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- /*
- * $Id: build_icmp.c,v 1.1.1.1 1999/05/18 15:33:42 dugsong Exp $
- *
- * libnet
- * build_icmp.c - ICMP packet assembler
- *
- * Copyright (c) 1998, 1999 Mike D. Schiffman <mike@infonexus.com>
- * route|daemon9 <route@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
- #include "../include/libnet.h"
-
- void
- build_icmp_echo(u_char type, u_char code, u_short id, u_short seq,
- const u_char *payload, int payload_s, u_char *buf)
- {
- struct libnet_icmp_hdr icmp_hdr;
-
- assert(buf);
-
- icmp_hdr.icmp_type = type; /* packet type */
- icmp_hdr.icmp_code = code; /* packet code */
- icmp_hdr.icmp_id = htons(id); /* packet id */
- icmp_hdr.icmp_seq = htons(seq); /* packet seq */
-
- if (payload && payload_s)
- {
- /*
- * Unchecked runtime error for buf + ICMP_H payload to be greater than
- * the allocated heap memory.
- */
- memcpy(buf + ICMP_H, payload, payload_s);
- }
- memcpy(buf, &icmp_hdr, sizeof(icmp_hdr));
- }
-
-
- void
- build_icmp_mask(u_char type, u_char code, u_short id, u_short seq, u_long mask,
- const u_char *payload, int payload_s, u_char *buf)
- {
- struct libnet_icmp_hdr icmp_hdr;
-
- assert(buf);
-
- icmp_hdr.icmp_type = type; /* packet type */
- icmp_hdr.icmp_code = code; /* packet code */
- icmp_hdr.icmp_id = htons(id); /* packet id */
- icmp_hdr.icmp_seq = htons(seq); /* packet seq */
- icmp_hdr.icmp_mask = htonl(mask); /* address mask */
-
- if (payload && payload_s)
- {
- /*
- * Unchecked runtime error for buf + ICMP_H payload to begreater than
- * the allocated heap memory.
- */
- memcpy(buf + ICMP_H, payload, payload_s);
- }
- memcpy(buf, &icmp_hdr, sizeof(icmp_hdr));
- }
-
-
- void
- build_icmp_unreach(u_char type, u_char code, u_short orig_len, u_char orig_tos,
- u_short orig_id, u_short orig_frag, u_char orig_ttl, u_char orig_prot,
- u_long orig_src, u_long orig_dst, const u_char *orig_payload, int
- payload_s, u_char *buf)
- {
- struct libnet_icmp_hdr icmp_hdr;
-
- assert(buf);
-
- icmp_hdr.icmp_type = type; /* packet type */
- icmp_hdr.icmp_code = code; /* packet code */
- icmp_hdr.icmp_id = 0; /* must be 0 */
- icmp_hdr.icmp_seq = 0; /* must be 0 */
-
- /*
- * How convenient! We can use our build_ip function to tack on the
- * original header!
- */
- build_ip(0, orig_tos, orig_id, orig_frag, orig_ttl, orig_prot, orig_src,
- orig_dst, orig_payload, payload_s, buf + ICMP_UNREACH_H);
-
- memcpy(buf, &icmp_hdr, ICMP_UNREACH_H);
- }
-
-
- void
- build_icmp_timeexceed(u_char type, u_char code, u_short orig_len,
- u_char orig_tos, u_short orig_id, u_short orig_frag, u_char orig_ttl,
- u_char orig_prot, u_long orig_src, u_long orig_dst,
- const u_char *orig_payload, int payload_s, u_char *buf)
- {
- struct libnet_icmp_hdr icmp_hdr;
-
- assert(buf);
-
- icmp_hdr.icmp_type = type; /* packet type */
- icmp_hdr.icmp_code = code; /* packet code */
- icmp_hdr.icmp_id = 0; /* must be 0 */
- icmp_hdr.icmp_seq = 0; /* must be 0 */
-
- /*
- * How convenient! We can use our build_ip function to tack on the
- * original header!
- */
- build_ip(0, orig_tos, orig_id, orig_frag, orig_ttl, orig_prot, orig_src,
- orig_dst, orig_payload, payload_s, buf + ICMP_TIMXCEED_H);
-
- memcpy(buf, &icmp_hdr, ICMP_TIMXCEED_H);
- }
-
-
- void
- build_icmp_timestamp(u_char type, u_char code, u_short id, u_short seq,
- n_time otime, n_time rtime, n_time ttime, const u_char *payload,
- int payload_s, u_char *buf)
- {
- struct libnet_icmp_hdr icmp_hdr;
-
- assert(buf);
-
- icmp_hdr.icmp_type = type; /* packet type */
- icmp_hdr.icmp_code = code; /* packet code */
- icmp_hdr.icmp_id = htons(id); /* packet id */
- icmp_hdr.icmp_seq = htons(seq); /* packet seq */
- icmp_hdr.icmp_otime = htonl(otime); /* original timestamp */
- icmp_hdr.icmp_rtime = htonl(rtime); /* receive timestamp */
- icmp_hdr.icmp_ttime = htonl(ttime); /* transmit timestamp */
-
- if (payload && payload_s)
- {
- /*
- * Unchecked runtime error for buf + ICMP_TS_H payload to be greater
- * than the allocated heap memory.
- */
- memcpy(buf + ICMP_TS_H, payload, payload_s);
- }
- memcpy(buf, &icmp_hdr, sizeof(icmp_hdr));
- }
-
- /* EOF */
-