epan/dissectors/packet-ipos.c

   1 /* packet-ipos.c
   2  * Routines for IPOS dissection
   3  * Copyright 2015, Chuan He <chuan.he@ericsson.com>
   4  *                 Anders Broman <anders.broman@ericsson.com>
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * SPDX-License-Identifier: GPL-2.0-or-later
  11  */
  12
  13 /*
  14  * This is a dissector for Ericsson IPOS Linux kernel packets' header
  15  * exchanged between kernel and linecard. All fields are in network byte order.
  16  * This header follow the Linux cooked-mode capture(SLL) and will call REDBACK
  17  * dissector.
  18  *
  19  * IPOS is the network operating system running on a few Ericsson platforms
  20  * including SSR 8000 routers, Router 6000 series, and SP routers.
  21  *
  22  * Product details for Ericsson's IP Metro and Backhaul routers using IPOS:
  23  * http://www.ericsson.com/ourportfolio/products/ip-metro-and-backhaul
  24  *
  25  */
  26 #include "config.h"
  27 #include <epan/packet.h>
  28 #include <epan/expert.h>
  29
  30 void proto_reg_handoff_ipos(void);
  31 void proto_register_ipos(void);
  32
  33 static dissector_handle_t ipos_handle;
  34 static dissector_handle_t redback_handle;
  35
  36 static int proto_ipos;
  37 static int hf_ipos_protocol;
  38 static int hf_ipos_priority;
  39 static int hf_ipos_ppe;
  40 static int hf_ipos_slot;
  41 static int ett_ipos;
  42
  43 /* static expert_field ei_ipos_protocol; */
  44
  45 #define LINUX_SLL_P_IPOS_NETIPC  0x0030 /* IPOS IPC frames to/from AF_IPC module */
  46 #define LINUX_SLL_P_IPOS_RBN     0x0031  /* IPOS IP frames to/from CTX module */
  47 #define LINUX_SLL_P_IPOS_NETLINK 0x0032 /* IPOS data frames to/from AF_RBN_NETLINK module */
  48 #define LINUX_SLL_P_IPOS_XCRP    0x0033 /* IPOS data frames to/from XCRP driver */
  49 #define LINUX_SLL_P_IPOS_ISIS    0x0034 /* IPOS data frames to/from ISIS module */
  50 #define LINUX_SLL_P_IPOS_PAKIO   0x0035 /* IPOS data frames to/from AF_RBN_PAKIO module */
  51
  52 static const value_string prototypenames[] = {
  53     { 0, "L2 Protocol" },
  54     { 1, "L3 Protocol" },
  55     { 2, "Control (IPC) message" },
  56     { 3, "ISIS packet" },
  57     { 4, "PAKIO packet" },
  58     { 0,  NULL }
  59 };
  60
  61 static const value_string ppetypenames[] = {
  62     { 4,  "Output PPA" },
  63     { 6,  "Input PPA" },
  64     { 10, "SPPA" },
  65     { 0,   NULL }
  66 };
  67
  68 /**
  69  *   Dissect a buffer containing IPOS kernel packet bit string.
  70  *
  71  *   @param tvb   The buffer to dissect.
  72  *   @param pinfo Packet Info.
  73  *   @param tree  The protocol tree.
  74  **/
  75 static int
  76 dissect_ipos(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
  77 {
  78     proto_item  *ti = NULL;
  79     proto_tree  *ipos_tree = NULL;
  80     tvbuff_t    *next_tvb;
  81     int         offset = 0;
  82
  83     col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPOS");
  84     col_clear(pinfo->cinfo, COL_INFO);
  85
  86     ti = proto_tree_add_item(tree, proto_ipos, tvb, 0, -1, ENC_NA);
  87     ipos_tree = proto_item_add_subtree(ti, ett_ipos);
  88     proto_tree_add_item(ipos_tree, hf_ipos_protocol, tvb, offset, 1, ENC_BIG_ENDIAN);
  89     proto_tree_add_item(ipos_tree, hf_ipos_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
  90     offset += 1;
  91     proto_tree_add_item(ipos_tree, hf_ipos_ppe, tvb, offset, 1, ENC_BIG_ENDIAN);
  92     offset += 1;
  93     proto_tree_add_item(ipos_tree, hf_ipos_slot, tvb, offset, 2, ENC_BIG_ENDIAN);
  94     offset += 2;
  95
  96     if (redback_handle) {
  97         next_tvb = tvb_new_subset_remaining(tvb, offset);
  98         call_dissector(redback_handle, next_tvb, pinfo, tree);
  99     }
 100
 101     return tvb_reported_length(tvb);
 102 }
 103
 104 void
 105 proto_register_ipos(void)
 106 {
 107     static hf_register_info hf[] = {
 108         { &hf_ipos_protocol,
 109         { "Protocol", "ipos.proto", FT_UINT8, BASE_DEC, VALS(prototypenames), 0xF0,
 110         NULL, HFILL }},
 111
 112         { &hf_ipos_priority,
 113         { "Priority", "ipos.priority", FT_UINT8, BASE_DEC, NULL, 0x0F,
 114         NULL, HFILL }},
 115
 116         { &hf_ipos_ppe,
 117         { "Packet Processing Engine", "ipos.ppe", FT_UINT8, BASE_HEX, VALS(ppetypenames), 0x0,
 118         NULL, HFILL }},
 119
 120         { &hf_ipos_slot,
 121         { "Destination (source) Slot", "ipos.slot", FT_UINT16, BASE_DEC, NULL, 0x0,
 122         NULL, HFILL }}
 123     };
 124
 125     static int *ett[] = {
 126         &ett_ipos
 127     };
 128
 129 #if 0
 130     static ei_register_info ei[] = {
 131         { &ei_ipos_protocol,
 132         { "ipos.protocol.unknown", PI_PROTOCOL, PI_WARN,
 133         "Unknown Protocol Data", EXPFILL }}
 134     };
 135
 136     expert_module_t* expert_ipos;
 137 #endif
 138
 139     proto_ipos = proto_register_protocol("IPOS Kernel Packet Protocol", "IPOS", "ipos");
 140     proto_register_field_array(proto_ipos, hf, array_length(hf));
 141     proto_register_subtree_array(ett, array_length(ett));
 142 #if 0
 143     expert_ipos = expert_register_protocol(proto_ipos);
 144     expert_register_field_array(expert_ipos, ei, array_length(ei));
 145 #endif
 146     ipos_handle = register_dissector("ipos", dissect_ipos, proto_ipos);
 147 }
 148
 149 void
 150 proto_reg_handoff_ipos(void)
 151 {
 152     redback_handle = find_dissector_add_dependency("redback", proto_ipos);
 153
 154     /*dissector_add_uint("wtap_encap", WTAP_ENCAP_IPOS, ipos_handle); */
 155     dissector_add_uint("sll.ltype", LINUX_SLL_P_IPOS_NETIPC, ipos_handle);
 156     dissector_add_uint("sll.ltype", LINUX_SLL_P_IPOS_RBN, ipos_handle);
 157     dissector_add_uint("sll.ltype", LINUX_SLL_P_IPOS_NETLINK, ipos_handle);
 158     dissector_add_uint("sll.ltype", LINUX_SLL_P_IPOS_XCRP, ipos_handle);
 159     dissector_add_uint("sll.ltype", LINUX_SLL_P_IPOS_ISIS, ipos_handle);
 160     dissector_add_uint("sll.ltype", LINUX_SLL_P_IPOS_PAKIO, ipos_handle);
 161
 162     dissector_add_for_decode_as("ethertype", ipos_handle);
 163 }
 164
 165 /*
 166  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 167  *
 168  * Local variables:
 169  * c-basic-offset: 4
 170  * tab-width: 8
 171  * indent-tabs-mode: nil
 172  * End:
 173  *
 174  * vi: set shiftwidth=4 tabstop=8 expandtab:
 175  * :indentSize=4:tabSize=8:noTabs=true:
 176  */