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![Rémi Verschelde](/assets/img/avatar_default.png)
- The `cpu-features.{c,h}` code was only used by chance by the webm (libvpx) code, so I moved it there. It was actually introduced before that and wasn't in use, and libvpx just happened to be able to compile thanks to it being bundled. It could potentially be compiled on the fly from the Android NDK, but since we plan to replace the webm module by a GDNative plugin in the near future, I went the bundling route. - `ifaddrs_android.h` is already provided in the Android NDK as `ifaddrs.h`, same as on other Unixes. Yet we cannot use it until we up the min API level to 24, where `getifaddrs` is first defined. I moved the files to `thirdparty/misc` and synced them with upstream WebRTC (only indentation changes and removal of `static` qualifiers). Also removes dropped thirdparty files from COPYRIGHT.txt after changes in #24105 and #24145.
222 lines
7.1 KiB
C++
222 lines
7.1 KiB
C++
/*
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* libjingle
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* Copyright 2012, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "ifaddrs-android.h"
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/utsname.h>
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#include <sys/ioctl.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <unistd.h>
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#include <errno.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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struct netlinkrequest {
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nlmsghdr header;
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ifaddrmsg msg;
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};
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namespace {
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const int kMaxReadSize = 4096;
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};
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int set_ifname(struct ifaddrs* ifaddr, int interface) {
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char buf[IFNAMSIZ] = {0};
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char* name = if_indextoname(interface, buf);
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if (name == NULL) {
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return -1;
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}
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ifaddr->ifa_name = new char[strlen(name) + 1];
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strncpy(ifaddr->ifa_name, name, strlen(name) + 1);
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return 0;
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}
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int set_flags(struct ifaddrs* ifaddr) {
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int fd = socket(AF_INET, SOCK_DGRAM, 0);
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if (fd == -1) {
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return -1;
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}
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ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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strncpy(ifr.ifr_name, ifaddr->ifa_name, IFNAMSIZ - 1);
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int rc = ioctl(fd, SIOCGIFFLAGS, &ifr);
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close(fd);
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if (rc == -1) {
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return -1;
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}
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ifaddr->ifa_flags = ifr.ifr_flags;
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return 0;
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}
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int set_addresses(struct ifaddrs* ifaddr, ifaddrmsg* msg, void* data,
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size_t len) {
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if (msg->ifa_family == AF_INET) {
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sockaddr_in* sa = new sockaddr_in;
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sa->sin_family = AF_INET;
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memcpy(&sa->sin_addr, data, len);
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ifaddr->ifa_addr = reinterpret_cast<sockaddr*>(sa);
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} else if (msg->ifa_family == AF_INET6) {
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sockaddr_in6* sa = new sockaddr_in6;
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sa->sin6_family = AF_INET6;
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sa->sin6_scope_id = msg->ifa_index;
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memcpy(&sa->sin6_addr, data, len);
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ifaddr->ifa_addr = reinterpret_cast<sockaddr*>(sa);
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} else {
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return -1;
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}
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return 0;
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}
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int make_prefixes(struct ifaddrs* ifaddr, int family, int prefixlen) {
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char* prefix = NULL;
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if (family == AF_INET) {
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sockaddr_in* mask = new sockaddr_in;
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mask->sin_family = AF_INET;
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memset(&mask->sin_addr, 0, sizeof(in_addr));
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ifaddr->ifa_netmask = reinterpret_cast<sockaddr*>(mask);
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if (prefixlen > 32) {
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prefixlen = 32;
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}
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prefix = reinterpret_cast<char*>(&mask->sin_addr);
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} else if (family == AF_INET6) {
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sockaddr_in6* mask = new sockaddr_in6;
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mask->sin6_family = AF_INET6;
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memset(&mask->sin6_addr, 0, sizeof(in6_addr));
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ifaddr->ifa_netmask = reinterpret_cast<sockaddr*>(mask);
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if (prefixlen > 128) {
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prefixlen = 128;
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}
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prefix = reinterpret_cast<char*>(&mask->sin6_addr);
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} else {
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return -1;
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}
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for (int i = 0; i < (prefixlen / 8); i++) {
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*prefix++ = 0xFF;
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}
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char remainder = 0xff;
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remainder <<= (8 - prefixlen % 8);
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*prefix = remainder;
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return 0;
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}
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int populate_ifaddrs(struct ifaddrs* ifaddr, ifaddrmsg* msg, void* bytes,
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size_t len) {
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if (set_ifname(ifaddr, msg->ifa_index) != 0) {
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return -1;
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}
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if (set_flags(ifaddr) != 0) {
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return -1;
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}
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if (set_addresses(ifaddr, msg, bytes, len) != 0) {
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return -1;
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}
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if (make_prefixes(ifaddr, msg->ifa_family, msg->ifa_prefixlen) != 0) {
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return -1;
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}
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return 0;
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}
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int getifaddrs(struct ifaddrs** result) {
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int fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
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if (fd < 0) {
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return -1;
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}
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netlinkrequest ifaddr_request;
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memset(&ifaddr_request, 0, sizeof(ifaddr_request));
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ifaddr_request.header.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST;
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ifaddr_request.header.nlmsg_type = RTM_GETADDR;
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ifaddr_request.header.nlmsg_len = NLMSG_LENGTH(sizeof(ifaddrmsg));
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ssize_t count = send(fd, &ifaddr_request, ifaddr_request.header.nlmsg_len, 0);
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if (static_cast<size_t>(count) != ifaddr_request.header.nlmsg_len) {
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close(fd);
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return -1;
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}
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struct ifaddrs* start = NULL;
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struct ifaddrs* current = NULL;
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char buf[kMaxReadSize];
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ssize_t amount_read = recv(fd, &buf, kMaxReadSize, 0);
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while (amount_read > 0) {
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nlmsghdr* header = reinterpret_cast<nlmsghdr*>(&buf[0]);
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size_t header_size = static_cast<size_t>(amount_read);
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for ( ; NLMSG_OK(header, header_size);
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header = NLMSG_NEXT(header, header_size)) {
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switch (header->nlmsg_type) {
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case NLMSG_DONE:
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// Success. Return.
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*result = start;
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close(fd);
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return 0;
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case NLMSG_ERROR:
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close(fd);
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freeifaddrs(start);
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return -1;
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case RTM_NEWADDR: {
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ifaddrmsg* address_msg =
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reinterpret_cast<ifaddrmsg*>(NLMSG_DATA(header));
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rtattr* rta = IFA_RTA(address_msg);
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ssize_t payload_len = IFA_PAYLOAD(header);
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while (RTA_OK(rta, payload_len)) {
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if (rta->rta_type == IFA_ADDRESS) {
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int family = address_msg->ifa_family;
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if (family == AF_INET || family == AF_INET6) {
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ifaddrs* newest = new ifaddrs;
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memset(newest, 0, sizeof(ifaddrs));
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if (current) {
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current->ifa_next = newest;
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} else {
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start = newest;
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}
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if (populate_ifaddrs(newest, address_msg, RTA_DATA(rta),
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RTA_PAYLOAD(rta)) != 0) {
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freeifaddrs(start);
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*result = NULL;
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return -1;
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}
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current = newest;
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}
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}
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rta = RTA_NEXT(rta, payload_len);
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}
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break;
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}
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}
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}
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amount_read = recv(fd, &buf, kMaxReadSize, 0);
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}
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close(fd);
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freeifaddrs(start);
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return -1;
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}
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void freeifaddrs(struct ifaddrs* addrs) {
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struct ifaddrs* last = NULL;
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struct ifaddrs* cursor = addrs;
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while (cursor) {
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delete[] cursor->ifa_name;
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delete cursor->ifa_addr;
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delete cursor->ifa_netmask;
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last = cursor;
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cursor = cursor->ifa_next;
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delete last;
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}
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}
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