]>
git.ipfire.org Git - thirdparty/squid.git/blob - src/icmp/IcmpSquid.cc
4 * DEBUG: section 37 ICMP Routines
5 * AUTHOR: Duane Wessels, Amos Jeffries
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8 * ----------------------------------------------------------
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25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
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36 #include "icmp/IcmpSquid.h"
37 #include "icmp/net_db.h"
39 #include "SquidTime.h"
41 // Instance global to be available in main() and elsewhere.
58 IcmpSquid::IcmpSquid() : Icmp()
63 IcmpSquid::~IcmpSquid()
72 IcmpSquid::SendEcho(IpAddress
&to
, int opcode
, const char *payload
, int len
)
74 static pingerEchoData pecho
;
77 /** \li Does nothing if the pinger socket is not available. */
79 debugs(37, 2, HERE
<< " Socket Closed. Aborted send to " << pecho
.to
<< ", opcode " << opcode
<< ", len " << pecho
.psize
);
83 /** \li If no payload is given or is set as NULL it will ignore payload and len */
87 /** \li Otherwise if len is 0, uses strlen() to detect length of payload.
88 \bug This will result in part of the payload being truncated if it contains a NULL character.
89 \bug Or it may result in a buffer over-run if the payload is not nul-terminated properly.
91 else if (payload
&& len
== 0)
92 len
= strlen(payload
);
95 \bug If length specified or auto-detected is greater than the possible payload squid will die with an assert.
96 \todo This should perhapse be reduced to a truncated payload? or no payload. A WARNING is due anyway.
98 assert(len
<= PINGER_PAYLOAD_SZ
);
102 pecho
.opcode
= (unsigned char) opcode
;
107 xmemcpy(pecho
.payload
, payload
, len
);
109 slen
= sizeof(pingerEchoData
) - PINGER_PAYLOAD_SZ
+ pecho
.psize
;
111 debugs(37, 2, HERE
<< "to " << pecho
.to
<< ", opcode " << opcode
<< ", len " << pecho
.psize
);
113 x
= comm_udp_send(icmp_sock
, (char *)&pecho
, slen
, 0);
116 debugs(37, 1, HERE
<< "send: " << xstrerror());
118 /** \li If the send results in ECONNREFUSED or EPIPE errors from helper, will cleanly shutdown the module. */
119 /** \todo This should try restarting the helper a few times?? before giving up? */
120 if (errno
== ECONNREFUSED
|| errno
== EPIPE
) {
124 /** All other send errors are ignored. */
125 } else if (x
!= slen
) {
126 debugs(37, 1, HERE
<< "Wrote " << x
<< " of " << slen
<< " bytes");
130 // static Callback to wrap the squid-side ICMP handler.
131 // the IcmpSquid::Recv cannot be declared both static and virtual.
133 icmpSquidRecv(int unused1
, void *unused2
)
142 static int fail_count
= 0;
143 pingerReplyData preply
;
146 commSetSelect(icmp_sock
, COMM_SELECT_READ
, icmpSquidRecv
, NULL
, 0);
147 memset(&preply
, '\0', sizeof(pingerReplyData
));
148 n
= comm_udp_recv(icmp_sock
,
150 sizeof(pingerReplyData
),
153 if (n
< 0 && EAGAIN
!= errno
) {
154 debugs(37, 1, HERE
<< "recv: " << xstrerror());
156 if (errno
== ECONNREFUSED
)
159 if (errno
== ECONNRESET
)
162 if (++fail_count
== 10)
170 /** If its a test probe from the pinger. Do nothing. */
179 switch (preply
.opcode
) {
182 debugs(37,4, HERE
<< " ICMP_ECHO of " << preply
.from
<< " gave: hops=" << preply
.hops
<<", rtt=" << preply
.rtt
);
186 debugs(37,4, HERE
<< " DomainPing of " << preply
.from
<< " gave: hops=" << preply
.hops
<<", rtt=" << preply
.rtt
);
187 netdbHandlePingReply(F
, preply
.hops
, preply
.rtt
);
191 debugs(37, 1, HERE
<< "Bad opcode: " << preply
.opcode
<< " from " << F
);
196 #endif /* USE_ICMP */
199 IcmpSquid::DomainPing(IpAddress
&to
, const char *domain
)
202 debugs(37, 4, HERE
<< "'" << domain
<< "' (" << to
<< ")");
203 SendEcho(to
, S_ICMP_DOM
, domain
, 0);
208 IcmpSquid::Open(void)
216 /* User configured disabled. */
217 if (!Config
.pinger
.enable
) {
222 args
[0] = "(pinger)";
224 localhost
.SetLocalhost();
227 * Do NOT use IPC_DGRAM (=IPC_UNIX_DGRAM) here because you can't
228 * send() more than 4096 bytes on a socketpair() socket (at
231 pid
= ipcCreate(IPC_UDP_SOCKET
,
232 Config
.pinger
.program
,
247 fd_note(icmp_sock
, "pinger");
249 commSetSelect(icmp_sock
, COMM_SELECT_READ
, icmpSquidRecv
, NULL
, 0);
251 commSetTimeout(icmp_sock
, -1, NULL
, NULL
);
253 debugs(37, 1, HERE
<< "Pinger socket opened on FD " << icmp_sock
);
255 /* Tests the pinger immediately using localhost */
257 SendEcho(localhost
, S_ICMP_ECHO
, "ip6-localhost");
259 if (localhost
.SetIPv4())
260 SendEcho(localhost
, S_ICMP_ECHO
, "localhost");
264 debugs(37, 4, HERE
<< "Pinger handle: 0x" << std::hex
<< hIpc
<< std::dec
<< ", PID: " << pid
);
266 #endif /* _SQUID_MSWIN_ */
270 #endif /* USE_ICMP */
274 IcmpSquid::Close(void)
281 debugs(37, 1, HERE
<< "Closing Pinger socket on FD " << icmp_sock
);
285 send(icmp_sock
, (const void *) "$shutdown\n", 10, 0);
289 comm_close(icmp_sock
);
294 if (WaitForSingleObject(hIpc
, 12000) != WAIT_OBJECT_0
) {
296 debugs(37, 0, HERE
<< "WARNING: (pinger," << pid
<< ") didn't exit in 12 seconds");