diff options
Diffstat (limited to 'extras/packethicn/packet-hicn.c')
| -rw-r--r-- | extras/packethicn/packet-hicn.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/extras/packethicn/packet-hicn.c b/extras/packethicn/packet-hicn.c new file mode 100644 index 000000000..45ca7a5c4 --- /dev/null +++ b/extras/packethicn/packet-hicn.c @@ -0,0 +1,245 @@ +/* + * Copyright (c) 2021 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <epan/packet.h> +#include <gmodule.h> + +#define WS_BUILD_DLL +#include "ws_symbol_export.h" +#include "config.h" + +#include "epan/proto.h" + +#include <hicn/hicn.h> + +#define PATHLABEL_PAD_LEN 3 // To remove once fixed in libhicn + +// These should be defined in libhicn +#define TIMESCALE_BITS_OFFSET 4 +#define TIMESCALE_BITS_LENGTH 4 + +#define HICN_VERSION "0.0.1" + +/* TCP-HICN flags */ +#define FLAGS_BITS_LEN 8 +#define FLAGS_MASK 0xFF +#define TH_FIN 0x01 +#define TH_SYN 0x02 +#define TH_RST 0x04 +#define TH_ACK 0x10 +#define TH_CWR 0x80 +#define TH_ID 0x40 +#define TH_MAN 0x20 +#define TH_SIG 0x08 + +#define HICN_PORT 9695 + +WS_DLL_PUBLIC_DEF const gchar plugin_version[] = HICN_VERSION; +WS_DLL_PUBLIC_DEF const int plugin_want_major = VERSION_MAJOR; +WS_DLL_PUBLIC_DEF const int plugin_want_minor = VERSION_MINOR; + +WS_DLL_PUBLIC void plugin_register(void); +static void proto_register_hicn(void); +static void proto_reg_handoff_hicn(void); + +static int proto_hicn = -1; + +static int hf_hicn_ipv6_src = -1; +static int hf_hicn_ipv6_src_data = -1; +static int hf_hicn_ipv6_dst = -1; +static int hf_hicn_ipv6_dst_interest = -1; +static int hf_hicn_tcp_namesuffix = -1; +static int hf_hicn_tcp_pathlabel = -1; +static int hf_hicn_tcp_hdrlen_timescale = -1; +static int hf_hicn_tcp_hdrlen = -1; +static int hf_hicn_tcp_timescale = -1; +static int hf_hicn_tcp_flags = -1; +static int hf_hicn_tcp_flags_cwr = -1; +static int hf_hicn_tcp_flags_man = -1; +static int hf_hicn_tcp_flags_id = -1; +static int hf_hicn_tcp_flags_ack = -1; +static int hf_hicn_tcp_flags_sig = -1; +static int hf_hicn_tcp_flags_rst = -1; +static int hf_hicn_tcp_flags_syn = -1; +static int hf_hicn_tcp_flags_fin = -1; +static int hf_hicn_tcp_ldr = -1; +static int hf_hicn_tcp_csum = -1; +static int hf_hicn_tcp_lifetime = -1; + +static gint ett_hicn = -1; +static gint ett_hicn_l3 = -1; +static gint ett_hicn_l4 = -1; +static gint ett_hicn_l4_flags = -1; + + +static uint8_t *_p_hdr = NULL; + +bool is_interest(const hicn_header_t *header) { + bool is_interest = false; + + hicn_packet_test_ece(header, &is_interest); + + return !is_interest; +} + +// TODO: HANDLE ERRORS + +hicn_header_t *get_header(tvbuff_t *tvb, const gint offset, const gint length){ + tvb_ensure_bytes_exist(tvb, offset, length); + hicn_header_t *pkt_hdr = (hicn_header_t *) tvb_get_ptr(tvb, offset, length); + _p_hdr = (uint8_t *) pkt_hdr; + return pkt_hdr; +} + +uint32_t get_offset(uint8_t *data_addr){ + return data_addr - _p_hdr; +} + +static int +dissect_hicn(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) +{ + gint i = 0; + guint bpos; + + hicn_header_t *pkt_hdr = get_header(tvb, 0, HICN_V6_TCP_HDRLEN); + + wmem_strbuf_t *flags_strbuf = wmem_strbuf_new_label(wmem_packet_scope()); + static const gchar *flags[] = {"_FIN", "_SYN", "_RST", "SIG", "_ACK", "MAN", "ID", "_CWR"}; + wmem_strbuf_append(flags_strbuf, "<None>"); + + uint32_t flags_offset = get_offset((uint8_t *) &(pkt_hdr->v6.tcp.flags)); + + gboolean first_flag = TRUE; + for(i=0; i<9; i++) { + bpos = 1 << i; + if(pkt_hdr->v6.tcp.flags & bpos) { + if(first_flag) { + wmem_strbuf_truncate(flags_strbuf, 0); + } + wmem_strbuf_append_printf(flags_strbuf, "%s%s", first_flag ? "" : ", ", flags[i]); + first_flag = FALSE; + } + } + + // DISPLAY SECTION + col_set_str(pinfo->cinfo, COL_PROTOCOL, "HICN"); + col_clear(pinfo->cinfo, COL_INFO); + + proto_item *ti = proto_tree_add_item(tree, proto_hicn, tvb, 0, HICN_V6_TCP_HDRLEN, ENC_NA); + proto_tree *hicn_tree = proto_item_add_subtree(ti, ett_hicn); + + // L3 + proto_item *ti_l3; + proto_tree *hicn_l3_tree = proto_tree_add_subtree(hicn_tree, tvb, 0, IPV6_HDRLEN, ett_hicn_l3, &ti_l3, "HICN Layer 3"); + + if(is_interest(pkt_hdr)){ + proto_item_append_text(ti, ", Interest Packet"); + col_set_str(pinfo->cinfo, COL_INFO, "Interest Packet"); + proto_tree_add_item(hicn_l3_tree, hf_hicn_ipv6_src, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.ip.saddr)), sizeof(pkt_hdr->v6.ip.saddr), ENC_BIG_ENDIAN); + proto_tree_add_item(hicn_l3_tree, hf_hicn_ipv6_dst_interest, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.ip.daddr)), sizeof(pkt_hdr->v6.ip.daddr), ENC_BIG_ENDIAN); + } else { + // TODO: NEW LABEL FOR NACKS + proto_item_append_text(ti, ", Data Packet"); + col_set_str(pinfo->cinfo, COL_INFO, "Data Packet"); + proto_tree_add_item(hicn_l3_tree, hf_hicn_ipv6_src_data, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.ip.saddr)), sizeof(pkt_hdr->v6.ip.saddr), ENC_BIG_ENDIAN); + proto_tree_add_item(hicn_l3_tree, hf_hicn_ipv6_dst, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.ip.daddr)), sizeof(pkt_hdr->v6.ip.daddr), ENC_BIG_ENDIAN); + } + + // L4 + proto_item *ti_l4; + proto_tree *hicn_l4_tree = proto_tree_add_subtree(hicn_tree, tvb, IPV6_HDRLEN, TCP_HDRLEN, ett_hicn_l4, &ti_l4, "HICN Layer 4"); + + proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_namesuffix, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.name_suffix)), sizeof(pkt_hdr->v6.tcp.name_suffix), ENC_BIG_ENDIAN); + proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_pathlabel, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.pathlabel))+PATHLABEL_PAD_LEN, sizeof(pkt_hdr->v6.tcp.pathlabel), ENC_BIG_ENDIAN); + proto_item *ti_l4_ts = proto_tree_add_bits_item(hicn_l4_tree, hf_hicn_tcp_timescale, tvb, + get_offset((uint8_t *) &(pkt_hdr->v6.tcp.data_offset_and_reserved))*8 + TIMESCALE_BITS_OFFSET, TIMESCALE_BITS_LENGTH, ENC_BIG_ENDIAN); + proto_item_append_text(ti_l4_ts, " (Lifetime scaling factor: %dx)", pkt_hdr->v6.tcp.timescale+1); + proto_item *hicn_l4_flags_tree = proto_tree_add_uint_format_value(hicn_l4_tree, hf_hicn_tcp_flags, tvb, + get_offset((uint8_t *) &(pkt_hdr->v6.tcp.flags)), 1, pkt_hdr->v6.tcp.flags, "0x%02x (%s)", pkt_hdr->v6.tcp.flags, wmem_strbuf_get_str(flags_strbuf) + ); + proto_tree *field_tree = proto_item_add_subtree(hicn_l4_flags_tree, ett_hicn_l4_flags); + proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_cwr, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags); + proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_id, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags); + proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_man, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags); + proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_ack, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags); + proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_sig, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags); + proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_rst, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags); + proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_syn, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags); + proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_fin, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags); + proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_ldr, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.ldr)), sizeof(pkt_hdr->v6.tcp.ldr), ENC_BIG_ENDIAN); + proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_csum, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.csum)), sizeof(pkt_hdr->v6.tcp.ldr), ENC_BIG_ENDIAN); + proto_item *ti_l4_lt = proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_lifetime, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.lifetime)), sizeof(pkt_hdr->v6.tcp.ldr), ENC_BIG_ENDIAN); + proto_item_append_text(ti_l4_lt, " milliseconds"); + + dissector_handle_t data_handle = find_dissector("data"); + call_dissector(data_handle, tvb_new_subset_remaining(tvb, HICN_V6_TCP_HDRLEN), pinfo, tree); + return tvb_captured_length(tvb); +} + +static void +proto_register_hicn(void) +{ + static hf_register_info hf[] = { + { &hf_hicn_ipv6_src, { "Source Address", "hicn.l3.src", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_ipv6_src_data, { "Name Prefix", "hicn.l3.src", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_ipv6_dst, { "Destination Address", "hicn.l3.dst", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_ipv6_dst_interest, { "Name Prefix", "hicn.l3.dst", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_tcp_namesuffix, { "Name Suffix", "hicn.l4.namesuffix", FT_UINT32, BASE_HEX_DEC , NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_tcp_pathlabel, { "Path Label", "hicn.l4.pathlabel", FT_UINT8, BASE_HEX_DEC , NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_tcp_hdrlen_timescale, { "Header length and Timescale", "hicn.l4.hdrlen_ts", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_tcp_hdrlen, { "Header length", "hicn.l4.hdrlen", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_tcp_timescale, { "Timescale", "hich.l4.ts", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_tcp_flags, { "Flags", "hicn.l4.flags", FT_UINT8, BASE_HEX, NULL, FLAGS_MASK, NULL, HFILL }}, + { &hf_hicn_tcp_flags_cwr, { "_CWR", "hicn.l4.flags.cwr", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_CWR, NULL, HFILL }}, + { &hf_hicn_tcp_flags_id, { "ID", "hicn.l4.flags.id", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset),TH_ID, NULL, HFILL }}, + { &hf_hicn_tcp_flags_man, { "MAN", "hicn.l4.flags.man", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_MAN, NULL, HFILL }}, + { &hf_hicn_tcp_flags_ack, { "_ACK", "hicn.l4.flags.ack", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_ACK, NULL, HFILL }}, + { &hf_hicn_tcp_flags_sig, { "SIG", "hicn.l4.flags.sig", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_SIG, NULL, HFILL }}, + { &hf_hicn_tcp_flags_rst, { "_RST", "hicn.l4.flags.reset", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_RST, NULL, HFILL }}, + { &hf_hicn_tcp_flags_syn, { "_SYN", "hicn.l4.flags.syn", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_SYN, NULL, HFILL }}, + { &hf_hicn_tcp_flags_fin, { "_FIN", "hicn.l4.flags.fin", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_FIN, NULL, HFILL }}, + { &hf_hicn_tcp_ldr, { "Loss Detection and Recovery", "hicn.l4.ldr", FT_UINT16, BASE_HEX , NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_tcp_csum, { "Checksum", "hicn.l4.csum", FT_UINT16, BASE_HEX , NULL, 0x0, NULL, HFILL }}, + { &hf_hicn_tcp_lifetime, { "Lifetime", "hicn.l4.lifetime", FT_UINT16, BASE_DEC , NULL, 0x0, NULL, HFILL }} + }; + + static gint *ett[] = { + &ett_hicn, + &ett_hicn_l3, + &ett_hicn_l4, + &ett_hicn_l4_flags, + }; + + proto_hicn = proto_register_protocol ("Hybrid Information-Centric Networking Protocol", "HICN", "hicn"); + proto_register_field_array(proto_hicn, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); +} + +static void +proto_reg_handoff_hicn(void) +{ + static dissector_handle_t hicn_handle; + + hicn_handle = create_dissector_handle(dissect_hicn, proto_hicn); + dissector_add_uint("udp.port", HICN_PORT, hicn_handle); +} + +void plugin_register(void) +{ + static proto_plugin plug_hicn; + plug_hicn.register_protoinfo = proto_register_hicn; + plug_hicn.register_handoff = proto_reg_handoff_hicn; + proto_register_plugin(&plug_hicn); +} |