diff options
Diffstat (limited to 'plugins/epan/profinet/packet-pn-rt.c')
| -rw-r--r-- | plugins/epan/profinet/packet-pn-rt.c | 1171 |
1 files changed, 1171 insertions, 0 deletions
diff --git a/plugins/epan/profinet/packet-pn-rt.c b/plugins/epan/profinet/packet-pn-rt.c new file mode 100644 index 0000000000..3e4e1f5f80 --- /dev/null +++ b/plugins/epan/profinet/packet-pn-rt.c @@ -0,0 +1,1171 @@ +/* packet-pn-rt.c + * Routines for pn-rt (PROFINET Real-Time) packet dissection. + * This is the base for other PROFINET protocols like IO, CBA, DCP, ... + * (the "content subdissectors" will register themselves using a heuristic) + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1999 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" + +#include <epan/packet.h> +#include <epan/reassemble.h> +#include <epan/prefs.h> +#include <epan/etypes.h> +#include <epan/expert.h> +#include <epan/crc16-tvb.h> +#include <epan/dissectors/packet-dcerpc.h> + +#include <wsutil/crc16-plain.h> +#include "packet-pn.h" + + +void proto_register_pn_rt(void); +void proto_reg_handoff_pn_rt(void); + +#define PROFINET_UDP_PORT 0x8892 + +/* Define the pn-rt proto */ +static int proto_pn_rt = -1; +static gboolean pnio_desegment = TRUE; + +/* Define many header fields for pn-rt */ +static int hf_pn_rt_frame_id = -1; +static int hf_pn_rt_cycle_counter = -1; +static int hf_pn_rt_transfer_status = -1; +static int hf_pn_rt_data_status = -1; +static int hf_pn_rt_data_status_ignore = -1; +static int hf_pn_rt_frame_info_type = -1; +static int hf_pn_rt_frame_info_function_meaning_input_conv = -1; +static int hf_pn_rt_frame_info_function_meaning_output_conv = -1; +static int hf_pn_rt_data_status_Reserved_2 = -1; +static int hf_pn_rt_data_status_ok = -1; +static int hf_pn_rt_data_status_operate = -1; +static int hf_pn_rt_data_status_res3 = -1; +static int hf_pn_rt_data_status_valid = -1; +static int hf_pn_rt_data_status_redundancy = -1; +static int hf_pn_rt_data_status_redundancy_output_cr = -1; +static int hf_pn_rt_data_status_redundancy_input_cr_state_is_backup = -1; +static int hf_pn_rt_data_status_redundancy_input_cr_state_is_primary = -1; +static int hf_pn_rt_data_status_primary = -1; + +static int hf_pn_rt_sf_crc16 = -1; +static int hf_pn_rt_sf_crc16_status = -1; +static int hf_pn_rt_sf = -1; +static int hf_pn_rt_sf_position = -1; +/* static int hf_pn_rt_sf_position_control = -1; */ +static int hf_pn_rt_sf_data_length = -1; +static int hf_pn_rt_sf_cycle_counter = -1; + +static int hf_pn_rt_frag = -1; +static int hf_pn_rt_frag_data_length = -1; +static int hf_pn_rt_frag_status = -1; +static int hf_pn_rt_frag_status_more_follows = -1; +static int hf_pn_rt_frag_status_error = -1; +static int hf_pn_rt_frag_status_fragment_number = -1; +static int hf_pn_rt_frag_data = -1; + + +/* + * Define the trees for pn-rt + * We need one tree for pn-rt itself and one for the pn-rt data status subtree + */ +static int ett_pn_rt = -1; +static int ett_pn_rt_data_status = -1; +static int ett_pn_rt_sf = -1; +static int ett_pn_rt_frag = -1; +static int ett_pn_rt_frag_status = -1; + +static expert_field ei_pn_rt_sf_crc16 = EI_INIT; + +/* + * Here are the global variables associated with + * the various user definable characteristics of the dissection + */ +/* Place summary in proto tree */ +static gboolean pn_rt_summary_in_tree = TRUE; + +/* heuristic to find the right pn-rt payload dissector */ +static heur_dissector_list_t heur_subdissector_list; + + +#if 0 +static const value_string pn_rt_position_control[] = { + { 0x00, "CRC16 and CycleCounter shall not be checked" }, + { 0x80, "CRC16 and CycleCounter valid" }, + { 0, NULL } +}; +#endif + +static const true_false_string tfs_pn_rt_ds_redundancy_output_cr = + { "Unknown", "Redundancy has no meaning for OutputCRs, it is set to the fixed value of zero" }; + +static const true_false_string tfs_pn_rt_ds_redundancy_input_cr_state_is_backup = + { "None primary AR of a given AR-set is present", "Default - One primary AR of a given AR-set is present" }; + +static const true_false_string tfs_pn_rt_ds_redundancy_input_cr_state_is_primary = + { "The ARState from the IO device point of view is Backup", "Default - The ARState from the IO device point of view is Primary" }; + +static const value_string pn_rt_frame_info_function_meaning_input_conv[] = { + {0x00, "Backup Acknowledge without actual data" }, + {0x02, "Primary Missing without actual data" }, + {0x04, "Backup Acknowledge with actual data independent from the Arstate" }, + {0x05, "Primary Acknowledge"}, + {0x06, "Primary Missing with actual data independent from the Arstate" }, + {0x07, "Primary Fault" }, + {0, NULL} +}; + +static const value_string pn_rt_frame_info_function_meaning_output_conv[] = { + { 0x04, "Backup Request" }, + { 0x05, "Primary Request" }, + { 0, NULL } +}; + +static const true_false_string tfs_pn_rt_ds_redundancy = + {"Redundancy has no meaning for OutputCRs / One primary AR of a given AR-set is present" , "None primary AR of a given AR-set is present" }; + +static const value_string pn_rt_frag_status_error[] = { + { 0x00, "reserved" }, + { 0x01, "reserved: invalid should be zero" }, + { 0, NULL } +}; + +static const value_string pn_rt_frag_status_more_follows[] = { + { 0x00, "Last fragment" }, + { 0x01, "More fragments follow" }, + { 0, NULL } +}; + +/* Copied and renamed from proto.c because global value_strings don't work for plugins */ +static const value_string plugin_proto_checksum_vals[] = { + { PROTO_CHECKSUM_E_BAD, "Bad" }, + { PROTO_CHECKSUM_E_GOOD, "Good" }, + { PROTO_CHECKSUM_E_UNVERIFIED, "Unverified" }, + { PROTO_CHECKSUM_E_NOT_PRESENT, "Not present" }, + + { 0, NULL } +}; + +static void +dissect_DataStatus(tvbuff_t *tvb, int offset, proto_tree *tree, packet_info *pinfo, guint8 u8DataStatus) +{ + proto_item *sub_item; + proto_tree *sub_tree; + guint8 u8DataValid; + guint8 u8Redundancy; + guint8 u8State; + conversation_t *conversation; + gboolean inputFlag = FALSE; + gboolean outputFlag = FALSE; + apduStatusSwitch *apdu_status_switch; + + u8State = (u8DataStatus & 0x01); + u8Redundancy = (u8DataStatus >> 1) & 0x01; + u8DataValid = (u8DataStatus >> 2) & 0x01; + + /* if PN Connect Request has been read, IOC mac is dl_src and IOD mac is dl_dst */ + conversation = find_conversation(pinfo->num, &pinfo->dl_src, &pinfo->dl_dst, ENDPOINT_UDP, 0, 0, 0); + + if (conversation != NULL) { + apdu_status_switch = (apduStatusSwitch*)conversation_get_proto_data(conversation, proto_pn_io_apdu_status); + if (apdu_status_switch != NULL && apdu_status_switch->isRedundancyActive) { + /* IOC -> IOD: OutputCR */ + if (addresses_equal(&(pinfo->src), conversation_key_addr1(conversation->key_ptr)) && addresses_equal(&(pinfo->dst), conversation_key_addr2(conversation->key_ptr))) { + outputFlag = TRUE; + inputFlag = FALSE; + } + /* IOD -> IOC: InputCR */ + if (addresses_equal(&(pinfo->dst), conversation_key_addr1(conversation->key_ptr)) && addresses_equal(&(pinfo->src), conversation_key_addr2(conversation->key_ptr))) { + inputFlag = TRUE; + outputFlag = FALSE; + } + } + } + + /* input conversation is found */ + if (inputFlag) + { + proto_tree_add_string_format_value(tree, hf_pn_rt_frame_info_type, tvb, + offset, 0, "Input", "Input Frame (IO_Device -> IO_Controller)"); + } + /* output conversation is found. */ + else if (outputFlag) + { + proto_tree_add_string_format_value(tree, hf_pn_rt_frame_info_type, tvb, + offset, 0, "Output", "Output Frame (IO_Controller -> IO_Device)"); + } + + sub_item = proto_tree_add_uint_format(tree, hf_pn_rt_data_status, + tvb, offset, 1, u8DataStatus, + "DataStatus: 0x%02x (Frame: %s and %s, Provider: %s and %s)", + u8DataStatus, + (u8DataStatus & 0x04) ? "Valid" : "Invalid", + (u8DataStatus & 0x01) ? "Primary" : "Backup", + (u8DataStatus & 0x20) ? "Ok" : "Problem", + (u8DataStatus & 0x10) ? "Run" : "Stop"); + sub_tree = proto_item_add_subtree(sub_item, ett_pn_rt_data_status); + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_ignore, tvb, offset, 1, u8DataStatus); + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_Reserved_2, tvb, offset, 1, u8DataStatus); + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_ok, tvb, offset, 1, u8DataStatus); + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_operate, tvb, offset, 1, u8DataStatus); + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_res3, tvb, offset, 1, u8DataStatus); + /* input conversation is found */ + if (inputFlag) + { + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_valid, tvb, offset, 1, u8DataStatus); + proto_tree_add_item(tree, hf_pn_rt_frame_info_function_meaning_input_conv, tvb, offset, 1, u8DataStatus); + if (u8State == 0 && u8Redundancy == 0 && u8DataValid == 1) + { + proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_backup, tvb, offset, 1, u8DataStatus); + } + else if (u8State == 0 && u8Redundancy == 0 && u8DataValid == 0) + { + proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_backup, tvb, offset, 1, u8DataStatus); + } + else if (u8State == 0 && u8Redundancy == 1 && u8DataValid == 1) + { + proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_backup, tvb, offset, 1, u8DataStatus); + } + else if (u8State == 0 && u8Redundancy == 1 && u8DataValid == 0) + { + proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_backup, tvb, offset, 1, u8DataStatus); + } + else if (u8State == 1 && u8Redundancy == 0 && u8DataValid == 1) + { + proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_primary, tvb, offset, 1, u8DataStatus); + } + else if (u8State == 1 && u8Redundancy == 1 && u8DataValid == 1) + { + proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_primary, tvb, offset, 1, u8DataStatus); + } + + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_primary, tvb, offset, 1, u8DataStatus); + return; + } + // output conversation is found. + else if (outputFlag) + { + proto_tree_add_item(tree, hf_pn_rt_frame_info_function_meaning_output_conv, tvb, offset, 1, u8DataStatus); + + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_valid, tvb, offset, 1, u8DataStatus); + proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_output_cr, tvb, offset, 1, u8DataStatus); + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_primary, tvb, offset, 1, u8DataStatus); + + return; + } + + // If no conversation is found + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_valid, tvb, offset, 1, u8DataStatus); + proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy, tvb, offset, 1, u8DataStatus); + proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_primary, tvb, offset, 1, u8DataStatus); +} + + +static gboolean +IsDFP_Frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 u16FrameID) +{ + guint16 u16SFCRC16; + guint8 u8SFPosition; + guint8 u8SFDataLength = 255; + int offset = 0; + guint32 u32SubStart; + guint16 crc; + gint tvb_len = 0; + unsigned char virtualFramebuffer[16]; + + /* try to build a temporaray buffer for generating this CRC */ + if (!pinfo->src.data || !pinfo->dst.data || + pinfo->dst.type != AT_ETHER || pinfo->src.type != AT_ETHER) { + /* if we don't have src/dst mac addresses then we assume it's not + * to avoid various crashes */ + return FALSE; + } + memcpy(&virtualFramebuffer[0], pinfo->dst.data, 6); + memcpy(&virtualFramebuffer[6], pinfo->src.data, 6); + virtualFramebuffer[12] = 0x88; + virtualFramebuffer[13] = 0x92; + virtualFramebuffer[15] = (unsigned char) (u16FrameID &0xff); + virtualFramebuffer[14] = (unsigned char) (u16FrameID>>8); + crc = crc16_plain_init(); + crc = crc16_plain_update(crc, &virtualFramebuffer[0], 16); + crc = crc16_plain_finalize(crc); + /* can check this CRC only by having built a temporary data buffer out of the pinfo data */ + u16SFCRC16 = tvb_get_letohs(tvb, offset); + if (u16SFCRC16 != 0) /* no crc! */ + { + if (u16SFCRC16 != crc) + { + proto_item_append_text(tree, ", no packed frame: SFCRC16 is 0x%x should be 0x%x", u16SFCRC16, crc); + return(FALSE); + } + } + /* end of first CRC check */ + + offset += 2; /*Skip first crc */ + tvb_len = tvb_captured_length(tvb); + if (offset + 4 > tvb_len) + return FALSE; + if (tvb_get_letohs(tvb, offset) == 0) + return FALSE; /* no valid DFP frame */ + while (1) { + u32SubStart = offset; + + u8SFPosition = tvb_get_guint8(tvb, offset); + offset += 1; + + u8SFDataLength = tvb_get_guint8(tvb, offset); + offset += 1; + + if (u8SFDataLength == 0) { + break; + } + + offset += 2; + + offset += u8SFDataLength; + if (offset > tvb_len) + return /*TRUE; */FALSE; + + u16SFCRC16 = tvb_get_letohs(tvb, offset); + if (u16SFCRC16 != 0) { + if (u8SFPosition & 0x80) { + crc = crc16_plain_tvb_offset_seed(tvb, u32SubStart, offset-u32SubStart, 0); + if (crc != u16SFCRC16) { + return FALSE; + } else { + } + } else { + } + } + offset += 2; + } + return TRUE; +} + +/* possibly dissect a CSF_SDU related PN-RT packet */ +gboolean +dissect_CSF_SDU_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) +{ + /* the sub tvb will NOT contain the frame_id here! */ + guint16 u16FrameID = GPOINTER_TO_UINT(data); + guint16 u16SFCRC16; + guint8 u8SFPosition; + guint8 u8SFDataLength = 255; + guint8 u8SFCycleCounter; + guint8 u8SFDataStatus; + gint offset = 0; + guint32 u32SubStart; + proto_item *sub_item; + proto_tree *sub_tree; + guint16 crc; + + + /* possible FrameID ranges for DFP */ + if ((u16FrameID < 0x100) || (u16FrameID > 0x0FFF)) + return (FALSE); + if (IsDFP_Frame(tvb, pinfo, tree, u16FrameID)) { + /* can't check this CRC, as the checked data bytes are not available */ + u16SFCRC16 = tvb_get_letohs(tvb, offset); + if (u16SFCRC16 != 0) { + /* Checksum verify will always succeed */ + /* XXX - should we combine the two calls to always show "unverified"? */ + proto_tree_add_checksum(tree, tvb, offset, hf_pn_rt_sf_crc16, hf_pn_rt_sf_crc16_status, &ei_pn_rt_sf_crc16, pinfo, u16SFCRC16, + ENC_LITTLE_ENDIAN, PROTO_CHECKSUM_VERIFY); + } + else { + proto_tree_add_checksum(tree, tvb, offset, hf_pn_rt_sf_crc16, hf_pn_rt_sf_crc16_status, &ei_pn_rt_sf_crc16, pinfo, 0, + ENC_LITTLE_ENDIAN, PROTO_CHECKSUM_NO_FLAGS); + } + offset += 2; + + while (1) { + sub_item = proto_tree_add_item(tree, hf_pn_rt_sf, tvb, offset, 0, ENC_NA); + sub_tree = proto_item_add_subtree(sub_item, ett_pn_rt_sf); + u32SubStart = offset; + + u8SFPosition = tvb_get_guint8(tvb, offset); + proto_tree_add_uint(sub_tree, hf_pn_rt_sf_position, tvb, offset, 1, u8SFPosition); + offset += 1; + + u8SFDataLength = tvb_get_guint8(tvb, offset); + proto_tree_add_uint(sub_tree, hf_pn_rt_sf_data_length, tvb, offset, 1, u8SFDataLength); + offset += 1; + + if (u8SFDataLength == 0) { + proto_item_append_text(sub_item, ": Pos:%u, Length:%u", u8SFPosition, u8SFDataLength); + proto_item_set_len(sub_item, offset - u32SubStart); + break; + } + + u8SFCycleCounter = tvb_get_guint8(tvb, offset); + proto_tree_add_uint(sub_tree, hf_pn_rt_sf_cycle_counter, tvb, offset, 1, u8SFCycleCounter); + offset += 1; + + u8SFDataStatus = tvb_get_guint8(tvb, offset); + dissect_DataStatus(tvb, offset, sub_tree, pinfo, u8SFDataStatus); + offset += 1; + + offset = dissect_pn_user_data(tvb, offset, pinfo, sub_tree, u8SFDataLength, "DataItem"); + + u16SFCRC16 = tvb_get_letohs(tvb, offset); + + if (u16SFCRC16 != 0 /* "old check": u8SFPosition & 0x80 */) { + crc = crc16_plain_tvb_offset_seed(tvb, u32SubStart, offset-u32SubStart, 0); + proto_tree_add_checksum(tree, tvb, offset, hf_pn_rt_sf_crc16, hf_pn_rt_sf_crc16_status, &ei_pn_rt_sf_crc16, pinfo, crc, + ENC_LITTLE_ENDIAN, PROTO_CHECKSUM_VERIFY); + } else { + proto_tree_add_checksum(tree, tvb, offset, hf_pn_rt_sf_crc16, hf_pn_rt_sf_crc16_status, &ei_pn_rt_sf_crc16, pinfo, 0, + ENC_LITTLE_ENDIAN, PROTO_CHECKSUM_NO_FLAGS); + } + offset += 2; + + proto_item_append_text(sub_item, ": Pos:%u, Length:%u, Cycle:%u, Status: 0x%02x (%s,%s,%s,%s)", + u8SFPosition, u8SFDataLength, u8SFCycleCounter, u8SFDataStatus, + (u8SFDataStatus & 0x04) ? "Valid" : "Invalid", + (u8SFDataStatus & 0x01) ? "Primary" : "Backup", + (u8SFDataStatus & 0x20) ? "Ok" : "Problem", + (u8SFDataStatus & 0x10) ? "Run" : "Stop"); + + proto_item_set_len(sub_item, offset - u32SubStart); + } + + return TRUE; + } + + return FALSE; + +} + +/* for reasemble processing we need some inits.. */ +/* Register PNIO defrag table init routine. */ + +static reassembly_table pdu_reassembly_table; +static GHashTable *reasembled_frag_table = NULL; + +static dissector_table_t ethertype_subdissector_table; + +static guint32 start_frag_OR_ID[16]; + + +static void +pnio_defragment_init(void) +{ + guint32 i; + for (i=0; i < 16; i++) /* init the reasemble help array */ + start_frag_OR_ID[i] = 0; + reasembled_frag_table = g_hash_table_new(NULL, NULL); +} + +static void +pnio_defragment_cleanup(void) +{ + g_hash_table_destroy(reasembled_frag_table); +} + +/* possibly dissect a FRAG_PDU related PN-RT packet */ +static gboolean +dissect_FRAG_PDU_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) +{ + /* the sub tvb will NOT contain the frame_id here! */ + guint16 u16FrameID = GPOINTER_TO_UINT(data); + int offset = 0; + + + /* possible FrameID ranges for FRAG_PDU */ + if (u16FrameID >= 0xFF80 && u16FrameID <= 0xFF8F) { + proto_item *sub_item; + proto_tree *sub_tree; + proto_item *status_item; + proto_tree *status_tree; + guint8 u8FragDataLength; + guint8 u8FragStatus; + gboolean bMoreFollows; + guint8 uFragNumber; + + sub_item = proto_tree_add_item(tree, hf_pn_rt_frag, tvb, offset, 0, ENC_NA); + sub_tree = proto_item_add_subtree(sub_item, ett_pn_rt_frag); + + u8FragDataLength = tvb_get_guint8(tvb, offset); + proto_tree_add_uint(sub_tree, hf_pn_rt_frag_data_length, tvb, offset, 1, u8FragDataLength); + offset += 1; + + status_item = proto_tree_add_item(sub_tree, hf_pn_rt_frag_status, tvb, offset, 1, ENC_NA); + status_tree = proto_item_add_subtree(status_item, ett_pn_rt_frag_status); + + u8FragStatus = tvb_get_guint8(tvb, offset); + proto_tree_add_uint(status_tree, hf_pn_rt_frag_status_more_follows, tvb, offset, 1, u8FragStatus); + proto_tree_add_uint(status_tree, hf_pn_rt_frag_status_error, tvb, offset, 1, u8FragStatus); + proto_tree_add_uint(status_tree, hf_pn_rt_frag_status_fragment_number, tvb, offset, 1, u8FragStatus); + offset += 1; + uFragNumber = u8FragStatus & 0x3F; /* bits 0 to 5 */ + bMoreFollows = (u8FragStatus & 0x80) != 0; + proto_item_append_text(status_item, ": Number: %u, %s", + uFragNumber, + val_to_str( (u8FragStatus & 0x80) >> 7, pn_rt_frag_status_more_follows, "Unknown")); + + /* Is this a string or a bunch of bytes? Should it be FT_BYTES? */ + proto_tree_add_string_format(sub_tree, hf_pn_rt_frag_data, tvb, offset, tvb_captured_length_remaining(tvb, offset), "data", + "Fragment Length: %d bytes", tvb_captured_length_remaining(tvb, offset)); + col_append_fstr(pinfo->cinfo, COL_INFO, " Fragment Length: %d bytes", tvb_captured_length_remaining(tvb, offset)); + + dissect_pn_user_data_bytes(tvb, offset, pinfo, sub_tree, tvb_captured_length_remaining(tvb, offset), FRAG_DATA); + if ((guint)tvb_captured_length_remaining(tvb, offset) < (guint)(u8FragDataLength *8)) { + proto_item_append_text(status_item, ": FragDataLength out of Framerange -> discarding!"); + return (TRUE); + } + /* defragmentation starts here */ + if (pnio_desegment) + { + guint32 u32FragID; + guint32 u32ReasembleID /*= 0xfedc ??*/; + fragment_head *pdu_frag; + + u32FragID = (u16FrameID & 0xf); + if (uFragNumber == 0) + { /* this is the first "new" fragment, so set up a new key Id */ + guint32 u32FrameKey; + u32FrameKey = (pinfo->num << 2) | u32FragID; + /* store it in the array */ + start_frag_OR_ID[u32FragID] = u32FrameKey; + } + u32ReasembleID = start_frag_OR_ID[u32FragID]; + /* use frame data instead of "pnio fraglen" which sets 8 octet steps */ + pdu_frag = fragment_add_seq(&pdu_reassembly_table, tvb, offset, + pinfo, u32ReasembleID, NULL, uFragNumber, + (tvb_captured_length_remaining(tvb, offset))/*u8FragDataLength*8*/, bMoreFollows, 0); + + if (pdu_frag && !bMoreFollows) /* PDU is complete! and last fragment */ + { /* store this fragment as the completed fragment in hash table */ + g_hash_table_insert(reasembled_frag_table, GUINT_TO_POINTER(pinfo->num), pdu_frag); + start_frag_OR_ID[u32FragID] = 0; /* reset the starting frame counter */ + } + if (!bMoreFollows) /* last fragment */ + { + pdu_frag = (fragment_head *)g_hash_table_lookup(reasembled_frag_table, GUINT_TO_POINTER(pinfo->num)); + if (pdu_frag) /* found a matching fragment; dissect it */ + { + guint16 type; + tvbuff_t *pdu_tvb; + + /* create the new tvb for defragmented frame */ + pdu_tvb = tvb_new_chain(tvb, pdu_frag->tvb_data); + /* add the defragmented data to the data source list */ + add_new_data_source(pinfo, pdu_tvb, "Reassembled Profinet Frame"); + /* PDU is complete: look for the Ethertype and give it to the appropriate dissection routine */ + type = tvb_get_ntohs(pdu_tvb, 0); + pdu_tvb = tvb_new_subset_remaining(pdu_tvb, 2); + if (!dissector_try_uint(ethertype_subdissector_table, type, pdu_tvb, pinfo, tree)) + call_data_dissector(pdu_tvb, pinfo, tree); + } + } + return TRUE; + } + else + return TRUE; + } + return FALSE; +} + + +/* + * dissect_pn_rt - The dissector for the Soft-Real-Time protocol + */ +static int +dissect_pn_rt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + gint pdu_len; + gint data_len; + guint16 u16FrameID; + guint8 u8DataStatus; + guint8 u8TransferStatus; + guint16 u16CycleCounter; + const gchar *pszProtAddInfo; + const gchar *pszProtShort; + const gchar *pszProtSummary; + const gchar *pszProtComment; + proto_tree *pn_rt_tree, *ti; + gchar szFieldSummary[100]; + tvbuff_t *next_tvb; + gboolean bCyclic; + heur_dtbl_entry_t *hdtbl_entry; + + + /* If the link-layer dissector for the protocol above us knows whether + * the packet, as handed to it, includes a link-layer FCS, what it + * hands to us should not include the FCS; if that's not the case, + * that's a bug in that dissector, and should be fixed there. + * + * If the link-layer dissector for the protocol above us doesn't know + * whether the packet, as handed to us, includes a link-layer FCS, + * there are limits as to what can be done there; the dissector + * ultimately needs a "yes, it has an FCS" preference setting, which + * both the Ethernet and 802.11 dissectors do. If that's not the case + * for a dissector, that's a deficiency in that dissector, and should + * be fixed there. + * + * Therefore, we assume we are not handed a packet that includes an + * FCS. If we are ever handed such a packet, either the link-layer + * dissector needs to be fixed or the link-layer dissector's preference + * needs to be set for your capture (even if that means adding such + * a preference). This dissector (and other dissectors for protcols + * running atop the link layer) should not attempt to process the + * FCS themselves, as that will just break things. */ + + /* Initialize variables */ + pn_rt_tree = NULL; + ti = NULL; + + /* + * Set the columns now, so that they'll be set correctly if we throw + * an exception. We can set them (or append things) later again .... + */ + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "PN-RT"); + col_set_str(pinfo->cinfo, COL_INFO, "PROFINET Real-Time"); + + pdu_len = tvb_reported_length(tvb); + if (pdu_len < 6) { + dissect_pn_malformed(tvb, 0, pinfo, tree, pdu_len); + return 0; + } + + /* build some "raw" data */ + u16FrameID = tvb_get_ntohs(tvb, 0); + if (u16FrameID <= 0x001F) { + pszProtShort = "PN-RT"; + pszProtAddInfo = "reserved, "; + pszProtSummary = "Real-Time"; + pszProtComment = "0x0000-0x001F: Reserved ID"; + bCyclic = FALSE; + } else if (u16FrameID <= 0x0021) { + pszProtShort = "PN-PTCP"; + pszProtAddInfo = "Synchronization, "; + pszProtSummary = "Real-Time"; + pszProtComment = "0x0020-0x0021: Real-Time: Sync (with follow up)"; + bCyclic = FALSE; + } else if (u16FrameID <= 0x007F) { + pszProtShort = "PN-RT"; + pszProtAddInfo = "reserved, "; + pszProtSummary = "Real-Time"; + pszProtComment = "0x0022-0x007F: Reserved ID"; + bCyclic = FALSE; + } else if (u16FrameID <= 0x0081) { + pszProtShort = "PN-PTCP"; + pszProtAddInfo = "Synchronization, "; + pszProtSummary = "Isochronous-Real-Time"; + pszProtComment = "0x0080-0x0081: Real-Time: Sync (without follow up)"; + bCyclic = FALSE; + } else if (u16FrameID <= 0x00FF) { + pszProtShort = "PN-RT"; + pszProtAddInfo = "reserved, "; + pszProtSummary = "Real-Time"; + pszProtComment = "0x0082-0x00FF: Reserved ID"; + bCyclic = FALSE; + } else if (u16FrameID <= 0x6FF) { + pszProtShort = "PN-RTC3"; + pszProtAddInfo = "RTC3, "; + pszProtSummary = "Isochronous-Real-Time"; + pszProtComment = "0x0100-0x06FF: RED: Real-Time(class=3): non redundant, normal or DFP"; + bCyclic = TRUE; + } else if (u16FrameID <= 0x0FFF) { + pszProtShort = "PN-RTC3"; + pszProtAddInfo = "RTC3, "; + pszProtSummary = "Isochronous-Real-Time"; + pszProtComment = "0x0700-0x0FFF: RED: Real-Time(class=3): redundant, normal or DFP"; + bCyclic = TRUE; + } else if (u16FrameID <= 0x7FFF) { + pszProtShort = "PN-RT"; + pszProtAddInfo = "reserved, "; + pszProtSummary = "Real-Time"; + pszProtComment = "0x1000-0x7FFF: Reserved ID"; + bCyclic = FALSE; + } else if (u16FrameID <= 0xBBFF) { + pszProtShort = "PN-RTC1"; + pszProtAddInfo = "RTC1, "; + pszProtSummary = "cyclic Real-Time"; + pszProtComment = "0x8000-0xBBFF: Real-Time(class=1 unicast): non redundant, normal"; + bCyclic = TRUE; + } else if (u16FrameID <= 0xBFFF) { + pszProtShort = "PN-RTC1"; + pszProtAddInfo = "RTC1, "; + pszProtSummary = "cyclic Real-Time"; + pszProtComment = "0xBC00-0xBFFF: Real-Time(class=1 multicast): non redundant, normal"; + bCyclic = TRUE; + } else if (u16FrameID <= 0xF7FF) { + /* check if udp frame on PNIO port */ + if (pinfo->destport == 0x8892) + { /* UDP frame */ + pszProtShort = "PN-RTCUDP,"; + pszProtAddInfo = "RT_CLASS_UDP, "; + pszProtComment = "0xC000-0xF7FF: Real-Time(UDP unicast): Cyclic"; + } + else + { /* layer 2 frame */ + pszProtShort = "PN-RT"; + pszProtAddInfo = "RTC1(legacy), "; + pszProtComment = "0xC000-0xF7FF: Real-Time(class=1 unicast): Cyclic"; + } + pszProtSummary = "cyclic Real-Time"; + bCyclic = TRUE; + } else if (u16FrameID <= 0xFBFF) { + if (pinfo->destport == 0x8892) + { /* UDP frame */ + pszProtShort = "PN-RTCUDP,"; + pszProtAddInfo = "RT_CLASS_UDP, "; + pszProtComment = "0xF800-0xFBFF:: Real-Time(UDP multicast): Cyclic"; + } + else + { /* layer 2 frame */ + pszProtShort = "PN-RT"; + pszProtAddInfo = "RTC1(legacy), "; + pszProtComment = "0xF800-0xFBFF: Real-Time(class=1 multicast): Cyclic"; + } + pszProtSummary = "cyclic Real-Time"; + bCyclic = TRUE; + } else if (u16FrameID <= 0xFDFF) { + pszProtShort = "PN-RTA"; + pszProtAddInfo = "Reserved, "; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "0xFC00-0xFDFF: Reserved"; + bCyclic = FALSE; + if (u16FrameID == 0xfc01) { + pszProtShort = "PN-RTA"; + pszProtAddInfo = "Alarm High, "; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "Real-Time: Acyclic PN-IO Alarm high priority"; + } + + } else if (u16FrameID <= 0xFEFF) { + pszProtShort = "PN-RTA"; + pszProtAddInfo = "Reserved, "; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "0xFE00-0xFEFF: Real-Time: Reserved"; + bCyclic = FALSE; + if (u16FrameID == 0xFE01) { + pszProtShort = "PN-RTA"; + pszProtAddInfo = "Alarm Low, "; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "Real-Time: Acyclic PN-IO Alarm low priority"; + } + if (u16FrameID == FRAME_ID_DCP_HELLO) { + pszProtShort = "PN-RTA"; + pszProtAddInfo = ""; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) hello"; + } + if (u16FrameID == FRAME_ID_DCP_GETORSET) { + pszProtShort = "PN-RTA"; + pszProtAddInfo = ""; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) get/set"; + } + if (u16FrameID == FRAME_ID_DCP_IDENT_REQ) { + pszProtShort = "PN-RTA"; + pszProtAddInfo = ""; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) identify multicast request"; + } + if (u16FrameID == FRAME_ID_DCP_IDENT_RES) { + pszProtShort = "PN-RTA"; + pszProtAddInfo = ""; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) identify response"; + } + } else if (u16FrameID <= 0xFF01) { + pszProtShort = "PN-PTCP"; + pszProtAddInfo = "RTA Sync, "; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "0xFF00-0xFF01: PTCP Announce"; + bCyclic = FALSE; + } else if (u16FrameID <= 0xFF1F) { + pszProtShort = "PN-PTCP"; + pszProtAddInfo = "RTA Sync, "; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "0xFF02-0xFF1F: Reserved"; + bCyclic = FALSE; + } else if (u16FrameID <= 0xFF21) { + pszProtShort = "PN-PTCP"; + pszProtAddInfo = "Follow Up, "; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "0xFF20-0xFF21: PTCP Follow Up"; + bCyclic = FALSE; + } else if (u16FrameID <= 0xFF22) { + pszProtShort = "PN-PTCP"; + pszProtAddInfo = "Follow Up, "; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "0xFF22-0xFF3F: Reserved"; + bCyclic = FALSE; + } else if (u16FrameID <= 0xFF43) { + pszProtShort = "PN-PTCP"; + pszProtAddInfo = "Delay, "; + pszProtSummary = "acyclic Real-Time"; + pszProtComment = "0xFF40-0xFF43: Acyclic Real-Time: Delay"; + bCyclic = FALSE; + } else if (u16FrameID <= 0xFF7F) { + pszProtShort = "PN-RT"; + pszProtAddInfo = "Reserved, "; + pszProtSummary = "Real-Time"; + pszProtComment = "0xFF44-0xFF7F: reserved ID"; + bCyclic = FALSE; + } else if (u16FrameID <= 0xFF8F) { + pszProtShort = "PN-RT"; + pszProtAddInfo = ""; + pszProtSummary = "Fragmentation"; + pszProtComment = "0xFF80-0xFF8F: Fragmentation"; + bCyclic = FALSE; + } else { + pszProtShort = "PN-RT"; + pszProtAddInfo = "Reserved, "; + pszProtSummary = "Real-Time"; + pszProtComment = "0xFF90-0xFFFF: reserved ID"; + bCyclic = FALSE; + } + + /* decode optional cyclic fields at the packet end and build the summary line */ + if (bCyclic) { + /* cyclic transfer has cycle counter, data status and transfer status fields at the end */ + u16CycleCounter = tvb_get_ntohs(tvb, pdu_len - 4); + u8DataStatus = tvb_get_guint8(tvb, pdu_len - 2); + u8TransferStatus = tvb_get_guint8(tvb, pdu_len - 1); + + g_snprintf (szFieldSummary, sizeof(szFieldSummary), + "%sID:0x%04x, Len:%4u, Cycle:%5u (%s,%s,%s,%s)", + pszProtAddInfo, u16FrameID, pdu_len - 2 - 4, u16CycleCounter, + (u8DataStatus & 0x04) ? "Valid" : "Invalid", + (u8DataStatus & 0x01) ? "Primary" : "Backup", + (u8DataStatus & 0x20) ? "Ok" : "Problem", + (u8DataStatus & 0x10) ? "Run" : "Stop"); + + /* user data length is packet len - frame id - optional cyclic status fields */ + data_len = pdu_len - 2 - 4; + } else { + /* satisfy the gcc compiler, so it won't throw an "uninitialized" warning */ + u16CycleCounter = 0; + u8DataStatus = 0; + u8TransferStatus = 0; + + /* acyclic transfer has no fields at the end */ + g_snprintf (szFieldSummary, sizeof(szFieldSummary), + "%sID:0x%04x, Len:%4u", + pszProtAddInfo, u16FrameID, pdu_len - 2); + + /* user data length is packet len - frame id field */ + data_len = pdu_len - 2; + } + + /* build protocol tree only, if tree is really used */ + if (tree) { + /* build pn_rt protocol tree with summary line */ + if (pn_rt_summary_in_tree) { + ti = proto_tree_add_protocol_format(tree, proto_pn_rt, tvb, 0, pdu_len, + "PROFINET %s, %s", pszProtSummary, szFieldSummary); + } else { + ti = proto_tree_add_item(tree, proto_pn_rt, tvb, 0, pdu_len, ENC_NA); + } + pn_rt_tree = proto_item_add_subtree(ti, ett_pn_rt); + + /* add frame ID */ + proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_frame_id, tvb, + 0, 2, u16FrameID, "FrameID: 0x%04x (%s)", u16FrameID, pszProtComment); + + if (bCyclic) { + /* add cycle counter */ + proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_cycle_counter, tvb, + pdu_len - 4, 2, u16CycleCounter, "CycleCounter: %u", u16CycleCounter); + + /* add data status subtree */ + dissect_DataStatus(tvb, pdu_len - 2, pn_rt_tree, pinfo, u8DataStatus); + + /* add transfer status */ + if (u8TransferStatus) { + proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_transfer_status, tvb, + pdu_len - 1, 1, u8TransferStatus, + "TransferStatus: 0x%02x (ignore this frame)", u8TransferStatus); + } else { + proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_transfer_status, tvb, + pdu_len - 1, 1, u8TransferStatus, + "TransferStatus: 0x%02x (OK)", u8TransferStatus); + } + } + } + + /* update column info now */ + col_add_str(pinfo->cinfo, COL_INFO, szFieldSummary); + col_set_str(pinfo->cinfo, COL_PROTOCOL, pszProtShort); + + /* get frame user data tvb (without header and footer) */ + next_tvb = tvb_new_subset_length(tvb, 2, data_len); + + /* ask heuristics, if some sub-dissector is interested in this packet payload */ + if (!dissector_try_heuristic(heur_subdissector_list, next_tvb, pinfo, tree, &hdtbl_entry, GUINT_TO_POINTER( (guint32) u16FrameID))) { + /*col_set_str(pinfo->cinfo, COL_INFO, "Unknown");*/ + + /* Oh, well, we don't know this; dissect it as data. */ + dissect_pn_undecoded(next_tvb, 0, pinfo, tree, tvb_captured_length(next_tvb)); + } + return tvb_captured_length(tvb); +} + + +/* Register all the bits needed by the filtering engine */ +void +proto_register_pn_rt(void) +{ + static hf_register_info hf[] = { + { &hf_pn_rt_frame_id, + { "FrameID", "pn_rt.frame_id", + FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_cycle_counter, + { "CycleCounter", "pn_rt.cycle_counter", + FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_data_status, + { "DataStatus", "pn_rt.ds", + FT_UINT8, BASE_HEX, 0, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_ignore, + { "Ignore (1:Ignore/0:Evaluate)", "pn_rt.ds_ignore", FT_UINT8, BASE_HEX, 0, 0x80, + NULL, HFILL }}, + + { &hf_pn_rt_frame_info_type, + { "PN Frame Type", "pn_rt.ds_frame_info_type", FT_STRING, BASE_NONE, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_frame_info_function_meaning_input_conv, + { "Function/Meaning", "pn_rt.ds_frame_info_meaning", + FT_UINT8, BASE_HEX, VALS(pn_rt_frame_info_function_meaning_input_conv), 0x7, + NULL, HFILL } }, + + { &hf_pn_rt_frame_info_function_meaning_output_conv, + { "Function/Meaning", "pn_rt.ds_frame_info_meaning", + FT_UINT8, BASE_HEX, VALS(pn_rt_frame_info_function_meaning_output_conv), 0x7, + NULL, HFILL } }, + + { &hf_pn_rt_data_status_Reserved_2, + { "Reserved_2 (should be zero)", "pn_rt.ds_Reserved_2", + FT_UINT8, BASE_HEX, 0, 0x40, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_ok, + { "StationProblemIndicator (1:Ok/0:Problem)", "pn_rt.ds_ok", + FT_UINT8, BASE_HEX, 0, 0x20, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_operate, + { "ProviderState (1:Run/0:Stop)", "pn_rt.ds_operate", + FT_UINT8, BASE_HEX, 0, 0x10, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_res3, + { "Reserved_1 (should be zero)", "pn_rt.ds_res3", + FT_UINT8, BASE_HEX, 0, 0x08, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_valid, + { "DataValid (1:Valid/0:Invalid)", "pn_rt.ds_valid", + FT_UINT8, BASE_HEX, 0, 0x04, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_redundancy, + { "Redundancy", "pn_rt.ds_redundancy", + FT_BOOLEAN, 8, TFS(&tfs_pn_rt_ds_redundancy), 0x02, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_redundancy_output_cr, + { "Redundancy", "pn_rt.ds_redundancy", + FT_BOOLEAN, 8, TFS(&tfs_pn_rt_ds_redundancy_output_cr), 0x02, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_redundancy_input_cr_state_is_backup, + { "Redundancy", "pn_rt.ds_redundancy", + FT_BOOLEAN, 8, TFS(&tfs_pn_rt_ds_redundancy_input_cr_state_is_backup), 0x02, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_redundancy_input_cr_state_is_primary, + { "Redundancy", "pn_rt.ds_redundancy", + FT_BOOLEAN, 8, TFS(&tfs_pn_rt_ds_redundancy_input_cr_state_is_primary), 0x02, + NULL, HFILL }}, + + { &hf_pn_rt_data_status_primary, + { "State (1:Primary/0:Backup)", "pn_rt.ds_primary", + FT_UINT8, BASE_HEX, 0, 0x01, + NULL, HFILL }}, + + { &hf_pn_rt_transfer_status, + { "TransferStatus", "pn_rt.transfer_status", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_sf, + { "SubFrame", "pn_rt.sf", + FT_NONE, BASE_NONE, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_sf_crc16, + { "SFCRC16", "pn_rt.sf.crc16", + FT_UINT16, BASE_HEX, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_sf_crc16_status, + { "SFCRC16 status", "pn_rt.sf.crc16.status", + FT_UINT8, BASE_NONE, VALS(plugin_proto_checksum_vals), 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_sf_position, + { "Position", "pn_rt.sf.position", + FT_UINT8, BASE_DEC, NULL, 0x7F, + NULL, HFILL }}, + +#if 0 + { &hf_pn_rt_sf_position_control, + { "Control", "pn_rt.sf.position_control", + FT_UINT8, BASE_DEC, VALS(pn_rt_position_control), 0x80, + NULL, HFILL }}, +#endif + + { &hf_pn_rt_sf_data_length, + { "DataLength", "pn_rt.sf.data_length", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_sf_cycle_counter, + { "CycleCounter", "pn_rt.sf.cycle_counter", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_frag, + { "PROFINET Fragment", "pn_rt.frag", + FT_NONE, BASE_NONE, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_frag_data_length, + { "FragDataLength", "pn_rt.frag_data_length", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_frag_status, + { "FragStatus", "pn_rt.frag_status", + FT_NONE, BASE_NONE, NULL, 0x0, + NULL, HFILL }}, + + { &hf_pn_rt_frag_status_more_follows, + { "MoreFollows", "pn_rt.frag_status.more_follows", + FT_UINT8, BASE_HEX, VALS(pn_rt_frag_status_more_follows), 0x80, + NULL, HFILL }}, + + { &hf_pn_rt_frag_status_error, + { "Reserved", "pn_rt.frag_status.error", + FT_UINT8, BASE_HEX, VALS(pn_rt_frag_status_error), 0x40, + NULL, HFILL }}, + + { &hf_pn_rt_frag_status_fragment_number, + { "FragmentNumber (zero based)", "pn_rt.frag_status.fragment_number", + FT_UINT8, BASE_DEC, NULL, 0x3F, + NULL, HFILL }}, + + /* Is this a string or a bunch of bytes? Should it be FT_BYTES? */ + { &hf_pn_rt_frag_data, + { "FragData", "pn_rt.frag_data", + FT_STRING, BASE_NONE, NULL, 0x00, + NULL, HFILL }}, + + }; + static gint *ett[] = { + &ett_pn_rt, + &ett_pn_rt_data_status, + &ett_pn_rt_sf, + &ett_pn_rt_frag, + &ett_pn_rt_frag_status + }; + + static ei_register_info ei[] = { + { &ei_pn_rt_sf_crc16, { "pn_rt.sf.crc16_bad", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }}, + }; + + module_t *pn_rt_module; + expert_module_t* expert_pn_rt; + + proto_pn_rt = proto_register_protocol("PROFINET Real-Time Protocol", + "PN-RT", "pn_rt"); + + proto_register_field_array(proto_pn_rt, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + expert_pn_rt = expert_register_protocol(proto_pn_rt); + expert_register_field_array(expert_pn_rt, ei, array_length(ei)); + + /* Register our configuration options */ + + pn_rt_module = prefs_register_protocol(proto_pn_rt, NULL); + + prefs_register_bool_preference(pn_rt_module, "summary_in_tree", + "Show PN-RT summary in protocol tree", + "Whether the PN-RT summary line should be shown in the protocol tree", + &pn_rt_summary_in_tree); + + prefs_register_bool_preference(pn_rt_module, "desegment", + "reassemble PNIO Fragments", + "Reassemble PNIO Fragments and get them decoded", + &pnio_desegment); + + /* register heuristics anchor for payload dissectors */ + heur_subdissector_list = register_heur_dissector_list("pn_rt", proto_pn_rt); + + init_pn (proto_pn_rt); + register_init_routine(pnio_defragment_init); + register_cleanup_routine(pnio_defragment_cleanup); + reassembly_table_register(&pdu_reassembly_table, + &addresses_reassembly_table_functions); +} + + +/* The registration hand-off routine is called at startup */ +void +proto_reg_handoff_pn_rt(void) +{ + dissector_handle_t pn_rt_handle; + + pn_rt_handle = create_dissector_handle(dissect_pn_rt, proto_pn_rt); + + dissector_add_uint("ethertype", ETHERTYPE_PROFINET, pn_rt_handle); + dissector_add_uint_with_preference("udp.port", PROFINET_UDP_PORT, pn_rt_handle); + + heur_dissector_add("pn_rt", dissect_CSF_SDU_heur, "PROFINET CSF_SDU IO", "pn_csf_sdu_pn_rt", proto_pn_rt, HEURISTIC_ENABLE); + heur_dissector_add("pn_rt", dissect_FRAG_PDU_heur, "PROFINET Frag PDU IO", "pn_frag_pn_rt", proto_pn_rt, HEURISTIC_ENABLE); + + ethertype_subdissector_table = find_dissector_table("ethertype"); +} + + +/* + * Editor modelines - http://www.wireshark.org/tools/modelines.html + * + * Local variables: + * c-basic-offset: 4 + * tab-width: 8 + * indent-tabs-mode: nil + * End: + * + * vi: set shiftwidth=4 tabstop=8 expandtab: + * :indentSize=4:tabSize=8:noTabs=true: + */ |