mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-09 20:54:40 +00:00
208 lines
4.8 KiB
C++
208 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim: set sw=2 ts=8 et ft=cpp: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "NfcConnector.h"
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#include <fcntl.h>
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#include <sys/un.h>
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#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, MOZ_COUNT_DTOR
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#include "nsThreadUtils.h" // For NS_IsMainThread.
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namespace mozilla {
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namespace ipc {
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NfcConnector::NfcConnector(const nsACString& aAddressString)
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: mAddressString(aAddressString)
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{
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MOZ_COUNT_CTOR_INHERITED(NfcConnector, UnixSocketConnector);
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}
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NfcConnector::~NfcConnector()
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{
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MOZ_COUNT_DTOR_INHERITED(NfcConnector, UnixSocketConnector);
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}
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nsresult
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NfcConnector::CreateSocket(int& aFd) const
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{
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aFd = socket(AF_LOCAL, SOCK_SEQPACKET, 0);
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if (aFd < 0) {
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NS_WARNING("Could not open NFC socket!");
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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nsresult
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NfcConnector::SetSocketFlags(int aFd) const
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{
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static const int sReuseAddress = 1;
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// Set close-on-exec bit.
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int flags = TEMP_FAILURE_RETRY(fcntl(aFd, F_GETFD));
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if (flags < 0) {
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return NS_ERROR_FAILURE;
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}
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flags |= FD_CLOEXEC;
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int res = TEMP_FAILURE_RETRY(fcntl(aFd, F_SETFD, flags));
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if (res < 0) {
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return NS_ERROR_FAILURE;
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}
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// Set non-blocking status flag.
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flags = TEMP_FAILURE_RETRY(fcntl(aFd, F_GETFL));
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if (flags < 0) {
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return NS_ERROR_FAILURE;
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}
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flags |= O_NONBLOCK;
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res = TEMP_FAILURE_RETRY(fcntl(aFd, F_SETFL, flags));
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if (res < 0) {
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return NS_ERROR_FAILURE;
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}
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// Set socket addr to be reused even if kernel is still waiting to close.
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res = setsockopt(aFd, SOL_SOCKET, SO_REUSEADDR, &sReuseAddress,
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sizeof(sReuseAddress));
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if (res < 0) {
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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nsresult
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NfcConnector::CreateAddress(struct sockaddr& aAddress,
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socklen_t& aAddressLength) const
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{
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static const size_t sNameOffset = 1;
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struct sockaddr_un* address =
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reinterpret_cast<struct sockaddr_un*>(&aAddress);
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size_t namesiz = mAddressString.Length() + 1; // include trailing '\0'
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if (NS_WARN_IF((sNameOffset + namesiz) > sizeof(address->sun_path))) {
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return NS_ERROR_FAILURE;
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}
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address->sun_family = AF_UNIX;
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memset(address->sun_path, '\0', sNameOffset); // abstract socket
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memcpy(address->sun_path + sNameOffset, mAddressString.get(), namesiz);
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aAddressLength =
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offsetof(struct sockaddr_un, sun_path) + sNameOffset + namesiz;
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return NS_OK;
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}
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// |UnixSocketConnector|
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//
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nsresult
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NfcConnector::ConvertAddressToString(const struct sockaddr& aAddress,
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socklen_t aAddressLength,
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nsACString& aAddressString)
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{
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MOZ_ASSERT(aAddress.sa_family == AF_UNIX);
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const struct sockaddr_un* un =
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reinterpret_cast<const struct sockaddr_un*>(&aAddress);
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size_t len = aAddressLength - offsetof(struct sockaddr_un, sun_path);
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aAddressString.Assign(un->sun_path, len);
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return NS_OK;
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}
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nsresult
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NfcConnector::CreateListenSocket(struct sockaddr* aAddress,
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socklen_t* aAddressLength,
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int& aListenFd)
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{
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ScopedClose fd;
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nsresult rv = CreateSocket(fd.rwget());
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if (NS_FAILED(rv)) {
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return rv;
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}
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rv = SetSocketFlags(fd);
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if (NS_FAILED(rv)) {
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return rv;
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}
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if (aAddress && aAddressLength) {
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rv = CreateAddress(*aAddress, *aAddressLength);
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if (NS_FAILED(rv)) {
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return rv;
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}
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}
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aListenFd = fd.forget();
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return NS_OK;
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}
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nsresult
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NfcConnector::AcceptStreamSocket(int aListenFd,
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struct sockaddr* aAddress,
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socklen_t* aAddressLength,
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int& aStreamFd)
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{
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ScopedClose fd(
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TEMP_FAILURE_RETRY(accept(aListenFd, aAddress, aAddressLength)));
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if (fd < 0) {
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NS_WARNING("Cannot accept file descriptor!");
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return NS_ERROR_FAILURE;
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}
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nsresult rv = SetSocketFlags(fd);
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if (NS_FAILED(rv)) {
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return rv;
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}
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aStreamFd = fd.forget();
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return NS_OK;
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}
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nsresult
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NfcConnector::CreateStreamSocket(struct sockaddr* aAddress,
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socklen_t* aAddressLength,
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int& aStreamFd)
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{
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ScopedClose fd;
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nsresult rv = CreateSocket(fd.rwget());
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if (NS_FAILED(rv)) {
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return rv;
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}
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rv = SetSocketFlags(fd);
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if (NS_FAILED(rv)) {
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return rv;
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}
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if (aAddress && aAddressLength) {
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rv = CreateAddress(*aAddress, *aAddressLength);
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if (NS_FAILED(rv)) {
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return rv;
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}
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}
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aStreamFd = fd.forget();
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return NS_OK;
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}
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nsresult
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NfcConnector::Duplicate(UnixSocketConnector*& aConnector)
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{
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aConnector = new NfcConnector(*this);
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return NS_OK;
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}
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}
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}
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