prepare dhcp decoding

4 files changed, 309 insertions, 2 deletions

diff --git a/libopie2/opienet/dhcp.h b/libopie2/opienet/dhcp.h
new file mode 100644
index 0000000..3f2f775
--- a/dev/null
+++ b/libopie2/opienet/dhcp.h
@@ -0,0 +1,200 @@
+/* dhcp.h
+
+   Protocol structures... */
+
+/*
+ * Copyright (c) 1995-2001 The Internet Software Consortium.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of The Internet Software Consortium 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 BY THE INTERNET SOFTWARE CONSORTIUM AND
+ * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This software has been written for the Internet Software Consortium
+ * by Ted Lemon in cooperation with Vixie Enterprises.  To learn more
+ * about the Internet Software Consortium, see ``http://www.isc.org''.
+ * To learn more about Vixie Enterprises, see ``http://www.vix.com''.
+ */
+
+#ifndef DHCP_H
+#define DHCP_H
+
+#define DHCP_UDP_OVERHEAD	(14 + /* Ethernet header */		\
+				 20 + /* IP header */			\
+				 8)   /* UDP header */
+#define DHCP_SNAME_LEN		64
+#define DHCP_FILE_LEN		128
+#define DHCP_FIXED_NON_UDP	236
+#define DHCP_FIXED_LEN		(DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
+						/* Everything but options. */
+#define DHCP_MTU_MAX		1500
+#define DHCP_OPTION_LEN		(DHCP_MTU_MAX - DHCP_FIXED_LEN)
+
+#define BOOTP_MIN_LEN		300
+#define DHCP_MIN_LEN            548
+
+struct dhcp_packet {
+  	u_int8_t  op;		/* 0: Message opcode/type */
+	u_int8_t  htype;	/* 1: Hardware addr type (net/if_types.h) */
+	u_int8_t  hlen;		/* 2: Hardware addr length */
+	u_int8_t  hops;		/* 3: Number of relay agent hops from client */
+	u_int32_t xid;		/* 4: Transaction ID */
+	u_int16_t secs;		/* 8: Seconds since client started looking */
+	u_int16_t flags;	/* 10: Flag bits */
+	struct in_addr ciaddr;	/* 12: Client IP address (if already in use) */
+	struct in_addr yiaddr;	/* 16: Client IP address */
+	struct in_addr siaddr;	/* 18: IP address of next server to talk to */
+	struct in_addr giaddr;	/* 20: DHCP relay agent IP address */
+	unsigned char chaddr [16];	/* 24: Client hardware address */
+	char sname [DHCP_SNAME_LEN];	/* 40: Server name */
+	char file [DHCP_FILE_LEN];	/* 104: Boot filename */
+	unsigned char options [DHCP_OPTION_LEN];
+				/* 212: Optional parameters
+				   (actual length dependent on MTU). */
+};
+
+/* BOOTP (rfc951) message types */
+#define	BOOTREQUEST	1
+#define BOOTREPLY	2
+
+/* Possible values for flags field... */
+#define BOOTP_BROADCAST 32768L
+
+/* Possible values for hardware type (htype) field... */
+#define HTYPE_ETHER	1               /* Ethernet 10Mbps              */
+#define HTYPE_IEEE802	6               /* IEEE 802.2 Token Ring...	*/
+#define HTYPE_FDDI	8		/* FDDI...			*/
+
+/* Magic cookie validating dhcp options field (and bootp vendor
+   extensions field). */
+#define DHCP_OPTIONS_COOKIE	"\143\202\123\143"
+
+/* DHCP Option codes: */
+
+#define DHO_PAD				0
+#define DHO_SUBNET_MASK			1
+#define DHO_TIME_OFFSET			2
+#define DHO_ROUTERS			3
+#define DHO_TIME_SERVERS		4
+#define DHO_NAME_SERVERS		5
+#define DHO_DOMAIN_NAME_SERVERS		6
+#define DHO_LOG_SERVERS			7
+#define DHO_COOKIE_SERVERS		8
+#define DHO_LPR_SERVERS			9
+#define DHO_IMPRESS_SERVERS		10
+#define DHO_RESOURCE_LOCATION_SERVERS	11
+#define DHO_HOST_NAME			12
+#define DHO_BOOT_SIZE			13
+#define DHO_MERIT_DUMP			14
+#define DHO_DOMAIN_NAME			15
+#define DHO_SWAP_SERVER			16
+#define DHO_ROOT_PATH			17
+#define DHO_EXTENSIONS_PATH		18
+#define DHO_IP_FORWARDING		19
+#define DHO_NON_LOCAL_SOURCE_ROUTING	20
+#define DHO_POLICY_FILTER		21
+#define DHO_MAX_DGRAM_REASSEMBLY	22
+#define DHO_DEFAULT_IP_TTL		23
+#define DHO_PATH_MTU_AGING_TIMEOUT	24
+#define DHO_PATH_MTU_PLATEAU_TABLE	25
+#define DHO_INTERFACE_MTU		26
+#define DHO_ALL_SUBNETS_LOCAL		27
+#define DHO_BROADCAST_ADDRESS		28
+#define DHO_PERFORM_MASK_DISCOVERY	29
+#define DHO_MASK_SUPPLIER		30
+#define DHO_ROUTER_DISCOVERY		31
+#define DHO_ROUTER_SOLICITATION_ADDRESS	32
+#define DHO_STATIC_ROUTES		33
+#define DHO_TRAILER_ENCAPSULATION	34
+#define DHO_ARP_CACHE_TIMEOUT		35
+#define DHO_IEEE802_3_ENCAPSULATION	36
+#define DHO_DEFAULT_TCP_TTL		37
+#define DHO_TCP_KEEPALIVE_INTERVAL	38
+#define DHO_TCP_KEEPALIVE_GARBAGE	39
+#define DHO_NIS_DOMAIN			40
+#define DHO_NIS_SERVERS			41
+#define DHO_NTP_SERVERS			42
+#define DHO_VENDOR_ENCAPSULATED_OPTIONS	43
+#define DHO_NETBIOS_NAME_SERVERS	44
+#define DHO_NETBIOS_DD_SERVER		45
+#define DHO_NETBIOS_NODE_TYPE		46
+#define DHO_NETBIOS_SCOPE		47
+#define DHO_FONT_SERVERS		48
+#define DHO_X_DISPLAY_MANAGER		49
+#define DHO_DHCP_REQUESTED_ADDRESS	50
+#define DHO_DHCP_LEASE_TIME		51
+#define DHO_DHCP_OPTION_OVERLOAD	52
+#define DHO_DHCP_MESSAGE_TYPE		53
+#define DHO_DHCP_SERVER_IDENTIFIER	54
+#define DHO_DHCP_PARAMETER_REQUEST_LIST	55
+#define DHO_DHCP_MESSAGE		56
+#define DHO_DHCP_MAX_MESSAGE_SIZE	57
+#define DHO_DHCP_RENEWAL_TIME		58
+#define DHO_DHCP_REBINDING_TIME		59
+#define DHO_VENDOR_CLASS_IDENTIFIER	60
+#define DHO_DHCP_CLIENT_IDENTIFIER	61
+#define DHO_NWIP_DOMAIN_NAME		62
+#define DHO_NWIP_SUBOPTIONS		63
+#define DHO_USER_CLASS			77
+#define DHO_FQDN			81
+#define DHO_DHCP_AGENT_OPTIONS		82
+#define DHO_SUBNET_SELECTION		118 /* RFC3011! */
+/* The DHO_AUTHENTICATE option is not a standard yet, so I've
+   allocated an option out of the "local" option space for it on a
+   temporary basis.  Once an option code number is assigned, I will
+   immediately and shamelessly break this, so don't count on it
+   continuing to work. */
+#define DHO_AUTHENTICATE		210
+
+#define DHO_END				255
+
+/* DHCP message types. */
+#define DHCPDISCOVER	1
+#define DHCPOFFER	2
+#define DHCPREQUEST	3
+#define DHCPDECLINE	4
+#define DHCPACK		5
+#define DHCPNAK		6
+#define DHCPRELEASE	7
+#define DHCPINFORM	8
+
+/* Relay Agent Information option subtypes: */
+#define RAI_CIRCUIT_ID	1
+#define RAI_REMOTE_ID	2
+#define RAI_AGENT_ID	3
+
+/* FQDN suboptions: */
+#define FQDN_NO_CLIENT_UPDATE		1
+#define FQDN_SERVER_UPDATE		2
+#define FQDN_ENCODED			3
+#define FQDN_RCODE1			4
+#define FQDN_RCODE2			5
+#define FQDN_HOSTNAME			6
+#define FQDN_DOMAINNAME			7
+#define FQDN_FQDN			8
+#define FQDN_SUBOPTION_COUNT		8
+
+#endif
\ No newline at end of file
diff --git a/libopie2/opienet/opcap.cpp b/libopie2/opienet/opcap.cpp
index 1de7124..cc8ce7f 100644
--- a/libopie2/opienet/opcap.cpp
+++ b/libopie2/opienet/opcap.cpp
@@ -357,4 +357,5 @@ OUDPPacket::OUDPPacket( const unsigned char* end, const struct udphdr* data, QOb
 }
 
+
 OUDPPacket::~OUDPPacket()
 {
@@ -362,4 +363,46 @@ OUDPPacket::~OUDPPacket()
 
 
+int OUDPPacket::fromPort() const
+{
+    return _udphdr->source;
+}
+
+
+int OUDPPacket::toPort() const
+{
+    return _udphdr->dest;
+}
+
+
+int OUDPPacket::length() const
+{
+    return _udphdr->len;
+}
+
+
+int OUDPPacket::checksum() const
+{
+    return _udphdr->check;
+}
+
+
+/*======================================================================================
+ * ODHCPPacket
+ *======================================================================================*/
+
+
+ODHCPPacket::ODHCPPacket( const unsigned char* end, const struct dhcp_packet* data, QObject* parent )
+           :QObject( parent, "DHCP" ), _dhcphdr( data )
+
+{
+    qDebug( "ODHCPPacket::ODHCPPacket(): decoding DHCP information..." );
+}
+
+
+ODHCPPacket::~ODHCPPacket()
+{
+}
+
+
 /*======================================================================================
  * OTCPPacket
@@ -374,4 +417,5 @@ OTCPPacket::OTCPPacket( const unsigned char* end, const struct tcphdr* data, QOb
 }
 
+
 OTCPPacket::~OTCPPacket()
 {
@@ -379,4 +423,39 @@ OTCPPacket::~OTCPPacket()
 
 
+int OTCPPacket::fromPort() const
+{
+    return _tcphdr->source;
+}
+
+
+int OTCPPacket::toPort() const
+{
+    return _tcphdr->dest;
+}
+
+
+int OTCPPacket::seq() const
+{
+    return _tcphdr->seq;
+}
+
+
+int OTCPPacket::ack() const
+{
+    return _tcphdr->ack_seq;
+}
+
+
+int OTCPPacket::window() const
+{
+    return _tcphdr->window;
+}
+
+
+int OTCPPacket::checksum() const
+{
+    return _tcphdr->check;
+}
+
 /*======================================================================================
  * OPrismHeaderPacket
diff --git a/libopie2/opienet/opcap.h b/libopie2/opienet/opcap.h
index 9119972..0c9e7da 100644
--- a/libopie2/opienet/opcap.h
+++ b/libopie2/opienet/opcap.h
@@ -56,5 +56,8 @@ extern "C"  // work around a bpf/pcap conflict in recent headers
 /* OPIE */
 #include <opie2/onetutils.h>
+
+/* Custom Network Includes */
 #include "802_11_user.h"
+#include "dhcp.h"
 
 /* TYPEDEFS */
@@ -478,4 +481,6 @@ class OUDPPacket : public QObject
     int fromPort() const;
     int toPort() const;
+    int length() const;
+    int checksum() const;
 
   private:
@@ -484,4 +489,20 @@ class OUDPPacket : public QObject
 
 /*======================================================================================
+ * ODHCPPacket
+ *======================================================================================*/
+
+class ODHCPPacket : public QObject
+{
+  Q_OBJECT
+
+  public:
+    ODHCPPacket( const unsigned char*, const struct dhcp_packet*, QObject* parent = 0 );
+    virtual ~ODHCPPacket();
+
+  private:
+    const struct dhcp_packet* _dhcphdr;
+};
+
+/*======================================================================================
  * OTCPPacket
  *======================================================================================*/
@@ -497,4 +518,8 @@ class OTCPPacket : public QObject
     int fromPort() const;
     int toPort() const;
+    int seq() const;
+    int ack() const;
+    int window() const;
+    int checksum() const;
 
   private:
@@ -511,5 +536,6 @@ class OTCPPacket : public QObject
  *
  * This class is the base of a high-level interface to the well known packet capturing
- * library libpcap. ...
+ * library libpcap.
+ * @see http://tcpdump.org
  */
 class OPacketCapturer : public QObject
diff --git a/libopie2/opienet/opienet.pro b/libopie2/opienet/opienet.pro
index 93389db..7a7adde 100644
--- a/libopie2/opienet/opienet.pro
+++ b/libopie2/opienet/opienet.pro
@@ -2,5 +2,7 @@ TEMPLATE    = lib
 CONFIG      += qt warn_on debug
 DESTDIR     = $(OPIEDIR)/lib
-HEADERS     = omanufacturerdb.cpp \
+HEADERS     = 802_11_user.h       \
+              dhcp.h              \
+              omanufacturerdb.cpp \
               onetutils.cpp       \
               onetwork.h          \