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-rw-r--r--slirp/ip_icmp.c372
1 files changed, 0 insertions, 372 deletions
diff --git a/slirp/ip_icmp.c b/slirp/ip_icmp.c
deleted file mode 100644
index 2d50629..0000000
--- a/slirp/ip_icmp.c
+++ /dev/null
@@ -1,372 +0,0 @@
-/*
- * Copyright (c) 1982, 1986, 1988, 1993
- * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
- *
- * @(#)ip_icmp.c 8.2 (Berkeley) 1/4/94
- * ip_icmp.c,v 1.7 1995/05/30 08:09:42 rgrimes Exp
- */
-
-#include "slirp.h"
-#include "ip_icmp.h"
-
-struct icmpstat icmpstat;
-
-/* The message sent when emulating PING */
-/* Be nice and tell them it's just a psuedo-ping packet */
-char icmp_ping_msg[] = "This is a psuedo-PING packet used by Slirp to emulate ICMP ECHO-REQUEST packets.\n";
-
-/* list of actions for icmp_error() on RX of an icmp message */
-static int icmp_flush[19] = {
-/* ECHO REPLY (0) */ 0,
- 1,
- 1,
-/* DEST UNREACH (3) */ 1,
-/* SOURCE QUENCH (4)*/ 1,
-/* REDIRECT (5) */ 1,
- 1,
- 1,
-/* ECHO (8) */ 0,
-/* ROUTERADVERT (9) */ 1,
-/* ROUTERSOLICIT (10) */ 1,
-/* TIME EXCEEDED (11) */ 1,
-/* PARAMETER PROBLEM (12) */ 1,
-/* TIMESTAMP (13) */ 0,
-/* TIMESTAMP REPLY (14) */ 0,
-/* INFO (15) */ 0,
-/* INFO REPLY (16) */ 0,
-/* ADDR MASK (17) */ 0,
-/* ADDR MASK REPLY (18) */ 0
-};
-
-/*
- * Process a received ICMP message.
- */
-void
-icmp_input(m, hlen)
- MBuf m;
- int hlen;
-{
- register struct icmp *icp;
- register struct ip *ip=MBUF_TO(m, struct ip *);
- int icmplen=ip->ip_len;
- /* int code; */
-
- DEBUG_CALL("icmp_input");
- DEBUG_ARG("m = %lx", (long )m);
- DEBUG_ARG("m_len = %d", m->m_len);
-
- icmpstat.icps_received++;
-
- /*
- * Locate icmp structure in mbuf, and check
- * that its not corrupted and of at least minimum length.
- */
- if (icmplen < ICMP_MINLEN) { /* min 8 bytes payload */
- icmpstat.icps_tooshort++;
- freeit:
- mbuf_free(m);
- goto end_error;
- }
-
- m->m_len -= hlen;
- m->m_data += hlen;
- icp = MBUF_TO(m, struct icmp *);
- if (cksum(m, icmplen)) {
- icmpstat.icps_checksum++;
- goto freeit;
- }
- m->m_len += hlen;
- m->m_data -= hlen;
-
- /* icmpstat.icps_inhist[icp->icmp_type]++; */
- /* code = icp->icmp_code; */
-
- DEBUG_ARG("icmp_type = %d", icp->icmp_type);
- switch (icp->icmp_type) {
- case ICMP_ECHO:
- icp->icmp_type = ICMP_ECHOREPLY;
- ip->ip_len += hlen; /* since ip_input subtracts this */
- if (ip->ip_dst.s_addr == alias_addr.s_addr) {
- icmp_reflect(m);
- } else {
- struct socket *so;
- struct sockaddr_in addr;
- if ((so = socreate()) == NULL) goto freeit;
- if(udp_attach(so) == -1) {
- DEBUG_MISC((dfd,"icmp_input udp_attach errno = %d-%s\n",
- errno,strerror(errno)));
- sofree(so);
- mbuf_free(m);
- goto end_error;
- }
- so->so_m = m;
- so->so_faddr = ip->ip_dst;
- so->so_fport = htons(7);
- so->so_laddr = ip->ip_src;
- so->so_lport = htons(9);
- so->so_iptos = ip->ip_tos;
- so->so_type = IPPROTO_ICMP;
- so->so_state = SS_ISFCONNECTED;
-
- /* Send the packet */
- addr.sin_family = AF_INET;
- if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr) {
- /* It's an alias */
- int low = ntohl(so->so_faddr.s_addr) & 0xff;
-
- if (low >= CTL_DNS && low < CTL_DNS + dns_addr_count)
- addr.sin_addr = dns_addr[low - CTL_DNS];
- else
- addr.sin_addr = loopback_addr;
- } else {
- addr.sin_addr = so->so_faddr;
- }
- addr.sin_port = so->so_fport;
- if(sendto(so->s, icmp_ping_msg, strlen(icmp_ping_msg), 0,
- (struct sockaddr *)&addr, sizeof(addr)) == -1) {
- DEBUG_MISC((dfd,"icmp_input udp sendto tx errno = %d-%s\n",
- errno,strerror(errno)));
- icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));
- udp_detach(so);
- }
- } /* if ip->ip_dst.s_addr == alias_addr.s_addr */
- break;
- case ICMP_UNREACH:
- /* XXX? report error? close socket? */
- case ICMP_TIMXCEED:
- case ICMP_PARAMPROB:
- case ICMP_SOURCEQUENCH:
- case ICMP_TSTAMP:
- case ICMP_MASKREQ:
- case ICMP_REDIRECT:
- icmpstat.icps_notsupp++;
- mbuf_free(m);
- break;
-
- default:
- icmpstat.icps_badtype++;
- mbuf_free(m);
- } /* swith */
-
-end_error:
- /* m is mbuf_free()'d xor put in a socket xor or given to ip_send */
- return;
-}
-
-
-/*
- * Send an ICMP message in response to a situation
- *
- * RFC 1122: 3.2.2 MUST send at least the IP header and 8 bytes of header. MAY send more (we do).
- * MUST NOT change this header information.
- * MUST NOT reply to a multicast/broadcast IP address.
- * MUST NOT reply to a multicast/broadcast MAC address.
- * MUST reply to only the first fragment.
- */
-/*
- * Send ICMP_UNREACH back to the source regarding msrc.
- * mbuf *msrc is used as a template, but is NOT mbuf_free()'d.
- * It is reported as the bad ip packet. The header should
- * be fully correct and in host byte order.
- * ICMP fragmentation is illegal. All machines must accept 576 bytes in one
- * packet. The maximum payload is 576-20(ip hdr)-8(icmp hdr)=548
- */
-
-#define ICMP_MAXDATALEN (IP_MSS-28)
-void
-icmp_error(msrc, type, code, minsize, message)
- MBuf msrc;
- u_char type;
- u_char code;
- int minsize;
- char *message;
-{
- unsigned hlen, shlen, s_ip_len;
- register struct ip *ip;
- register struct icmp *icp;
- register MBuf m;
-
- DEBUG_CALL("icmp_error");
- DEBUG_ARG("msrc = %lx", (long )msrc);
- DEBUG_ARG("msrc_len = %d", msrc->m_len);
-
- if(type!=ICMP_UNREACH && type!=ICMP_TIMXCEED) goto end_error;
-
- /* check msrc */
- if(!msrc) goto end_error;
- ip = MBUF_TO(msrc, struct ip *);
-#if DEBUG
- { char bufa[20], bufb[20];
- strcpy(bufa, inet_ntoa(ip->ip_src));
- strcpy(bufb, inet_ntoa(ip->ip_dst));
- DEBUG_MISC((dfd, " %.16s to %.16s\n", bufa, bufb));
- }
-#endif
- if(ip->ip_off & IP_OFFMASK) goto end_error; /* Only reply to fragment 0 */
-
- shlen=ip->ip_hl << 2;
- s_ip_len=ip->ip_len;
- if(ip->ip_p == IPPROTO_ICMP) {
- icp = (struct icmp *)((char *)ip + shlen);
- /*
- * Assume any unknown ICMP type is an error. This isn't
- * specified by the RFC, but think about it..
- */
- if(icp->icmp_type>18 || icmp_flush[icp->icmp_type]) goto end_error;
- }
-
- /* make a copy */
- if(!(m=mbuf_alloc())) goto end_error; /* get mbuf */
- { int new_m_size;
- new_m_size=sizeof(struct ip )+ICMP_MINLEN+msrc->m_len+ICMP_MAXDATALEN;
- if(new_m_size>m->m_size) mbuf_ensure(m, new_m_size);
- }
- memcpy(m->m_data, msrc->m_data, msrc->m_len);
- m->m_len = msrc->m_len; /* copy msrc to m */
-
- /* make the header of the reply packet */
- ip = MBUF_TO(m, struct ip *);
- hlen= sizeof(struct ip ); /* no options in reply */
-
- /* fill in icmp */
- m->m_data += hlen;
- m->m_len -= hlen;
-
- icp = MBUF_TO(m, struct icmp *);
-
- if(minsize) s_ip_len=shlen+ICMP_MINLEN; /* return header+8b only */
- else if(s_ip_len>ICMP_MAXDATALEN) /* maximum size */
- s_ip_len=ICMP_MAXDATALEN;
-
- m->m_len=ICMP_MINLEN+s_ip_len; /* 8 bytes ICMP header */
-
- /* min. size = 8+sizeof(struct ip)+8 */
-
- icp->icmp_type = type;
- icp->icmp_code = code;
- icp->icmp_id = 0;
- icp->icmp_seq = 0;
-
- memcpy(&icp->icmp_ip, msrc->m_data, s_ip_len); /* report the ip packet */
- HTONS(icp->icmp_ip.ip_len);
- HTONS(icp->icmp_ip.ip_id);
- HTONS(icp->icmp_ip.ip_off);
-
-#if DEBUG
- if(message) { /* DEBUG : append message to ICMP packet */
- int message_len;
- char *cpnt;
- message_len=strlen(message);
- if(message_len>ICMP_MAXDATALEN) message_len=ICMP_MAXDATALEN;
- cpnt=(char *)m->m_data+m->m_len;
- memcpy(cpnt, message, message_len);
- m->m_len+=message_len;
- }
-#endif
-
- icp->icmp_cksum = 0;
- icp->icmp_cksum = cksum(m, m->m_len);
-
- m->m_data -= hlen;
- m->m_len += hlen;
-
- /* fill in ip */
- ip->ip_hl = hlen >> 2;
- ip->ip_len = m->m_len;
-
- ip->ip_tos=((ip->ip_tos & 0x1E) | 0xC0); /* high priority for errors */
-
- ip->ip_ttl = MAXTTL;
- ip->ip_p = IPPROTO_ICMP;
- ip->ip_dst = ip->ip_src; /* ip adresses */
- ip->ip_src = alias_addr;
-
- (void ) ip_output((struct socket *)NULL, m);
-
- icmpstat.icps_reflect++;
-
-end_error:
- return;
-}
-#undef ICMP_MAXDATALEN
-
-/*
- * Reflect the ip packet back to the source
- */
-void
-icmp_reflect(m)
- MBuf m;
-{
- register struct ip *ip = MBUF_TO(m, struct ip *);
- int hlen = ip->ip_hl << 2;
- int optlen = hlen - sizeof(struct ip );
- register struct icmp *icp;
-
- /*
- * Send an icmp packet back to the ip level,
- * after supplying a checksum.
- */
- m->m_data += hlen;
- m->m_len -= hlen;
- icp = MBUF_TO(m, struct icmp *);
-
- icp->icmp_cksum = 0;
- icp->icmp_cksum = cksum(m, ip->ip_len - hlen);
-
- m->m_data -= hlen;
- m->m_len += hlen;
-
- /* fill in ip */
- if (optlen > 0) {
- /*
- * Strip out original options by copying rest of first
- * mbuf's data back, and adjust the IP length.
- */
- memmove((caddr_t)(ip + 1), (caddr_t)ip + hlen,
- (unsigned )(m->m_len - hlen));
- hlen -= optlen;
- ip->ip_hl = hlen >> 2;
- ip->ip_len -= optlen;
- m->m_len -= optlen;
- }
-
- ip->ip_ttl = MAXTTL;
- { /* swap */
- struct in_addr icmp_dst;
- icmp_dst = ip->ip_dst;
- ip->ip_dst = ip->ip_src;
- ip->ip_src = icmp_dst;
- }
-
- (void ) ip_output((struct socket *)NULL, m);
-
- icmpstat.icps_reflect++;
-}
generated by cgit v1.1 at 2024-12-22 17:21:20 +0000