| File: | var/lib/jenkins/workspace/firefox-scan-build/netwerk/base/NetworkInfoServiceLinux.cpp |
| Warning: | line 74, column 11 Although the value stored to 'family' is used in the enclosing expression, the value is never actually read from 'family' |
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| 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| 2 | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
| 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 6 | |
| 7 | #include <string.h> |
| 8 | #include <unistd.h> |
| 9 | #include <sys/ioctl.h> |
| 10 | #include <sys/socket.h> |
| 11 | #include <sys/types.h> |
| 12 | #include <net/if.h> |
| 13 | #include <netdb.h> |
| 14 | |
| 15 | #include "mozilla/DebugOnly.h" |
| 16 | #include "mozilla/ScopeExit.h" |
| 17 | |
| 18 | #include "NetworkInfoServiceImpl.h" |
| 19 | |
| 20 | namespace mozilla { |
| 21 | namespace net { |
| 22 | |
| 23 | static nsresult ListInterfaceAddresses(int aFd, const char* aIface, |
| 24 | AddrMapType& aAddrMap); |
| 25 | |
| 26 | nsresult DoListAddresses(AddrMapType& aAddrMap) { |
| 27 | int fd = socket(AF_INET2, SOCK_DGRAMSOCK_DGRAM, 0); |
| 28 | if (fd < 0) { |
| 29 | return NS_ERROR_FAILURE; |
| 30 | } |
| 31 | |
| 32 | auto autoCloseSocket = MakeScopeExit([&] { close(fd); }); |
| 33 | |
| 34 | struct ifconf ifconf; |
| 35 | /* 16k of space should be enough to list all interfaces. Worst case, if it's |
| 36 | * not then we will error out and fail to list addresses. This should only |
| 37 | * happen on pathological machines with way too many interfaces. |
| 38 | */ |
| 39 | char buf[16384]; |
| 40 | |
| 41 | ifconf.ifc_len = sizeof(buf); |
| 42 | ifconf.ifc_bufifc_ifcu.ifcu_buf = buf; |
| 43 | if (ioctl(fd, SIOCGIFCONF0x8912, &ifconf) != 0) { |
| 44 | return NS_ERROR_FAILURE; |
| 45 | } |
| 46 | |
| 47 | struct ifreq* ifreq = ifconf.ifc_reqifc_ifcu.ifcu_req; |
| 48 | int i = 0; |
| 49 | while (i < ifconf.ifc_len) { |
| 50 | size_t len = sizeof(struct ifreq); |
| 51 | |
| 52 | DebugOnly<nsresult> rv = |
| 53 | ListInterfaceAddresses(fd, ifreq->ifr_nameifr_ifrn.ifrn_name, aAddrMap); |
| 54 | NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "ListInterfaceAddresses failed")do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1 ))))) { NS_DebugBreak(NS_DEBUG_WARNING, "ListInterfaceAddresses failed" , "NS_SUCCEEDED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/base/NetworkInfoServiceLinux.cpp" , 54); } } while (false); |
| 55 | |
| 56 | ifreq = (struct ifreq*)((char*)ifreq + len); |
| 57 | i += len; |
| 58 | } |
| 59 | |
| 60 | return NS_OK; |
| 61 | } |
| 62 | |
| 63 | static nsresult ListInterfaceAddresses(int aFd, const char* aInterface, |
| 64 | AddrMapType& aAddrMap) { |
| 65 | struct ifreq ifreq; |
| 66 | memset(&ifreq, 0, sizeof(struct ifreq)); |
| 67 | strncpy(ifreq.ifr_nameifr_ifrn.ifrn_name, aInterface, IFNAMSIZ16 - 1); |
| 68 | if (ioctl(aFd, SIOCGIFADDR0x8915, &ifreq) != 0) { |
| 69 | return NS_ERROR_FAILURE; |
| 70 | } |
| 71 | |
| 72 | char host[128]; |
| 73 | int family; |
| 74 | switch (family = ifreq.ifr_addrifr_ifru.ifru_addr.sa_family) { |
Although the value stored to 'family' is used in the enclosing expression, the value is never actually read from 'family' | |
| 75 | case AF_INET2: |
| 76 | case AF_INET610: |
| 77 | getnameinfo(&ifreq.ifr_addrifr_ifru.ifru_addr, sizeof(ifreq.ifr_addrifr_ifru.ifru_addr), host, sizeof(host), |
| 78 | nullptr, 0, NI_NUMERICHOST1); |
| 79 | break; |
| 80 | case AF_UNSPEC0: |
| 81 | return NS_OK; |
| 82 | default: |
| 83 | // Unknown family. |
| 84 | return NS_OK; |
| 85 | } |
| 86 | |
| 87 | nsCString ifaceStr; |
| 88 | ifaceStr.AssignASCII(aInterface); |
| 89 | |
| 90 | nsCString addrStr; |
| 91 | addrStr.AssignASCII(host); |
| 92 | |
| 93 | aAddrMap.Put(ifaceStr, addrStr); |
| 94 | |
| 95 | return NS_OK; |
| 96 | } |
| 97 | |
| 98 | } // namespace net |
| 99 | } // namespace mozilla |