Add m-esr52 at 52.6.0

1 files changed, 189 insertions, 0 deletions

diff --git a/netwerk/sctp/src/ifaddrs_android.cpp b/netwerk/sctp/src/ifaddrs_android.cpp
new file mode 100644
index 000000000..78eb90a1a
--- /dev/null
+++ b/netwerk/sctp/src/ifaddrs_android.cpp
@@ -0,0 +1,189 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "ifaddrs-android-ext.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include "ScopedFd.h"
+#include "LocalArray.h"
+
+// Returns a pointer to the first byte in the address data (which is
+// stored in network byte order).
+uint8_t* sockaddrBytes(int family, sockaddr_storage* ss) {
+    if (family == AF_INET) {
+        sockaddr_in* ss4 = reinterpret_cast<sockaddr_in*>(ss);
+        return reinterpret_cast<uint8_t*>(&ss4->sin_addr);
+    } else if (family == AF_INET6) {
+        sockaddr_in6* ss6 = reinterpret_cast<sockaddr_in6*>(ss);
+        return reinterpret_cast<uint8_t*>(&ss6->sin6_addr);
+    }
+    return NULL;
+}
+
+// Sadly, we can't keep the interface index for portability with BSD.
+// We'll have to keep the name instead, and re-query the index when
+// we need it later.
+bool ifa_setNameAndFlagsByIndex(ifaddrs *self, int interfaceIndex) {
+    // Get the name.
+    char buf[IFNAMSIZ];
+    char* name = if_indextoname(interfaceIndex, buf);
+    if (name == NULL) {
+        return false;
+    }
+    self->ifa_name = new char[strlen(name) + 1];
+    strcpy(self->ifa_name, name);
+
+    // Get the flags.
+    ScopedFd fd(socket(AF_INET, SOCK_DGRAM, 0));
+    if (fd.get() == -1) {
+        return false;
+    }
+    ifreq ifr;
+    memset(&ifr, 0, sizeof(ifr));
+    strcpy(ifr.ifr_name, name);
+    int rc = ioctl(fd.get(), SIOCGIFFLAGS, &ifr);
+    if (rc == -1) {
+        return false;
+    }
+    self->ifa_flags = ifr.ifr_flags;
+    return true;
+}
+
+// Netlink gives us the address family in the header, and the
+// sockaddr_in or sockaddr_in6 bytes as the payload. We need to
+// stitch the two bits together into the sockaddr that's part of
+// our portable interface.
+void ifa_setAddress(ifaddrs *self, int family, void* data, size_t byteCount) {
+    // Set the address proper...
+    sockaddr_storage* ss = new sockaddr_storage;
+    memset(ss, 0, sizeof(*ss));
+    self->ifa_addr = reinterpret_cast<sockaddr*>(ss);
+    ss->ss_family = family;
+    uint8_t* dst = sockaddrBytes(family, ss);
+    memcpy(dst, data, byteCount);
+}
+
+// Netlink gives us the prefix length as a bit count. We need to turn
+// that into a BSD-compatible netmask represented by a sockaddr*.
+void ifa_setNetmask(ifaddrs *self, int family, size_t prefixLength) {
+    // ...and work out the netmask from the prefix length.
+    sockaddr_storage* ss = new sockaddr_storage;
+    memset(ss, 0, sizeof(*ss));
+    self->ifa_netmask = reinterpret_cast<sockaddr*>(ss);
+    ss->ss_family = family;
+    uint8_t* dst = sockaddrBytes(family, ss);
+    memset(dst, 0xff, prefixLength / 8);
+    if ((prefixLength % 8) != 0) {
+        dst[prefixLength/8] = (0xff << (8 - (prefixLength % 8)));
+    }
+}
+
+// FIXME: use iovec instead.
+struct addrReq_struct {
+    nlmsghdr netlinkHeader;
+    ifaddrmsg msg;
+};
+
+inline bool sendNetlinkMessage(int fd, const void* data, size_t byteCount) {
+    ssize_t sentByteCount = TEMP_FAILURE_RETRY(send(fd, data, byteCount, 0));
+    return (sentByteCount == static_cast<ssize_t>(byteCount));
+}
+
+inline ssize_t recvNetlinkMessage(int fd, char* buf, size_t byteCount) {
+    return TEMP_FAILURE_RETRY(recv(fd, buf, byteCount, 0));
+}
+
+// Source-compatible with the BSD function.
+int getifaddrs(ifaddrs** result)
+{
+    // Simplify cleanup for callers.
+    *result = NULL;
+
+    // Create a netlink socket.
+    ScopedFd fd(socket(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE));
+    if (fd.get() < 0) {
+        return -1;
+    }
+
+    // Ask for the address information.
+    addrReq_struct addrRequest;
+    memset(&addrRequest, 0, sizeof(addrRequest));
+    addrRequest.netlinkHeader.nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH;
+    addrRequest.netlinkHeader.nlmsg_type = RTM_GETADDR;
+    addrRequest.netlinkHeader.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(addrRequest)));
+    addrRequest.msg.ifa_family = AF_UNSPEC; // All families.
+    addrRequest.msg.ifa_index = 0; // All interfaces.
+    if (!sendNetlinkMessage(fd.get(), &addrRequest, addrRequest.netlinkHeader.nlmsg_len)) {
+        return -1;
+    }
+
+    // Read the responses.
+    LocalArray<0> buf(65536); // We don't necessarily have std::vector.
+    ssize_t bytesRead;
+    while ((bytesRead  = recvNetlinkMessage(fd.get(), &buf[0], buf.size())) > 0) {
+        nlmsghdr* hdr = reinterpret_cast<nlmsghdr*>(&buf[0]);
+        for (; NLMSG_OK(hdr, (size_t)bytesRead); hdr = NLMSG_NEXT(hdr, bytesRead)) {
+            switch (hdr->nlmsg_type) {
+            case NLMSG_DONE:
+                return 0;
+            case NLMSG_ERROR:
+                return -1;
+            case RTM_NEWADDR:
+                {
+                    ifaddrmsg* address = reinterpret_cast<ifaddrmsg*>(NLMSG_DATA(hdr));
+                    rtattr* rta = IFA_RTA(address);
+                    size_t ifaPayloadLength = IFA_PAYLOAD(hdr);
+                    while (RTA_OK(rta, ifaPayloadLength)) {
+                        if (rta->rta_type == IFA_LOCAL) {
+                            int family = address->ifa_family;
+                            if (family == AF_INET || family == AF_INET6) {
+                                ifaddrs *next = *result;
+                                *result = new ifaddrs;
+                                memset(*result, 0, sizeof(ifaddrs));
+                                (*result)->ifa_next = next;
+                                if (!ifa_setNameAndFlagsByIndex(*result, address->ifa_index)) {
+                                    return -1;
+                                }
+                                ifa_setAddress(*result, family, RTA_DATA(rta), RTA_PAYLOAD(rta));
+                                ifa_setNetmask(*result, family, address->ifa_prefixlen);
+                            }
+                        }
+                        rta = RTA_NEXT(rta, ifaPayloadLength);
+                    }
+                }
+                break;
+            }
+        }
+    }
+    // We only get here if recv fails before we see a NLMSG_DONE.
+    return -1;
+}
+
+// Source-compatible with the BSD function.
+void freeifaddrs(ifaddrs* addresses) {
+    ifaddrs* self = addresses;
+    while (self != NULL) {
+        delete[] self->ifa_name;
+        delete self->ifa_addr;
+        delete self->ifa_netmask;
+        ifaddrs* next = self->ifa_next;
+        delete self;
+        self = next;
+    }
+}