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Commit | Line | Data |
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10cefb7b | 1 | /* |
2 | * $Id$ | |
3 | * | |
4 | * DEBUG: section 54 Interprocess Communication | |
5 | * | |
6 | */ | |
7 | ||
8 | ||
9 | #include "config.h" | |
10 | #include "comm.h" | |
1bac0258 | 11 | #include "CommCalls.h" |
ec41b64c | 12 | #include "comm/Write.h" |
a67d2b2e | 13 | #include "base/TextException.h" |
10cefb7b | 14 | #include "ipc/UdsOp.h" |
15 | ||
10cefb7b | 16 | |
ba568924 | 17 | Ipc::UdsOp::UdsOp(const String& pathAddr): |
5667a628 AR |
18 | AsyncJob("Ipc::UdsOp"), |
19 | address(PathToAddress(pathAddr)), | |
20 | options(COMM_NONBLOCKING), | |
21 | fd_(-1) | |
10cefb7b | 22 | { |
ba568924 | 23 | debugs(54, 5, HERE << '[' << this << "] pathAddr=" << pathAddr); |
10cefb7b | 24 | } |
25 | ||
26 | Ipc::UdsOp::~UdsOp() | |
27 | { | |
28 | debugs(54, 5, HERE << '[' << this << ']'); | |
ba568924 | 29 | if (fd_ >= 0) |
10cefb7b | 30 | comm_close(fd_); |
31 | } | |
32 | ||
ba568924 | 33 | void Ipc::UdsOp::setOptions(int newOptions) |
10cefb7b | 34 | { |
ba568924 | 35 | options = newOptions; |
10cefb7b | 36 | } |
37 | ||
38 | int Ipc::UdsOp::fd() | |
39 | { | |
40 | if (fd_ < 0) { | |
ba568924 | 41 | if (options & COMM_DOBIND) |
1bac0258 AR |
42 | unlink(address.sun_path); |
43 | fd_ = comm_open_uds(SOCK_DGRAM, 0, &address, options); | |
ba568924 | 44 | Must(fd_ >= 0); |
10cefb7b | 45 | } |
46 | return fd_; | |
47 | } | |
48 | ||
ba568924 | 49 | void Ipc::UdsOp::setTimeout(int seconds, const char *handlerName) |
10cefb7b | 50 | { |
4299f876 | 51 | typedef CommCbMemFunT<UdsOp, CommTimeoutCbParams> Dialer; |
ba568924 | 52 | AsyncCall::Pointer handler = asyncCall(54,5, handlerName, |
4299f876 | 53 | Dialer(CbcPointer<UdsOp>(this), &UdsOp::noteTimeout)); |
ba568924 AR |
54 | commSetTimeout(fd(), seconds, handler); |
55 | } | |
56 | ||
57 | void Ipc::UdsOp::clearTimeout() | |
58 | { | |
59 | commSetTimeout(fd(), -1, NULL, NULL); // TODO: add Comm::ClearTimeout(fd) | |
60 | } | |
61 | ||
62 | void Ipc::UdsOp::noteTimeout(const CommTimeoutCbParams &) | |
63 | { | |
64 | timedout(); // our kid handles communication timeout | |
10cefb7b | 65 | } |
66 | ||
67 | ||
1bac0258 | 68 | struct sockaddr_un |
5667a628 | 69 | Ipc::PathToAddress(const String& pathAddr) { |
1bac0258 AR |
70 | assert(pathAddr.size() != 0); |
71 | struct sockaddr_un unixAddr; | |
72 | memset(&unixAddr, 0, sizeof(unixAddr)); | |
73 | unixAddr.sun_family = AF_LOCAL; | |
74 | xstrncpy(unixAddr.sun_path, pathAddr.termedBuf(), sizeof(unixAddr.sun_path)); | |
75 | return unixAddr; | |
76 | } | |
77 | ||
78 | ||
10cefb7b | 79 | CBDATA_NAMESPACED_CLASS_INIT(Ipc, UdsSender); |
80 | ||
1bac0258 | 81 | Ipc::UdsSender::UdsSender(const String& pathAddr, const TypedMsgHdr& aMessage): |
5667a628 AR |
82 | UdsOp(pathAddr), |
83 | message(aMessage), | |
84 | retries(10), // TODO: make configurable? | |
85 | timeout(10), // TODO: make configurable? | |
86 | writing(false) | |
10cefb7b | 87 | { |
1bac0258 | 88 | message.address(address); |
10cefb7b | 89 | } |
90 | ||
91 | void Ipc::UdsSender::start() | |
92 | { | |
ba568924 | 93 | UdsOp::start(); |
10cefb7b | 94 | write(); |
95 | if (timeout > 0) | |
ba568924 | 96 | setTimeout(timeout, "Ipc::UdsSender::noteTimeout"); |
10cefb7b | 97 | } |
98 | ||
ba568924 | 99 | bool Ipc::UdsSender::doneAll() const |
10cefb7b | 100 | { |
ba568924 | 101 | return !writing && UdsOp::doneAll(); |
10cefb7b | 102 | } |
103 | ||
104 | void Ipc::UdsSender::write() | |
105 | { | |
106 | debugs(54, 5, HERE); | |
4299f876 AR |
107 | typedef CommCbMemFunT<UdsSender, CommIoCbParams> Dialer; |
108 | AsyncCall::Pointer writeHandler = JobCallback(54, 5, | |
4cb2536f | 109 | Dialer, this, UdsSender::wrote); |
ec41b64c | 110 | Comm::Write(fd(), message.raw(), message.size(), writeHandler, NULL); |
ba568924 | 111 | writing = true; |
10cefb7b | 112 | } |
113 | ||
ba568924 | 114 | void Ipc::UdsSender::wrote(const CommIoCbParams& params) |
10cefb7b | 115 | { |
116 | debugs(54, 5, HERE << "FD " << params.fd << " flag " << params.flag << " [" << this << ']'); | |
ba568924 | 117 | writing = false; |
1bac0258 AR |
118 | if (params.flag != COMM_OK && retries-- > 0) { |
119 | sleep(1); // do not spend all tries at once; XXX: use an async timed event instead of blocking here; store the time when we started writing so that we do not sleep if not needed? | |
ba568924 | 120 | write(); // XXX: should we close on error so that fd() reopens? |
1bac0258 | 121 | } |
10cefb7b | 122 | } |
123 | ||
ba568924 | 124 | void Ipc::UdsSender::timedout() |
10cefb7b | 125 | { |
126 | debugs(54, 5, HERE); | |
ba568924 | 127 | mustStop("timedout"); |
10cefb7b | 128 | } |
129 | ||
130 | ||
1bac0258 | 131 | void Ipc::SendMessage(const String& toAddress, const TypedMsgHdr &message) |
10cefb7b | 132 | { |
4299f876 | 133 | AsyncJob::Start(new UdsSender(toAddress, message)); |
10cefb7b | 134 | } |