diff options
Diffstat (limited to 'libnet/src/libnet_build_token_ring.c')
| -rw-r--r-- | libnet/src/libnet_build_token_ring.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/libnet/src/libnet_build_token_ring.c b/libnet/src/libnet_build_token_ring.c new file mode 100644 index 0000000..7db6cfc --- /dev/null +++ b/libnet/src/libnet_build_token_ring.c @@ -0,0 +1,193 @@ +/* + * libnet + * libnet_build_token_ring.c - Token Ring (802.5) packet assembler + * + * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com> + * Jason Damron <jsdamron@hushmail.com> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#if (HAVE_CONFIG_H) +#include "../include/config.h" +#endif +#if (!(_WIN32) || (__CYGWIN__)) +#include "../include/libnet.h" +#else +#include "../include/win32/libnet.h" +#endif + +libnet_ptag_t +libnet_build_token_ring(u_int8_t ac, u_int8_t fc, u_int8_t *dst, u_int8_t *src, +u_int8_t dsap, u_int8_t ssap, u_int8_t cf, u_int8_t *org, u_int16_t type, +u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag) +{ + u_int32_t n, h; + libnet_pblock_t *p; + struct libnet_token_ring_hdr token_ring_hdr; + + if (l == NULL) + { + return (-1); + } + + /* sanity check injection type if we're not in advanced mode */ + if (l->injection_type != LIBNET_LINK && + !(((l->injection_type) & LIBNET_ADV_MASK))) + { + snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, + "%s(): called with non-link layer wire injection primitive\n", + __func__); + p = NULL; + goto bad; + } + + n = LIBNET_TOKEN_RING_H + payload_s; + h = 0; + + /* + * Find the existing protocol block if a ptag is specified, or create + * a new one. + */ + p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_TOKEN_RING_H); + if (p == NULL) + { + return (-1); + } + + memset(&token_ring_hdr, 0, sizeof(token_ring_hdr)); + token_ring_hdr.token_ring_access_control = ac; + token_ring_hdr.token_ring_frame_control = fc; + memcpy(token_ring_hdr.token_ring_dhost, dst, TOKEN_RING_ADDR_LEN); + memcpy(token_ring_hdr.token_ring_shost, src, TOKEN_RING_ADDR_LEN); + token_ring_hdr.token_ring_llc_dsap = dsap; + token_ring_hdr.token_ring_llc_ssap = ssap; + token_ring_hdr.token_ring_llc_control_field = cf; + memcpy(&token_ring_hdr.token_ring_llc_org_code, org, LIBNET_ORG_CODE_SIZE); + token_ring_hdr.token_ring_type = htons(type); + + n = libnet_pblock_append(l, p, (u_int8_t *)&token_ring_hdr, + LIBNET_TOKEN_RING_H); + if (n == -1) + { + goto bad; + } + + if ((payload && !payload_s) || (!payload && payload_s)) + { + snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, + "%s(): payload inconsistency\n", __func__); + goto bad; + } + + if (payload && payload_s) + { + n = libnet_pblock_append(l, p, payload, payload_s); + if (n == -1) + { + goto bad; + } + } + + return (ptag ? ptag : libnet_pblock_update(l, p, h, + LIBNET_PBLOCK_TOKEN_RING_H)); +bad: + libnet_pblock_delete(l, p); + return (-1); +} + + +libnet_ptag_t +libnet_autobuild_token_ring(u_int8_t ac, u_int8_t fc, u_int8_t *dst, +u_int8_t dsap, u_int8_t ssap, u_int8_t cf, u_int8_t *org, u_int16_t type, +libnet_t *l) +{ + u_int32_t n, h; + struct libnet_token_ring_addr *src; + libnet_pblock_t *p; + libnet_ptag_t ptag; + struct libnet_token_ring_hdr token_ring_hdr; + + if (l == NULL) + { + return (-1); + } + + /* sanity check injection type if we're not in advanced mode */ + if (l->injection_type != LIBNET_LINK && + !(((l->injection_type) & LIBNET_ADV_MASK))) + { + snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, + "%s(): called with non-link layer wire injection primitive\n", + __func__); + p = NULL; + goto bad; + } + + n = LIBNET_TOKEN_RING_H; + h = 0; + ptag = LIBNET_PTAG_INITIALIZER; + + /* Token Ring and Ethernet have the same address size - so just typecast */ + src = (struct libnet_token_ring_addr *) libnet_get_hwaddr(l); + if (src == NULL) + { + /* err msg set in libnet_get_hwaddr() */ + return (-1); + } + + /* + * Create a new pblock. + */ + p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_TOKEN_RING_H); + if (p == NULL) + { + return (-1); + } + + memset(&token_ring_hdr, 0, sizeof(token_ring_hdr)); + token_ring_hdr.token_ring_access_control = ac; + token_ring_hdr.token_ring_frame_control = fc; + memcpy(token_ring_hdr.token_ring_dhost, dst, TOKEN_RING_ADDR_LEN); + memcpy(token_ring_hdr.token_ring_shost, src, TOKEN_RING_ADDR_LEN); + token_ring_hdr.token_ring_llc_dsap = dsap; + token_ring_hdr.token_ring_llc_ssap = ssap; + token_ring_hdr.token_ring_llc_control_field = cf; + memcpy(&token_ring_hdr.token_ring_llc_org_code, org, LIBNET_ORG_CODE_SIZE); + token_ring_hdr.token_ring_type = htons(type); + + + n = libnet_pblock_append(l, p, (u_int8_t *)&token_ring_hdr, + LIBNET_TOKEN_RING_H); + if (n == -1) + { + goto bad; + } + + return (libnet_pblock_update(l, p, h, LIBNET_PBLOCK_TOKEN_RING_H)); +bad: + libnet_pblock_delete(l, p); + return (-1); +} +/* EOF */ |