Annotation of embedaddon/libnet/src/libnet_build_ipsec.c, revision 1.1.1.3
1.1 misho 1: /*
1.1.1.2 misho 2: * $Id: libnet_build_ipsec.c,v 1.12 2004/04/13 17:32:28 mike Exp $
1.1 misho 3: *
4: * libnet
5: * libnet_build_ipsec.c - IP packet assembler
6: *
7: * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
8: * Copyright (c) 2002 Jose Nazario <jose@crimelabs.net>
9: * All rights reserved.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: */
33:
1.1.1.3 ! misho 34: #include "common.h"
1.1 misho 35:
36: libnet_ptag_t
1.1.1.2 misho 37: libnet_build_ipsec_esp_hdr(uint32_t spi, uint32_t seq, uint32_t iv,
38: const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
1.1 misho 39: {
1.1.1.2 misho 40: uint32_t n, h;
1.1 misho 41: libnet_pblock_t *p;
42: struct libnet_esp_hdr esp_hdr;
43:
44: if (l == NULL)
45: {
46: return (-1);
47: }
48:
49: n = LIBNET_IPSEC_ESP_HDR_H + payload_s;/* size of memory block */
50: h = 0;
51:
52: memset(&esp_hdr, 0, sizeof(esp_hdr));
53: esp_hdr.esp_spi = htonl(spi); /* SPI */
54: esp_hdr.esp_seq = htonl(seq); /* ESP sequence number */
55: esp_hdr.esp_iv = htonl(iv); /* initialization vector */
56:
57: /*
58: * Find the existing protocol block if a ptag is specified, or create
59: * a new one.
60: */
61: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_IPSEC_ESP_HDR_H);
62: if (p == NULL)
63: {
64: return (-1);
65: }
66:
1.1.1.2 misho 67: n = libnet_pblock_append(l, p, (uint8_t *)&esp_hdr, LIBNET_IPSEC_ESP_HDR_H);
1.1 misho 68: if (n == -1)
69: {
70: goto bad;
71: }
72:
1.1.1.2 misho 73: /* boilerplate payload sanity check / append macro */
74: LIBNET_DO_PAYLOAD(l, p);
1.1 misho 75:
76: return (ptag ? ptag : libnet_pblock_update(l, p, h,
77: LIBNET_PBLOCK_IPSEC_ESP_HDR_H));
78: bad:
79: libnet_pblock_delete(l, p);
80: return (-1);
81: }
82:
83:
84: libnet_ptag_t
1.1.1.2 misho 85: libnet_build_ipsec_esp_ftr(uint8_t len, uint8_t nh, int8_t *auth,
86: const uint8_t *payload, uint32_t payload_s, libnet_t *l,
1.1 misho 87: libnet_ptag_t ptag)
88: {
89: /* XXX we need to know the size of auth */
1.1.1.2 misho 90: uint32_t n, h;
1.1 misho 91: libnet_pblock_t *p;
92: struct libnet_esp_ftr esp_ftr;
93:
94: if (l == NULL)
95: {
96: return (-1);
97: }
98:
99: n = LIBNET_IPSEC_ESP_FTR_H + payload_s;/* size of memory block */
100: h = 0;
101:
102: memset(&esp_ftr, 0, sizeof(esp_ftr));
103: esp_ftr.esp_pad_len = len; /* pad length */
104: esp_ftr.esp_nh = nh; /* next header pointer */
105: esp_ftr.esp_auth = auth; /* authentication data */
106:
107: /*
108: * Find the existing protocol block if a ptag is specified, or create
109: * a new one.
110: */
111: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_IPSEC_ESP_FTR_H);
112: if (p == NULL)
113: {
114: return (-1);
115: }
116:
1.1.1.2 misho 117: n = libnet_pblock_append(l, p, (uint8_t *)&esp_ftr, LIBNET_IPSEC_ESP_FTR_H);
1.1 misho 118: if (n == -1)
119: {
120: goto bad;
121: }
122:
1.1.1.2 misho 123: /* boilerplate payload sanity check / append macro */
124: LIBNET_DO_PAYLOAD(l, p);
1.1 misho 125:
126: return (ptag ? ptag : libnet_pblock_update(l, p, h,
127: LIBNET_PBLOCK_IPSEC_ESP_FTR_H));
128: bad:
129: libnet_pblock_delete(l, p);
130: return (-1);
131: }
132:
133:
134: libnet_ptag_t
1.1.1.2 misho 135: libnet_build_ipsec_ah(uint8_t nh, uint8_t len, uint16_t res,
136: uint32_t spi, uint32_t seq, uint32_t auth, const uint8_t *payload,
137: uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
1.1 misho 138: {
1.1.1.2 misho 139: uint32_t n, h;
1.1 misho 140: libnet_pblock_t *p;
141: struct libnet_ah_hdr ah_hdr;
142:
143: if (l == NULL)
144: {
145: return (-1);
146: }
147:
148: n = LIBNET_IPSEC_AH_H + payload_s;/* size of memory block */
149: h = 0;
150:
151: /*
152: * Find the existing protocol block if a ptag is specified, or create
153: * a new one.
154: */
155: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_IPSEC_AH_H);
156: if (p == NULL)
157: {
158: return (-1);
159: }
160:
161: memset(&ah_hdr, 0, sizeof(ah_hdr));
162: ah_hdr.ah_nh = nh; /* next header */
163: ah_hdr.ah_len = len; /* length */
164: ah_hdr.ah_res = (res ? htons(res) : 0);
165: ah_hdr.ah_spi = htonl(spi); /* SPI */
166: ah_hdr.ah_seq = htonl(seq); /* AH sequence number */
167: ah_hdr.ah_auth = htonl(auth); /* authentication data */
168:
1.1.1.2 misho 169: n = libnet_pblock_append(l, p, (uint8_t *)&ah_hdr, LIBNET_IPSEC_AH_H);
1.1 misho 170: if (n == -1)
171: {
172: goto bad;
173: }
174:
1.1.1.2 misho 175: /* boilerplate payload sanity check / append macro */
176: LIBNET_DO_PAYLOAD(l, p);
1.1 misho 177:
178: return (ptag ? ptag : libnet_pblock_update(l, p, h,
179: LIBNET_PBLOCK_IPSEC_AH_H));
180: bad:
181: libnet_pblock_delete(l, p);
182: return (-1);
183: }
184:
1.1.1.3 ! misho 185: /**
! 186: * Local Variables:
! 187: * indent-tabs-mode: nil
! 188: * c-file-style: "stroustrup"
! 189: * End:
! 190: */
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