p++;
if (length - (p - p0) < passwd_len)
return;
- printf(", Name ");
+ ND_PRINT((ndo, ", Name "));
for (i = 0; i < passwd_len; i++) {
- TCHECK(*p);
- safeputchar(*p++);
+ ND_TCHECK(*p);
+ safeputchar(ndo, *p++);
}
break;
case PAP_AACK:
case PAP_ANAK:
+ /* Although some implementations ignore truncation at
+ * this point and at least one generates a truncated
+ * packet, RFC 1334 section 2.2.2 clearly states that
+ * both AACK and ANAK are at least 5 bytes long.
+ */
+ if (len < 5)
+ goto trunc;
if (length - (p - p0) < 1)
return;
- TCHECK(*p);
+ ND_TCHECK(*p);
msg_len = *p; /* Msg-Length */
p++;
if (length - (p - p0) < msg_len)
return;
- printf(", Msg ");
+ ND_PRINT((ndo, ", Msg "));
for (i = 0; i< msg_len; i++) {
- TCHECK(*p);
- safeputchar(*p++);
+ ND_TCHECK(*p);
+ safeputchar(ndo, *p++);
}
break;
}
return;
trunc:
- printf("[|pap]");
+ ND_PRINT((ndo, "[|pap]"));
}
/* BAP */
static void
-handle_bap(const u_char *p _U_, int length _U_)
+handle_bap(netdissect_options *ndo _U_,
+ const u_char *p _U_, int length _U_)
{
/* XXX: to be supported!! */
}
@@ -976,91 +1022,99 @@ handle_bap(const u_char *p _U_, int length _U_)
/* IPCP config options */
static int
-print_ipcp_config_options(const u_char *p, int length)
+print_ipcp_config_options(netdissect_options *ndo,
+ 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);
+ ND_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)",
+ ND_PRINT((ndo, "\n\t %s Option (0x%02x), length %u (length bogus, should be >= 2)",
tok2str(ipcpopt_values,"unknown",opt),
opt,
- len);
+ len));
return 0;
}
- printf("\n\t %s Option (0x%02x), length %u: ",
+ ND_PRINT((ndo, "\n\t %s Option (0x%02x), length %u",
tok2str(ipcpopt_values,"unknown",opt),
opt,
- len);
+ len));
switch (opt) {
case IPCPOPT_2ADDR: /* deprecated */
- if (len != 10)
- goto invlen;
- TCHECK2(*(p + 6), 4);
- printf("src %s, dst %s",
- ipaddr_string(p + 2),
- ipaddr_string(p + 6));
+ if (len != 10) {
+ ND_PRINT((ndo, " (length bogus, should be = 10)"));
+ return len;
+ }
+ ND_TCHECK2(*(p + 6), 4);
+ ND_PRINT((ndo, ": src %s, dst %s",
+ ipaddr_string(ndo, p + 2),
+ ipaddr_string(ndo, p + 6)));
break;
case IPCPOPT_IPCOMP:
- if (len < 4)
- goto invlen;
- TCHECK2(*(p + 2), 2);
- compproto = EXTRACT_16BITS(p+2);
+ if (len < 4) {
+ ND_PRINT((ndo, " (length bogus, should be >= 4)"));
+ return 0;
+ }
+ ND_TCHECK_16BITS(p+2);
+ compproto = EXTRACT_16BITS(p+2);
- printf("%s (0x%02x):",
- tok2str(ipcpopt_compproto_values,"Unknown",compproto),
- compproto);
+ ND_PRINT((ndo, ": %s (0x%02x):",
+ tok2str(ipcpopt_compproto_values, "Unknown", compproto),
+ compproto));
switch (compproto) {
case PPP_VJC:
/* XXX: VJ-Comp parameters should be decoded */
break;
case IPCPOPT_IPCOMP_HDRCOMP:
- if (len < IPCPOPT_IPCOMP_MINLEN)
- goto invlen;
+ if (len < IPCPOPT_IPCOMP_MINLEN) {
+ ND_PRINT((ndo, " (length bogus, should be >= %u)",
+ IPCPOPT_IPCOMP_MINLEN));
+ return 0;
+ }
- TCHECK2(*(p + 2), IPCPOPT_IPCOMP_MINLEN);
- printf("\n\t TCP Space %u, non-TCP Space %u" \
+ ND_TCHECK2(*(p + 2), IPCPOPT_IPCOMP_MINLEN);
+ ND_PRINT((ndo, "\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));
+ 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);
+
+ ND_PRINT((ndo, "\n\t Suboptions, length %u", ipcomp_subopttotallen));
while (ipcomp_subopttotallen >= 2) {
- TCHECK2(*p, 2);
+ ND_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",
+ ND_PRINT((ndo, "\n\t\t%s Suboption #%u, length %u",
tok2str(ipcpopt_compproto_subopt_values,
"Unknown",
ipcomp_subopt),
ipcomp_subopt,
- ipcomp_suboptlen);
+ ipcomp_suboptlen));
ipcomp_subopttotallen -= ipcomp_suboptlen;
p += ipcomp_suboptlen;
@@ -1078,114 +1132,153 @@ print_ipcp_config_options(const u_char *p, int length)
case IPCPOPT_PRINBNS:
case IPCPOPT_SECDNS:
case IPCPOPT_SECNBNS:
- if (len != 6)
- goto invlen;
- TCHECK2(*(p + 2), 4);
- printf("%s", ipaddr_string(p + 2));
+ if (len != 6) {
+ ND_PRINT((ndo, " (length bogus, should be = 6)"));
+ return 0;
+ }
+ ND_TCHECK2(*(p + 2), 4);
+ ND_PRINT((ndo, ": %s", ipaddr_string(ndo, p + 2)));
break;
default:
- if(vflag<2)
- print_unknown_data(&p[2],"\n\t ",len-2);
+ /*
+ * Unknown option; dump it as raw bytes now if we're
+ * not going to do so below.
+ */
+ if (ndo->ndo_vflag < 2)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2);
break;
}
- if (vflag>1)
- print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2); /* exclude TLV header */
return len;
-invlen:
- printf(", invalid-length-%d", opt);
- return 0;
-
trunc:
- printf("[|ipcp]");
+ ND_PRINT((ndo, "[|ipcp]"));
return 0;
}
/* IP6CP config options */
static int
-print_ip6cp_config_options(const u_char *p, int length)
+print_ip6cp_config_options(netdissect_options *ndo,
+ const u_char *p, int length)
{
int len, opt;
if (length < 2)
return 0;
- TCHECK2(*p, 2);
+ ND_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)",
+ ND_PRINT((ndo, "\n\t %s Option (0x%02x), length %u (length bogus, should be >= 2)",
tok2str(ip6cpopt_values,"unknown",opt),
opt,
- len);
- return 0;
+ len));
+ return 0;
}
- printf("\n\t %s Option (0x%02x), length %u: ",
+ ND_PRINT((ndo, "\n\t %s Option (0x%02x), length %u",
tok2str(ip6cpopt_values,"unknown",opt),
opt,
- len);
+ len));
switch (opt) {
case IP6CP_IFID:
- if (len != 10)
- goto invlen;
- TCHECK2(*(p + 2), 8);
- printf("%04x:%04x:%04x:%04x",
+ if (len != 10) {
+ ND_PRINT((ndo, " (length bogus, should be = 10)"));
+ return len;
+ }
+ ND_TCHECK2(*(p + 2), 8);
+ ND_PRINT((ndo, ": %04x:%04x:%04x:%04x",
EXTRACT_16BITS(p + 2),
EXTRACT_16BITS(p + 4),
EXTRACT_16BITS(p + 6),
- EXTRACT_16BITS(p + 8));
+ EXTRACT_16BITS(p + 8)));
break;
default:
- if(vflag<2)
- print_unknown_data(&p[2],"\n\t ",len-2);
+ /*
+ * Unknown option; dump it as raw bytes now if we're
+ * not going to do so below.
+ */
+ if (ndo->ndo_vflag < 2)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2);
break;
}
- if (vflag>1)
- print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2); /* exclude TLV header */
return len;
-invlen:
- printf(", invalid-length-%d", opt);
- return 0;
-
trunc:
- printf("[|ip6cp]");
+ ND_PRINT((ndo, "[|ip6cp]"));
return 0;
}
/* CCP config options */
static int
-print_ccp_config_options(const u_char *p, int length)
+print_ccp_config_options(netdissect_options *ndo,
+ const u_char *p, int length)
{
int len, opt;
if (length < 2)
return 0;
- TCHECK2(*p, 2);
+ ND_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(ccpconfopts_values, "Unknown", opt),
- opt,
- len);
- return 0;
- }
+ ND_PRINT((ndo, "\n\t %s Option (0x%02x), length %u (length 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);
+ ND_PRINT((ndo, "\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_BSDCOMP:
+ if (len < 3) {
+ ND_PRINT((ndo, " (length bogus, should be >= 3)"));
+ return len;
+ }
+ ND_TCHECK(p[2]);
+ ND_PRINT((ndo, ": Version: %u, Dictionary Bits: %u",
+ p[2] >> 5, p[2] & 0x1f));
+ break;
+ case CCPOPT_MVRCA:
+ if (len < 4) {
+ ND_PRINT((ndo, " (length bogus, should be >= 4)"));
+ return len;
+ }
+ ND_TCHECK(p[3]);
+ ND_PRINT((ndo, ": Features: %u, PxP: %s, History: %u, #CTX-ID: %u",
+ (p[2] & 0xc0) >> 6,
+ (p[2] & 0x20) ? "Enabled" : "Disabled",
+ p[2] & 0x1f, p[3]));
+ break;
+ case CCPOPT_DEFLATE:
+ if (len < 4) {
+ ND_PRINT((ndo, " (length bogus, should be >= 4)"));
+ return len;
+ }
+ ND_TCHECK(p[3]);
+ ND_PRINT((ndo, ": Window: %uK, Method: %s (0x%x), MBZ: %u, CHK: %u",
+ (p[2] & 0xf0) >> 4,
+ ((p[2] & 0x0f) == 8) ? "zlib" : "unknown",
+ p[2] & 0x0f, (p[3] & 0xfc) >> 2, p[3] & 0x03));
+ break;
+
+/* XXX: to be supported */
+#if 0
case CCPOPT_OUI:
case CCPOPT_PRED1:
case CCPOPT_PRED2:
@@ -1195,82 +1288,98 @@ print_ccp_config_options(const u_char *p, int length)
case CCPOPT_MPPC:
case CCPOPT_GFZA:
case CCPOPT_V42BIS:
- case CCPOPT_BSDCOMP:
case CCPOPT_LZSDCP:
- case CCPOPT_MVRCA:
case CCPOPT_DEC:
- case CCPOPT_DEFLATE:
case CCPOPT_RESV:
+ break;
+#endif
default:
- if(vflag<2)
- print_unknown_data(&p[2],"\n\t ",len-2);
+ /*
+ * Unknown option; dump it as raw bytes now if we're
+ * not going to do so below.
+ */
+ if (ndo->ndo_vflag < 2)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2);
break;
}
- if (vflag>1)
- print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2); /* exclude TLV header */
return len;
trunc:
- printf("[|ccp]");
+ ND_PRINT((ndo, "[|ccp]"));
return 0;
}
/* BACP config options */
static int
-print_bacp_config_options(const u_char *p, int length)
+print_bacp_config_options(netdissect_options *ndo,
+ const u_char *p, int length)
{
int len, opt;
if (length < 2)
return 0;
- TCHECK2(*p, 2);
+ ND_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(bacconfopts_values, "Unknown", opt),
- opt,
- len);
- return 0;
- }
+ ND_PRINT((ndo, "\n\t %s Option (0x%02x), length %u (length 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);
+ ND_PRINT((ndo, "\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));
- break;
+ if (len != 6) {
+ ND_PRINT((ndo, " (length bogus, should be = 6)"));
+ return len;
+ }
+ ND_TCHECK_32BITS(p + 2);
+ ND_PRINT((ndo, ": Magic-Num 0x%08x", EXTRACT_32BITS(p + 2)));
+ break;
default:
- if(vflag<2)
- print_unknown_data(&p[2],"\n\t ",len-2);
+ /*
+ * Unknown option; dump it as raw bytes now if we're
+ * not going to do so below.
+ */
+ if (ndo->ndo_vflag < 2)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2);
break;
}
- if (vflag>1)
- print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo, &p[2], "\n\t ", len - 2); /* exclude TLV header */
return len;
trunc:
- printf("[|bacp]");
+ ND_PRINT((ndo, "[|bacp]"));
return 0;
}
-
static void
-ppp_hdlc(const u_char *p, int length)
+ppp_hdlc(netdissect_options *ndo,
+ const u_char *p, int length)
{
- u_char *b, *s, *t, c;
+ u_char *b, *t, c;
+ const u_char *s;
int i, proto;
const void *se;
- b = (u_int8_t *)malloc(length);
+ if (length <= 0)
+ return;
+
+ b = (u_char *)malloc(length);
if (b == NULL)
return;
@@ -1279,64 +1388,74 @@ ppp_hdlc(const u_char *p, int length)
* Do this so that we dont overwrite the original packet
* contents.
*/
- for (s = (u_char *)p, t = b, i = length; i > 0; i--) {
+ for (s = p, t = b, i = length; i > 0 && ND_TTEST(*s); i--) {
c = *s++;
if (c == 0x7d) {
- if (i > 1) {
- i--;
- c = *s++ ^ 0x20;
- } else
- continue;
+ if (i <= 1 || !ND_TTEST(*s))
+ break;
+ i--;
+ c = *s++ ^ 0x20;
}
*t++ = c;
}
- se = snapend;
- snapend = t;
+ se = ndo->ndo_snapend;
+ ndo->ndo_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, t - b - 1);
+ ip_print(ndo, b + 1, length - 1);
goto cleanup;
-#ifdef INET6
case PPP_IPV6:
- ip6_print(gndo, b+1, t - b - 1);
+ ip6_print(ndo, 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, t - b - 4);
+ handle_ppp(ndo, proto, b + 4, length - 4);
break;
default: /* last guess - proto must be a PPP proto-id */
- handle_ppp(proto, b+2, t - b - 2);
+ handle_ppp(ndo, proto, b + 2, length - 2);
break;
}
cleanup:
- snapend = se;
+ ndo->ndo_snapend = se;
free(b);
return;
+
+trunc:
+ ndo->ndo_snapend = se;
+ free(b);
+ ND_PRINT((ndo, "[|ppp]"));
}
/* PPP */
static void
-handle_ppp(u_int proto, const u_char *p, int length)
+handle_ppp(netdissect_options *ndo,
+ u_int proto, const u_char *p, int length)
{
- if ((proto & 0xff00) == 0x7e00) {/* is this an escape code ? */
- ppp_hdlc(p-1, length);
- return;
- }
+ if ((proto & 0xff00) == 0x7e00) { /* is this an escape code ? */
+ ppp_hdlc(ndo, p - 1, length);
+ return;
+ }
switch (proto) {
case PPP_LCP: /* fall through */
@@ -1346,55 +1465,54 @@ handle_ppp(u_int proto, const u_char *p, int length)
case PPP_IPV6CP:
case PPP_CCP:
case PPP_BACP:
- handle_ctrl_proto(proto, p, length);
+ handle_ctrl_proto(ndo, proto, p, length);
+ break;
+ case PPP_ML:
+ handle_mlppp(ndo, p, length);
break;
- case PPP_ML:
- handle_mlppp(p, length);
- break;
case PPP_CHAP:
- handle_chap(p, length);
+ handle_chap(ndo, p, length);
break;
case PPP_PAP:
- handle_pap(p, length);
+ handle_pap(ndo, p, length);
break;
case PPP_BAP: /* XXX: not yet completed */
- handle_bap(p, length);
+ handle_bap(ndo, p, length);
break;
case ETHERTYPE_IP: /*XXX*/
case PPP_VJNC:
case PPP_IP:
- ip_print(gndo, p, length);
+ ip_print(ndo, p, length);
break;
-#ifdef INET6
case ETHERTYPE_IPV6: /*XXX*/
case PPP_IPV6:
- ip6_print(gndo, p, length);
+ ip6_print(ndo, p, length);
break;
-#endif
case ETHERTYPE_IPX: /*XXX*/
case PPP_IPX:
- ipx_print(p, length);
+ ipx_print(ndo, p, length);
break;
case PPP_OSI:
- isoclns_print(p, length, length);
- break;
+ isoclns_print(ndo, p, length);
+ break;
case PPP_MPLS_UCAST:
case PPP_MPLS_MCAST:
- mpls_print(p, length);
+ mpls_print(ndo, p, length);
break;
case PPP_COMP:
- printf("compressed PPP data");
+ ND_PRINT((ndo, "compressed PPP data"));
break;
default:
- printf("%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", proto));
- print_unknown_data(p,"\n\t",length);
+ ND_PRINT((ndo, "%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", proto)));
+ print_unknown_data(ndo, p, "\n\t", length);
break;
}
}
/* Standard PPP printer */
u_int
-ppp_print(register const u_char *p, u_int length)
+ppp_print(netdissect_options *ndo,
+ register const u_char *p, u_int length)
{
u_int proto,ppp_header;
u_int olen = length; /* _o_riginal length */
@@ -1406,18 +1524,18 @@ ppp_print(register const u_char *p, u_int length)
*/
if (length < 2)
goto trunc;
- TCHECK2(*p, 2);
+ ND_TCHECK2(*p, 2);
ppp_header = EXTRACT_16BITS(p);
switch(ppp_header) {
case (PPP_WITHDIRECTION_IN << 8 | PPP_CONTROL):
- if (eflag) printf("In ");
+ if (ndo->ndo_eflag) ND_PRINT((ndo, "In "));
p += 2;
length -= 2;
hdr_len += 2;
break;
case (PPP_WITHDIRECTION_OUT << 8 | PPP_CONTROL):
- if (eflag) printf("Out ");
+ if (ndo->ndo_eflag) ND_PRINT((ndo, "Out "));
p += 2;
length -= 2;
hdr_len += 2;
@@ -1434,43 +1552,44 @@ ppp_print(register const u_char *p, u_int length)
if (length < 2)
goto trunc;
- TCHECK(*p);
+ ND_TCHECK(*p);
if (*p % 2) {
proto = *p; /* PFC is used */
p++;
length--;
hdr_len++;
} else {
- TCHECK2(*p, 2);
+ ND_TCHECK2(*p, 2);
proto = EXTRACT_16BITS(p);
p += 2;
length -= 2;
hdr_len += 2;
}
- if (eflag)
- printf("%s (0x%04x), length %u: ",
- tok2str(ppptype2str, "unknown", proto),
- proto,
- olen);
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%s (0x%04x), length %u: ",
+ tok2str(ppptype2str, "unknown", proto),
+ proto,
+ olen));
- handle_ppp(proto, p, length);
+ handle_ppp(ndo, proto, p, length);
return (hdr_len);
trunc:
- printf("[|ppp]");
+ ND_PRINT((ndo, "[|ppp]"));
return (0);
}
/* PPP I/F printer */
u_int
-ppp_if_print(const struct pcap_pkthdr *h, register const u_char *p)
+ppp_if_print(netdissect_options *ndo,
+ const struct pcap_pkthdr *h, register const u_char *p)
{
register u_int length = h->len;
register u_int caplen = h->caplen;
if (caplen < PPP_HDRLEN) {
- printf("[|ppp]");
+ ND_PRINT((ndo, "[|ppp]"));
return (caplen);
}
@@ -1511,11 +1630,11 @@ ppp_if_print(const struct pcap_pkthdr *h, register const u_char *p)
* (Is the Cisco framing in question what DLT_C_HDLC, in
* BSD/OS, is?)
*/
- if (eflag)
- printf("%c %4d %02x ", p[0] ? 'O' : 'I', length, p[1]);
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%c %4d %02x ", p[0] ? 'O' : 'I', length, p[1]));
#endif
- ppp_print(p, length);
+ ppp_print(ndo, p, length);
return (0);
}
@@ -1530,7 +1649,8 @@ ppp_if_print(const struct pcap_pkthdr *h, register const u_char *p)
* This handles, for example, DLT_PPP_SERIAL in NetBSD.
*/
u_int
-ppp_hdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
+ppp_hdlc_if_print(netdissect_options *ndo,
+ const struct pcap_pkthdr *h, register const u_char *p)
{
register u_int length = h->len;
register u_int caplen = h->caplen;
@@ -1538,7 +1658,7 @@ ppp_hdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
u_int hdrlen = 0;
if (caplen < 2) {
- printf("[|ppp]");
+ ND_PRINT((ndo, "[|ppp]"));
return (caplen);
}
@@ -1546,12 +1666,12 @@ ppp_hdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
case PPP_ADDRESS:
if (caplen < 4) {
- printf("[|ppp]");
+ ND_PRINT((ndo, "[|ppp]"));
return (caplen);
}
- if (eflag)
- printf("%02x %02x %d ", p[0], p[1], length);
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%02x %02x %d ", p[0], p[1], length));
p += 2;
length -= 2;
hdrlen += 2;
@@ -1560,20 +1680,24 @@ ppp_hdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
p += 2;
length -= 2;
hdrlen += 2;
- printf("%s: ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", proto));
+ ND_PRINT((ndo, "%s: ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", proto)));
- handle_ppp(proto, p, length);
+ handle_ppp(ndo, proto, p, length);
break;
case CHDLC_UNICAST:
case CHDLC_BCAST:
- return (chdlc_if_print(h, p));
+ return (chdlc_if_print(ndo, h, p));
default:
- if (eflag)
- printf("%02x %02x %d ", p[0], p[1], length);
+ if (caplen < 4) {
+ ND_PRINT((ndo, "[|ppp]"));
+ return (caplen);
+ }
+
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%02x %02x %d ", p[0], p[1], length));
p += 2;
- length -= 2;
hdrlen += 2;
/*
@@ -1581,7 +1705,7 @@ ppp_hdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
* the next two octets as an Ethernet type; does that
* ever happen?
*/
- printf("unknown addr %02x; ctrl %02x", p[0], p[1]);
+ ND_PRINT((ndo, "unknown addr %02x; ctrl %02x", p[0], p[1]));
break;
}
@@ -1592,18 +1716,19 @@ ppp_hdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
/* BSD/OS specific PPP printer */
u_int
-ppp_bsdos_if_print(const struct pcap_pkthdr *h _U_, register const u_char *p _U_)
+ppp_bsdos_if_print(netdissect_options *ndo _U_,
+ const struct pcap_pkthdr *h _U_, register const u_char *p _U_)
{
register int hdrlength;
#ifdef __bsdi__
register u_int length = h->len;
register u_int caplen = h->caplen;
- u_int16_t ptype;
+ uint16_t ptype;
const u_char *q;
int i;
if (caplen < PPP_BSDI_HDRLEN) {
- printf("[|ppp]");
+ ND_PRINT((ndo, "[|ppp]"));
return (caplen)
}
@@ -1611,34 +1736,34 @@ ppp_bsdos_if_print(const struct pcap_pkthdr *h _U_, register const u_char *p _U_
#if 0
if (p[0] == PPP_ADDRESS && p[1] == PPP_CONTROL) {
- if (eflag)
- printf("%02x %02x ", p[0], p[1]);
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%02x %02x ", p[0], p[1]));
p += 2;
hdrlength = 2;
}
- if (eflag)
- printf("%d ", length);
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%d ", length));
/* Retrieve the protocol type */
if (*p & 01) {
/* Compressed protocol field */
ptype = *p;
- if (eflag)
- printf("%02x ", ptype);
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%02x ", ptype));
p++;
hdrlength += 1;
} else {
/* Un-compressed protocol field */
ptype = EXTRACT_16BITS(p);
- if (eflag)
- printf("%04x ", ptype);
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%04x ", ptype));
p += 2;
hdrlength += 2;
}
#else
ptype = 0; /*XXX*/
- if (eflag)
- printf("%c ", p[SLC_DIR] ? 'O' : 'I');
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%c ", p[SLC_DIR] ? 'O' : 'I'));
if (p[SLC_LLHL]) {
/* link level header */
struct ppp_header *ph;
@@ -1647,72 +1772,68 @@ ppp_bsdos_if_print(const struct pcap_pkthdr *h _U_, register const u_char *p _U_
ph = (struct ppp_header *)q;
if (ph->phdr_addr == PPP_ADDRESS
&& ph->phdr_ctl == PPP_CONTROL) {
- if (eflag)
- printf("%02x %02x ", q[0], q[1]);
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%02x %02x ", q[0], q[1]));
ptype = EXTRACT_16BITS(&ph->phdr_type);
- if (eflag && (ptype == PPP_VJC || ptype == PPP_VJNC)) {
- printf("%s ", tok2str(ppptype2str,
- "proto-#%d", ptype));
+ if (ndo->ndo_eflag && (ptype == PPP_VJC || ptype == PPP_VJNC)) {
+ ND_PRINT((ndo, "%s ", tok2str(ppptype2str,
+ "proto-#%d", ptype)));
}
} else {
- if (eflag) {
- printf("LLH=[");
+ if (ndo->ndo_eflag) {
+ ND_PRINT((ndo, "LLH=["));
for (i = 0; i < p[SLC_LLHL]; i++)
- printf("%02x", q[i]);
- printf("] ");
+ ND_PRINT((ndo, "%02x", q[i]));
+ ND_PRINT((ndo, "] "));
}
}
}
- if (eflag)
- printf("%d ", length);
+ if (ndo->ndo_eflag)
+ ND_PRINT((ndo, "%d ", length));
if (p[SLC_CHL]) {
q = p + SLC_BPFHDRLEN + p[SLC_LLHL];
switch (ptype) {
case PPP_VJC:
- ptype = vjc_print(q, ptype);
+ ptype = vjc_print(ndo, q, ptype);
hdrlength = PPP_BSDI_HDRLEN;
p += hdrlength;
switch (ptype) {
case PPP_IP:
- ip_print(gndo, p, length);
+ ip_print(ndo, p, length);
break;
-#ifdef INET6
case PPP_IPV6:
- ip6_print(gndo, p, length);
+ ip6_print(ndo, p, length);
break;
-#endif
case PPP_MPLS_UCAST:
case PPP_MPLS_MCAST:
- mpls_print(p, length);
+ mpls_print(ndo, p, length);
break;
}
goto printx;
case PPP_VJNC:
- ptype = vjc_print(q, ptype);
+ ptype = vjc_print(ndo, q, ptype);
hdrlength = PPP_BSDI_HDRLEN;
p += hdrlength;
switch (ptype) {
case PPP_IP:
- ip_print(gndo, p, length);
+ ip_print(ndo, p, length);
break;
-#ifdef INET6
case PPP_IPV6:
- ip6_print(gndo, p, length);
+ ip6_print(ndo, p, length);
break;
-#endif
case PPP_MPLS_UCAST:
case PPP_MPLS_MCAST:
- mpls_print(p, length);
+ mpls_print(ndo, p, length);
break;
}
goto printx;
default:
- if (eflag) {
- printf("CH=[");
+ if (ndo->ndo_eflag) {
+ ND_PRINT((ndo, "CH=["));
for (i = 0; i < p[SLC_LLHL]; i++)
- printf("%02x", q[i]);
- printf("] ");
+ ND_PRINT((ndo, "%02x", q[i]));
+ ND_PRINT((ndo, "] "));
}
break;
}
@@ -1728,17 +1849,15 @@ ppp_bsdos_if_print(const struct pcap_pkthdr *h _U_, register const u_char *p _U_
case PPP_IP:
ip_print(p, length);
break;
-#ifdef INET6
case PPP_IPV6:
- ip6_print(gndo, p, length);
+ ip6_print(ndo, p, length);
+ break;
+ case PPP_MPLS_UCAST:
+ case PPP_MPLS_MCAST:
+ mpls_print(ndo, p, length);
break;
-#endif
- case PPP_MPLS_UCAST:
- case PPP_MPLS_MCAST:
- mpls_print(gndo, p, length);
- break;
default:
- printf("%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", ptype));
+ ND_PRINT((ndo, "%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", ptype)));
}
printx:
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 06:32:30 +0000