1: /*
2: * libnet
3: * libnet_build_fddi.c - Fiber Distributed Data Interface packet assembler
4: *
5: * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
6: * Jason Damron <jsdamron@hushmail.com>
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28: * SUCH DAMAGE.
29: *
30: */
31:
32: #if (HAVE_CONFIG_H)
33: #include "../include/config.h"
34: #endif
35: #if (!(_WIN32) || (__CYGWIN__))
36: #include "../include/libnet.h"
37: #else
38: #include "../include/win32/libnet.h"
39: #endif
40:
41: libnet_ptag_t
42: libnet_build_fddi(uint8_t fc, const uint8_t *dst, const uint8_t *src, uint8_t dsap,
43: uint8_t ssap, uint8_t cf, const uint8_t *org, uint16_t type, const uint8_t *payload,
44: uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
45: {
46: uint32_t n, h;
47: uint16_t protocol_type;
48: libnet_pblock_t *p;
49: struct libnet_fddi_hdr fddi_hdr;
50:
51: if (l == NULL)
52: {
53: return (-1);
54: }
55:
56: /* sanity check injection type if we're not in advanced mode */
57: if (l->injection_type != LIBNET_LINK &&
58: !(((l->injection_type) & LIBNET_ADV_MASK)))
59: {
60: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
61: "%s(): called with non-link layer wire injection primitive",
62: __func__);
63: p = NULL;
64: goto bad;
65: }
66:
67: n = LIBNET_FDDI_H + payload_s;
68: h = 0;
69:
70: /*
71: * Find the existing protocol block if a ptag is specified, or create
72: * a new one.
73: */
74: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_FDDI_H);
75: if (p == NULL)
76: {
77: return (-1);
78: }
79:
80: memset(&fddi_hdr, 0, sizeof(fddi_hdr));
81: fddi_hdr.fddi_frame_control = fc; /* Class/Format/Priority */
82: memcpy(fddi_hdr.fddi_dhost, dst, FDDI_ADDR_LEN); /* dst fddi address */
83: memcpy(fddi_hdr.fddi_shost, src, FDDI_ADDR_LEN); /* source fddi address */
84: fddi_hdr.fddi_llc_dsap = dsap; /* */
85: fddi_hdr.fddi_llc_ssap = ssap; /* */
86: fddi_hdr.fddi_llc_control_field = cf; /* Class/Format/Priority */
87: memcpy(&fddi_hdr.fddi_llc_org_code, org, LIBNET_ORG_CODE_SIZE);
88:
89: /* Deal with unaligned int16_t for type */
90: protocol_type = htons(type);
91: memcpy(&fddi_hdr.fddi_type, &protocol_type, sizeof(int16_t)); /* Protocol Type */
92:
93: n = libnet_pblock_append(l, p, (uint8_t *)&fddi_hdr, LIBNET_FDDI_H);
94: if (n == -1)
95: {
96: goto bad;
97: }
98:
99: /* boilerplate payload sanity check / append macro */
100: LIBNET_DO_PAYLOAD(l, p);
101:
102: return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_FDDI_H));
103: bad:
104: libnet_pblock_delete(l, p);
105: return (-1);
106: }
107:
108:
109: libnet_ptag_t
110: libnet_autobuild_fddi(uint8_t fc, const uint8_t *dst, uint8_t dsap, uint8_t ssap,
111: uint8_t cf, const uint8_t *org, uint16_t type, libnet_t *l)
112: {
113: uint32_t n, h;
114: uint16_t protocol_type;
115: struct libnet_fddi_addr *src;
116: libnet_pblock_t *p;
117: libnet_ptag_t ptag;
118: struct libnet_fddi_hdr fddi_hdr;
119:
120: if (l == NULL)
121: {
122: return (-1);
123: }
124:
125: /* sanity check injection type if we're not in advanced mode */
126: if (l->injection_type != LIBNET_LINK &&
127: !(((l->injection_type) & LIBNET_ADV_MASK)))
128: {
129: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
130: "%s(): called with non-link layer wire injection primitive",
131: __func__);
132: p = NULL;
133: goto bad;
134: }
135:
136: n = LIBNET_FDDI_H;
137: h = 0;
138: ptag = LIBNET_PTAG_INITIALIZER;
139:
140: /* FDDI and Ethernet have the same address size - so just typecast */
141: src = (struct libnet_fddi_addr *) libnet_get_hwaddr(l);
142: if (src == NULL)
143: {
144: /* err msg set in libnet_get_hwaddr() */
145: return (-1);
146: }
147:
148: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_FDDI_H);
149: if (p == NULL)
150: {
151: return (-1);
152: }
153:
154: memset(&fddi_hdr, 0, sizeof(fddi_hdr));
155: fddi_hdr.fddi_frame_control = fc; /* Class/Format/Priority */
156: memcpy(fddi_hdr.fddi_dhost, dst, FDDI_ADDR_LEN); /* destination fddi addr */
157: memcpy(fddi_hdr.fddi_shost, src, FDDI_ADDR_LEN); /* source fddi addr */
158: fddi_hdr.fddi_llc_dsap = dsap; /* */
159: fddi_hdr.fddi_llc_ssap = ssap; /* */
160: fddi_hdr.fddi_llc_control_field = cf; /* Class/Format/Priority */
161: memcpy(&fddi_hdr.fddi_llc_org_code, org, LIBNET_ORG_CODE_SIZE);
162:
163: /* Deal with unaligned int16_t for type */
164: protocol_type = htons(type);
165: memcpy(&fddi_hdr.fddi_type, &protocol_type, sizeof(int16_t));
166:
167: n = libnet_pblock_append(l, p, (uint8_t *)&fddi_hdr, LIBNET_FDDI_H);
168: if (n == -1)
169: {
170: goto bad;
171: }
172:
173: return (libnet_pblock_update(l, p, h, LIBNET_PBLOCK_FDDI_H));
174: bad:
175: libnet_pblock_delete(l, p);
176: return (-1);
177: }
178: /* EOF */
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