diff options
Diffstat (limited to 'packet-mip.c')
| -rw-r--r-- | packet-mip.c | 258 |
1 files changed, 170 insertions, 88 deletions
diff --git a/packet-mip.c b/packet-mip.c index 1c0bf06fde..c94c838328 100644 --- a/packet-mip.c +++ b/packet-mip.c @@ -1,8 +1,8 @@ /* packet-mip.c * Routines for Mobile IP dissection - * Copyright 2000, Stefan Raab <Stefan.Raab@nextel.com> + * Copyright 2000, Stefan Raab <sraab@cisco.com> * - * $Id: packet-mip.c,v 1.13 2001/01/25 06:14:14 guy Exp $ + * $Id: packet-mip.c,v 1.14 2001/02/14 17:01:43 gram Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs <gerald@unicom.net> @@ -40,6 +40,7 @@ #include <string.h> #include <glib.h> +#include <time.h> #ifdef NEED_SNPRINTF_H # include "snprintf.h" @@ -62,42 +63,19 @@ static int hf_mip_homeaddr = -1; static int hf_mip_haaddr = -1; static int hf_mip_coa = -1; static int hf_mip_ident = -1; +static int hf_mip_ext_type = -1; +static int hf_mip_ext_len = -1; +static int hf_mip_aext_spi = -1; +static int hf_mip_aext_auth = -1; +static int hf_mip_next_nai = -1; /* Initialize the subtree pointers */ static gint ett_mip = -1; +static gint ett_mip_ext = -1; /* Port used for Mobile IP */ #define UDP_PORT_MIP 434 - - -/* -struct mip_packet{ - unsigned char type; -}; - - -struct mip_request_packet{ - unsigned char type; - unsigned char code; - unsigned char life[2]; - unsigned char homeaddr[4]; - unsigned char haaddr[4]; - unsigned char coa[4]; - unsigned char ident[8]; - -}; - - -struct mip_reply_packet{ - unsigned char type; - unsigned char code; - unsigned char life[2]; - unsigned char homeaddr[4]; - unsigned char haaddr[4]; - unsigned char ident[8]; - -}; -*/ +#define NTP_BASETIME 2208988800ul static const value_string mip_types[] = { {1, "Registration Request"}, @@ -106,57 +84,73 @@ static const value_string mip_types[] = { }; static const value_string mip_reply_codes[]= { - {0, "Registration Accepted"}, - {1, "Registration Accepted, no simul bindings"}, - {64, "Registration Denied by FA, unspecified reason"}, - {65, "Registration Denied by FA, Admin Prohibit"}, - {66, "Registration Denied by FA, Insufficient Resources"}, - {67, "Registration Denied by FA, MN failed Auth"}, - {68, "Registration Denied by FA, HA failed Auth"}, - {69, "Registration Denied by FA, Lifetime to long"}, - {70, "Registration Denied by FA, Poorly Formed Request"}, - {71, "Registration Denied by FA, Poorly Formed Reply"}, - {72, "Registration Denied by FA, encap unavailable"}, - {73, "Registration Denied by FA, VJ unavailable"}, - {80, "Registration Denied by FA, Home net unreachable"}, - {81, "Registration Denied by FA, Home Agent host unreachable"}, - {82, "Registration Denied by FA, Home Agent port unreachable"}, - {88, "Registration Denied by FA, Home Agent unreachable"}, - {128, "Registration Denied by HA, unspecified"}, - {129, "Registration Denied by HA, Admin Prohibit"}, - {130, "Registration Denied by HA, insufficient resources"}, - {131, "Registration Denied by HA, MN failed Auth"}, - {132, "Registration Denied by HA, FA failed Auth"}, - {133, "Registration Denied by HA, registration ID Mismatch"}, - {134, "Registration Denied by HA, poorly formed request"}, - {135, "Registration Denied by HA, too many simul bindings"}, - {136, "Registration Denied by HA, unknown HA address"}, + {0, "Reg Accepted"}, + {1, "Reg Accepted, but Simultaneous Bindings Unsupported."}, + {64, "Reg Deny (FA)- Unspecified Reason"}, + {65, "Reg Deny (FA)- Administratively Prohibited"}, + {66, "Reg Deny (FA)- Insufficient Resources"}, + {67, "Reg Deny (FA)- MN failed Authentication"}, + {68, "Reg Deny (FA)- HA failed Authentication"}, + {69, "Reg Deny (FA)- Requested Lifetime too Long"}, + {70, "Reg Deny (FA)- Poorly Formed Request"}, + {71, "Reg Deny (FA)- Poorly Formed Reply"}, + {72, "Reg Deny (FA)- Requested Encapsulation Unavailable"}, + {73, "Reg Deny (FA)- VJ Compression Unavailable"}, + {80, "Reg Deny (FA)- Home Network Unreachable"}, + {81, "Reg Deny (FA)- HA Host Unreachable"}, + {82, "Reg Deny (FA)- HA Port Unreachable"}, + {88, "Reg Deny (FA)- HA Unreachable"}, + {96, "Reg Deny (FA)(NAI) - Non Zero Home Address Required"}, + {97, "Reg Deny (FA)(NAI) - Missing NAI"}, + {98, "Reg Deny (FA)(NAI) - Missing Home Agent"}, + {99, "Reg Deny (FA)(NAI) - Missing Home Address"}, + {128, "Reg Deny (HA)- Unspecified"}, + {129, "Reg Deny (HA)- Administratively Prohibited"}, + {130, "Reg Deny (HA)- Insufficient Resources"}, + {131, "Reg Deny (HA)- MN Failed Authentication"}, + {132, "Reg Deny (HA)- FA Failed Authentication"}, + {133, "Reg Deny (HA)- Registration ID Mismatch"}, + {134, "Reg Deny (HA)- Poorly Formed Request"}, + {135, "Reg Deny (HA)- Too Many Simultaneous Bindings"}, + {136, "Reg Deny (HA)- Unknown HA Address"}, + {0, NULL}, +}; + +static const value_string mip_ext_types[]= { + {32, "Mobile-Home Authentication Extension"}, + {33, "Mobile-Foreign Authentication Extension"}, + {34, "Foreign-Home Authentication Extension"}, + {131, "Mobile Node NAI Extension"}, {0, NULL}, }; /* Code to actually dissect the packets */ static void -dissect_mip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +dissect_mip( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { /* Set up structures we will need to add the protocol subtree and manage it */ proto_item *ti; - proto_tree *mip_tree; + proto_tree *mip_tree=NULL, *ext_tree=NULL; guint8 type, code; + struct timeval ident_time; + int eoffset, elen; + + CHECK_DISPLAY_AS_DATA(proto_mip, tvb, pinfo, tree); /* Make entries in Protocol column and Info column on summary display */ - if (check_col(pinfo->fd, COL_PROTOCOL)) - col_set_str(pinfo->fd, COL_PROTOCOL, "Mobile IP"); - if (check_col(pinfo->fd, COL_INFO)) - col_clear(pinfo->fd, COL_INFO); + pinfo->current_proto = "Mobile IP"; + if (check_col(pinfo->fd, COL_PROTOCOL)) + col_set_str(pinfo->fd, COL_PROTOCOL, "MobileIP"); type = tvb_get_guint8(tvb, 0); if (type==1) { if (check_col(pinfo->fd, COL_INFO)) - col_set_str(pinfo->fd, COL_INFO, "Mobile IP Registration Request"); + col_add_fstr(pinfo->fd, COL_INFO, "Reg Request: HAddr=%s COA=%s", + ip_to_str(tvb_get_ptr(tvb, 4, 4)), ip_to_str(tvb_get_ptr(tvb,12,4))); if (tree) { ti = proto_tree_add_item(tree, proto_mip, tvb, 0, tvb_length(tvb), FALSE); @@ -170,31 +164,96 @@ dissect_mip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) proto_tree_add_boolean(mip_tree, hf_mip_m, tvb, 1, 1, code); proto_tree_add_boolean(mip_tree, hf_mip_g, tvb, 1, 1, code); proto_tree_add_boolean(mip_tree, hf_mip_v, tvb, 1, 1, code); - - proto_tree_add_int(mip_tree, hf_mip_life, tvb, 2, 2, tvb_get_ntohs(tvb, 2)); - proto_tree_add_ipv4(mip_tree, hf_mip_homeaddr, tvb, 4, 4, tvb_get_letohl(tvb, 4)); - proto_tree_add_ipv4(mip_tree, hf_mip_haaddr, tvb, 8, 4, tvb_get_letohl(tvb, 8)); - proto_tree_add_ipv4(mip_tree, hf_mip_coa, tvb, 12, 4, tvb_get_letohl(tvb, 12)); - proto_tree_add_bytes(mip_tree, hf_mip_ident, tvb, 16, 8, tvb_get_ptr(tvb, 16, 8)); + + proto_tree_add_item(mip_tree, hf_mip_life, tvb, 2, 2, FALSE); + proto_tree_add_item(mip_tree, hf_mip_homeaddr, tvb, 4, 4, FALSE); + proto_tree_add_item(mip_tree, hf_mip_haaddr, tvb, 8, 4, FALSE); + proto_tree_add_item(mip_tree, hf_mip_coa, tvb, 12, 4, FALSE); + ident_time.tv_sec = tvb_get_ntohl(tvb,16)-(guint32) NTP_BASETIME; + ident_time.tv_usec = tvb_get_ntohl(tvb,20); + proto_tree_add_time(mip_tree, hf_mip_ident, tvb, 16, 8, &ident_time); + + eoffset = 24; + while (eoffset < tvb_length(tvb)) { /* Registration Extensions */ + if (eoffset ==24) { + ti = proto_tree_add_text(mip_tree, tvb, 24, tvb_length(tvb)-24, "Extensions"); + ext_tree = proto_item_add_subtree(ti, ett_mip_ext); + } + + proto_tree_add_item(ext_tree, hf_mip_ext_type, tvb, eoffset, 1, FALSE); + elen = tvb_get_guint8(tvb, eoffset+1); + proto_tree_add_int(ext_tree, hf_mip_ext_len, tvb, eoffset+1, 1, elen); + + switch (tvb_get_guint8(tvb, eoffset)) { + case 32 ... 34: + proto_tree_add_item(ext_tree, hf_mip_aext_spi, tvb, eoffset+2, 4, FALSE); + proto_tree_add_item(ext_tree, hf_mip_aext_auth, tvb, eoffset+6, elen-4, FALSE); + break; + case 131: + proto_tree_add_string(ext_tree, hf_mip_next_nai, tvb, eoffset+2, + tvb_get_guint8(tvb, eoffset+1), + tvb_get_ptr(tvb, eoffset+2,tvb_get_guint8(tvb, eoffset+1))); + break; + default: + proto_tree_add_text(ext_tree, tvb, eoffset + 2, tvb_get_guint8(tvb, eoffset+1), + "Unknown Extension"); + break; + + } + eoffset += tvb_get_guint8(tvb, eoffset+1) + 2; + } } } - + if (type==3){ if (check_col(pinfo->fd, COL_INFO)) - col_set_str(pinfo->fd, COL_INFO, "Mobile IP Registration Reply"); - + col_add_fstr(pinfo->fd, COL_INFO, "Reg Reply: HAddr=%s, Code=%u", + ip_to_str(tvb_get_ptr(tvb,4,4)), tvb_get_guint8(tvb,1)); + if (tree) { ti = proto_tree_add_item(tree, proto_mip, tvb, 0, tvb_length(tvb), FALSE); - mip_tree = proto_item_add_subtree(ti, ett_mip); + mip_tree = proto_item_add_subtree(ti, ett_mip); proto_tree_add_int(mip_tree, hf_mip_type, tvb, 0, 1, type); - - code = tvb_get_guint8(tvb, 1); - proto_tree_add_uint(mip_tree, hf_mip_code, tvb, 1, 1, code); - proto_tree_add_int(mip_tree, hf_mip_life, tvb, 2, 2, tvb_get_ntohs(tvb, 2)); - proto_tree_add_ipv4(mip_tree, hf_mip_homeaddr, tvb, 4, 4, tvb_get_letohl(tvb, 4)); - proto_tree_add_ipv4(mip_tree, hf_mip_haaddr, tvb, 8, 4, tvb_get_letohl(tvb, 8)); - proto_tree_add_bytes(mip_tree, hf_mip_ident, tvb, 12, 8, tvb_get_ptr(tvb, 12, 8)); + + /* code = tvb_get_guint8(tvb, 1); + proto_tree_add_uint(mip_tree, hf_mip_code, tvb, 1, 1, code);*/ + proto_tree_add_item(mip_tree, hf_mip_code, tvb, 1, 1, FALSE); + proto_tree_add_item(mip_tree, hf_mip_life, tvb, 2, 2, FALSE); + proto_tree_add_item(mip_tree, hf_mip_homeaddr, tvb, 4, 4, FALSE); + proto_tree_add_item(mip_tree, hf_mip_haaddr, tvb, 8, 4, FALSE); + ident_time.tv_sec = tvb_get_ntohl(tvb,12)-(guint32) NTP_BASETIME; + ident_time.tv_usec = tvb_get_ntohl(tvb,16); + proto_tree_add_time(mip_tree, hf_mip_ident, tvb, 12, 8, &ident_time); + + eoffset = 20; + while (eoffset < tvb_length(tvb)) { /* Registration Extensions */ + if (eoffset==20) { + ti = proto_tree_add_text(mip_tree, tvb, 20, tvb_length(tvb)-20, "Extensions"); + ext_tree = proto_item_add_subtree(ti, ett_mip_ext); + } + + proto_tree_add_int(ext_tree, hf_mip_ext_type, tvb, eoffset, 1, + tvb_get_guint8(tvb, eoffset)); + elen = tvb_get_guint8(tvb, eoffset+1); + proto_tree_add_int(ext_tree, hf_mip_ext_len, tvb, eoffset+1, 1, elen); + + switch (tvb_get_guint8(tvb, eoffset)) { + case 32 ... 34: + proto_tree_add_item(ext_tree, hf_mip_aext_spi, tvb, eoffset+2, 4, FALSE); + proto_tree_add_item(ext_tree, hf_mip_aext_auth, tvb, eoffset+6, elen-4, FALSE); + break; + case 131: + proto_tree_add_item(ext_tree, hf_mip_next_nai, tvb, eoffset+2, + tvb_get_guint8(tvb, eoffset+1), FALSE); + break; + default: + proto_tree_add_text(ext_tree, tvb, eoffset + 2, tvb_get_guint8(tvb, eoffset+1), + "Unknown Extension"); + break; + } + eoffset += tvb_get_guint8(tvb, eoffset+1) + 2; + } } } } @@ -212,6 +271,7 @@ void proto_register_mip(void) }, { &hf_mip_s, {"Simultaneous Bindings", "mip.s", + FT_BOOLEAN, 8, NULL, 128, "Simultaneous Bindings Allowed" } }, @@ -247,7 +307,7 @@ void proto_register_mip(void) }, { &hf_mip_life, { "Lifetime", "mip.life", - FT_INT16, BASE_DEC, NULL, 0, + FT_UINT16, BASE_DEC, NULL, 0, "Mobile IP Lifetime." } }, { &hf_mip_homeaddr, @@ -268,18 +328,40 @@ void proto_register_mip(void) }, { &hf_mip_ident, { "Identification", "mip.ident", - FT_BYTES, BASE_NONE, NULL, 0, + FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0, "MN Identification." } }, - - - - + { &hf_mip_ext_type, + { "Extension Type", "mip.ext.type", + FT_INT8, BASE_DEC, VALS(mip_ext_types), 0, + "Mobile IP Extension Type." } + }, + { &hf_mip_ext_len, + { "Extension Length", "mip.ext.len", + FT_INT8, BASE_DEC, NULL, 0, + "Mobile IP Extension Length."} + }, + { &hf_mip_aext_spi, + { "SPI", "mip.auth.spi", + FT_INT32, BASE_HEX, NULL, 0, + "Authentication Header Security Parameter Index."} + }, + { &hf_mip_aext_auth, + { "Authenticator", "mip.auth.auth", + FT_BYTES, BASE_NONE, NULL, 0, + "Authenticator."} + }, + { &hf_mip_next_nai, + { "NAI", "mip.nai", + FT_STRING, BASE_NONE, NULL, 0, + "NAI"} + }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_mip, + &ett_mip_ext, }; /* Register the protocol name and description */ @@ -293,5 +375,5 @@ void proto_register_mip(void) void proto_reg_handoff_mip(void) { - dissector_add("udp.port", UDP_PORT_MIP, dissect_mip, proto_mip); + dissector_add("udp.port", UDP_PORT_MIP, dissect_mip, proto_mip); } |