Adding upstream version 4.99.4.upstream/4.99.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 473 insertions, 0 deletions

diff --git a/print-arp.c b/print-arp.c
new file mode 100644
index 0000000..9c08502
--- /dev/null
+++ b/print-arp.c
@@ -0,0 +1,473 @@
+/*
+ * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* \summary: Address Resolution Protocol (ARP) printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "ethertype.h"
+#include "extract.h"
+
+
+/*
+ * Address Resolution Protocol.
+ *
+ * See RFC 826 for protocol description.  ARP packets are variable
+ * in size; the arphdr structure defines the fixed-length portion.
+ * Protocol type values are the same as those for 10 Mb/s Ethernet.
+ * It is followed by the variable-sized fields ar_sha, arp_spa,
+ * arp_tha and arp_tpa in that order, according to the lengths
+ * specified.  Field names used correspond to RFC 826.
+ */
+struct  arp_pkthdr {
+        nd_uint16_t ar_hrd;     /* format of hardware address */
+#define ARPHRD_ETHER    1       /* ethernet hardware format */
+#define ARPHRD_IEEE802  6       /* token-ring hardware format */
+#define ARPHRD_ARCNET   7       /* arcnet hardware format */
+#define ARPHRD_FRELAY   15      /* frame relay hardware format */
+#define ARPHRD_ATM2225  19      /* ATM (RFC 2225) */
+#define ARPHRD_STRIP    23      /* Ricochet Starmode Radio hardware format */
+#define ARPHRD_IEEE1394 24      /* IEEE 1394 (FireWire) hardware format */
+#define ARPHRD_INFINIBAND 32    /* InfiniBand RFC 4391 */
+        nd_uint16_t ar_pro;     /* format of protocol address */
+        nd_uint8_t  ar_hln;     /* length of hardware address */
+        nd_uint8_t  ar_pln;     /* length of protocol address */
+        nd_uint16_t ar_op;      /* one of: */
+#define ARPOP_REQUEST   1       /* request to resolve address */
+#define ARPOP_REPLY     2       /* response to previous request */
+#define ARPOP_REVREQUEST 3      /* request protocol address given hardware */
+#define ARPOP_REVREPLY  4       /* response giving protocol address */
+#define ARPOP_INVREQUEST 8      /* request to identify peer */
+#define ARPOP_INVREPLY  9       /* response identifying peer */
+#define ARPOP_NAK       10      /* NAK - only valid for ATM ARP */
+
+/*
+ * The remaining fields are variable in size,
+ * according to the sizes above.
+ */
+#ifdef COMMENT_ONLY
+	nd_byte		ar_sha[];	/* sender hardware address */
+	nd_byte		ar_spa[];	/* sender protocol address */
+	nd_byte		ar_tha[];	/* target hardware address */
+	nd_byte		ar_tpa[];	/* target protocol address */
+#endif
+#define ar_sha(ap)	(((const u_char *)((ap)+1))+  0)
+#define ar_spa(ap)	(((const u_char *)((ap)+1))+  GET_U_1((ap)->ar_hln))
+#define ar_tha(ap)	(((const u_char *)((ap)+1))+  GET_U_1((ap)->ar_hln)+GET_U_1((ap)->ar_pln))
+#define ar_tpa(ap)	(((const u_char *)((ap)+1))+2*GET_U_1((ap)->ar_hln)+GET_U_1((ap)->ar_pln))
+};
+
+#define ARP_HDRLEN	8
+
+#define HRD(ap) GET_BE_U_2((ap)->ar_hrd)
+#define HRD_LEN(ap) GET_U_1((ap)->ar_hln)
+#define PROTO_LEN(ap) GET_U_1((ap)->ar_pln)
+#define OP(ap)  GET_BE_U_2((ap)->ar_op)
+#define PRO(ap) GET_BE_U_2((ap)->ar_pro)
+#define SHA(ap) (ar_sha(ap))
+#define SPA(ap) (ar_spa(ap))
+#define THA(ap) (ar_tha(ap))
+#define TPA(ap) (ar_tpa(ap))
+
+
+static const struct tok arpop_values[] = {
+    { ARPOP_REQUEST, "Request" },
+    { ARPOP_REPLY, "Reply" },
+    { ARPOP_REVREQUEST, "Reverse Request" },
+    { ARPOP_REVREPLY, "Reverse Reply" },
+    { ARPOP_INVREQUEST, "Inverse Request" },
+    { ARPOP_INVREPLY, "Inverse Reply" },
+    { ARPOP_NAK, "NACK Reply" },
+    { 0, NULL }
+};
+
+static const struct tok arphrd_values[] = {
+    { ARPHRD_ETHER, "Ethernet" },
+    { ARPHRD_IEEE802, "TokenRing" },
+    { ARPHRD_ARCNET, "ArcNet" },
+    { ARPHRD_FRELAY, "FrameRelay" },
+    { ARPHRD_STRIP, "Strip" },
+    { ARPHRD_IEEE1394, "IEEE 1394" },
+    { ARPHRD_ATM2225, "ATM" },
+    { ARPHRD_INFINIBAND, "InfiniBand" },
+    { 0, NULL }
+};
+
+/*
+ * ATM Address Resolution Protocol.
+ *
+ * See RFC 2225 for protocol description.  ATMARP packets are similar
+ * to ARP packets, except that there are no length fields for the
+ * protocol address - instead, there are type/length fields for
+ * the ATM number and subaddress - and the hardware addresses consist
+ * of an ATM number and an ATM subaddress.
+ */
+struct  atmarp_pkthdr {
+        nd_uint16_t aar_hrd;    /* format of hardware address */
+        nd_uint16_t aar_pro;    /* format of protocol address */
+        nd_uint8_t  aar_shtl;   /* length of source ATM number */
+        nd_uint8_t  aar_sstl;   /* length of source ATM subaddress */
+#define ATMARP_IS_E164  0x40    /* bit in type/length for E.164 format */
+#define ATMARP_LEN_MASK 0x3F    /* length of {sub}address in type/length */
+        nd_uint16_t aar_op;     /* same as regular ARP */
+        nd_uint8_t  aar_spln;   /* length of source protocol address */
+        nd_uint8_t  aar_thtl;   /* length of target ATM number */
+        nd_uint8_t  aar_tstl;   /* length of target ATM subaddress */
+        nd_uint8_t  aar_tpln;   /* length of target protocol address */
+/*
+ * The remaining fields are variable in size,
+ * according to the sizes above.
+ */
+#ifdef COMMENT_ONLY
+	nd_byte		aar_sha[];	/* source ATM number */
+	nd_byte		aar_ssa[];	/* source ATM subaddress */
+	nd_byte		aar_spa[];	/* sender protocol address */
+	nd_byte		aar_tha[];	/* target ATM number */
+	nd_byte		aar_tsa[];	/* target ATM subaddress */
+	nd_byte		aar_tpa[];	/* target protocol address */
+#endif
+
+#define ATMHRD(ap)  GET_BE_U_2((ap)->aar_hrd)
+#define ATMSHRD_LEN(ap) (GET_U_1((ap)->aar_shtl) & ATMARP_LEN_MASK)
+#define ATMSSLN(ap) (GET_U_1((ap)->aar_sstl) & ATMARP_LEN_MASK)
+#define ATMSPROTO_LEN(ap) GET_U_1((ap)->aar_spln)
+#define ATMOP(ap)   GET_BE_U_2((ap)->aar_op)
+#define ATMPRO(ap)  GET_BE_U_2((ap)->aar_pro)
+#define ATMTHRD_LEN(ap) (GET_U_1((ap)->aar_thtl) & ATMARP_LEN_MASK)
+#define ATMTSLN(ap) (GET_U_1((ap)->aar_tstl) & ATMARP_LEN_MASK)
+#define ATMTPROTO_LEN(ap) GET_U_1((ap)->aar_tpln)
+#define aar_sha(ap)	((const u_char *)((ap)+1))
+#define aar_ssa(ap)	(aar_sha(ap) + ATMSHRD_LEN(ap))
+#define aar_spa(ap)	(aar_ssa(ap) + ATMSSLN(ap))
+#define aar_tha(ap)	(aar_spa(ap) + ATMSPROTO_LEN(ap))
+#define aar_tsa(ap)	(aar_tha(ap) + ATMTHRD_LEN(ap))
+#define aar_tpa(ap)	(aar_tsa(ap) + ATMTSLN(ap))
+};
+
+#define ATMSHA(ap) (aar_sha(ap))
+#define ATMSSA(ap) (aar_ssa(ap))
+#define ATMSPA(ap) (aar_spa(ap))
+#define ATMTHA(ap) (aar_tha(ap))
+#define ATMTSA(ap) (aar_tsa(ap))
+#define ATMTPA(ap) (aar_tpa(ap))
+
+static int
+isnonzero(netdissect_options *ndo, const u_char *a, size_t len)
+{
+	while (len > 0) {
+		if (GET_U_1(a) != 0)
+			return (1);
+		a++;
+		len--;
+	}
+	return (0);
+}
+
+static void
+tpaddr_print_ip(netdissect_options *ndo,
+	        const struct arp_pkthdr *ap, u_short pro)
+{
+	if (pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL)
+		ND_PRINT("<wrong proto type>");
+	else if (PROTO_LEN(ap) != 4)
+		ND_PRINT("<wrong len>");
+	else
+		ND_PRINT("%s", GET_IPADDR_STRING(TPA(ap)));
+}
+
+static void
+spaddr_print_ip(netdissect_options *ndo,
+	        const struct arp_pkthdr *ap, u_short pro)
+{
+	if (pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL)
+		ND_PRINT("<wrong proto type>");
+	else if (PROTO_LEN(ap) != 4)
+		ND_PRINT("<wrong len>");
+	else
+		ND_PRINT("%s", GET_IPADDR_STRING(SPA(ap)));
+}
+
+static void
+atmarp_addr_print(netdissect_options *ndo,
+		  const u_char *ha, u_int ha_len, const u_char *srca,
+    u_int srca_len)
+{
+	if (ha_len == 0)
+		ND_PRINT("<No address>");
+	else {
+		ND_PRINT("%s", GET_LINKADDR_STRING(ha, LINKADDR_ATM, ha_len));
+		if (srca_len != 0)
+			ND_PRINT(",%s",
+				  GET_LINKADDR_STRING(srca, LINKADDR_ATM, srca_len));
+	}
+}
+
+static void
+atmarp_tpaddr_print(netdissect_options *ndo,
+		    const struct atmarp_pkthdr *ap, u_short pro)
+{
+	if (pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL)
+		ND_PRINT("<wrong proto type>");
+	else if (ATMTPROTO_LEN(ap) != 4)
+		ND_PRINT("<wrong tplen>");
+	else
+		ND_PRINT("%s", GET_IPADDR_STRING(ATMTPA(ap)));
+}
+
+static void
+atmarp_spaddr_print(netdissect_options *ndo,
+		    const struct atmarp_pkthdr *ap, u_short pro)
+{
+	if (pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL)
+		ND_PRINT("<wrong proto type>");
+	else if (ATMSPROTO_LEN(ap) != 4)
+		ND_PRINT("<wrong splen>");
+	else
+		ND_PRINT("%s", GET_IPADDR_STRING(ATMSPA(ap)));
+}
+
+static void
+atmarp_print(netdissect_options *ndo,
+	     const u_char *bp, u_int length, u_int caplen)
+{
+	const struct atmarp_pkthdr *ap;
+	u_short pro, hrd, op;
+
+	ap = (const struct atmarp_pkthdr *)bp;
+	ND_TCHECK_SIZE(ap);
+
+	hrd = ATMHRD(ap);
+	pro = ATMPRO(ap);
+	op = ATMOP(ap);
+
+	ND_TCHECK_LEN(ATMTPA(ap), ATMTPROTO_LEN(ap));
+
+        if (!ndo->ndo_eflag) {
+            ND_PRINT("ARP, ");
+        }
+
+	if ((pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL) ||
+	    ATMSPROTO_LEN(ap) != 4 ||
+            ATMTPROTO_LEN(ap) != 4 ||
+            ndo->ndo_vflag) {
+                ND_PRINT("%s, %s (len %u/%u)",
+                          tok2str(arphrd_values, "Unknown Hardware (%u)", hrd),
+                          tok2str(ethertype_values, "Unknown Protocol (0x%04x)", pro),
+                          ATMSPROTO_LEN(ap),
+                          ATMTPROTO_LEN(ap));
+
+                /* don't know about the address formats */
+                if (!ndo->ndo_vflag) {
+                    goto out;
+                }
+	}
+
+        /* print operation */
+        ND_PRINT("%s%s ",
+               ndo->ndo_vflag ? ", " : "",
+               tok2str(arpop_values, "Unknown (%u)", op));
+
+	switch (op) {
+
+	case ARPOP_REQUEST:
+		ND_PRINT("who-has ");
+		atmarp_tpaddr_print(ndo, ap, pro);
+		if (ATMTHRD_LEN(ap) != 0) {
+			ND_PRINT(" (");
+			atmarp_addr_print(ndo, ATMTHA(ap), ATMTHRD_LEN(ap),
+			    ATMTSA(ap), ATMTSLN(ap));
+			ND_PRINT(")");
+		}
+		ND_PRINT(" tell ");
+		atmarp_spaddr_print(ndo, ap, pro);
+		break;
+
+	case ARPOP_REPLY:
+		atmarp_spaddr_print(ndo, ap, pro);
+		ND_PRINT(" is-at ");
+		atmarp_addr_print(ndo, ATMSHA(ap), ATMSHRD_LEN(ap), ATMSSA(ap),
+                                  ATMSSLN(ap));
+		break;
+
+	case ARPOP_INVREQUEST:
+		ND_PRINT("who-is ");
+		atmarp_addr_print(ndo, ATMTHA(ap), ATMTHRD_LEN(ap), ATMTSA(ap),
+		    ATMTSLN(ap));
+		ND_PRINT(" tell ");
+		atmarp_addr_print(ndo, ATMSHA(ap), ATMSHRD_LEN(ap), ATMSSA(ap),
+		    ATMSSLN(ap));
+		break;
+
+	case ARPOP_INVREPLY:
+		atmarp_addr_print(ndo, ATMSHA(ap), ATMSHRD_LEN(ap), ATMSSA(ap),
+		    ATMSSLN(ap));
+		ND_PRINT("at ");
+		atmarp_spaddr_print(ndo, ap, pro);
+		break;
+
+	case ARPOP_NAK:
+		ND_PRINT("for ");
+		atmarp_spaddr_print(ndo, ap, pro);
+		break;
+
+	default:
+		ND_DEFAULTPRINT((const u_char *)ap, caplen);
+		return;
+	}
+
+ out:
+        ND_PRINT(", length %u", length);
+}
+
+void
+arp_print(netdissect_options *ndo,
+	  const u_char *bp, u_int length, u_int caplen)
+{
+	const struct arp_pkthdr *ap;
+	u_short pro, hrd, op, linkaddr;
+
+	ndo->ndo_protocol = "arp";
+	ap = (const struct arp_pkthdr *)bp;
+	ND_TCHECK_SIZE(ap);
+
+	hrd = HRD(ap);
+	pro = PRO(ap);
+	op = OP(ap);
+
+
+        /* if its ATM then call the ATM ARP printer
+           for Frame-relay ARP most of the fields
+           are similar to Ethernet so overload the Ethernet Printer
+           and set the linkaddr type for GET_LINKADDR_STRING() accordingly */
+
+        switch(hrd) {
+        case ARPHRD_ATM2225:
+            atmarp_print(ndo, bp, length, caplen);
+            return;
+        case ARPHRD_FRELAY:
+            linkaddr = LINKADDR_FRELAY;
+            break;
+        default:
+            linkaddr = LINKADDR_ETHER;
+            break;
+	}
+
+	ND_TCHECK_LEN(TPA(ap), PROTO_LEN(ap));
+
+        if (!ndo->ndo_eflag) {
+            ND_PRINT("ARP, ");
+        }
+
+        /* print hardware type/len and proto type/len */
+        if ((pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL) ||
+	    PROTO_LEN(ap) != 4 ||
+            HRD_LEN(ap) == 0 ||
+            ndo->ndo_vflag) {
+            ND_PRINT("%s (len %u), %s (len %u)",
+                      tok2str(arphrd_values, "Unknown Hardware (%u)", hrd),
+                      HRD_LEN(ap),
+                      tok2str(ethertype_values, "Unknown Protocol (0x%04x)", pro),
+                      PROTO_LEN(ap));
+
+            /* don't know about the address formats */
+            if (!ndo->ndo_vflag) {
+                goto out;
+            }
+	}
+
+        /* print operation */
+        ND_PRINT("%s%s ",
+               ndo->ndo_vflag ? ", " : "",
+               tok2str(arpop_values, "Unknown (%u)", op));
+
+	switch (op) {
+
+	case ARPOP_REQUEST:
+		ND_PRINT("who-has ");
+		tpaddr_print_ip(ndo, ap, pro);
+		if (isnonzero(ndo, (const u_char *)THA(ap), HRD_LEN(ap)))
+			ND_PRINT(" (%s)",
+				  GET_LINKADDR_STRING(THA(ap), linkaddr, HRD_LEN(ap)));
+		ND_PRINT(" tell ");
+		spaddr_print_ip(ndo, ap, pro);
+		break;
+
+	case ARPOP_REPLY:
+		spaddr_print_ip(ndo, ap, pro);
+		ND_PRINT(" is-at %s",
+                          GET_LINKADDR_STRING(SHA(ap), linkaddr, HRD_LEN(ap)));
+		break;
+
+	case ARPOP_REVREQUEST:
+		/*
+		 * XXX - GET_LINKADDR_STRING() may return a pointer to
+		 * a static buffer, so we only have one call to it per
+		 * ND_PRINT() call.
+		 *
+		 * This should be done in a cleaner fashion.
+		 */
+		ND_PRINT("who-is %s",
+			  GET_LINKADDR_STRING(THA(ap), linkaddr, HRD_LEN(ap)));
+		ND_PRINT(" tell %s",
+			  GET_LINKADDR_STRING(SHA(ap), linkaddr, HRD_LEN(ap)));
+		break;
+
+	case ARPOP_REVREPLY:
+		ND_PRINT("%s at ",
+			  GET_LINKADDR_STRING(THA(ap), linkaddr, HRD_LEN(ap)));
+		tpaddr_print_ip(ndo, ap, pro);
+		break;
+
+	case ARPOP_INVREQUEST:
+		/*
+		 * XXX - GET_LINKADDR_STRING() may return a pointer to
+		 * a static buffer, so we only have one call to it per
+		 * ND_PRINT() call.
+		 *
+		 * This should be done in a cleaner fashion.
+		 */
+		ND_PRINT("who-is %s",
+			  GET_LINKADDR_STRING(THA(ap), linkaddr, HRD_LEN(ap)));
+		ND_PRINT(" tell %s",
+			  GET_LINKADDR_STRING(SHA(ap), linkaddr, HRD_LEN(ap)));
+		break;
+
+	case ARPOP_INVREPLY:
+		ND_PRINT("%s at ",
+			  GET_LINKADDR_STRING(SHA(ap), linkaddr, HRD_LEN(ap)));
+		spaddr_print_ip(ndo, ap, pro);
+		break;
+
+	default:
+		ND_DEFAULTPRINT((const u_char *)ap, caplen);
+		return;
+	}
+
+ out:
+        ND_PRINT(", length %u", length);
+}