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network: support interface binding on Android
Signed-off-by: Mike Schore <mike.schore@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| #include "library/common/network/src_addr_socket_option_impl.h" | ||
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| #include "envoy/config/core/v3/base.pb.h" | ||
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| #include "source/common/common/assert.h" | ||
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| namespace Envoy { | ||
| namespace Network { | ||
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| SrcAddrSocketOptionImpl::SrcAddrSocketOptionImpl( | ||
| Network::Address::InstanceConstSharedPtr source_address) | ||
| : source_address_(std::move(source_address)) { | ||
| ASSERT(source_address_->type() == Network::Address::Type::Ip); | ||
| } | ||
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| bool SrcAddrSocketOptionImpl::setOption( | ||
| Network::Socket& socket, envoy::config::core::v3::SocketOption::SocketState state) const { | ||
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| if (state == envoy::config::core::v3::SocketOption::STATE_PREBIND) { | ||
| socket.connectionInfoProvider().setLocalAddress(source_address_); | ||
| } | ||
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| return true; | ||
| } | ||
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| /** | ||
| * Inserts an address, already in network order, to a byte array. | ||
| */ | ||
| template <typename T> void addressIntoVector(std::vector<uint8_t>& vec, const T& address) { | ||
| const uint8_t* byte_array = reinterpret_cast<const uint8_t*>(&address); | ||
| vec.insert(vec.end(), byte_array, byte_array + sizeof(T)); | ||
| } | ||
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| void SrcAddrSocketOptionImpl::hashKey(std::vector<uint8_t>& key) const { | ||
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| // Note: we're assuming that there cannot be a conflict between IPv6 addresses here. If an IPv4 | ||
| // address is mapped into an IPv6 address using an IPv4-Mapped IPv6 Address (RFC4921), then it's | ||
| // possible the hashes will be different despite the IP address used by the connection being | ||
| // the same. | ||
| if (source_address_->ip()->version() == Network::Address::IpVersion::v4) { | ||
| // note raw_address is already in network order | ||
| uint32_t raw_address = source_address_->ip()->ipv4()->address(); | ||
| addressIntoVector(key, raw_address); | ||
| } else if (source_address_->ip()->version() == Network::Address::IpVersion::v6) { | ||
| // note raw_address is already in network order | ||
| absl::uint128 raw_address = source_address_->ip()->ipv6()->address(); | ||
| addressIntoVector(key, raw_address); | ||
| } | ||
| } | ||
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| absl::optional<Network::Socket::Option::Details> SrcAddrSocketOptionImpl::getOptionDetails( | ||
| const Network::Socket&, envoy::config::core::v3::SocketOption::SocketState) const { | ||
| // no details for this option. | ||
| return absl::nullopt; | ||
| } | ||
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| } // namespace Network | ||
| } // namespace Envoy |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| #pragma once | ||
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| #include "envoy/config/core/v3/base.pb.h" | ||
| #include "envoy/network/address.h" | ||
| #include "envoy/network/listen_socket.h" | ||
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| namespace Envoy { | ||
| namespace Network { | ||
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| /** | ||
| * This is a "synthetic" socket option implementation, which sets the source IP/port of a socket | ||
| * using a provided IP address (and maybe port) during bind. | ||
| * | ||
| * Based on the OriginalSrcSocketOption extension. | ||
| */ | ||
| class SrcAddrSocketOptionImpl : public Network::Socket::Option { | ||
| public: | ||
| /** | ||
| * Constructs a socket option which will set the socket to use source @c source_address | ||
| */ | ||
| SrcAddrSocketOptionImpl(Network::Address::InstanceConstSharedPtr source_address); | ||
| ~SrcAddrSocketOptionImpl() override = default; | ||
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| /** | ||
| * Updates the source address of the socket to match `source_address_`. | ||
| * Adds socket options to the socket to allow this to work. | ||
| */ | ||
| bool setOption(Network::Socket& socket, | ||
| envoy::config::core::v3::SocketOption::SocketState state) const override; | ||
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| /** | ||
| * Appends a key which uniquely identifies the address being tracked. | ||
| */ | ||
| void hashKey(std::vector<uint8_t>& key) const override; | ||
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| absl::optional<Details> | ||
| getOptionDetails(const Network::Socket& socket, | ||
| envoy::config::core::v3::SocketOption::SocketState state) const override; | ||
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| private: | ||
| Network::Address::InstanceConstSharedPtr source_address_; | ||
| }; | ||
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| } // namespace Network | ||
| } // namespace Envoy |
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