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(u_int8_t fc, u_int8_t *dst, u_int8_t *src, u_int8_t dsap,
43: u_int8_t ssap, u_int8_t cf, u_int8_t *org, u_int16_t type, u_int8_t *payload,
44: u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
45: {
46: u_int32_t n, h;
47: u_int16_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, (u_int8_t *)&fddi_hdr, LIBNET_FDDI_H);
94: if (n == -1)
95: {
96: goto bad;
97: }
98:
99: if ((payload && !payload_s) || (!payload && payload_s))
100: {
101: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
102: "%s(): payload inconsistency\n", __func__);
103: goto bad;
104: }
105:
106: if (payload && payload_s)
107: {
108: n = libnet_pblock_append(l, p, payload, payload_s);
109: if (n == -1)
110: {
111: goto bad;
112: }
113: }
114:
115: return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_FDDI_H));
116: bad:
117: libnet_pblock_delete(l, p);
118: return (-1);
119: }
120:
121:
122: libnet_ptag_t
123: libnet_autobuild_fddi(u_int8_t fc, u_int8_t *dst, u_int8_t dsap, u_int8_t ssap,
124: u_int8_t cf, u_int8_t *org, u_int16_t type, libnet_t *l)
125: {
126: u_int32_t n, h;
127: u_int16_t protocol_type;
128: struct libnet_fddi_addr *src;
129: libnet_pblock_t *p;
130: libnet_ptag_t ptag;
131: struct libnet_fddi_hdr fddi_hdr;
132:
133: if (l == NULL)
134: {
135: return (-1);
136: }
137:
138: /* sanity check injection type if we're not in advanced mode */
139: if (l->injection_type != LIBNET_LINK &&
140: !(((l->injection_type) & LIBNET_ADV_MASK)))
141: {
142: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
143: "%s(): called with non-link layer wire injection primitive",
144: __func__);
145: p = NULL;
146: goto bad;
147: }
148:
149: n = LIBNET_FDDI_H;
150: h = 0;
151: ptag = LIBNET_PTAG_INITIALIZER;
152:
153: /* FDDI and Ethernet have the same address size - so just typecast */
154: src = (struct libnet_fddi_addr *) libnet_get_hwaddr(l);
155: if (src == NULL)
156: {
157: /* err msg set in libnet_get_hwaddr() */
158: return (-1);
159: }
160:
161: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_FDDI_H);
162: if (p == NULL)
163: {
164: return (-1);
165: }
166:
167: memset(&fddi_hdr, 0, sizeof(fddi_hdr));
168: fddi_hdr.fddi_frame_control = fc; /* Class/Format/Priority */
169: memcpy(fddi_hdr.fddi_dhost, dst, FDDI_ADDR_LEN); /* destination fddi address */
170: memcpy(fddi_hdr.fddi_shost, src, FDDI_ADDR_LEN); /* source fddi address */
171: fddi_hdr.fddi_llc_dsap = dsap; /* */
172: fddi_hdr.fddi_llc_ssap = ssap; /* */
173: fddi_hdr.fddi_llc_control_field = cf; /* Class/Format/Priority */
174: memcpy(&fddi_hdr.fddi_llc_org_code, org, LIBNET_ORG_CODE_SIZE);
175:
176: /* Deal with unaligned int16_t for type */
177: protocol_type = htons(type);
178: memcpy(&fddi_hdr.fddi_type, &protocol_type, sizeof(int16_t)); /* Protocol Type */
179:
180: n = libnet_pblock_append(l, p, (u_int8_t *)&fddi_hdr, LIBNET_FDDI_H);
181: if (n == -1)
182: {
183: goto bad;
184: }
185:
186: return (libnet_pblock_update(l, p, h, LIBNET_PBLOCK_FDDI_H));
187: bad:
188: libnet_pblock_delete(l, p);
189: return (-1);
190: }
191: /* EOF */
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