diff --git a/AUTHORS b/AUTHORS index c5e74135d7..515226c629 100644 --- a/AUTHORS +++ b/AUTHORS @@ -2818,8 +2818,9 @@ Shigeo Nakamura { Xpress Transport Protocol dissector } -Sven Eckelmann { +Sven Eckelmann { B.A.T.M.A.N. dissector + B.A.T.M.A.N. Advanced dissector } Edward J. Paradise { diff --git a/epan/dissectors/Makefile.common b/epan/dissectors/Makefile.common index a372b037ea..7b41bab966 100644 --- a/epan/dissectors/Makefile.common +++ b/epan/dissectors/Makefile.common @@ -257,6 +257,7 @@ DISSECTOR_SRC = \ packet-bacnet.c \ packet-banana.c \ packet-bat.c \ + packet-batadv.c \ packet-bctp.c \ packet-beep.c \ packet-ber.c \ diff --git a/epan/dissectors/packet-batadv.c b/epan/dissectors/packet-batadv.c new file mode 100644 index 0000000000..2d250e13c5 --- /dev/null +++ b/epan/dissectors/packet-batadv.c @@ -0,0 +1,1600 @@ +/* packet-batadv.c + * Routines for B.A.T.M.A.N. Advanced dissection + * Copyright 2008-2009 Sven Eckelmann + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs + * Copyright 1998 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. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include +#include +#include +#include + +/* Start content from packet-batadv.h */ +#define ETH_P_BATMAN 0x4305 + +#define BATADV_PACKET 0x01 +#define BATADV_ICMP 0x02 +#define BATADV_UNICAST 0x03 +#define BATADV_BCAST 0x04 +#define BATADV_VIS 0x05 + +#define ECHO_REPLY 0 +#define DESTINATION_UNREACHABLE 3 +#define ECHO_REQUEST 8 +#define TTL_EXCEEDED 11 + +struct batman_packet_v5 { + guint8 packet_type; + guint8 version; /* batman version field */ + guint8 flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */ + guint8 ttl; + guint8 gwflags; /* flags related to gateway functions: gateway class */ + guint8 tq; + guint16 seqno; + address orig; + address prev_sender; + guint8 num_hna; + guint8 pad; +}; +#define BATMAN_PACKET_V5_SIZE 22 + +struct batman_packet_v7 { + guint8 packet_type; + guint8 version; /* batman version field */ + guint8 flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */ + guint8 tq; + guint16 seqno; + address orig; + address prev_sender; + guint8 ttl; + guint8 num_hna; +}; +#define BATMAN_PACKET_V7_SIZE 20 + +struct batman_packet_v9 { + guint8 packet_type; + guint8 version; /* batman version field */ + guint8 flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */ + guint8 tq; + guint16 seqno; + address orig; + address prev_sender; + guint8 ttl; + guint8 num_hna; + guint8 gwflags; + guint8 pad; +}; +#define BATMAN_PACKET_V9_SIZE 22 + +struct icmp_packet_v6 { + guint8 packet_type; + guint8 version; /* batman version field */ + guint8 msg_type; /* 0 = ECHO REPLY, 3 = DESTINATION_UNREACHABLE, 8 = ECHO_REQUEST, 11 = TTL exceeded */ + address dst; + address orig; + guint8 ttl; + guint8 uid; + guint16 seqno; +}; +#define ICMP_PACKET_V6_SIZE 19 + +struct icmp_packet_v7 { + guint8 packet_type; + guint8 version; /* batman version field */ + guint8 msg_type; /* 0 = ECHO REPLY, 3 = DESTINATION_UNREACHABLE, 8 = ECHO_REQUEST, 11 = TTL exceeded */ + guint8 ttl; + address dst; + address orig; + guint16 seqno; + guint8 uid; +}; +#define ICMP_PACKET_V7_SIZE 18 + +struct unicast_packet_v6 { + guint8 packet_type; + guint8 version; + address dest; + guint8 ttl; +}; +#define UNICAST_PACKET_V6_SIZE 9 + +struct bcast_packet_v6 { + guint8 packet_type; + guint8 version; /* batman version field */ + address orig; + guint16 seqno; +}; +#define BCAST_PACKET_V6_SIZE 10 + +struct vis_packet_v6 { + guint8 packet_type; + guint8 version; /* batman version field */ + guint8 vis_type; /* which type of vis-participant sent this? */ + guint8 seqno; /* sequence number */ + guint8 entries; /* number of entries behind this struct */ + guint8 ttl; /* TTL */ + address vis_orig; /* originator that informs about its neighbours */ + address target_orig; /* who should receive this packet */ + address sender_orig; /* who sent or rebroadcasted this packet */ +}; +#define VIS_PACKET_V6_SIZE 24 + +#define VIS_ENTRY_V6_SIZE 7 +#define VIS_ENTRY_V8_SIZE 13 + +#define VIS_TYPE_SERVER_SYNC 0 +#define VIS_TYPE_CLIENT_UPDATE 1 +/* End content from packet-batadv.h */ + +/* trees */ +static gint ett_batadv_batman = -1; +static gint ett_batadv_batman_flags = -1; +static gint ett_batadv_batman_gwflags = -1; +static gint ett_batadv_batman_hna = -1; +static gint ett_batadv_bcast = -1; +static gint ett_batadv_icmp = -1; +static gint ett_batadv_unicast = -1; +static gint ett_batadv_vis = -1; +static gint ett_batadv_vis_entry = -1; + +/* hfs */ +static int hf_batadv_packet_type = -1; + +static int hf_batadv_batman_version = -1; +static int hf_batadv_batman_flags = -1; +static int hf_batadv_batman_ttl = -1; +static int hf_batadv_batman_gwflags = -1; +static int hf_batadv_batman_tq = -1; +static int hf_batadv_batman_seqno = -1; +static int hf_batadv_batman_orig = -1; +static int hf_batadv_batman_prev_sender = -1; +static int hf_batadv_batman_num_hna = -1; +static int hf_batadv_batman_pad = -1; +static int hf_batadv_batman_hna = -1; + +static int hf_batadv_bcast_version = -1; +static int hf_batadv_bcast_pad = -1; +static int hf_batadv_bcast_orig = -1; +static int hf_batadv_bcast_seqno = -1; + +static int hf_batadv_icmp_version = -1; +static int hf_batadv_icmp_msg_type = -1; +static int hf_batadv_icmp_dst = -1; +static int hf_batadv_icmp_orig = -1; +static int hf_batadv_icmp_ttl = -1; +static int hf_batadv_icmp_uid = -1; +static int hf_batadv_icmp_seqno = -1; + +static int hf_batadv_unicast_version = -1; +static int hf_batadv_unicast_dst = -1; +static int hf_batadv_unicast_ttl = -1; + +static int hf_batadv_vis_version = -1; +static int hf_batadv_vis_type = -1; +static int hf_batadv_vis_seqno = -1; +static int hf_batadv_vis_entries = -1; +static int hf_batadv_vis_ttl = -1; +static int hf_batadv_vis_vis_orig = -1; +static int hf_batadv_vis_target_orig = -1; +static int hf_batadv_vis_sender_orig = -1; +static int hf_batadv_vis_entry_src = -1; +static int hf_batadv_vis_entry_dst = -1; +static int hf_batadv_vis_entry_quality = -1; + +/* flags */ +static int hf_batadv_batman_flags_directlink = -1; +static int hf_batadv_batman_flags_vis_server = -1; +static int hf_batadv_batman_flags_primaries_first_hop = -1; + +static const value_string icmp_packettypenames[] = { + { ECHO_REPLY, "ECHO_REPLY" }, + { DESTINATION_UNREACHABLE, "DESTINATION UNREACHABLE" }, + { ECHO_REQUEST, "ECHO_REQUEST" }, + { TTL_EXCEEDED, "TTL exceeded" }, + { 0, NULL } +}; + +static const value_string vis_packettypenames[] = { + { VIS_TYPE_SERVER_SYNC, "SERVER_SYNC" }, + { VIS_TYPE_CLIENT_UPDATE, "CLIENT_UPDATE" }, + { 0, NULL } +}; + + +/* forward declaration */ +void proto_register_batadv(void); +void proto_reg_handoff_batadv(void); +static void dissect_batman_plugin(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static dissector_handle_t batman_handle; + +/* supported packet dissectors */ +static void dissect_batadv_batman(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_batadv_batman_v5(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_batadv_batman_v7(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_batadv_batman_v9(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static void dissect_batadv_bcast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_batadv_bcast_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static void dissect_batadv_icmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_batadv_icmp_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_batadv_icmp_v7(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static void dissect_batadv_unicast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_batadv_unicast_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static void dissect_batadv_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_batadv_vis_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static void dissect_batadv_hna(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_vis_entry_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static void dissect_vis_entry_v8(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +/* other dissectors */ +static dissector_handle_t data_handle = NULL; +static dissector_handle_t eth_handle = NULL; + +static int proto_batadv_plugin = -1; + +/* tap */ +static int batadv_tap = -1; +static int batadv_follow_tap = -1; + +static unsigned int batadv_ethertype = ETH_P_BATMAN; + +static void dissect_batman_plugin(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 type; + + type = tvb_get_guint8(tvb, 0); + + switch (type) { + case BATADV_PACKET: + dissect_batadv_batman(tvb, pinfo, tree); + break; + case BATADV_ICMP: + dissect_batadv_icmp(tvb, pinfo, tree); + break; + case BATADV_UNICAST: + dissect_batadv_unicast(tvb, pinfo, tree); + break; + case BATADV_BCAST: + dissect_batadv_bcast(tvb, pinfo, tree); + break; + case BATADV_VIS: + dissect_batadv_vis(tvb, pinfo, tree); + break; + default: + /* dunno */ + { + tvbuff_t *next_tvb; + guint length_remaining; + + length_remaining = tvb_length_remaining(tvb, 1); + next_tvb = tvb_new_subset(tvb, 0, length_remaining, -1); + call_dissector(data_handle, next_tvb, pinfo, tree); + break; + } + } +} + +static void dissect_batadv_batman(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 version; + + /* set protocol name */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_BATMAN"); + + version = tvb_get_guint8(tvb, 1); + switch (version) { + case 5: + case 6: + dissect_batadv_batman_v5(tvb, pinfo, tree); + break; + case 7: + case 8: + dissect_batadv_batman_v7(tvb, pinfo, tree); + break; + case 9: + dissect_batadv_batman_v9(tvb, pinfo, tree); + break; + default: + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version); + } + call_dissector(data_handle, tvb, pinfo, tree); + break; + } +} + +static void dissect_batadv_gwflags(tvbuff_t *tvb, guint8 gwflags, int offset, proto_item *tgw) +{ + proto_tree *gwflags_tree; + guint8 s = (gwflags & 0x80) >> 7; + guint8 downbits = (gwflags & 0x7C) >> 3; + guint8 upbits = (gwflags & 0x07); + guint down, up; + + if (gwflags == 0) { + down = 0; + up = 0; + } else { + down = 32 * (s + 2) * (1 << downbits); + up = ((upbits + 1) * down) / 8; + } + + gwflags_tree = proto_item_add_subtree(tgw, ett_batadv_batman_gwflags); + proto_tree_add_text(gwflags_tree, tvb, offset, 1, "Download Speed: %dkbit", down); + proto_tree_add_text(gwflags_tree, tvb, offset, 1, "Upload Speed: %dkbit", up); + +} + +static void dissect_batadv_batman_v5(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 type; + struct batman_packet_v5 *batman_packeth; + const guint8 *prev_sender_addr, *orig_addr; + gint i; + + tvbuff_t *next_tvb; + guint length_remaining; + int offset = 0; + + batman_packeth = ep_alloc(sizeof(struct batman_packet_v5)); + + type = tvb_get_guint8(tvb, 0); + batman_packeth->version = tvb_get_guint8(tvb, 1); + + /* don't interpret padding as B.A.T.M.A.N. advanced packet */ + if (batman_packeth->version == 0 || type != BATADV_PACKET) { + return; + } + + batman_packeth->flags = tvb_get_guint8(tvb, 2); + batman_packeth->ttl = tvb_get_guint8(tvb, 3); + batman_packeth->gwflags = tvb_get_guint8(tvb, 4); + batman_packeth->tq = tvb_get_guint8(tvb, 5); + batman_packeth->seqno = tvb_get_ntohs(tvb, 6); + orig_addr = tvb_get_ptr(tvb, 8, 6); + SET_ADDRESS(&batman_packeth->orig, AT_ETHER, 6, orig_addr); + prev_sender_addr = tvb_get_ptr(tvb, 14, 6); + SET_ADDRESS(&batman_packeth->prev_sender, AT_ETHER, 6, prev_sender_addr); + batman_packeth->num_hna = tvb_get_guint8(tvb, 20); + batman_packeth->pad = tvb_get_guint8(tvb, 21); + + /* Set info column */ + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", + batman_packeth->seqno); + } + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL, *tf, *tgw; + proto_tree *batadv_batman_tree = NULL, *flag_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, BATMAN_PACKET_V5_SIZE, + "B.A.T.M.A.N., Orig: %s (%s)", + get_ether_name(orig_addr), ether_to_str(orig_addr)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, BATMAN_PACKET_V5_SIZE, FALSE); + } + batadv_batman_tree = proto_item_add_subtree(ti, ett_batadv_batman); + + /* items */ + proto_tree_add_uint_format(batadv_batman_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_PACKET, + "Packet Type: %s (%u)", "BATADV_PACKET", BATADV_PACKET); + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_version, tvb, offset, 1, FALSE); + offset += 1; + + tf = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_flags, tvb, offset, 1, FALSE); + /* */ + flag_tree = proto_item_add_subtree(tf, ett_batadv_batman_flags); + proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_directlink, tvb, offset, 1, batman_packeth->flags); + proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_vis_server, tvb, offset, 1, batman_packeth->flags); + /* */ + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_ttl, tvb, offset, 1, FALSE); + offset += 1; + + tgw = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_gwflags, tvb, offset, 1, FALSE); + dissect_batadv_gwflags(tvb, batman_packeth->gwflags, offset, tgw); + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_tq, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_seqno, tvb, offset, 2, FALSE); + offset += 2; + + proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_orig, tvb, offset, 6, orig_addr); + offset += 6; + + proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_prev_sender, tvb, offset, 6, prev_sender_addr); + offset += 6; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_num_hna, tvb, offset, 1, FALSE); + offset += 1; + + /* Hidden: proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_pad, tvb, offset, 1, FALSE); */ + offset += 1; + + SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr); + SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr); + + tap_queue_packet(batadv_tap, pinfo, batman_packeth); + + for (i = 0; i < batman_packeth->num_hna; i++) { + next_tvb = tvb_new_subset(tvb, offset, 6, 6); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + dissect_batadv_hna(next_tvb, pinfo, batadv_batman_tree); + offset += 6; + } + } + + length_remaining = tvb_length_remaining(tvb, offset); + if (length_remaining >= BATMAN_PACKET_V5_SIZE) { + next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + dissect_batadv_batman_v5(next_tvb, pinfo, tree); + } +} + +static void dissect_batadv_batman_v7(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 type; + struct batman_packet_v7 *batman_packeth; + const guint8 *prev_sender_addr, *orig_addr; + gint i; + + tvbuff_t *next_tvb; + guint length_remaining; + int offset = 0; + + batman_packeth = ep_alloc(sizeof(struct batman_packet_v7)); + + type = tvb_get_guint8(tvb, 0); + batman_packeth->version = tvb_get_guint8(tvb, 1); + + /* don't interpret padding as B.A.T.M.A.N. advanced packet */ + if (batman_packeth->version == 0 || type != BATADV_PACKET) { + return; + } + + batman_packeth->flags = tvb_get_guint8(tvb, 2); + batman_packeth->tq = tvb_get_guint8(tvb, 3); + batman_packeth->seqno = tvb_get_ntohs(tvb, 4); + orig_addr = tvb_get_ptr(tvb, 6, 6); + SET_ADDRESS(&batman_packeth->orig, AT_ETHER, 6, orig_addr); + prev_sender_addr = tvb_get_ptr(tvb, 12, 6); + SET_ADDRESS(&batman_packeth->prev_sender, AT_ETHER, 6, prev_sender_addr); + batman_packeth->ttl = tvb_get_guint8(tvb, 18); + batman_packeth->num_hna = tvb_get_guint8(tvb, 19); + + /* Set info column */ + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", + batman_packeth->seqno); + } + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL, *tf; + proto_tree *batadv_batman_tree = NULL, *flag_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, BATMAN_PACKET_V7_SIZE, + "B.A.T.M.A.N., Orig: %s (%s)", + get_ether_name(orig_addr), ether_to_str(orig_addr)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, BATMAN_PACKET_V7_SIZE, FALSE); + } + batadv_batman_tree = proto_item_add_subtree(ti, ett_batadv_batman); + + /* items */ + proto_tree_add_uint_format(batadv_batman_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_PACKET, + "Packet Type: %s (%u)", "BATADV_PACKET", BATADV_PACKET); + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_version, tvb, offset, 1, FALSE); + offset += 1; + + tf = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_flags, tvb, offset, 1, FALSE); + /* */ + flag_tree = proto_item_add_subtree(tf, ett_batadv_batman_flags); + proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_directlink, tvb, offset, 1, batman_packeth->flags); + proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_vis_server, tvb, offset, 1, batman_packeth->flags); + /* */ + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_tq, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_seqno, tvb, offset, 2, FALSE); + offset += 2; + + proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_orig, tvb, offset, 6, orig_addr); + offset += 6; + + proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_prev_sender, tvb, offset, 6, prev_sender_addr); + offset += 6; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_ttl, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_num_hna, tvb, offset, 1, FALSE); + offset += 1; + + SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr); + SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr); + + tap_queue_packet(batadv_tap, pinfo, batman_packeth); + + for (i = 0; i < batman_packeth->num_hna; i++) { + next_tvb = tvb_new_subset(tvb, offset, 6, 6); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + dissect_batadv_hna(next_tvb, pinfo, batadv_batman_tree); + offset += 6; + } + } + + length_remaining = tvb_length_remaining(tvb, offset); + if (length_remaining >= BATMAN_PACKET_V7_SIZE) { + next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + dissect_batadv_batman_v7(next_tvb, pinfo, tree); + } +} + +static void dissect_batadv_batman_v9(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 type; + struct batman_packet_v9 *batman_packeth; + const guint8 *prev_sender_addr, *orig_addr; + gint i; + + tvbuff_t *next_tvb; + guint length_remaining; + int offset = 0; + + batman_packeth = ep_alloc(sizeof(struct batman_packet_v9)); + + type = tvb_get_guint8(tvb, 0); + batman_packeth->version = tvb_get_guint8(tvb, 1); + + /* don't interpret padding as B.A.T.M.A.N. advanced packet */ + if (batman_packeth->version == 0 || type != BATADV_PACKET) { + return; + } + + batman_packeth->flags = tvb_get_guint8(tvb, 2); + batman_packeth->tq = tvb_get_guint8(tvb, 3); + batman_packeth->seqno = tvb_get_ntohs(tvb, 4); + orig_addr = tvb_get_ptr(tvb, 6, 6); + SET_ADDRESS(&batman_packeth->orig, AT_ETHER, 6, orig_addr); + prev_sender_addr = tvb_get_ptr(tvb, 12, 6); + SET_ADDRESS(&batman_packeth->prev_sender, AT_ETHER, 6, prev_sender_addr); + batman_packeth->ttl = tvb_get_guint8(tvb, 18); + batman_packeth->num_hna = tvb_get_guint8(tvb, 19); + batman_packeth->gwflags = tvb_get_guint8(tvb, 20); + + /* Set info column */ + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", + batman_packeth->seqno); + } + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL, *tf, *tgw; + proto_tree *batadv_batman_tree = NULL, *flag_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, BATMAN_PACKET_V9_SIZE, + "B.A.T.M.A.N., Orig: %s (%s)", + get_ether_name(orig_addr), ether_to_str(orig_addr)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, BATMAN_PACKET_V9_SIZE, FALSE); + } + batadv_batman_tree = proto_item_add_subtree(ti, ett_batadv_batman); + + /* items */ + proto_tree_add_uint_format(batadv_batman_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_PACKET, + "Packet Type: %s (%u)", "BATADV_PACKET", BATADV_PACKET); + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_version, tvb, offset, 1, FALSE); + offset += 1; + + tf = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_flags, tvb, offset, 1, FALSE); + /* */ + flag_tree = proto_item_add_subtree(tf, ett_batadv_batman_flags); + proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_directlink, tvb, offset, 1, batman_packeth->flags); + proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_vis_server, tvb, offset, 1, batman_packeth->flags); + proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_primaries_first_hop, tvb, offset, 1, batman_packeth->flags); + /* */ + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_tq, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_seqno, tvb, offset, 2, FALSE); + offset += 2; + + proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_orig, tvb, offset, 6, orig_addr); + offset += 6; + + proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_prev_sender, tvb, offset, 6, prev_sender_addr); + offset += 6; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_ttl, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_num_hna, tvb, offset, 1, FALSE); + offset += 1; + + tgw = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_gwflags, tvb, offset, 1, FALSE); + dissect_batadv_gwflags(tvb, batman_packeth->gwflags, offset, tgw); + offset += 1; + + /* Hidden: proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_pad, tvb, offset, 1, FALSE); */ + offset += 1; + + SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr); + SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr); + + tap_queue_packet(batadv_tap, pinfo, batman_packeth); + + for (i = 0; i < batman_packeth->num_hna; i++) { + next_tvb = tvb_new_subset(tvb, offset, 6, 6); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + dissect_batadv_hna(next_tvb, pinfo, batadv_batman_tree); + offset += 6; + } + } + + length_remaining = tvb_length_remaining(tvb, offset); + if (length_remaining >= BATMAN_PACKET_V9_SIZE) { + next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + dissect_batadv_batman_v9(next_tvb, pinfo, tree); + } +} + +static void dissect_batadv_hna(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) +{ + const guint8 *hna; + + hna = tvb_get_ptr(tvb, 0, 6); + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL; + proto_tree *batadv_batman_hna_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, 6, + "B.A.T.M.A.N. HNA: %s (%s)", + get_ether_name(hna), ether_to_str(hna)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, 6, FALSE); + } + batadv_batman_hna_tree = proto_item_add_subtree(ti, ett_batadv_batman_hna); + + proto_tree_add_ether(batadv_batman_hna_tree, hf_batadv_batman_hna, tvb, 0, 6, hna); + } +} + +static void dissect_batadv_bcast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 version; + + /* set protocol name */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_BCAST"); + + version = tvb_get_guint8(tvb, 1); + switch (version) { + case 6: + case 7: + case 8: + case 9: + dissect_batadv_bcast_v6(tvb, pinfo, tree); + break; + default: + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version); + } + call_dissector(data_handle, tvb, pinfo, tree); + break; + } +} + +static void dissect_batadv_bcast_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + struct bcast_packet_v6 *bcast_packeth; + const guint8 *orig_addr; + + tvbuff_t *next_tvb; + guint length_remaining; + int offset = 0; + + bcast_packeth = ep_alloc(sizeof(struct bcast_packet_v6)); + + bcast_packeth->version = tvb_get_ntohs(tvb, 1); + orig_addr = tvb_get_ptr(tvb, 2, 6); + SET_ADDRESS(&bcast_packeth->orig, AT_ETHER, 6, orig_addr); + bcast_packeth->seqno = tvb_get_ntohs(tvb, 8); + + /* Set info column */ + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", + bcast_packeth->seqno); + } + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL; + proto_tree *batadv_bcast_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, BCAST_PACKET_V6_SIZE, + "B.A.T.M.A.N. Bcast, Orig: %s (%s)", + get_ether_name(orig_addr), ether_to_str(orig_addr)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, BCAST_PACKET_V6_SIZE, FALSE); + } + batadv_bcast_tree = proto_item_add_subtree(ti, ett_batadv_bcast); + + /* items */ + proto_tree_add_uint_format(batadv_bcast_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_BCAST, + "Packet Type: %s (%u)", "BATADV_BCAST", BATADV_BCAST); + offset += 1; + + proto_tree_add_item(batadv_bcast_tree, hf_batadv_bcast_version, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_ether(batadv_bcast_tree, hf_batadv_bcast_orig, tvb, offset, 6, orig_addr); + offset += 6; + + proto_tree_add_item(batadv_bcast_tree, hf_batadv_bcast_seqno, tvb, offset, 2, FALSE); + offset += 2; + } + + SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr); + SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr); + + tap_queue_packet(batadv_tap, pinfo, bcast_packeth); + + length_remaining = tvb_length_remaining(tvb, offset); + + if (length_remaining != 0) { + next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + call_dissector(eth_handle, next_tvb, pinfo, tree); + } +} + +static void dissect_batadv_icmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 version; + + /* set protocol name */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_ICMP"); + + version = tvb_get_guint8(tvb, 1); + switch (version) { + case 6: + dissect_batadv_icmp_v6(tvb, pinfo, tree); + break; + case 7: + case 8: + case 9: + dissect_batadv_icmp_v7(tvb, pinfo, tree); + break; + default: + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version); + } + call_dissector(data_handle, tvb, pinfo, tree); + break; + } +} + +static void dissect_batadv_icmp_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + struct icmp_packet_v6 *icmp_packeth; + const guint8 *dst_addr, *orig_addr; + + tvbuff_t *next_tvb; + guint length_remaining; + int offset = 0; + + icmp_packeth = ep_alloc(sizeof(struct icmp_packet_v6)); + + icmp_packeth->version = tvb_get_guint8(tvb, 1); + icmp_packeth->msg_type = tvb_get_guint8(tvb, 2); + dst_addr = tvb_get_ptr(tvb, 3, 6); + SET_ADDRESS(&icmp_packeth->dst, AT_ETHER, 6, dst_addr); + orig_addr = tvb_get_ptr(tvb, 9, 6); + SET_ADDRESS(&icmp_packeth->orig, AT_ETHER, 6, orig_addr); + icmp_packeth->ttl = tvb_get_guint8(tvb, 15); + icmp_packeth->uid = tvb_get_guint8(tvb, 16); + icmp_packeth->seqno = tvb_get_ntohs(tvb, 17); + + /* Set info column */ + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "[%s] Seq=%u", + val_to_str(icmp_packeth->msg_type, icmp_packettypenames, "Unknown (0x%02x)"), + icmp_packeth->seqno); + } + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL; + proto_tree *batadv_icmp_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, ICMP_PACKET_V6_SIZE, + "B.A.T.M.A.N. ICMP, Orig: %s (%s), Dst: %s (%s)", + get_ether_name(orig_addr), ether_to_str(orig_addr), get_ether_name(dst_addr), ether_to_str(dst_addr)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, ICMP_PACKET_V6_SIZE, FALSE); + } + batadv_icmp_tree = proto_item_add_subtree(ti, ett_batadv_icmp); + + /* items */ + proto_tree_add_uint_format(batadv_icmp_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_ICMP, + "Packet Type: %s (%u)", "BATADV_ICMP", BATADV_ICMP); + offset += 1; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_version, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_msg_type, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_ether(batadv_icmp_tree, hf_batadv_icmp_dst, tvb, offset, 6, dst_addr); + offset += 6; + + proto_tree_add_ether(batadv_icmp_tree, hf_batadv_icmp_orig, tvb, offset, 6, orig_addr); + offset += 6; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_ttl, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_uid, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_seqno, tvb, offset, 1, FALSE); + offset += 1; + } + + SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr); + SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr); + + SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, orig_addr); + SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, orig_addr); + + tap_queue_packet(batadv_tap, pinfo, icmp_packeth); + + length_remaining = tvb_length_remaining(tvb, offset); + + if (length_remaining != 0) { + next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1); + + call_dissector(data_handle, next_tvb, pinfo, tree); + } +} + +static void dissect_batadv_icmp_v7(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + struct icmp_packet_v7 *icmp_packeth; + const guint8 *dst_addr, *orig_addr; + + tvbuff_t *next_tvb; + guint length_remaining; + int offset = 0; + + icmp_packeth = ep_alloc(sizeof(struct icmp_packet_v7)); + + icmp_packeth->version = tvb_get_guint8(tvb, 1); + icmp_packeth->msg_type = tvb_get_guint8(tvb, 2); + icmp_packeth->ttl = tvb_get_guint8(tvb, 3); + dst_addr = tvb_get_ptr(tvb, 4, 6); + SET_ADDRESS(&icmp_packeth->dst, AT_ETHER, 6, dst_addr); + orig_addr = tvb_get_ptr(tvb, 10, 6); + SET_ADDRESS(&icmp_packeth->orig, AT_ETHER, 6, orig_addr); + icmp_packeth->seqno = tvb_get_ntohs(tvb, 16); + icmp_packeth->uid = tvb_get_guint8(tvb, 17); + + /* Set info column */ + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "[%s] Seq=%u", + val_to_str(icmp_packeth->msg_type, icmp_packettypenames, "Unknown (0x%02x)"), + icmp_packeth->seqno); + } + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL; + proto_tree *batadv_icmp_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, ICMP_PACKET_V7_SIZE, + "B.A.T.M.A.N. ICMP, Orig: %s (%s), Dst: %s (%s)", + get_ether_name(orig_addr), ether_to_str(orig_addr), get_ether_name(dst_addr), ether_to_str(dst_addr)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, ICMP_PACKET_V7_SIZE, FALSE); + } + batadv_icmp_tree = proto_item_add_subtree(ti, ett_batadv_icmp); + + /* items */ + proto_tree_add_uint_format(batadv_icmp_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_ICMP, + "Packet Type: %s (%u)", "BATADV_ICMP", BATADV_ICMP); + offset += 1; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_version, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_msg_type, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_ttl, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_ether(batadv_icmp_tree, hf_batadv_icmp_dst, tvb, offset, 6, dst_addr); + offset += 6; + + proto_tree_add_ether(batadv_icmp_tree, hf_batadv_icmp_orig, tvb, offset, 6, orig_addr); + offset += 6; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_seqno, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_uid, tvb, offset, 1, FALSE); + offset += 1; + } + + SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr); + SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr); + + SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, orig_addr); + SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, orig_addr); + + tap_queue_packet(batadv_tap, pinfo, icmp_packeth); + + length_remaining = tvb_length_remaining(tvb, offset); + + if (length_remaining != 0) { + next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1); + + call_dissector(data_handle, next_tvb, pinfo, tree); + } +} + +static void dissect_batadv_unicast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 version; + + /* set protocol name */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_UNICAST"); + + version = tvb_get_guint8(tvb, 1); + switch (version) { + case 6: + case 7: + case 8: + case 9: + dissect_batadv_unicast_v6(tvb, pinfo, tree); + break; + default: + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version); + } + call_dissector(data_handle, tvb, pinfo, tree); + break; + } +} + +static void dissect_batadv_unicast_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + struct unicast_packet_v6 *unicast_packeth; + const guint8 *dest_addr; + + tvbuff_t *next_tvb; + guint length_remaining; + int offset = 0; + + unicast_packeth = ep_alloc(sizeof(struct unicast_packet_v6)); + + unicast_packeth->version = tvb_get_guint8(tvb, 1); + dest_addr = tvb_get_ptr(tvb, 2, 6); + SET_ADDRESS(&unicast_packeth->dest, AT_ETHER, 6, dest_addr); + unicast_packeth->ttl = tvb_get_guint8(tvb, 8); + + /* Set info column */ + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + } + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL; + proto_tree *batadv_unicast_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, UNICAST_PACKET_V6_SIZE, + "B.A.T.M.A.N. Unicast, Dst: %s (%s)", + get_ether_name(dest_addr), ether_to_str(dest_addr)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, UNICAST_PACKET_V6_SIZE, FALSE); + } + batadv_unicast_tree = proto_item_add_subtree(ti, ett_batadv_unicast); + + /* items */ + proto_tree_add_uint_format(batadv_unicast_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_UNICAST, + "Packet Type: %s (%u)", "BATADV_UNICAST", BATADV_UNICAST); + offset += 1; + + proto_tree_add_item(batadv_unicast_tree, hf_batadv_unicast_version, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_ether(batadv_unicast_tree, hf_batadv_unicast_dst, tvb, offset, 6, dest_addr); + offset += 6; + + proto_tree_add_item(batadv_unicast_tree, hf_batadv_unicast_ttl, tvb, offset, 1, FALSE); + offset += 1; + } + + SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, dest_addr); + SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, dest_addr); + + tap_queue_packet(batadv_tap, pinfo, unicast_packeth); + + length_remaining = tvb_length_remaining(tvb, offset); + + if (length_remaining != 0) { + next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + call_dissector(eth_handle, next_tvb, pinfo, tree); + } +} + +static void dissect_batadv_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 version; + + /* set protocol name */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_VIS"); + + version = tvb_get_guint8(tvb, 1); + switch (version) { + case 6: + case 7: + case 8: + case 9: + dissect_batadv_vis_v6(tvb, pinfo, tree); + break; + default: + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version); + } + call_dissector(data_handle, tvb, pinfo, tree); + break; + } +} + +static void dissect_batadv_vis_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + struct vis_packet_v6 *vis_packeth; + const guint8 *vis_orig_addr, *target_orig_addr, *sender_orig_addr; + proto_tree *batadv_vis_tree = NULL; + + tvbuff_t *next_tvb; + guint length_remaining, entry_size; + int offset = 0, i; + + vis_packeth = ep_alloc(sizeof(struct vis_packet_v6)); + + vis_packeth->version = tvb_get_guint8(tvb, 1); + vis_packeth->vis_type = tvb_get_guint8(tvb, 2); + vis_packeth->seqno = tvb_get_guint8(tvb, 3); + vis_packeth->entries = tvb_get_guint8(tvb, 4); + vis_packeth->ttl = tvb_get_guint8(tvb, 5); + + vis_orig_addr = tvb_get_ptr(tvb, 6, 6); + SET_ADDRESS(&vis_packeth->vis_orig, AT_ETHER, 6, vis_orig_addr); + target_orig_addr = tvb_get_ptr(tvb, 12, 6); + SET_ADDRESS(&vis_packeth->target_orig, AT_ETHER, 6, target_orig_addr); + sender_orig_addr = tvb_get_ptr(tvb, 18, 6); + SET_ADDRESS(&vis_packeth->sender_orig, AT_ETHER, 6, sender_orig_addr); + + /* Set info column */ + if (check_col(pinfo->cinfo, COL_INFO)) { + col_clear(pinfo->cinfo, COL_INFO); + col_append_fstr(pinfo->cinfo, COL_INFO, "[%s] Seq=%u", + val_to_str(vis_packeth->vis_type, vis_packettypenames, "Unknown (0x%02x)"), + vis_packeth->seqno); + } + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, VIS_PACKET_V6_SIZE, + "B.A.T.M.A.N. Vis, Orig: %s (%s)", + get_ether_name(vis_orig_addr), ether_to_str(vis_orig_addr)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, VIS_PACKET_V6_SIZE, FALSE); + } + batadv_vis_tree = proto_item_add_subtree(ti, ett_batadv_vis); + + /* items */ + proto_tree_add_uint_format(batadv_vis_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_VIS, + "Packet Type: %s (%u)", "BATADV_VIS", BATADV_VIS); + offset += 1; + + proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_version, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_type, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_seqno, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_entries, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_ttl, tvb, offset, 1, FALSE); + offset += 1; + + proto_tree_add_ether(batadv_vis_tree, hf_batadv_vis_vis_orig, tvb, offset, 6, vis_orig_addr); + offset += 6; + + proto_tree_add_ether(batadv_vis_tree, hf_batadv_vis_target_orig, tvb, offset, 6, target_orig_addr); + offset += 6; + + proto_tree_add_ether(batadv_vis_tree, hf_batadv_vis_sender_orig, tvb, offset, 6, sender_orig_addr); + offset += 6; + } + + SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, sender_orig_addr); + SET_ADDRESS(&pinfo->src, AT_ETHER, 6, vis_orig_addr); + + SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, target_orig_addr); + SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, target_orig_addr); + + tap_queue_packet(batadv_tap, pinfo, vis_packeth); + + switch (vis_packeth->version) { + case 6: + case 7: + entry_size = VIS_ENTRY_V6_SIZE; + break; + default: + case 8: + case 9: + entry_size = VIS_ENTRY_V8_SIZE; + break; + } + + for (i = 0; i < vis_packeth->entries; i++) { + next_tvb = tvb_new_subset(tvb, offset, entry_size, entry_size); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + if (batadv_vis_tree != NULL) { + switch (vis_packeth->version) { + case 6: + case 7: + dissect_vis_entry_v6(next_tvb, pinfo, batadv_vis_tree); + break; + default: + case 8: + case 9: + dissect_vis_entry_v8(next_tvb, pinfo, batadv_vis_tree); + break; + } + } + + offset += entry_size; + } + + length_remaining = tvb_length_remaining(tvb, offset); + if (length_remaining != 0) { + next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1); + + if (have_tap_listener(batadv_follow_tap)) { + tap_queue_packet(batadv_follow_tap, pinfo, next_tvb); + } + + call_dissector(data_handle, next_tvb, pinfo, tree); + } +} + +static void dissect_vis_entry_v6(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) +{ + const guint8 *dst; + + dst = tvb_get_ptr(tvb, 0, 6); + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL; + proto_tree *batadv_vis_entry_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, VIS_ENTRY_V6_SIZE, + "VIS Entry: %s (%s)", + get_ether_name(dst), ether_to_str(dst)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, VIS_ENTRY_V6_SIZE, FALSE); + } + batadv_vis_entry_tree = proto_item_add_subtree(ti, ett_batadv_vis_entry); + + proto_tree_add_ether(batadv_vis_entry_tree, hf_batadv_vis_entry_dst, tvb, 0, 6, dst); + proto_tree_add_item(batadv_vis_entry_tree, hf_batadv_vis_entry_quality, tvb, 6, 1, FALSE); + } +} + +static void dissect_vis_entry_v8(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) +{ + const guint8 *dst, *src; + + src = tvb_get_ptr(tvb, 0, 6); + dst = tvb_get_ptr(tvb, 6, 6); + + /* Set tree info */ + if (tree) { + proto_item *ti = NULL; + proto_tree *batadv_vis_entry_tree = NULL; + + if (PTREE_DATA(tree)->visible) { + ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, VIS_ENTRY_V8_SIZE, + "VIS Entry: %s (%s)", + get_ether_name(dst), ether_to_str(dst)); + } else { + ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, VIS_ENTRY_V8_SIZE, FALSE); + } + batadv_vis_entry_tree = proto_item_add_subtree(ti, ett_batadv_vis_entry); + + proto_tree_add_ether(batadv_vis_entry_tree, hf_batadv_vis_entry_src, tvb, 0, 6, src); + proto_tree_add_ether(batadv_vis_entry_tree, hf_batadv_vis_entry_dst, tvb, 6, 6, dst); + proto_tree_add_item(batadv_vis_entry_tree, hf_batadv_vis_entry_quality, tvb, 12, 1, FALSE); + } +} + +void proto_register_batadv(void) +{ + module_t *batadv_module; + + static hf_register_info hf[] = { + { &hf_batadv_packet_type, + { "Packet Type", "batadv.batman.packet_type", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_version, + { "Version", "batadv.batman.version", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_flags, + { "Flags", "batadv.batman.flags", + FT_UINT8, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_ttl, + { "Time to Live", "batadv.batman.ttl", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_gwflags, + { "Gateway Flags", "batadv.batman.gwflags", + FT_UINT8, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_tq, + { "Transmission Quality", "batadv.batman.tq", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_seqno, + { "Sequence number", "batadv.batman.seq", + FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_orig, + { "Originator", "batadv.batman.orig", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_prev_sender, + { "Received from", "batadv.batman.prev_sender", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_num_hna, + { "Number of HNAs", "batadv.batman.num_hna", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_pad, + { "Padding", "batadv.batman.pad", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_batman_flags_directlink, + { "DirectLink", "batadv.batman.flags.directlink", + FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x40, + NULL, HFILL } + }, + { &hf_batadv_batman_flags_vis_server, + { "VIS_SERVER", "batadv.batman.flags.vis_server", + FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x20, + NULL, HFILL } + }, + { &hf_batadv_batman_flags_primaries_first_hop, + { "PRIMARIES_FIRST_HOP", "batadv.batman.flags.primaries_first_hop", + FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x10, + NULL, HFILL } + }, + { &hf_batadv_batman_hna, + { "Host Network Announcement", "batadv.batman.hna", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_bcast_version, + { "Version", "batadv.bcast.version", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_bcast_pad, + { "Padding", "batadv.bcast.pad", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_bcast_orig, + { "Originator", "batadv.bcast.orig", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_bcast_seqno, + { "Sequence number", "batadv.bcast.seq", + FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_icmp_version, + { "Version", "batadv.icmp.version", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_icmp_msg_type, + { "Message Type", "batadv.icmp.msg_type", + FT_UINT8, BASE_DEC, VALS(icmp_packettypenames), 0x0, + NULL, HFILL } + }, + { &hf_batadv_icmp_dst, + { "Destination", "batadv.icmp.dst", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_icmp_orig, + { "Originator", "batadv.icmp.orig", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_icmp_ttl, + { "Time to Live", "batadv.icmp.ttl", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL} + }, + { &hf_batadv_icmp_uid, + { "UID", "batadv.icmp.uid", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL} + }, + { &hf_batadv_icmp_seqno, + { "Sequence number", "batadv.icmp.seq", + FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL} + }, + { &hf_batadv_unicast_version, + { "Version", "batadv.unicast.version", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_unicast_dst, + { "Destination", "batadv.unicast.dst", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_unicast_ttl, + { "Time to Live", "batadv.unicast.ttl", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_vis_version, + { "Version", "batadv.vis.version", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_vis_type, + { "Type", "batadv.vis.type", + FT_UINT8, BASE_DEC, VALS(vis_packettypenames), 0x0, + NULL, HFILL } + }, + { &hf_batadv_vis_seqno, + { "Sequence number", "batadv.vis.seq", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL} + }, + { &hf_batadv_vis_entries, + { "Entries", "batadv.vis.entries", + FT_UINT8, BASE_DEC, NULL, 0x0, + "Number of entries", HFILL} + }, + { &hf_batadv_vis_ttl, + { "Time to Live", "batadv.vis.ttl", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL} + }, + { &hf_batadv_vis_vis_orig, + { "Originator", "batadv.vis.vis_orig", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_vis_target_orig, + { "Target Originator", "batadv.vis.target_orig", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_vis_sender_orig, + { "Forwarding Originator", "batadv.vis.sender_orig", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_vis_entry_src, + { "Source", "hf_batadv_vis_entry.src", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_vis_entry_dst, + { "Destination", "hf_batadv_vis_entry.dst", + FT_ETHER, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_batadv_vis_entry_quality, + { "Quality", "batadv.vis.quality", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + } + }; + + /* Setup protocol subtree array */ + static gint *ett[] = { + &ett_batadv_batman, + &ett_batadv_batman_flags, + &ett_batadv_batman_hna, + &ett_batadv_batman_gwflags, + &ett_batadv_bcast, + &ett_batadv_icmp, + &ett_batadv_unicast, + &ett_batadv_vis, + &ett_batadv_vis_entry + }; + + proto_batadv_plugin = proto_register_protocol( + "B.A.T.M.A.N. Advanced Protocol", + "BATADV", /* short name */ + "batadv" /* abbrev */ + ); + + batadv_module = prefs_register_protocol(proto_batadv_plugin, + proto_reg_handoff_batadv); + + prefs_register_uint_preference(batadv_module, "batmanadv.ethertype", + "Ethertype", + "Ethertype used to indicate B.A.T.M.A.N. packet.", + 16, &batadv_ethertype); + + proto_register_subtree_array(ett, array_length(ett)); + proto_register_field_array(proto_batadv_plugin, hf, array_length(hf)); +} + +void proto_reg_handoff_batadv(void) +{ + static gboolean inited = FALSE; + static unsigned int old_batadv_ethertype; + + if (!inited) { + batman_handle = create_dissector_handle(dissect_batman_plugin, proto_batadv_plugin); + + data_handle = find_dissector("data"); + eth_handle = find_dissector("eth"); + + batadv_tap = register_tap("batman"); + batadv_follow_tap = register_tap("batman_follow"); + + inited = TRUE; + } else { + dissector_delete("ethertype", old_batadv_ethertype, batman_handle); + } + + old_batadv_ethertype = batadv_ethertype; + dissector_add("ethertype", batadv_ethertype, batman_handle); +}