* Routines for BOOTP/DHCP packet disassembly
* Gilbert Ramirez <gram@xiexie.org>
*
- * $Id: packet-bootp.c,v 1.28 2000/03/20 21:39:00 gerald Exp $
+ * $Id: packet-bootp.c,v 1.54 2001/06/18 02:17:45 guy Exp $
*
* The information used comes from:
- * RFC 2132: DHCP Options and BOOTP Vendor Extensions
+ * RFC 951: Bootstrap Protocol
* RFC 1542: Clarifications and Extensions for the Bootstrap Protocol
* RFC 2131: Dynamic Host Configuration Protocol
+ * RFC 2132: DHCP Options and BOOTP Vendor Extensions
+ * RFC 2489: Procedure for Defining New DHCP Options
+ * RFC 3046: DHCP Relay Agent Information Option
+ * BOOTP and DHCP Parameters
+ * http://www.isi.edu/in-notes/iana/assignments/bootp-dhcp-parameters
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
# include <sys/types.h>
#endif
+#include <string.h>
#include <glib.h>
#include "packet.h"
#include "packet-arp.h"
static int hf_bootp_server = -1;
static int hf_bootp_file = -1;
static int hf_bootp_cookie = -1;
+static int hf_bootp_dhcp = -1;
static guint ett_bootp = -1;
static guint ett_bootp_option = -1;
+#define UDP_PORT_BOOTPS 67
+
enum field_type { none, ipv4, string, toggle, yes_no, special, opaque,
time_in_secs,
- val_u_byte, val_u_short, val_u_long,
+ val_u_byte, val_u_short, val_u_le_short, val_u_long,
val_s_long };
struct opt_info {
enum field_type ftype;
};
-#define NUM_OPT_INFOS 77
+#define NUM_OPT_INFOS 211
#define NUM_O63_SUBOPTS 11
-/* returns the number of bytes consumed by this option */
-static int
-bootp_option(const u_char *pd, proto_tree *bp_tree, int voff, int eoff)
-{
- char *text;
- enum field_type ftype;
- u_char code = pd[voff];
- int vlen = pd[voff+1];
- u_char byte;
- int i,slask,optp, consumed = vlen + 2;
- u_long time_secs;
- proto_tree *v_tree,*o63_v_tree;
- proto_item *vti;
-
+static int dissect_vendor_pxeclient_suboption(proto_tree *v_tree, tvbuff_t *tvb,
+ int optp);
+static int dissect_netware_ip_suboption(proto_tree *v_tree, tvbuff_t *tvb,
+ int optp);
+static int bootp_dhcp_decode_agent_info(proto_tree *v_tree, tvbuff_t *tvb,
+ int optp);
+static const char *
+get_dhcp_type(guint8 byte)
+{
static const char *opt53_text[] = {
"Unknown Message Type",
"Discover",
"Release",
"Inform"
};
+ int i;
+
+ if (byte > 0 && byte < (sizeof opt53_text / sizeof opt53_text[0]))
+ i = byte;
+ else
+ i = 0;
+ return opt53_text[i];
+}
+
+/* Returns the number of bytes consumed by this option. */
+static int
+bootp_option(tvbuff_t *tvb, proto_tree *bp_tree, int voff, int eoff,
+ gboolean first_pass, const char **dhcp_type_p,
+ const guint8 **vendor_class_id_p)
+{
+ char *text;
+ enum field_type ftype;
+ u_char code = tvb_get_guint8(tvb, voff);
+ int vlen;
+ u_char byte;
+ int i,optp, consumed;
+ u_long time_secs;
+ proto_tree *v_tree;
+ proto_item *vti;
+ const char *md5_ptr;
+ char md5_str[50];
+
static const value_string nbnt_vals[] = {
{0x1, "B-node" },
{0x2, "P-node" },
{0x8, "H-node" },
{0, NULL } };
- struct o63_opt_info {
- char *truet;
- char *falset;
- enum field_type ft;
- };
-
- static struct o63_opt_info o63_opt[]= {
- /* 0 */ {"","",none},
- /* 1 */ {"NWIP does not exist on subnet","",string},
- /* 2 */ {"NWIP exist in options area","",string},
- /* 3 */ {"NWIP exists in sname/file","",string},
- /* 4 */ {"NWIP exists, but too big","",string},
- /* 5 */ {"Broadcast for nearest Netware server","Do NOT Broadcast for nearest Netware server",yes_no},
- /* 6 */ {"Preferred DSS server","",ipv4},
- /* 7 */ {"Nearest NWIP server","",ipv4},
- /* 8 */ {"Autoretries","",val_u_short},
- /* 9 */ {"Autoretry delay, secs ","",val_u_short},
- /* 10*/ {"Support NetWare/IP v1.1","Do NOT support NetWare/IP v1.1",yes_no},
- /* 11*/ {"Primary DSS ", "" , special} };
-
-
static struct opt_info opt[] = {
/* 0 */ { "Padding", none },
/* 1 */ { "Subnet Mask", ipv4 },
/* 57 */ { "Maximum DHCP Message Size", val_u_short },
/* 58 */ { "Renewal Time Value", time_in_secs },
/* 59 */ { "Rebinding Time Value", time_in_secs },
- /* 60 */ { "Vendor class identifier", opaque },
+ /* 60 */ { "Vendor class identifier", special },
/* 61 */ { "Client identifier", special },
/* 62 */ { "Novell/Netware IP domain", string },
/* 63 */ { "Novell Options", special },
/* 73 */ { "Default Finger Server", ipv4 },
/* 74 */ { "Default IRC Server", ipv4 },
/* 75 */ { "StreetTalk Server", ipv4 },
- /* 76 */ { "StreetTalk Directory Assistance Server", ipv4 }
+ /* 76 */ { "StreetTalk Directory Assistance Server", ipv4 },
+ /* 77 */ { "User Class Information", opaque },
+ /* 78 */ { "Directory Agent Information", opaque },
+ /* 79 */ { "Service Location Agent Scope", opaque },
+ /* 80 */ { "Naming Authority", opaque },
+ /* 81 */ { "Client Fully Qualified Domain Name", opaque },
+ /* 82 */ { "Agent Information Option", special },
+ /* 83 */ { "Unassigned", opaque },
+ /* 84 */ { "Unassigned", opaque },
+ /* 85 */ { "Novell Directory Services Servers", opaque },
+ /* 86 */ { "Novell Directory Services Tree Name", opaque },
+ /* 87 */ { "Novell Directory Services Context", opaque },
+ /* 88 */ { "IEEE 1003.1 POSIX Timezone", opaque },
+ /* 89 */ { "Fully Qualified Domain Name", opaque },
+ /* 90 */ { "Authentication", opaque },
+ /* 91 */ { "Vines TCP/IP Server Option", opaque },
+ /* 92 */ { "Server Selection Option", opaque },
+ /* 93 */ { "Client System Architecture", opaque },
+ /* 94 */ { "Client Network Device Interface", opaque },
+ /* 95 */ { "Lightweight Directory Access Protocol", opaque },
+ /* 96 */ { "IPv6 Transitions", opaque },
+ /* 97 */ { "UUID/GUID-based Client Identifier", opaque },
+ /* 98 */ { "Open Group's User Authentication", opaque },
+ /* 99 */ { "Unassigned", opaque },
+ /* 100 */ { "Printer Name", opaque },
+ /* 101 */ { "MDHCP multicast address", opaque },
+ /* 102 */ { "Removed/unassigned", opaque },
+ /* 103 */ { "Removed/unassigned", opaque },
+ /* 104 */ { "Removed/unassigned", opaque },
+ /* 105 */ { "Removed/unassigned", opaque },
+ /* 106 */ { "Removed/unassigned", opaque },
+ /* 107 */ { "Removed/unassigned", opaque },
+ /* 108 */ { "Swap Path Option", opaque },
+ /* 109 */ { "Unassigned", opaque },
+ /* 110 */ { "IPX Compability", opaque },
+ /* 111 */ { "Unassigned", opaque },
+ /* 112 */ { "Netinfo Parent Server Address", opaque },
+ /* 113 */ { "Netinfo Parent Server Tag", opaque },
+ /* 114 */ { "URL", opaque },
+ /* 115 */ { "DHCP Failover Protocol", opaque },
+ /* 116 */ { "DHCP Auto-Configuration", opaque },
+ /* 117 */ { "Unassigned", opaque },
+ /* 118 */ { "Unassigned", opaque },
+ /* 119 */ { "Unassigned", opaque },
+ /* 120 */ { "Unassigned", opaque },
+ /* 121 */ { "Unassigned", opaque },
+ /* 122 */ { "Unassigned", opaque },
+ /* 123 */ { "Unassigned", opaque },
+ /* 124 */ { "Unassigned", opaque },
+ /* 125 */ { "Unassigned", opaque },
+ /* 126 */ { "Extension", opaque },
+ /* 127 */ { "Extension", opaque },
+ /* 128 */ { "Private", opaque },
+ /* 129 */ { "Private", opaque },
+ /* 130 */ { "Private", opaque },
+ /* 131 */ { "Private", opaque },
+ /* 132 */ { "Private", opaque },
+ /* 133 */ { "Private", opaque },
+ /* 134 */ { "Private", opaque },
+ /* 135 */ { "Private", opaque },
+ /* 136 */ { "Private", opaque },
+ /* 137 */ { "Private", opaque },
+ /* 138 */ { "Private", opaque },
+ /* 139 */ { "Private", opaque },
+ /* 140 */ { "Private", opaque },
+ /* 141 */ { "Private", opaque },
+ /* 142 */ { "Private", opaque },
+ /* 143 */ { "Private", opaque },
+ /* 144 */ { "Private", opaque },
+ /* 145 */ { "Private", opaque },
+ /* 146 */ { "Private", opaque },
+ /* 147 */ { "Private", opaque },
+ /* 148 */ { "Private", opaque },
+ /* 149 */ { "Private", opaque },
+ /* 150 */ { "Private", opaque },
+ /* 151 */ { "Private", opaque },
+ /* 152 */ { "Private", opaque },
+ /* 153 */ { "Private", opaque },
+ /* 154 */ { "Private", opaque },
+ /* 155 */ { "Private", opaque },
+ /* 156 */ { "Private", opaque },
+ /* 157 */ { "Private", opaque },
+ /* 158 */ { "Private", opaque },
+ /* 159 */ { "Private", opaque },
+ /* 160 */ { "Private", opaque },
+ /* 161 */ { "Private", opaque },
+ /* 162 */ { "Private", opaque },
+ /* 163 */ { "Private", opaque },
+ /* 164 */ { "Private", opaque },
+ /* 165 */ { "Private", opaque },
+ /* 166 */ { "Private", opaque },
+ /* 167 */ { "Private", opaque },
+ /* 168 */ { "Private", opaque },
+ /* 169 */ { "Private", opaque },
+ /* 170 */ { "Private", opaque },
+ /* 171 */ { "Private", opaque },
+ /* 172 */ { "Private", opaque },
+ /* 173 */ { "Private", opaque },
+ /* 174 */ { "Private", opaque },
+ /* 175 */ { "Private", opaque },
+ /* 176 */ { "Private", opaque },
+ /* 177 */ { "Private", opaque },
+ /* 178 */ { "Private", opaque },
+ /* 179 */ { "Private", opaque },
+ /* 180 */ { "Private", opaque },
+ /* 181 */ { "Private", opaque },
+ /* 182 */ { "Private", opaque },
+ /* 183 */ { "Private", opaque },
+ /* 184 */ { "Private", opaque },
+ /* 185 */ { "Private", opaque },
+ /* 186 */ { "Private", opaque },
+ /* 187 */ { "Private", opaque },
+ /* 188 */ { "Private", opaque },
+ /* 189 */ { "Private", opaque },
+ /* 190 */ { "Private", opaque },
+ /* 191 */ { "Private", opaque },
+ /* 192 */ { "Private", opaque },
+ /* 193 */ { "Private", opaque },
+ /* 194 */ { "Private", opaque },
+ /* 195 */ { "Private", opaque },
+ /* 196 */ { "Private", opaque },
+ /* 197 */ { "Private", opaque },
+ /* 198 */ { "Private", opaque },
+ /* 199 */ { "Private", opaque },
+ /* 200 */ { "Private", opaque },
+ /* 201 */ { "Private", opaque },
+ /* 202 */ { "Private", opaque },
+ /* 203 */ { "Private", opaque },
+ /* 204 */ { "Private", opaque },
+ /* 205 */ { "Private", opaque },
+ /* 206 */ { "Private", opaque },
+ /* 207 */ { "Private", opaque },
+ /* 208 */ { "Private", opaque },
+ /* 209 */ { "Private", opaque },
+ /* 210 */ { "Authentication", special }
};
- text = opt[code].text;
- /* Special cases */
+ /* Options whose length isn't "vlen + 2". */
switch (code) {
- /* Padding */
- case 0:
- /* check how much padding we have */
- for (i = voff + 1; i < eoff; i++ ) {
- if (pd[i] != 0) {
- break;
- }
- }
- i = i - voff;
- proto_tree_add_text(bp_tree, voff, i, "Padding");
- consumed = i;
- return consumed;
- /* Policy Filter */
- case 21:
- /* one IP address pair */
- if (vlen == 8) {
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %s/%s", code, text,
- ip_to_str((guint8*)&pd[voff+2]),
- ip_to_str((guint8*)&pd[voff+6]));
+ case 0: /* Padding */
+ /* check how much padding we have */
+ for (i = voff + 1; i < eoff; i++ ) {
+ if (tvb_get_guint8(tvb, i) != 0) {
+ break;
}
- /* > 1 IP address pair. Let's make a sub-tree */
- else {
-
- vti = proto_tree_add_text(bp_tree, voff,
- consumed, "Option %d: %s", code, text);
- v_tree = proto_item_add_subtree(vti, ett_bootp_option);
- for (i = voff + 2; i < voff + consumed; i += 8) {
- proto_tree_add_text(v_tree, i, 8, "IP Address/Mask: %s/%s",
- ip_to_str((guint8*)&pd[i]),
- ip_to_str((guint8*)&pd[i+4]));
- }
+ }
+ i = i - voff;
+ if (!first_pass) {
+ if (bp_tree != NULL) {
+ proto_tree_add_text(bp_tree, tvb, voff, i,
+ "Padding");
}
- break;
+ }
+ consumed = i;
+ return consumed;
+ break;
- /* Static Route */
- case 33:
- /* one IP address pair */
- if (vlen == 8) {
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %s/%s", code, text,
- ip_to_str((guint8*)&pd[voff+2]),
- ip_to_str((guint8*)&pd[voff+6]));
+ case 255: /* End Option */
+ if (!first_pass) {
+ if (bp_tree != NULL) {
+ proto_tree_add_text(bp_tree, tvb, voff, 1,
+ "End Option");
}
- /* > 1 IP address pair. Let's make a sub-tree */
- else {
+ }
+ consumed = 1;
+ return consumed;
+ }
- vti = proto_tree_add_text(bp_tree, voff,
- consumed, "Option %d: %s", code, text);
- v_tree = proto_item_add_subtree(vti, ett_bootp_option);
- for (i = voff + 2; i < voff + consumed; i += 8) {
- proto_tree_add_text(v_tree, i, 8,
- "Destination IP Address/Router: %s/%s",
- ip_to_str((guint8*)&pd[i]),
- ip_to_str((guint8*)&pd[i+4]));
- }
- }
- break;
+ /*
+ * Get the length of the option, and the number of bytes it
+ * consumes (the length doesn't include the option code or
+ * length bytes).
+ */
+ vlen = tvb_get_guint8(tvb, voff+1);
+ consumed = vlen + 2;
+
+ /*
+ * In the first pass, we don't put anything into the protocol
+ * tree; we just check for some options we have to look at
+ * in order to properly process the packet:
+ *
+ * 53 (DHCP message type) - if this is present, this is DHCP
+ *
+ * 60 (Vendor class identifier) - we need this in order to
+ * interpret the vendor-specific info
+ */
+ if (first_pass) {
+ switch (code) {
- /* Vendor-Specific Info */
- case 43:
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s", code, text);
+ case 53:
+ *dhcp_type_p =
+ get_dhcp_type(tvb_get_guint8(tvb, voff+2));
break;
- /* NetBIOS-over-TCP/IP Node Type */
- case 46:
- byte = pd[voff+2];
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %s", code, text,
- val_to_str(byte, nbnt_vals,
- "Unknown (0x%02x)"));
- break;
-
- /* DHCP Message Type */
- case 53:
- byte = pd[voff+2];
- if (byte > 0 && byte < 9) {
- i = byte;
- }
- else {
- i = 0;
- }
- proto_tree_add_text(bp_tree, voff, 3, "Option %d: %s = DHCP %s",
- code, text, opt53_text[i]);
+ case 60:
+ *vendor_class_id_p =
+ tvb_get_ptr(tvb, voff+2, consumed-2);
break;
+ }
+
+ /*
+ * We don't do anything else here.
+ */
+ return consumed;
+ }
+
+ /*
+ * This is the second pass - if there's a protocol tree to be
+ * built, we put stuff into it, otherwise we just return.
+ */
+ if (bp_tree == NULL) {
+ /* Don't put anything in the protocol tree. */
+ return consumed;
+ }
+
+ text = opt[code].text;
+ /* Special cases */
+ switch (code) {
- /* Parameter Request List */
- case 55:
- vti = proto_tree_add_text(bp_tree, voff,
- vlen + 2, "Option %d: %s", code, text);
+ case 21: /* Policy Filter */
+ if (vlen == 8) {
+ /* one IP address pair */
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %s/%s", code, text,
+ ip_to_str(tvb_get_ptr(tvb, voff+2, 4)),
+ ip_to_str(tvb_get_ptr(tvb, voff+6, 4)));
+ } else {
+ /* > 1 IP address pair. Let's make a sub-tree */
+ vti = proto_tree_add_text(bp_tree, tvb, voff,
+ consumed, "Option %d: %s", code, text);
v_tree = proto_item_add_subtree(vti, ett_bootp_option);
- for (i = 0; i < vlen; i++) {
- byte = pd[voff+2+i];
- if (byte < NUM_OPT_INFOS) {
- proto_tree_add_text(v_tree, voff+2+i, 1, "%d = %s",
- byte, opt[byte].text);
- }
- else {
- proto_tree_add_text(vti, voff+2+i, 1,
- "Unknown Option Code: %d", byte);
- }
+ for (i = voff + 2; i < voff + consumed; i += 8) {
+ proto_tree_add_text(v_tree, tvb, i, 8, "IP Address/Mask: %s/%s",
+ ip_to_str(tvb_get_ptr(tvb, i, 4)),
+ ip_to_str(tvb_get_ptr(tvb, i+4, 4)));
}
- break;
+ }
+ break;
- /* Client Identifier */
- case 61:
- /* We *MAY* use hwtype/hwaddr. If we have 7 bytes, I'll
- guess that the first is the hwtype, and the last 6 are
- the hw addr */
- if (vlen == 7) {
- vti = proto_tree_add_text(bp_tree, voff,
- consumed, "Option %d: %s", code, text);
- v_tree = proto_item_add_subtree(vti, ett_bootp_option);
- proto_tree_add_text(v_tree, voff+2, 1,
- "Hardware type: %s",
- arphrdtype_to_str(pd[voff+2],
- "Unknown (0x%02x)"));
- proto_tree_add_text(v_tree, voff+3, 6,
- "Client hardware address: %s",
- arphrdaddr_to_str((guint8*)&pd[voff+3],
- 6, pd[voff+2]));
- }
- /* otherwise, it's opaque data */
- else {
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s (%d bytes)", code, text, vlen);
+ case 33: /* Static Route */
+ if (vlen == 8) {
+ /* one IP address pair */
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %s/%s", code, text,
+ ip_to_str(tvb_get_ptr(tvb, voff+2, 4)),
+ ip_to_str(tvb_get_ptr(tvb, voff+6, 4)));
+ } else {
+ /* > 1 IP address pair. Let's make a sub-tree */
+ vti = proto_tree_add_text(bp_tree, tvb, voff,
+ consumed, "Option %d: %s", code, text);
+ v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+ for (i = voff + 2; i < voff + consumed; i += 8) {
+ proto_tree_add_text(v_tree, tvb, i, 8,
+ "Destination IP Address/Router: %s/%s",
+ ip_to_str(tvb_get_ptr(tvb, i, 4)),
+ ip_to_str(tvb_get_ptr(tvb, i+4, 4)));
}
- break;
+ }
+ break;
- /* NetWare/IP options */
- case 63:
- vti = proto_tree_add_text(bp_tree, voff,
- consumed, "Option %d: %s", code, text);
+ case 43: /* Vendor-Specific Info */
+ /* PXE protocol 2.1 as described in the intel specs */
+ if (*vendor_class_id_p != NULL &&
+ strncmp(*vendor_class_id_p, "PXEClient", strlen("PXEClient")) == 0) {
+ vti = proto_tree_add_text(bp_tree, tvb, voff,
+ consumed, "Option %d: %s (PXEClient)", code, text);
v_tree = proto_item_add_subtree(vti, ett_bootp_option);
- i=1;
- optp=voff+2;
- while ( optp < (voff+consumed) ) {
- if (pd[optp] > NUM_O63_SUBOPTS) {
- proto_tree_add_text(v_tree,optp,1,"Unknown suboption %d", pd[optp]);
- optp++;
- } else {
-
- switch (o63_opt[pd[optp]].ft) {
-
- case string:
- proto_tree_add_text(v_tree, optp, 2, "Suboption %d: %s", pd[optp], o63_opt[pd[optp]].truet);
- optp+=2;
- break;
-
- case yes_no:
- if (pd[optp+2]==1) {
- proto_tree_add_text(v_tree, optp, 3, "Suboption %d: %s", pd[optp], o63_opt[pd[optp]].truet);
- } else {
- proto_tree_add_text(v_tree, optp, 3, "Suboption %d: %s" , pd[optp], o63_opt[pd[optp]].falset);
- }
- optp+=3;
- break;
-
- case special:
- proto_tree_add_text(v_tree, optp, 6,
- "Suboption %d: %s = %s" ,
- pd[optp], o63_opt[pd[optp]].truet,
- ip_to_str((guint8*)&pd[optp+2]));
- optp=optp+6;
- break;
-
- case val_u_short:
- proto_tree_add_text(v_tree, optp, 3, "Suboption %d: %s = %d",pd[optp], o63_opt[pd[optp]].truet, pd[optp+2]);
- optp+=3;
- break;
-
- case ipv4:
- /* one IP address */
- if (pd[optp+1] == 4) {
- proto_tree_add_text(v_tree, optp, 6,
- "Suboption %d : %s = %s" ,
- pd[optp], o63_opt[pd[optp]].truet,
- ip_to_str((guint8*)&pd[optp+2]));
- optp=optp+6;
+ optp = voff+2;
+ while (optp < voff+consumed) {
+ optp = dissect_vendor_pxeclient_suboption(v_tree,
+ tvb, optp);
+ }
+ } else {
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s (%d bytes)", code, text, vlen);
}
- /* > 1 IP addresses. Let's make a sub-tree */
- else {
+ break;
+
+ case 46: /* NetBIOS-over-TCP/IP Node Type */
+ byte = tvb_get_guint8(tvb, voff+2);
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %s", code, text,
+ val_to_str(byte, nbnt_vals,
+ "Unknown (0x%02x)"));
+ break;
+
+ case 53: /* DHCP Message Type */
+ proto_tree_add_text(bp_tree, tvb, voff, 3, "Option %d: %s = DHCP %s",
+ code, text, get_dhcp_type(tvb_get_guint8(tvb, voff+2)));
+ break;
- vti = proto_tree_add_text(v_tree, optp,
- pd[optp+1]+2, "Suboption %d: %s",
- pd[optp], o63_opt[pd[optp]].truet);
- o63_v_tree = proto_item_add_subtree(vti, ett_bootp_option);
- for (slask = optp + 2 ; slask < optp+pd[optp+1]; slask += 4) {
- proto_tree_add_text(o63_v_tree, slask, 4, "IP Address: %s",
- ip_to_str((guint8*)&pd[slask]));
+ case 55: /* Parameter Request List */
+ vti = proto_tree_add_text(bp_tree, tvb, voff,
+ vlen + 2, "Option %d: %s", code, text);
+ v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+ for (i = 0; i < vlen; i++) {
+ byte = tvb_get_guint8(tvb, voff+2+i);
+ if (byte < NUM_OPT_INFOS) {
+ proto_tree_add_text(v_tree, tvb, voff+2+i, 1, "%d = %s",
+ byte, opt[byte].text);
+ } else {
+ proto_tree_add_text(vti, tvb, voff+2+i, 1,
+ "Unknown Option Code: %d", byte);
}
- optp=slask;
}
break;
- default:
- proto_tree_add_text(v_tree,optp,1,"Unknown suboption %d", pd[optp]);
- optp++;
- break;
- }
- }
- i++;
- }
- break;
- /* End Option */
- case 255:
- proto_tree_add_text(bp_tree, voff, 1, "End Option");
- consumed = 1;
- return consumed;
+ case 60: /* Vendor class identifier */
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = \"%.*s\"", code, text, vlen,
+ tvb_get_ptr(tvb, voff+2, consumed-2));
+ break;
- default:
- /* nothing */
- break;
+ case 61: /* Client Identifier */
+ /* We *MAY* use hwtype/hwaddr. If we have 7 bytes, I'll
+ guess that the first is the hwtype, and the last 6
+ are the hw addr */
+ if (vlen == 7) {
+ guint8 htype;
+
+ vti = proto_tree_add_text(bp_tree, tvb, voff,
+ consumed, "Option %d: %s", code, text);
+ v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+ htype = tvb_get_guint8(tvb, voff+2);
+ proto_tree_add_text(v_tree, tvb, voff+2, 1,
+ "Hardware type: %s",
+ arphrdtype_to_str(htype,
+ "Unknown (0x%02x)"));
+ proto_tree_add_text(v_tree, tvb, voff+3, 6,
+ "Client hardware address: %s",
+ arphrdaddr_to_str(tvb_get_ptr(tvb, voff+3, 6),
+ 6, htype));
+ } else {
+ /* otherwise, it's opaque data */
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s (%d bytes)", code, text, vlen);
+ }
+ break;
+
+ case 63: /* NetWare/IP options */
+ vti = proto_tree_add_text(bp_tree, tvb, voff,
+ consumed, "Option %d: %s", code, text);
+ v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+
+ optp = voff+2;
+ while (optp < voff+consumed)
+ optp = dissect_netware_ip_suboption(v_tree, tvb, optp);
+ break;
+
+ case 82: /* Relay Agent Information Option */
+ vti = proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s (%d bytes)",
+ code, text, vlen);
+ v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+ optp = voff+2;
+ while (optp < voff+consumed) {
+ optp = bootp_dhcp_decode_agent_info(v_tree, tvb, optp);
+ }
+ break;
+
+ case 210: /* DHCP Authentication */
+ vti = proto_tree_add_text(bp_tree, tvb, voff,
+ vlen + 2, "Option %d: %s", code, text);
+ v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+ proto_tree_add_text(v_tree, tvb, voff+2, 1, "Protocol: %d",
+ tvb_get_guint8(tvb, voff+2));
+ proto_tree_add_text(v_tree, tvb, voff+3, 1, "Algorithm: %d",
+ tvb_get_guint8(tvb, voff+3));
+ proto_tree_add_text(v_tree, tvb, voff+4, 1, "Replay Detection Method: %d",
+ tvb_get_guint8(tvb, voff+4));
+ /*
+ * XXX:
+ *
+ * 1) this won't compile if you have a compiler that
+ * doesn't support 64-bit integral quantities;
+ *
+ * 2) there is no standard for the printf format to
+ * be used for 64-bit integral quantities, so
+ * this may not display correctly.
+ *
+ * We need to figure out how to handle 64-bit integral
+ * quantities portably, with some form of fallback if
+ * the compiler doesn't support it, and some way of
+ * handling "%ll{d,o,x}" (most platforms) vs. "%q{d,o.x}"
+ * (FreeBSD, perhaps some versions of other BSDs) vs.
+ * "sorry, we're an LP64 platform, %l{d,o,x} is good enough
+ * for you" (Digital UNIX).
+ */
+ proto_tree_add_text(v_tree, tvb, voff+5, 8, "Replay Detection Value: %0llX",
+ tvb_get_ntohll(tvb, voff+5));
+ if (vlen > 11) {
+ proto_tree_add_text(v_tree, tvb, voff+13, 4, "Secret ID: %0X",
+ tvb_get_ntohl(tvb, voff+13));
+ md5_ptr = tvb_get_ptr(tvb, voff+17, 16);
+ for (i=0; i<16; i++)
+ sprintf(&(md5_str[i*3]), "%02X ", (guint8) md5_ptr[i]);
+ md5_str[48] = 0;
+ proto_tree_add_text(v_tree, tvb, voff+17, 16, "HMAC MD5 Hash: %s", md5_str);
+ }
+ break;
+
+ default: /* not special */
+ break;
}
/* Normal cases */
ftype = opt[code].ftype;
switch (ftype) {
- case special:
- return consumed;
- case ipv4:
+ case special:
+ return consumed;
+
+ case ipv4:
+ if (vlen == 4) {
/* one IP address */
- if (vlen == 4) {
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %s", code, text,
- ip_to_str((guint8*)&pd[voff+2]));
- }
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %s", code, text,
+ ip_to_str(tvb_get_ptr(tvb, voff+2, 4)));
+ } else {
/* > 1 IP addresses. Let's make a sub-tree */
- else {
-
- vti = proto_tree_add_text(bp_tree, voff,
- consumed, "Option %d: %s", code, text);
- v_tree = proto_item_add_subtree(vti, ett_bootp_option);
- for (i = voff + 2; i < voff + consumed; i += 4) {
- proto_tree_add_text(v_tree, i, 4, "IP Address: %s",
- ip_to_str((guint8*)&pd[i]));
- }
+ vti = proto_tree_add_text(bp_tree, tvb, voff,
+ consumed, "Option %d: %s", code, text);
+ v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+ for (i = voff + 2; i < voff + consumed; i += 4) {
+ proto_tree_add_text(v_tree, tvb, i, 4, "IP Address: %s",
+ ip_to_str(tvb_get_ptr(tvb, i, 4)));
}
- break;
+ }
+ break;
- case string:
- /* Fix for non null-terminated string supplied by
- * John Lines <John.Lines@aeat.co.uk>
- */
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %.*s", code, text, vlen, &pd[voff+2]);
- break;
+ case string:
+ /* Fix for non null-terminated string supplied by
+ * John Lines <John.Lines@aeat.co.uk>
+ */
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = \"%.*s\"", code, text, vlen,
+ tvb_get_ptr(tvb, voff+2, consumed-2));
+ break;
- case opaque:
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s (%d bytes)",
- code, text, vlen);
- break;
+ case opaque:
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s (%d bytes)",
+ code, text, vlen);
+ break;
- case val_u_short:
- /* one IP address */
- if (vlen == 2) {
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %d", code, text,
- pntohs(&pd[voff+2]));
- }
+ case val_u_short:
+ if (vlen == 2) {
+ /* one u_short */
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %d", code, text,
+ tvb_get_ntohs(tvb, voff+2));
+ } else {
/* > 1 u_short */
- else {
- vti = proto_tree_add_text(bp_tree, voff,
- consumed, "Option %d: %s", code, text);
- v_tree = proto_item_add_subtree(vti, ett_bootp_option);
- for (i = voff + 2; i < voff + consumed; i += 2) {
- proto_tree_add_text(v_tree, i, 4, "Value: %d",
- pntohs(&pd[i]));
- }
+ vti = proto_tree_add_text(bp_tree, tvb, voff,
+ consumed, "Option %d: %s", code, text);
+ v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+ for (i = voff + 2; i < voff + consumed; i += 2) {
+ proto_tree_add_text(v_tree, tvb, i, 4, "Value: %d",
+ tvb_get_ntohs(tvb, i));
}
- break;
+ }
+ break;
- case val_u_long:
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %d", code, text,
- pntohl(&pd[voff+2]));
- break;
+ case val_u_long:
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %d", code, text,
+ tvb_get_ntohl(tvb, voff+2));
+ break;
- case val_u_byte:
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %d", code, text, pd[voff+2]);
- break;
+ case val_u_byte:
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %d", code, text,
+ tvb_get_guint8(tvb, voff+2));
+ break;
- case toggle:
- i = pd[voff+2];
- if (i != 0 && i != 1) {
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = Invalid Value %d", code, text,
- pd[voff+2]);
- }
- else {
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %s", code, text,
- pd[voff+2] == 0 ? "Disabled" : "Enabled");
- }
- break;
+ case toggle:
+ i = tvb_get_guint8(tvb, voff+2);
+ if (i != 0 && i != 1) {
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = Invalid Value %d", code, text,
+ i);
+ } else {
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %s", code, text,
+ i == 0 ? "Disabled" : "Enabled");
+ }
+ break;
- case yes_no:
- i = pd[voff+2];
- if (i != 0 && i != 1) {
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = Invalid Value %d", code, text,
- pd[voff+2]);
- }
- else {
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %s", code, text,
- pd[voff+2] == 0 ? "No" : "Yes");
- }
- break;
+ case yes_no:
+ i = tvb_get_guint8(tvb, voff+2);
+ if (i != 0 && i != 1) {
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = Invalid Value %d", code, text,
+ i);
+ } else {
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %s", code, text,
+ i == 0 ? "No" : "Yes");
+ }
+ break;
- case time_in_secs:
- time_secs = pntohl(&pd[voff+2]);
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s = %s", code, text,
- ((time_secs == 0xffffffff) ?
- "infinity" :
- time_secs_to_str(time_secs)));
- break;
+ case time_in_secs:
+ time_secs = tvb_get_ntohl(tvb, voff+2);
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s = %s", code, text,
+ ((time_secs == 0xffffffff) ?
+ "infinity" :
+ time_secs_to_str(time_secs)));
+ break;
- default:
- proto_tree_add_text(bp_tree, voff, consumed,
- "Option %d: %s (%d bytes)", code, text, vlen);
+ default:
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
+ "Option %d: %s (%d bytes)", code, text, vlen);
}
- }
- else {
- proto_tree_add_text(bp_tree, voff, consumed,
+ } else {
+ proto_tree_add_text(bp_tree, tvb, voff, consumed,
"Unknown Option Code: %d (%d bytes)", code, vlen);
}
return consumed;
}
-void
-dissect_bootp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
+static int
+bootp_dhcp_decode_agent_info(proto_tree *v_tree, tvbuff_t *tvb, int optp)
+{
+ guint8 subopt;
+ guint8 subopt_len;
+
+ subopt = tvb_get_guint8(tvb, optp);
+ subopt_len = tvb_get_guint8(tvb, optp+1);
+ switch (subopt) {
+ case 1:
+ proto_tree_add_text(v_tree, tvb, optp, subopt_len + 2,
+ "Agent Circuit ID (%d bytes)", subopt_len);
+ break;
+ case 2:
+ proto_tree_add_text(v_tree, tvb, optp, subopt_len + 2,
+ "Agent Remote ID (%d bytes)", subopt_len);
+ break;
+ default:
+ proto_tree_add_text(v_tree, tvb, optp, subopt_len + 2,
+ "Unknown agent option: %d", subopt);
+ break;
+ }
+ optp += (subopt_len + 2);
+ return optp;
+}
+
+static int
+dissect_vendor_pxeclient_suboption(proto_tree *v_tree, tvbuff_t *tvb, int optp)
{
- proto_tree *bp_tree;
+ guint8 subopt;
+ guint8 subopt_len;
+ int slask;
+ proto_tree *o43pxeclient_v_tree;
+ proto_item *vti;
+
+ struct o43pxeclient_opt_info {
+ char *text;
+ enum field_type ft;
+ };
+
+ static struct o43pxeclient_opt_info o43pxeclient_opt[]= {
+ /* 0 */ {"nop", special}, /* dummy */
+ /* 1 */ {"PXE mtftp IP", ipv4},
+ /* 2 */ {"PXE mtftp client port", val_u_le_short},
+ /* 3 */ {"PXE mtftp server port",val_u_le_short},
+ /* 4 */ {"PXE mtftp timeout", val_u_byte},
+ /* 5 */ {"PXE mtftp delay", val_u_byte},
+ /* 6 */ {"PXE discovery control", val_u_byte},
+ /*
+ * Correct: b0 (lsb): disable broadcast discovery
+ * b1: disable multicast discovery
+ * b2: only use/accept servers in boot servers
+ * b3: download bootfile without prompt/menu/disc
+ */
+ /* 7 */ {"PXE multicast address", ipv4},
+ /* 8 */ {"PXE boot servers", special},
+ /* 9 */ {"PXE boot menu", special},
+ /* 10 */ {"PXE menu prompt", special},
+ /* 11 */ {"PXE multicast address alloc", special},
+ /* 12 */ {"PXE credential types", special},
+ /* 71 {"PXE boot item", special} */
+ /* 255 {"PXE end options", special} */
+ };
+#define NUM_O43PXECLIENT_SUBOPTS (12)
+
+ subopt = tvb_get_guint8(tvb, optp);
+
+ if (subopt == 0 ) {
+ proto_tree_add_text(v_tree, tvb, optp, 1, "Padding");
+ return (optp+1);
+ } else if (subopt == 255) { /* End Option */
+ proto_tree_add_text(v_tree, tvb, optp, 1, "End PXEClient option");
+ /* Make sure we skip any junk left this option */
+ return (optp+255);
+ }
+
+ subopt_len = tvb_get_guint8(tvb, optp+1);
+
+ if ( subopt == 71 ) { /* 71 {"PXE boot item", special} */
+ /* case special */
+ /* I may need to decode that properly one day */
+ proto_tree_add_text(v_tree, tvb, optp, subopt_len+2,
+ "Suboption %d: %s (%d byte%s)" ,
+ subopt, "PXE boot item",
+ subopt_len, (subopt_len != 1)?"s":"");
+ } else if ( (subopt < 1 ) || (subopt > NUM_O43PXECLIENT_SUBOPTS) ) {
+ proto_tree_add_text(v_tree, tvb, optp, subopt_len+2,
+ "Unknown suboption %d (%d byte%s)", subopt, subopt_len,
+ (subopt_len != 1)?"s":"");
+ } else {
+ switch (o43pxeclient_opt[subopt].ft) {
+
+/* XXX case string:
+ proto_tree_add_text(v_tree, tvb, optp, subopt_len+2,
+ "Suboption %d: %s", subopt, o43pxeclient_opt[subopt].text);
+ break;
+ XXX */
+ case special:
+ /* I may need to decode that properly one day */
+ proto_tree_add_text(v_tree, tvb, optp, subopt_len+2,
+ "Suboption %d: %s (%d byte%s)" ,
+ subopt, o43pxeclient_opt[subopt].text,
+ subopt_len, (subopt_len != 1)?"s":"");
+ break;
+
+ case val_u_le_short:
+ proto_tree_add_text(v_tree, tvb, optp, 4, "Suboption %d: %s = %u",
+ subopt, o43pxeclient_opt[subopt].text,
+ tvb_get_letohs(tvb, optp+2));
+ break;
+
+ case val_u_byte:
+ proto_tree_add_text(v_tree, tvb, optp, 3, "Suboption %d: %s = %u",
+ subopt, o43pxeclient_opt[subopt].text,
+ tvb_get_guint8(tvb, optp+2));
+ break;
+
+ case ipv4:
+ if (subopt_len == 4) {
+ /* one IP address */
+ proto_tree_add_text(v_tree, tvb, optp, 6,
+ "Suboption %d : %s = %s",
+ subopt, o43pxeclient_opt[subopt].text,
+ ip_to_str(tvb_get_ptr(tvb, optp+2, 4)));
+ } else {
+ /* > 1 IP addresses. Let's make a sub-tree */
+ vti = proto_tree_add_text(v_tree, tvb, optp,
+ subopt_len+2, "Suboption %d: %s",
+ subopt, o43pxeclient_opt[subopt].text);
+ o43pxeclient_v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+ for (slask = optp + 2 ; slask < optp+subopt_len; slask += 4) {
+ proto_tree_add_text(o43pxeclient_v_tree, tvb, slask, 4, "IP Address: %s",
+ ip_to_str(tvb_get_ptr(tvb, slask, 4)));
+ }
+ }
+ break;
+ default:
+ proto_tree_add_text(v_tree, tvb, optp, subopt_len+2,"ERROR, please report: Unknown subopt type handler %d", subopt);
+ break;
+ }
+ }
+ optp += (subopt_len + 2);
+ return optp;
+}
+
+static int
+dissect_netware_ip_suboption(proto_tree *v_tree, tvbuff_t *tvb, int optp)
+{
+ guint8 subopt;
+ guint8 subopt_len;
+ int slask;
+ proto_tree *o63_v_tree;
+ proto_item *vti;
+
+ struct o63_opt_info {
+ char *truet;
+ char *falset;
+ enum field_type ft;
+ };
+
+ static struct o63_opt_info o63_opt[]= {
+ /* 0 */ {"","",none},
+ /* 1 */ {"NWIP does not exist on subnet","",string},
+ /* 2 */ {"NWIP exist in options area","",string},
+ /* 3 */ {"NWIP exists in sname/file","",string},
+ /* 4 */ {"NWIP exists, but too big","",string},
+ /* 5 */ {"Broadcast for nearest Netware server","Do NOT Broadcast for nearest Netware server",yes_no},
+ /* 6 */ {"Preferred DSS server","",ipv4},
+ /* 7 */ {"Nearest NWIP server","",ipv4},
+ /* 8 */ {"Autoretries","",val_u_short},
+ /* 9 */ {"Autoretry delay, secs ","",val_u_short},
+ /* 10*/ {"Support NetWare/IP v1.1","Do NOT support NetWare/IP v1.1",yes_no},
+ /* 11*/ {"Primary DSS ", "" , special}
+ };
+
+ subopt = tvb_get_guint8(tvb, optp);
+ if (subopt > NUM_O63_SUBOPTS) {
+ proto_tree_add_text(v_tree, tvb,optp,1,"Unknown suboption %d", subopt);
+ optp++;
+ } else {
+ switch (o63_opt[subopt].ft) {
+
+ case string:
+ proto_tree_add_text(v_tree, tvb, optp, 2, "Suboption %d: %s", subopt, o63_opt[subopt].truet);
+ optp+=2;
+ break;
+
+ case yes_no:
+ if (tvb_get_guint8(tvb, optp+2)==1) {
+ proto_tree_add_text(v_tree, tvb, optp, 3, "Suboption %d: %s", subopt, o63_opt[subopt].truet);
+ } else {
+ proto_tree_add_text(v_tree, tvb, optp, 3, "Suboption %d: %s" , subopt, o63_opt[subopt].falset);
+ }
+ optp+=3;
+ break;
+
+ case special:
+ proto_tree_add_text(v_tree, tvb, optp, 6,
+ "Suboption %d: %s = %s" ,
+ subopt, o63_opt[subopt].truet,
+ ip_to_str(tvb_get_ptr(tvb, optp+2, 4)));
+ optp=optp+6;
+ break;
+
+ case val_u_short:
+ proto_tree_add_text(v_tree, tvb, optp, 3, "Suboption %d: %s = %u",
+ subopt, o63_opt[subopt].truet,
+ tvb_get_guint8(tvb, optp+2)); /* XXX - 1 byte? */
+ optp+=3;
+ break;
+
+ case ipv4:
+ subopt_len = tvb_get_guint8(tvb, optp+1);
+ if (subopt_len == 4) {
+ /* one IP address */
+ proto_tree_add_text(v_tree, tvb, optp, 6,
+ "Suboption %d : %s = %s",
+ subopt, o63_opt[subopt].truet,
+ ip_to_str(tvb_get_ptr(tvb, optp+2, 4)));
+ optp=optp+6;
+ } else {
+ /* > 1 IP addresses. Let's make a sub-tree */
+ vti = proto_tree_add_text(v_tree, tvb, optp,
+ subopt_len+2, "Suboption %d: %s",
+ subopt, o63_opt[subopt].truet);
+ o63_v_tree = proto_item_add_subtree(vti, ett_bootp_option);
+ for (slask = optp + 2 ; slask < optp+subopt_len; slask += 4) {
+ proto_tree_add_text(o63_v_tree, tvb, slask, 4, "IP Address: %s",
+ ip_to_str(tvb_get_ptr(tvb, slask, 4)));
+ }
+ optp=slask;
+ }
+ break;
+ default:
+ proto_tree_add_text(v_tree, tvb,optp,1,"Unknown suboption %d", subopt);
+ optp++;
+ break;
+ }
+ }
+ return optp;
+}
+
+#define BOOTREQUEST 1
+#define BOOTREPLY 2
+
+static const value_string op_vals[] = {
+ { BOOTREQUEST, "Boot Request" },
+ { BOOTREPLY, "Boot Reply" },
+ { 0, NULL }
+};
+
+static void
+dissect_bootp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+ proto_tree *bp_tree = NULL;
proto_item *ti;
- int voff, eoff; /* vender offset, end offset */
+ guint8 op;
+ guint8 htype, hlen;
+ const guint8 *haddr;
+ int voff, eoff, tmpvoff; /* vendor offset, end offset */
guint32 ip_addr;
+ const char *dhcp_type = NULL;
+ const guint8 *vendor_class_id = NULL;
+
+ if (check_col(pinfo->fd, COL_PROTOCOL))
+ col_set_str(pinfo->fd, COL_PROTOCOL, "BOOTP");
+ if (check_col(pinfo->fd, COL_INFO)) {
+ /*
+ * In case we throw an exception fetching the opcode, etc.
+ */
+ col_clear(pinfo->fd, COL_INFO);
+ }
- if (check_col(fd, COL_PROTOCOL))
- col_add_str(fd, COL_PROTOCOL, "BOOTP");
+ op = tvb_get_guint8(tvb, 0);
+ htype = tvb_get_guint8(tvb, 1);
+ hlen = tvb_get_guint8(tvb, 2);
+ if (check_col(pinfo->fd, COL_INFO)) {
+ switch (op) {
- if (check_col(fd, COL_INFO)) {
- if (pd[offset] == 1) {
- col_add_fstr(fd, COL_INFO, "Boot Request from %s",
- arphrdaddr_to_str((guint8*)&pd[offset+28],
- pd[offset+2], pd[offset+1]));
- }
- else {
- col_add_str(fd, COL_INFO, "Boot Reply");
+ case BOOTREQUEST:
+ col_add_fstr(pinfo->fd, COL_INFO, "Boot Request from %s",
+ arphrdaddr_to_str(tvb_get_ptr(tvb, 28, hlen),
+ hlen, htype));
+ break;
+
+ case BOOTREPLY:
+ col_set_str(pinfo->fd, COL_INFO, "Boot Reply");
+ break;
+
+ default:
+ col_add_fstr(pinfo->fd, COL_INFO, "Unknown BOOTP message type (%u)",
+ op);
+ break;
}
}
if (tree) {
- ti = proto_tree_add_item(tree, proto_bootp, offset, END_OF_FRAME, NULL);
+ ti = proto_tree_add_item(tree, proto_bootp, tvb, 0,
+ tvb_length(tvb), FALSE);
bp_tree = proto_item_add_subtree(ti, ett_bootp);
- proto_tree_add_uint_format(bp_tree, hf_bootp_type,
- offset, 1,
- pd[offset],
- pd[offset] == 1 ?
- "Boot Request" : "Boot Reply");
- proto_tree_add_uint_format(bp_tree, hf_bootp_hw_type,
- offset + 1, 1,
- pd[offset+1],
+ proto_tree_add_uint(bp_tree, hf_bootp_type, tvb,
+ 0, 1,
+ op);
+ proto_tree_add_uint_format(bp_tree, hf_bootp_hw_type, tvb,
+ 1, 1,
+ htype,
"Hardware type: %s",
- arphrdtype_to_str(pd[offset+1],
+ arphrdtype_to_str(htype,
"Unknown (0x%02x)"));
- proto_tree_add_item(bp_tree, hf_bootp_hw_len,
- offset + 2, 1, pd[offset+2]);
- proto_tree_add_item(bp_tree, hf_bootp_hops,
- offset + 3, 1, pd[offset+3]);
- proto_tree_add_item(bp_tree, hf_bootp_id,
- offset + 4, 4, pntohl(&pd[offset+4]));
- proto_tree_add_item(bp_tree, hf_bootp_secs,
- offset + 8, 2, pntohs(&pd[offset+8]));
- proto_tree_add_item(bp_tree, hf_bootp_flag,
- offset + 10, 2, pd[offset+10] & 1);
-
- memcpy(&ip_addr, &pd[offset+12], sizeof(ip_addr));
- proto_tree_add_item(bp_tree, hf_bootp_ip_client,
- offset + 12, 4, ip_addr);
- memcpy(&ip_addr, &pd[offset+16], sizeof(ip_addr));
- proto_tree_add_item(bp_tree, hf_bootp_ip_your,
- offset + 16, 4, ip_addr);
- memcpy(&ip_addr, &pd[offset+20], sizeof(ip_addr));
- proto_tree_add_item(bp_tree, hf_bootp_ip_server,
- offset + 20, 4, ip_addr);
- memcpy(&ip_addr, &pd[offset+24], sizeof(ip_addr));
- proto_tree_add_item(bp_tree, hf_bootp_ip_relay,
- offset + 24, 4, ip_addr);
-
- proto_tree_add_bytes_format(bp_tree, hf_bootp_hw_addr,
- offset + 28, pd[offset+2],
- &pd[offset+28],
- "Client hardware address: %s",
- arphrdaddr_to_str((guint8*)&pd[offset+28],
- pd[offset+2], pd[offset+1]));
+ proto_tree_add_uint(bp_tree, hf_bootp_hw_len, tvb,
+ 2, 1, hlen);
+ proto_tree_add_item(bp_tree, hf_bootp_hops, tvb,
+ 3, 1, FALSE);
+ proto_tree_add_item(bp_tree, hf_bootp_id, tvb,
+ 4, 4, FALSE);
+ proto_tree_add_item(bp_tree, hf_bootp_secs, tvb,
+ 8, 2, FALSE);
+ proto_tree_add_uint(bp_tree, hf_bootp_flag, tvb,
+ 10, 2, tvb_get_ntohs(tvb, 10) & 0x8000);
+
+ proto_tree_add_item(bp_tree, hf_bootp_ip_client, tvb,
+ 12, 4, FALSE);
+ proto_tree_add_item(bp_tree, hf_bootp_ip_your, tvb,
+ 16, 4, FALSE);
+ proto_tree_add_item(bp_tree, hf_bootp_ip_server, tvb,
+ 20, 4, FALSE);
+ proto_tree_add_item(bp_tree, hf_bootp_ip_relay, tvb,
+ 24, 4, FALSE);
+
+ if (hlen > 0) {
+ haddr = tvb_get_ptr(tvb, 28, hlen);
+ proto_tree_add_bytes_format(bp_tree, hf_bootp_hw_addr, tvb,
+ 28, hlen,
+ haddr,
+ "Client hardware address: %s",
+ arphrdaddr_to_str(haddr,
+ hlen,
+ htype));
+ }
+ else {
+ proto_tree_add_text(bp_tree, tvb,
+ 28, 0, "Client address not given");
+ }
/* The server host name is optional */
- if (pd[offset+44]) {
- proto_tree_add_string_format(bp_tree, hf_bootp_server,
- offset + 44, 64,
- &pd[offset+44],
- "Server host name: %s",
- &pd[offset+44]);
+ if (tvb_get_guint8(tvb, 44) != '\0') {
+ proto_tree_add_item(bp_tree, hf_bootp_server, tvb,
+ 44, 64, FALSE);
}
else {
- proto_tree_add_string_format(bp_tree, hf_bootp_server,
- offset + 44, 64,
- &pd[offset+44],
+ proto_tree_add_string_format(bp_tree, hf_bootp_server, tvb,
+ 44, 64,
+ tvb_get_ptr(tvb, 44, 1),
"Server host name not given");
}
/* Boot file */
- if (pd[offset+108]) {
- proto_tree_add_string_format(bp_tree, hf_bootp_file,
- offset + 108, 128,
- &pd[offset+108],
- "Boot file name: %s",
- &pd[offset+108]);
+ if (tvb_get_guint8(tvb, 108) != '\0') {
+ proto_tree_add_item(bp_tree, hf_bootp_file, tvb,
+ 108, 128, FALSE);
}
else {
- proto_tree_add_string_format(bp_tree, hf_bootp_file,
- offset + 108, 128,
- &pd[offset+108],
+ proto_tree_add_string_format(bp_tree, hf_bootp_file, tvb,
+ 108, 128,
+ tvb_get_ptr(tvb, 108, 1),
"Boot file name not given");
}
- if (pntohl(&pd[offset+236]) == 0x63825363) {
- proto_tree_add_ipv4_format(bp_tree, hf_bootp_cookie,
- offset + 236, 4,
- pd[offset+236],
- "Magic cookie: (OK)");
+ tvb_memcpy(tvb, (void *)&ip_addr, 236, sizeof(ip_addr));
+ if (tvb_get_ntohl(tvb, 236) == 0x63825363) {
+ proto_tree_add_ipv4_format(bp_tree, hf_bootp_cookie, tvb,
+ 236, 4, ip_addr,
+ "Magic cookie: (OK)");
}
else {
- memcpy(&ip_addr, &pd[offset + 236], sizeof(ip_addr));
- proto_tree_add_item(bp_tree, hf_bootp_cookie,
- offset + 236, 4, ip_addr);
+ proto_tree_add_ipv4(bp_tree, hf_bootp_cookie, tvb,
+ 236, 4, ip_addr);
}
+ }
- voff = offset+240;
- eoff = pi.captured_len;
+ voff = 240;
+ eoff = tvb_reported_length(tvb);
+
+ /*
+ * In the first pass, we just look for the DHCP message type
+ * and Vendor class identifier options.
+ */
+ tmpvoff = voff;
+ while (tmpvoff < eoff) {
+ tmpvoff += bootp_option(tvb, 0, tmpvoff, eoff, TRUE,
+ &dhcp_type, &vendor_class_id);
+ }
- while (voff < eoff) {
- voff += bootp_option(pd, bp_tree, voff, eoff);
- }
+ /*
+ * If there was a DHCP message type option, flag this packet
+ * as DHCP.
+ */
+ if (dhcp_type != NULL) {
+ /*
+ * Yes, this is a DHCP packet, and "dhcp_type" is the
+ * packet type.
+ */
+ if (check_col(pinfo->fd, COL_PROTOCOL))
+ col_set_str(pinfo->fd, COL_PROTOCOL, "DHCP");
+ if (check_col(pinfo->fd, COL_INFO))
+ col_add_fstr(pinfo->fd, COL_INFO, "DHCP %-8s - Transaction ID 0x%x",
+ dhcp_type, tvb_get_ntohl(tvb, 4));
+ if (tree)
+ proto_tree_add_boolean_hidden(bp_tree, hf_bootp_dhcp,
+ tvb, 0, 0, 1);
+ }
+
+ /*
+ * If we're not building the protocol tree, we don't need to
+ * make a second pass.
+ */
+ if (tree == NULL)
+ return;
+
+ /*
+ * OK, now build the protocol tree.
+ */
+ while (voff < eoff) {
+ voff += bootp_option(tvb, bp_tree, voff, eoff, FALSE,
+ &dhcp_type, &vendor_class_id);
}
}
proto_register_bootp(void)
{
static hf_register_info hf[] = {
+ { &hf_bootp_dhcp,
+ { "Frame is DHCP", "bootp.dhcp", FT_BOOLEAN,
+ BASE_NONE, NULL, 0x0,
+ "", HFILL }},
+
{ &hf_bootp_type,
- { "Message type", "bootp.type", FT_UINT8, BASE_NONE, NULL, 0x0,
- "" }},
+ { "Message type", "bootp.type", FT_UINT8,
+ BASE_DEC, VALS(op_vals), 0x0,
+ "", HFILL }},
{ &hf_bootp_hw_type,
- { "Hardware type", "bootp.hw.type", FT_UINT8, BASE_HEX, NULL, 0x0,
- "" }},
+ { "Hardware type", "bootp.hw.type", FT_UINT8,
+ BASE_HEX, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_hw_len,
- { "Hardware address length", "bootp.hw.len", FT_UINT8, BASE_DEC, NULL, 0x0,
- "" }},
+ { "Hardware address length", "bootp.hw.len", FT_UINT8,
+ BASE_DEC, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_hops,
- { "Hops", "bootp.hops", FT_UINT8, BASE_DEC, NULL, 0x0,
- "" }},
+ { "Hops", "bootp.hops", FT_UINT8,
+ BASE_DEC, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_id,
- { "Transaction ID", "bootp.id", FT_UINT32, BASE_HEX, NULL, 0x0,
- "" }},
+ { "Transaction ID", "bootp.id", FT_UINT32,
+ BASE_HEX, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_secs,
- { "Seconds elapsed", "bootp.secs", FT_UINT16, BASE_DEC, NULL, 0x0,
- "" }},
+ { "Seconds elapsed", "bootp.secs", FT_UINT16,
+ BASE_DEC, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_flag,
- { "Broadcast flag", "bootp.flag", FT_UINT16, BASE_DEC, NULL, 0x0,
- "" }},
+ { "Broadcast flag", "bootp.flag", FT_UINT16,
+ BASE_HEX, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_ip_client,
- { "Client IP address", "bootp.ip.client",FT_IPv4, BASE_NONE, NULL, 0x0,
- "" }},
+ { "Client IP address", "bootp.ip.client",FT_IPv4,
+ BASE_NONE, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_ip_your,
- { "Your (client) IP address", "bootp.ip.your", FT_IPv4, BASE_NONE, NULL, 0x0,
- "" }},
+ { "Your (client) IP address", "bootp.ip.your", FT_IPv4,
+ BASE_NONE, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_ip_server,
- { "Next server IP address", "bootp.ip.server",FT_IPv4, BASE_NONE, NULL, 0x0,
- "" }},
+ { "Next server IP address", "bootp.ip.server",FT_IPv4,
+ BASE_NONE, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_ip_relay,
- { "Relay agent IP address", "bootp.ip.relay", FT_IPv4, BASE_NONE, NULL, 0x0,
- "" }},
+ { "Relay agent IP address", "bootp.ip.relay", FT_IPv4,
+ BASE_NONE, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_hw_addr,
- { "Client hardware address", "bootp.hw.addr", FT_BYTES, BASE_NONE, NULL, 0x0,
- "" }},
+ { "Client hardware address", "bootp.hw.addr", FT_BYTES,
+ BASE_NONE, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_server,
- { "Server host name", "bootp.server", FT_STRING, BASE_NONE, NULL, 0x0,
- "" }},
+ { "Server host name", "bootp.server", FT_STRING,
+ BASE_NONE, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_file,
- { "Boot file name", "bootp.file", FT_STRING, BASE_NONE, NULL, 0x0,
- "" }},
+ { "Boot file name", "bootp.file", FT_STRING,
+ BASE_NONE, NULL, 0x0,
+ "", HFILL }},
{ &hf_bootp_cookie,
- { "Magic cookie", "bootp.cookie", FT_IPv4, BASE_NONE, NULL, 0x0,
- "" }},
+ { "Magic cookie", "bootp.cookie", FT_IPv4,
+ BASE_NONE, NULL, 0x0,
+ "", HFILL }},
};
static gint *ett[] = {
&ett_bootp,
&ett_bootp_option,
};
- proto_bootp = proto_register_protocol("Bootstrap Protocol", "bootp");
+ proto_bootp = proto_register_protocol("Bootstrap Protocol", "BOOTP/DHCP",
+ "bootp");
proto_register_field_array(proto_bootp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
+
+void
+proto_reg_handoff_bootp(void)
+{
+ dissector_add("udp.port", UDP_PORT_BOOTPS, dissect_bootp, proto_bootp);
+}
git.samba.org / obnox / wireshark / wip.git / blobdiff