1 | /* |
---|
2 | * This file is part of libtrace |
---|
3 | * |
---|
4 | * Copyright (c) 2007 The University of Waikato, Hamilton, New Zealand. |
---|
5 | * Authors: Perry Lorier |
---|
6 | * |
---|
7 | * All rights reserved. |
---|
8 | * |
---|
9 | * This code has been developed by the University of Waikato WAND |
---|
10 | * research group. For further information please see http://www.wand.net.nz/ |
---|
11 | * |
---|
12 | * libtrace is free software; you can redistribute it and/or modify |
---|
13 | * it under the terms of the GNU General Public License as published by |
---|
14 | * the Free Software Foundation; either version 2 of the License, or |
---|
15 | * (at your option) any later version. |
---|
16 | * |
---|
17 | * libtrace is distributed in the hope that it will be useful, |
---|
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
20 | * GNU General Public License for more details. |
---|
21 | * |
---|
22 | * You should have received a copy of the GNU General Public License |
---|
23 | * along with libtrace; if not, write to the Free Software |
---|
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
---|
25 | * |
---|
26 | * $Id: format_erf.c 1163 2007-03-23 04:41:03Z perry $ |
---|
27 | * |
---|
28 | */ |
---|
29 | #include "config.h" |
---|
30 | #include "common.h" |
---|
31 | #include "libtrace.h" |
---|
32 | #include "libtrace_int.h" |
---|
33 | #include "format_helper.h" |
---|
34 | |
---|
35 | #include <assert.h> |
---|
36 | #include <errno.h> |
---|
37 | #include <fcntl.h> |
---|
38 | #include <stdio.h> |
---|
39 | #include <string.h> |
---|
40 | #include <stdlib.h> |
---|
41 | |
---|
42 | static struct libtrace_format_t tshformat; |
---|
43 | |
---|
44 | #define DATA(x) ((struct tsh_format_data_t *)x->format_data) |
---|
45 | |
---|
46 | struct tsh_format_data_t { |
---|
47 | libtrace_io_t *file; |
---|
48 | }; |
---|
49 | |
---|
50 | typedef struct tsh_pkt_header_t { |
---|
51 | uint32_t seconds; |
---|
52 | LT_BITFIELD32 interface:8; |
---|
53 | LT_BITFIELD32 usecs:24; |
---|
54 | } tsh_pkt_header_t; |
---|
55 | |
---|
56 | static int tsh_get_framing_length(const libtrace_packet_t *packet) |
---|
57 | { |
---|
58 | return sizeof(tsh_pkt_header_t); |
---|
59 | } |
---|
60 | |
---|
61 | |
---|
62 | static int tsh_init_input(libtrace_t *libtrace) |
---|
63 | { |
---|
64 | libtrace->format_data = malloc(sizeof(struct tsh_format_data_t)); |
---|
65 | |
---|
66 | DATA(libtrace)->file = 0; |
---|
67 | |
---|
68 | return 0; /* success */ |
---|
69 | } |
---|
70 | |
---|
71 | static int tsh_start_input(libtrace_t *libtrace) |
---|
72 | { |
---|
73 | if (DATA(libtrace)->file) |
---|
74 | return 0; /* success */ |
---|
75 | |
---|
76 | DATA(libtrace)->file = trace_open_file(libtrace); |
---|
77 | |
---|
78 | if (!DATA(libtrace)->file) |
---|
79 | return -1; |
---|
80 | |
---|
81 | return 0; /* success */ |
---|
82 | } |
---|
83 | |
---|
84 | static int tsh_fin_input(libtrace_t *libtrace) { |
---|
85 | if (DATA(libtrace)->file) |
---|
86 | libtrace_io_close(DATA(libtrace)->file); |
---|
87 | free(libtrace->format_data); |
---|
88 | return 0; |
---|
89 | } |
---|
90 | |
---|
91 | static int tsh_read_packet(libtrace_t *libtrace, libtrace_packet_t *packet) { |
---|
92 | int numbytes; |
---|
93 | void *buffer2 = packet->buffer; |
---|
94 | |
---|
95 | if (!packet->buffer || packet->buf_control == TRACE_CTRL_EXTERNAL) { |
---|
96 | packet->buffer = malloc((size_t)LIBTRACE_PACKET_BUFSIZE); |
---|
97 | packet->buf_control = TRACE_CTRL_PACKET; |
---|
98 | if (!packet->buffer) { |
---|
99 | trace_set_err(libtrace, errno, |
---|
100 | "Cannot allocate memory"); |
---|
101 | return -1; |
---|
102 | } |
---|
103 | } |
---|
104 | |
---|
105 | packet->header = packet->buffer; |
---|
106 | packet->type = TRACE_RT_DATA_TSH; |
---|
107 | |
---|
108 | buffer2 = packet->buffer; |
---|
109 | |
---|
110 | /* Read the TSH header */ |
---|
111 | if ((numbytes=libtrace_io_read(DATA(libtrace)->file, |
---|
112 | buffer2, |
---|
113 | (size_t)sizeof(tsh_pkt_header_t))) == -1) { |
---|
114 | trace_set_err(libtrace,errno,"read(%s)", |
---|
115 | libtrace->uridata); |
---|
116 | return -1; |
---|
117 | } |
---|
118 | /* EOF */ |
---|
119 | if (numbytes == 0) { |
---|
120 | return 0; |
---|
121 | } |
---|
122 | |
---|
123 | buffer2+=numbytes; |
---|
124 | packet->payload = buffer2; |
---|
125 | |
---|
126 | /* Read the IP header */ |
---|
127 | if ((numbytes=libtrace_io_read(DATA(libtrace)->file, |
---|
128 | buffer2, |
---|
129 | (size_t)sizeof(libtrace_ip_t))) |
---|
130 | != sizeof(libtrace_ip_t)) { |
---|
131 | trace_set_err(libtrace,errno,"read(%s)", |
---|
132 | libtrace->uridata); |
---|
133 | return -1; |
---|
134 | } |
---|
135 | |
---|
136 | /* IP Options aren't captured in the trace, so leave room |
---|
137 | * for them, and put the transport header where it "should" be |
---|
138 | */ |
---|
139 | buffer2+=((libtrace_ip_t*)buffer2)->ip_hl*4; |
---|
140 | |
---|
141 | /* Read the transport header */ |
---|
142 | if ((numbytes=libtrace_io_read(DATA(libtrace)->file, |
---|
143 | buffer2, |
---|
144 | 16)) != 16) { |
---|
145 | trace_set_err(libtrace,errno,"read(%s)", |
---|
146 | libtrace->uridata); |
---|
147 | return -1; |
---|
148 | } |
---|
149 | |
---|
150 | return 80; |
---|
151 | } |
---|
152 | |
---|
153 | static libtrace_linktype_t tsh_get_link_type(const libtrace_packet_t *packet) { |
---|
154 | return TRACE_TYPE_NONE; |
---|
155 | } |
---|
156 | |
---|
157 | static libtrace_direction_t tsh_get_direction(const libtrace_packet_t *packet) { |
---|
158 | return ((tsh_pkt_header_t*)(packet->header))->interface; |
---|
159 | } |
---|
160 | |
---|
161 | static struct timeval tsh_get_timeval(const libtrace_packet_t *packet) |
---|
162 | { |
---|
163 | struct timeval tv; |
---|
164 | tv.tv_sec=((tsh_pkt_header_t*)(packet->header))->seconds; |
---|
165 | tv.tv_usec=((tsh_pkt_header_t*)(packet->header))->usecs; |
---|
166 | |
---|
167 | return tv; |
---|
168 | } |
---|
169 | |
---|
170 | int tsh_get_capture_length(const libtrace_packet_t *packet) { |
---|
171 | /* 16 bytes transport + 24 bytes IP, and we're missing the |
---|
172 | * IP options, but we'll pretend we have them |
---|
173 | */ |
---|
174 | return 16+((libtrace_ip_t*)packet->payload)->ip_hl*4; |
---|
175 | } |
---|
176 | |
---|
177 | static int tsh_get_wire_length(const libtrace_packet_t *packet) { |
---|
178 | return ((libtrace_ip_t*)packet->payload)->ip_len; |
---|
179 | } |
---|
180 | |
---|
181 | static void tsh_help(void) { |
---|
182 | printf("tsh format module: $Revision: 1163 $\n"); |
---|
183 | printf("Supported input URIs:\n"); |
---|
184 | printf("\ttsh:/path/to/file\t(uncompressed)\n"); |
---|
185 | printf("\ttsh:/path/to/file.gz\t(gzip-compressed)\n"); |
---|
186 | printf("\ttsh:-\t(stdin, either compressed or not)\n"); |
---|
187 | printf("\ttsh:/path/to/socket\n"); |
---|
188 | printf("\n"); |
---|
189 | printf("\te.g.: erf:/tmp/trace\n"); |
---|
190 | printf("\n"); |
---|
191 | } |
---|
192 | |
---|
193 | static struct libtrace_format_t tshformat = { |
---|
194 | "tsh", |
---|
195 | "$Id: format_erf.c 1163 2007-03-23 04:41:03Z perry $", |
---|
196 | TRACE_FORMAT_TSH, |
---|
197 | tsh_init_input, /* init_input */ |
---|
198 | NULL, /* config_input */ |
---|
199 | tsh_start_input, /* start_input */ |
---|
200 | NULL, /* pause_input */ |
---|
201 | NULL, /* init_output */ |
---|
202 | NULL, /* config_output */ |
---|
203 | NULL, /* start_output */ |
---|
204 | tsh_fin_input, /* fin_input */ |
---|
205 | NULL, /* fin_output */ |
---|
206 | tsh_read_packet, /* read_packet */ |
---|
207 | NULL, /* fin_packet */ |
---|
208 | NULL, /* write_packet */ |
---|
209 | tsh_get_link_type, /* get_link_type */ |
---|
210 | tsh_get_direction, /* get_direction */ |
---|
211 | NULL, /* set_direction */ |
---|
212 | NULL, /* get_erf_timestamp */ |
---|
213 | tsh_get_timeval, /* get_timeval */ |
---|
214 | NULL, /* get_seconds */ |
---|
215 | NULL, /* seek_erf */ |
---|
216 | NULL, /* seek_timeval */ |
---|
217 | NULL, /* seek_seconds */ |
---|
218 | tsh_get_capture_length, /* get_capture_length */ |
---|
219 | tsh_get_wire_length, /* get_wire_length */ |
---|
220 | tsh_get_framing_length, /* get_framing_length */ |
---|
221 | NULL, /* set_capture_length */ |
---|
222 | NULL, /* get_fd */ |
---|
223 | trace_event_trace, /* trace_event */ |
---|
224 | tsh_help, /* help */ |
---|
225 | NULL /* next pointer */ |
---|
226 | }; |
---|
227 | |
---|
228 | |
---|
229 | void tsh_constructor(void) { |
---|
230 | register_format(&tshformat); |
---|
231 | } |
---|