diff options
Diffstat (limited to 'libnet/src/libnet_advanced.c')
| -rw-r--r-- | libnet/src/libnet_advanced.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/libnet/src/libnet_advanced.c b/libnet/src/libnet_advanced.c new file mode 100644 index 0000000..8e8f2ca --- /dev/null +++ b/libnet/src/libnet_advanced.c @@ -0,0 +1,136 @@ +/* + * $Id: libnet_advanced.c,v 1.7 2004/02/16 23:13:38 mike Exp $ + * + * libnet + * libnet_advanced.c - Advanced routines + * + * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.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 + +int +libnet_adv_cull_packet(libnet_t *l, u_int8_t **packet, u_int32_t *packet_s) +{ + *packet = NULL; + *packet_s = 0; + + if (l->injection_type != LIBNET_LINK_ADV) + { + snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, + "%s(): advanced link mode not enabled\n", __func__); + return (-1); + } + + /* checksums will be written in */ + return (libnet_pblock_coalesce(l, packet, packet_s)); +} + +int +libnet_adv_cull_header(libnet_t *l, libnet_ptag_t ptag, u_int8_t **header, + u_int32_t *header_s) +{ + libnet_pblock_t *p; + + *header = NULL; + *header_s = 0; + + if (l->injection_type != LIBNET_LINK_ADV) + { + snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, + "%s(): advanced link mode not enabled\n", __func__); + return (-1); + } + + p = libnet_pblock_find(l, ptag); + if (p == NULL) + { + snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, + "%s(): ptag not found, you sure it exists?\n", __func__); + return (-1); + } + *header = p->buf; + *header_s = p->b_len; + + return (1); +} + +int +libnet_adv_write_link(libnet_t *l, u_int8_t *packet, u_int32_t packet_s) +{ + int c; + + if (l->injection_type != LIBNET_LINK_ADV) + { + snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, + "%s(): advanced link mode not enabled\n", __func__); + return (-1); + } + c = libnet_write_link(l, packet, packet_s); + + /* do statistics */ + if (c == packet_s) + { + l->stats.packets_sent++; + l->stats.bytes_written += c; + } + else + { + l->stats.packet_errors++; + /* + * XXX - we probably should have a way to retrieve the number of + * bytes actually written (since we might have written something). + */ + if (c > 0) + { + l->stats.bytes_written += c; + } + } + return (c); +} + +void +libnet_adv_free_packet(libnet_t *l, u_int8_t *packet) +{ + /* + * Restore original pointer address so free won't complain about a + * modified chunk pointer. + */ + if (l->aligner > 0) + { + packet = packet - l->aligner; + } + free(packet); +} + +/* EOF */ |