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1 | /* |
2 | * $Id: libnet_advanced.c,v 1.20 2005/11/29 22:32:53 carlosc Exp $ | |
3 | * | |
4 | * libnet | |
5 | * libnet_advanced.c - Advanced routines | |
6 | * | |
7 | * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com> | |
8 | * All rights reserved. | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * 1. Redistributions of source code must retain the above copyright | |
14 | * notice, this list of conditions and the following disclaimer. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * | |
19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
29 | * SUCH DAMAGE. | |
30 | * | |
31 | */ | |
32 | ||
33 | #if (HAVE_CONFIG_H) | |
34 | #include "../include/config.h" | |
35 | #endif | |
36 | #if (!(_WIN32) || (__CYGWIN__)) | |
37 | #include "../include/libnet.h" | |
38 | #else | |
39 | #include "../include/win32/libnet.h" | |
40 | #endif | |
41 | ||
42 | int | |
43 | libnet_adv_cull_packet(libnet_t *l, u_int8_t **packet, u_int32_t *packet_s) | |
44 | { | |
45 | *packet = NULL; | |
46 | *packet_s = 0; | |
47 | ||
48 | if (l->injection_type != LIBNET_LINK_ADV) | |
49 | { | |
50 | snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, | |
51 | "%s(): advanced link mode not enabled\n", __func__); | |
52 | return (-1); | |
53 | } | |
54 | ||
55 | /* checksums will be written in */ | |
56 | return (libnet_pblock_coalesce(l, packet, packet_s)); | |
57 | } | |
58 | ||
59 | int | |
60 | libnet_adv_cull_header(libnet_t *l, libnet_ptag_t ptag, u_int8_t **header, | |
61 | u_int32_t *header_s) | |
62 | { | |
63 | libnet_pblock_t *p; | |
64 | ||
65 | *header = NULL; | |
66 | *header_s = 0; | |
67 | ||
68 | if (l->injection_type != LIBNET_LINK_ADV) | |
69 | { | |
70 | snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, | |
71 | "%s(): advanced link mode not enabled\n", __func__); | |
72 | return (-1); | |
73 | } | |
74 | ||
75 | p = libnet_pblock_find(l, ptag); | |
76 | if (p == NULL) | |
77 | { | |
78 | snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, | |
79 | "%s(): ptag not found, you sure it exists?\n", __func__); | |
80 | return (-1); | |
81 | } | |
82 | *header = p->buf; | |
83 | *header_s = p->b_len; | |
84 | ||
85 | return (1); | |
86 | } | |
87 | ||
88 | int | |
89 | libnet_adv_write_link(libnet_t *l, u_int8_t *packet, u_int32_t packet_s) | |
90 | { | |
91 | int c; | |
92 | ||
93 | if (l->injection_type != LIBNET_LINK_ADV) | |
94 | { | |
95 | snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, | |
96 | "%s(): advanced link mode not enabled\n", __func__); | |
97 | return (-1); | |
98 | } | |
99 | c = libnet_write_link(l, packet, packet_s); | |
100 | ||
101 | /* do statistics */ | |
102 | if (c == packet_s) | |
103 | { | |
104 | l->stats.packets_sent++; | |
105 | l->stats.bytes_written += c; | |
106 | } | |
107 | else | |
108 | { | |
109 | l->stats.packet_errors++; | |
110 | /* | |
111 | * XXX - we probably should have a way to retrieve the number of | |
112 | * bytes actually written (since we might have written something). | |
113 | */ | |
114 | if (c > 0) | |
115 | { | |
116 | l->stats.bytes_written += c; | |
117 | } | |
118 | } | |
119 | return (c); | |
120 | } | |
121 | ||
122 | void | |
123 | libnet_adv_free_packet(libnet_t *l, u_int8_t *packet) | |
124 | { | |
125 | /* | |
126 | * Restore original pointer address so free won't complain about a | |
127 | * modified chunk pointer. | |
128 | */ | |
129 | if (l->aligner > 0) | |
130 | { | |
131 | packet = packet - l->aligner; | |
132 | } | |
133 | free(packet); | |
134 | } | |
135 | ||
136 | /* EOF */ |