]>
git.ipfire.org Git - thirdparty/squid.git/blob - src/icmp/Icmp4.cc
4 * DEBUG: section 42 ICMP Pinger program
5 * AUTHOR: Duane Wessels, Amos Jeffries
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8 * ----------------------------------------------------------
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34 //#define SQUID_HELPER 1
40 #include "SquidTime.h"
42 #include "IcmpPinger.h"
45 const char *icmpPktStr
[] = {
49 "Destination Unreachable",
66 Icmp4::Icmp4() : Icmp()
79 icmp_sock
= socket(PF_INET
, SOCK_RAW
, IPPROTO_ICMP
);
82 debugs(50, 0, HERE
<< " icmp_sock: " << xstrerror());
86 icmp_ident
= getpid() & 0xffff;
87 debugs(42, 1, "pinger: ICMP socket opened.");
93 Icmp4::SendEcho(Ip::Address
&to
, int opcode
, const char *payload
, int len
)
96 LOCAL_ARRAY(char, pkt
, MAX_PKT4_SZ
);
98 struct icmphdr
*icmp
= NULL
;
100 size_t icmp_pktsize
= sizeof(struct icmphdr
);
101 struct addrinfo
*S
= NULL
;
103 memset(pkt
, '\0', MAX_PKT4_SZ
);
105 icmp
= (struct icmphdr
*) (void *) pkt
;
108 * cevans - beware signed/unsigned issues in untrusted data from
115 // Construct ICMP packet header
116 icmp
->icmp_type
= ICMP_ECHO
;
118 icmp
->icmp_cksum
= 0;
119 icmp
->icmp_id
= icmp_ident
;
120 icmp
->icmp_seq
= (u_short
) icmp_pkts_sent
++;
122 // Construct ICMP packet data content
123 echo
= (icmpEchoData
*) (icmp
+ 1);
124 echo
->opcode
= (unsigned char) opcode
;
125 memcpy(&echo
->tv
, ¤t_time
, sizeof(struct timeval
));
127 icmp_pktsize
+= sizeof(struct timeval
) + sizeof(char);
130 if (len
> MAX_PAYLOAD
)
133 xmemcpy(echo
->payload
, payload
, len
);
138 icmp
->icmp_cksum
= CheckSum((u_short
*) icmp
, icmp_pktsize
);
141 ((sockaddr_in
*)S
->ai_addr
)->sin_port
= 0;
142 assert(icmp_pktsize
<= MAX_PKT4_SZ
);
144 debugs(42, 2, HERE
<< "Send ICMP packet to " << to
<< ".");
146 x
= sendto(icmp_sock
,
154 debugs(42, 1, HERE
<< "Error sending to ICMP packet to " << to
<< ". ERR: " << xstrerror());
157 Log(to
, ' ', NULL
, 0, 0);
164 struct addrinfo
*from
= NULL
;
165 int iphdrlen
= sizeof(iphdr
);
166 struct iphdr
*ip
= NULL
;
167 struct icmphdr
*icmp
= NULL
;
168 static char *pkt
= NULL
;
171 static pingerReplyData preply
;
174 debugs(42, 0, HERE
<< "No socket! Recv() should not be called.");
179 pkt
= (char *)xmalloc(MAX_PKT4_SZ
);
181 preply
.from
.InitAddrInfo(from
);
182 n
= recvfrom(icmp_sock
,
191 #if GETTIMEOFDAY_NO_TZP
197 gettimeofday(&now
, NULL
);
201 debugs(42, 8, HERE
<< n
<< " bytes from " << preply
.from
);
203 ip
= (struct iphdr
*) (void *) pkt
;
205 #if HAVE_STRUCT_IPHDR_IP_HL
207 iphdrlen
= ip
->ip_hl
<< 2;
209 #else /* HAVE_STRUCT_IPHDR_IP_HL */
212 iphdrlen
= (ip
->ip_vhl
>> 4) << 2;
216 iphdrlen
= (ip
->ip_vhl
& 0xF) << 2;
219 #endif /* HAVE_STRUCT_IPHDR_IP_HL */
221 icmp
= (struct icmphdr
*) (void *) (pkt
+ iphdrlen
);
223 if (icmp
->icmp_type
!= ICMP_ECHOREPLY
)
226 if (icmp
->icmp_id
!= icmp_ident
)
229 echo
= (icmpEchoData
*) (void *) (icmp
+ 1);
231 preply
.opcode
= echo
->opcode
;
233 preply
.hops
= ipHops(ip
->ip_ttl
);
236 memcpy(&tv
, &echo
->tv
, sizeof(struct timeval
));
237 preply
.rtt
= tvSubMsec(tv
, now
);
239 preply
.psize
= n
- iphdrlen
- (sizeof(icmpEchoData
) - MAX_PKT4_SZ
);
241 control
.SendResult(preply
, (sizeof(pingerReplyData
) - MAX_PKT4_SZ
+ preply
.psize
) );
243 Log(preply
.from
, icmp
->icmp_type
, icmpPktStr
[icmp
->icmp_type
], preply
.rtt
, preply
.hops
);
246 #endif /* USE_ICMP */