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Diffstat (limited to 'contrib/isc-dhcp/common/icmp.c')
| -rw-r--r-- | contrib/isc-dhcp/common/icmp.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/contrib/isc-dhcp/common/icmp.c b/contrib/isc-dhcp/common/icmp.c deleted file mode 100644 index fb6cfad970df2..0000000000000 --- a/contrib/isc-dhcp/common/icmp.c +++ /dev/null @@ -1,177 +0,0 @@ -/* icmp.c - - ICMP Protocol engine - for sending out pings and receiving - responses. */ - -/* - * Copyright (c) 1997, 1998 The Internet Software Consortium. - * 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. - * 3. Neither the name of The Internet Software Consortium nor the names - * of its contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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. - * - * This software has been written for the Internet Software Consortium - * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie - * Enterprises. To learn more about the Internet Software Consortium, - * see ``http://www.vix.com/isc''. To learn more about Vixie - * Enterprises, see ``http://www.vix.com''. - */ - -#ifndef lint -static char copyright[] = -"$Id: icmp.c,v 1.7.2.1 1998/06/25 21:11:29 mellon Exp $ Copyright (c) 1997, 1998 The Internet Software Consortium. All rights reserved.\n"; -#endif /* not lint */ - -#include "dhcpd.h" -#include "netinet/ip.h" -#include "netinet/ip_icmp.h" - -static int icmp_protocol_initialized; -static int icmp_protocol_fd; - -/* Initialize the ICMP protocol. */ - -void icmp_startup (routep, handler) - int routep; - void (*handler) PROTO ((struct iaddr, u_int8_t *, int)); -{ - struct protoent *proto; - int protocol = 1; - struct sockaddr_in from; - int fd; - int state; - - /* Only initialize icmp once. */ - if (icmp_protocol_initialized) - error ("attempted to reinitialize icmp protocol"); - icmp_protocol_initialized = 1; - - /* Get the protocol number (should be 1). */ - proto = getprotobyname ("icmp"); - if (proto) - protocol = proto -> p_proto; - - /* Get a raw socket for the ICMP protocol. */ - icmp_protocol_fd = socket (AF_INET, SOCK_RAW, protocol); - if (icmp_protocol_fd < 0) - error ("unable to create icmp socket: %m"); - - /* Make sure it does routing... */ - state = 0; - if (setsockopt (icmp_protocol_fd, SOL_SOCKET, SO_DONTROUTE, - (char *)&state, sizeof state) < 0) - error ("Unable to disable SO_DONTROUTE on ICMP socket: %m"); - - add_protocol ("icmp", icmp_protocol_fd, icmp_echoreply, - (void *)handler); -} - -int icmp_echorequest (addr) - struct iaddr *addr; -{ - struct sockaddr_in to; - struct icmp icmp; - int status; - - if (!icmp_protocol_initialized) - error ("attempt to use ICMP protocol before initialization."); - -#ifdef HAVE_SA_LEN - to.sin_len = sizeof to; -#endif - to.sin_family = AF_INET; - to.sin_port = 0; /* unused. */ - memcpy (&to.sin_addr, addr -> iabuf, sizeof to.sin_addr); /* XXX */ - - icmp.icmp_type = ICMP_ECHO; - icmp.icmp_code = 0; - icmp.icmp_cksum = 0; - icmp.icmp_seq = 0; -#ifdef PTRSIZE_64BIT - icmp.icmp_id = (((u_int32_t)(u_int64_t)addr) ^ - (u_int32_t)(((u_int64_t)addr) >> 32)); -#else - icmp.icmp_id = (u_int32_t)addr; -#endif - - icmp.icmp_cksum = wrapsum (checksum ((unsigned char *)&icmp, - sizeof icmp, 0)); - - /* Send the ICMP packet... */ - status = sendto (icmp_protocol_fd, (char *)&icmp, sizeof icmp, 0, - (struct sockaddr *)&to, sizeof to); - if (status < 0) - warn ("icmp_echorequest %s: %m", inet_ntoa(to.sin_addr)); - - if (status != sizeof icmp) - return 0; - return 1; -} - -void icmp_echoreply (protocol) - struct protocol *protocol; -{ - struct icmp *icfrom; - struct sockaddr_in from; - u_int8_t icbuf [1500]; - int status; - int len; - struct iaddr ia; - void (*handler) PROTO ((struct iaddr, u_int8_t *, int)); - - len = sizeof from; - status = recvfrom (protocol -> fd, (char *)icbuf, sizeof icbuf, 0, - (struct sockaddr *)&from, &len); - if (status < 0) { - warn ("icmp_echoreply: %m"); - return; - } - - /* Probably not for us. */ - if (status < (sizeof (struct ip)) + (sizeof *icfrom)) { - return; - } - - len = status - sizeof (struct ip); - icfrom = (struct icmp *)(icbuf + sizeof (struct ip)); - - /* Silently discard ICMP packets that aren't echoreplies. */ - if (icfrom -> icmp_type != ICMP_ECHOREPLY) { - return; - } - - /* If we were given a second-stage handler, call it. */ - if (protocol -> local) { - handler = ((void (*) PROTO ((struct iaddr, - u_int8_t *, int))) - protocol -> local); - memcpy (ia.iabuf, &from.sin_addr, sizeof from.sin_addr); - ia.len = sizeof from.sin_addr; - - (*handler) (ia, icbuf, len); - } -} |