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989 lines
22 KiB
C++
989 lines
22 KiB
C++
#include <llarp/crypto_async.h>
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#include <llarp/iwp.h>
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#include <llarp/net.h>
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#include <llarp/time.h>
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#include <bitset>
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#include <cassert>
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#include <fstream>
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#include <list>
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#include <map>
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#include <mutex>
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#include <queue>
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#include <set>
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#include <vector>
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#include "crypto.hpp"
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#include "fs.hpp"
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#include "mem.hpp"
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#include "net.hpp"
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namespace iwp
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{
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// session activity timeout is 10s
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constexpr llarp_time_t SESSION_TIMEOUT = 10000;
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enum header_flag
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{
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eSessionInvalidated = (1 << 0),
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eHighPacketDrop = (1 << 1),
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eHighMTUDetected = (1 << 2),
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eProtoUpgrade = (1 << 3)
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};
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enum msgtype
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{
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eALIV = 0x00,
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eXMIT = 0x01,
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eACKS = 0x02,
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eFRAG = 0x03
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};
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/** plaintext frame header */
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struct frame_header
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{
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uint8_t *ptr;
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frame_header(uint8_t *buf) : ptr(buf)
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{
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}
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uint8_t *
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data()
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{
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return ptr + 4;
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}
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uint8_t &
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version()
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{
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return ptr[0];
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}
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uint8_t &
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msgtype()
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{
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return ptr[1];
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}
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// 12 bits
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uint16_t
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size() const
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{
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uint16_t sz = (ptr[3] | 0x00fc) << 8;
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sz |= ptr[2];
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return sz;
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}
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void
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setsize(uint16_t sz)
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{
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ptr[3] = (sz | 0xfc00) >> 8;
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ptr[2] = (sz | 0x00ff);
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}
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// 4 bits
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uint8_t
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flags() const
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{
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return ptr[3] & 0x07;
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}
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void
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setflag(header_flag f)
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{
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ptr[3] |= f;
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}
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};
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/** xmit header */
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struct xmit
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{
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uint32_t buffer[11];
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xmit()
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{
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}
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xmit(uint8_t *ptr)
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{
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memcpy(buffer, ptr, 44);
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}
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xmit(const xmit &other)
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{
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memcpy(buffer, other.buffer, 44);
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}
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uint64_t
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msgid() const
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{
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// big endian assumed
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// TODO: implement little endian
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const uint32_t *start = (buffer + 8);
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const uint64_t *msgid = (const uint64_t *)start;
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return *msgid;
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}
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// size of each full fragment
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uint16_t
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fragsize() const
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{
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// big endian assumed
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// TODO: implement little endian
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return ((buffer[10] & 0xfc000000) >> 20);
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}
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// number of full fragments
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uint8_t
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numfrags() const
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{
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return (buffer[10] & 0x07000000) >> 16;
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}
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// size of the entire message
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size_t
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totalsize() const
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{
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return (fragsize() * numfrags()) + lastfrag();
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}
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// size of the last fragment
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uint8_t
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lastfrag() const
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{
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// big endian assumed
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// TODO: implement little endian
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return (buffer[10] & 0x0000ff00) >> 8;
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}
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uint8_t
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flags() const
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{
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// big endian assumed
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// TODO: implement little endian
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return (buffer[10] & 0x000000ff);
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}
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};
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typedef std::vector< uint8_t > fragment_t;
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// forward declare
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struct session;
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struct transitframe
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{
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session *parent = nullptr;
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xmit msginfo;
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std::bitset< 16 > status;
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std::map< uint16_t, fragment_t > frags;
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fragment_t lastfrag;
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transitframe()
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{
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}
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// inbound
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transitframe(const xmit &x) : msginfo(x)
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{
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}
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// outbound
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transitframe(const llarp_buffer_t &buf, session *s) : parent(s)
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{
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}
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void
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put_lastfrag(uint8_t *buf, size_t sz)
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{
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lastfrag.resize(sz);
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memcpy(lastfrag.data(), buf, sz);
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}
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};
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struct frame_state
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{
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uint64_t ids = 0;
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llarp_time_t lastEvent = 0;
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std::map< uint64_t, transitframe > rx;
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std::map< uint64_t, transitframe * > tx;
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typedef std::vector< uint8_t > sendbuf_t;
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std::queue< sendbuf_t > sendqueue;
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void
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init_sendbuf(sendbuf_t &buf, msgtype t, uint16_t sz, uint8_t flags)
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{
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buf.resize(4 + sz);
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buf[0] = 0;
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buf[1] = t;
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buf[2] = (sz & 0x00ff);
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buf[3] = flags;
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}
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void
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push_ackfor(uint64_t id, uint16_t bitmask)
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{
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sendbuf_t buf;
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// TODO: set flags to nonzero as needed
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init_sendbuf(buf, eACKS, 10, 0);
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// TODO: this assumes big endian
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memcpy(buf.data() + 4, &id, 8);
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memcpy(buf.data() + 12, &bitmask, 2);
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sendqueue.push(buf);
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}
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bool
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got_xmit(frame_header &hdr, size_t sz)
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{
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if(hdr.size() > sz)
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{
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// overflow
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printf("invalid XMIT frame size\n");
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return false;
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}
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sz = hdr.size();
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// mark we are alive
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alive();
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// extract xmit data
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xmit x(hdr.data());
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if(sz - 44 != x.lastfrag())
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{
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// bad size of last fragment
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printf("XMIT frag size missmatch, %ld != %d\n", sz - 44, x.lastfrag());
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return false;
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}
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// check MSB set on flags
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if(x.flags() & 0x80)
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{
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if(x.numfrags() > 0)
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{
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auto itr = rx.try_emplace(x.msgid(), x);
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if(itr.second)
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{
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// inserted, put last fragment
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itr.first->second.put_lastfrag(hdr.data() + 44, x.lastfrag());
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return true;
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}
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else
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printf("duplicate XMIT msgid=%ld\n", x.msgid());
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}
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else
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{
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// short XMIT , no fragments so just ack
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push_ackfor(x.msgid(), 0);
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}
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}
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else
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printf("XMIT flags MSB not set\n");
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return false;
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}
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void
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alive()
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{
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lastEvent = llarp_time_now_ms();
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}
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bool
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got_frag(frame_header &hdr, size_t sz)
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{
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return false;
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}
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bool
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got_acks(frame_header &hdr, size_t sz)
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{
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return false;
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}
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// queue new outbound message
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void
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queue_tx(transitframe *frame)
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{
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ids++;
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tx.try_emplace(ids, frame);
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}
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// get next frame to encrypt and transmit
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bool
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next_frame(llarp_buffer_t &buf)
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{
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if(sendqueue.size())
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{
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auto &send = sendqueue.front();
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buf.base = send.data();
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buf.cur = send.data();
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buf.sz = send.size();
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return true;
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}
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return false;
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}
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void
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pop_next_frame()
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{
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sendqueue.pop();
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}
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bool
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process(uint8_t *buf, size_t sz)
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{
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frame_header hdr(buf);
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switch(hdr.msgtype())
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{
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case eALIV:
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alive();
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return true;
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case eXMIT:
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return got_xmit(hdr, sz - 4);
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case eACKS:
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return got_acks(hdr, sz - 4);
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case eFRAG:
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return got_frag(hdr, sz - 4);
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default:
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return false;
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}
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}
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};
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struct session
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{
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llarp_alloc *mem;
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llarp_msg_muxer *muxer;
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llarp_udp_io *udp;
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llarp_crypto *crypto;
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llarp_async_iwp *iwp;
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llarp_logic *logic;
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llarp_seckey_t eph_seckey;
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llarp_pubkey_t remote;
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llarp_sharedkey_t sessionkey;
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llarp_link_establish_job *establish_job = nullptr;
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llarp::Addr addr;
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iwp_async_intro intro;
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iwp_async_introack introack;
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iwp_async_session_start start;
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frame_state frame;
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byte_t token[32];
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byte_t workbuf[2048];
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enum State
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{
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eInitial,
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eIntroSent,
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eIntroAckSent,
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eIntroAckRecv,
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eEstablished,
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eTimeout
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};
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State state;
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session(llarp_alloc *m, llarp_msg_muxer *mux, llarp_udp_io *u,
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llarp_async_iwp *i, llarp_crypto *c, llarp_logic *l,
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const llarp::Addr &a)
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: mem(m)
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, muxer(mux)
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, udp(u)
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, crypto(c)
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, iwp(i)
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, logic(l)
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, addr(a)
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, state(eInitial)
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{
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c->keygen(eph_seckey);
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}
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~session()
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{
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printf("~session()\n");
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}
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static void
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handle_sendto(void *user)
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{
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transitframe *frame = static_cast< transitframe * >(user);
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frame->parent->frame.queue_tx(frame);
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}
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static bool
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sendto(llarp_link_session *s, llarp_buffer_t msg)
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{
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session *self = static_cast< session * >(s->impl);
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void *ptr = self->mem->alloc(self->mem, sizeof(transitframe), 64);
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transitframe *frame = new(ptr) transitframe(msg, self);
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llarp_thread_job job = {.user = frame, .work = &handle_sendto};
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llarp_logic_queue_job(self->logic, job);
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return true;
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}
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void
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pump()
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{
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llarp_buffer_t buf;
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while(frame.next_frame(buf))
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{
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encrypt_frame_async_send(buf.base, buf.sz);
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}
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}
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// this is called from net thread
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void
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recv(const void *buf, size_t sz)
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{
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switch(state)
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{
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case eIntroSent:
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// got intro ack
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on_intro_ack(buf, sz);
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return;
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case eEstablished:
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// session is started
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decrypt_frame(buf, sz);
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default:
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// invalid state?
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return;
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}
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}
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bool
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timedout(llarp_time_t now, llarp_time_t timeout = SESSION_TIMEOUT)
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{
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return now - frame.lastEvent >= timeout;
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}
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static bool
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is_timedout(llarp_link_session *s)
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{
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auto now = llarp_time_now_ms();
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return static_cast< session * >(s->impl)->timedout(now);
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}
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static void
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close(llarp_link_session *s)
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{
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// TODO: implement
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}
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static void
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handle_verify_introack(iwp_async_introack *introack)
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{
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session *link = static_cast< session * >(introack->user);
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if(introack->buf == nullptr)
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{
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// invalid signature
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printf("introack validation failed\n");
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return;
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}
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printf("introack validated\n");
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link->EnterState(eIntroAckRecv);
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// copy decrypted token
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memcpy(link->token, introack->token, 32);
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link->session_start();
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}
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static void
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handle_generated_session_start(iwp_async_session_start *start)
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{
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session *link = static_cast< session * >(start->user);
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llarp_ev_udp_sendto(link->udp, link->addr, start->buf, start->sz);
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link->EnterState(eEstablished);
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printf("session start sent\n");
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}
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void
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session_start()
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{
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size_t w2sz = rand() % 32;
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start.buf = workbuf;
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start.sz = w2sz + (32 * 3);
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start.nonce = workbuf + 32;
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crypto->randbytes(start.nonce, 32);
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start.token = token;
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memcpy(start.buf + 64, token, 32);
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if(w2sz)
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crypto->randbytes(start.buf + (32 * 3), w2sz);
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start.sessionkey = sessionkey;
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start.user = this;
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start.hook = &handle_generated_session_start;
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iwp_call_async_gen_session_start(iwp, &start);
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}
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static void
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handle_frame_decrypt(iwp_async_frame *frame)
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{
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session *self = static_cast< session * >(frame->user);
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if(frame->success)
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{
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self->frame.process(frame->buf + 64, frame->sz - 64);
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}
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else
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printf("decrypt frame fail\n");
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self->mem->free(self->mem, frame);
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}
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void
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decrypt_frame(const void *buf, size_t sz)
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{
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if(sz > 64)
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{
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printf("decrypt frame of size %ld\n", sz);
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auto frame = alloc_frame(buf, sz);
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frame->hook = &handle_frame_decrypt;
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iwp_call_async_frame_decrypt(iwp, frame);
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}
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else
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printf("short packet of size %ld\n", sz);
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}
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static void
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handle_frame_encrypt(iwp_async_frame *frame)
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{
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session *self = static_cast< session * >(frame->user);
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printf("sendto %ld\n", frame->sz);
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llarp_ev_udp_sendto(self->udp, self->addr, frame->buf, frame->sz);
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self->mem->free(self->mem, frame);
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}
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iwp_async_frame *
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alloc_frame(const void *buf, size_t sz)
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{
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iwp_async_frame *frame =
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(iwp_async_frame *)mem->alloc(mem, sizeof(iwp_async_frame), 2048);
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memcpy(frame->buf, buf, sz);
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frame->sz = sz;
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frame->user = this;
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frame->sessionkey = sessionkey;
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return frame;
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}
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void
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encrypt_frame_async_send(const void *buf, size_t sz)
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{
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printf("encrypt frame of size %ld\n", sz);
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auto frame = alloc_frame(buf, sz);
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frame->hook = &handle_frame_encrypt;
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iwp_call_async_frame_encrypt(iwp, frame);
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}
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void
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on_intro_ack(const void *buf, size_t sz)
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{
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printf("iwp intro ack\n");
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if(sz >= sizeof(workbuf))
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{
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// too big?
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printf("intro ack too big\n");
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// TOOD: session destroy ?
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return;
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}
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// copy buffer so we own it
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memcpy(workbuf, buf, sz);
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// set intro ack parameters
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introack.buf = workbuf;
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introack.sz = sz;
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introack.nonce = workbuf + 32;
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introack.remote_pubkey = remote;
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introack.secretkey = eph_seckey;
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introack.user = this;
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introack.hook = &handle_verify_introack;
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// async verify
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iwp_call_async_verify_introack(iwp, &introack);
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}
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static void
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handle_generated_intro(iwp_async_intro *i)
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{
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session *link = static_cast< session * >(i->user);
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if(i->buf)
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{
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|
printf("sending...\n");
|
|
llarp_ev_udp_sendto(link->udp, link->addr, i->buf, i->sz);
|
|
printf("sent introduce of size %ld\n", i->sz);
|
|
link->EnterState(eIntroSent);
|
|
}
|
|
}
|
|
|
|
void
|
|
introduce(uint8_t *pub)
|
|
{
|
|
memcpy(remote, pub, 32);
|
|
intro.buf = workbuf;
|
|
size_t w0sz = (rand() % 32);
|
|
intro.sz = (32 * 3) + w0sz;
|
|
// randomize w0
|
|
if(w0sz)
|
|
{
|
|
printf("random padding %ld bytes\n", w0sz);
|
|
crypto->randbytes(intro.buf + (32 * 3), w0sz);
|
|
}
|
|
|
|
intro.nonce = workbuf + 32;
|
|
intro.secretkey = eph_seckey;
|
|
intro.remote_pubkey = remote;
|
|
// randomize nonce
|
|
crypto->randbytes(intro.nonce, 32);
|
|
// async generate intro packet
|
|
intro.user = this;
|
|
intro.hook = &handle_generated_intro;
|
|
iwp_call_async_gen_intro(iwp, &intro);
|
|
}
|
|
|
|
void
|
|
EnterState(State st)
|
|
{
|
|
if(state == eInitial)
|
|
frame.alive();
|
|
state = st;
|
|
}
|
|
};
|
|
|
|
struct server
|
|
{
|
|
typedef std::mutex mtx_t;
|
|
typedef std::lock_guard< mtx_t > lock_t;
|
|
|
|
llarp_alloc *mem;
|
|
llarp_logic *logic;
|
|
llarp_crypto *crypto;
|
|
llarp_ev_loop *netloop;
|
|
llarp_msg_muxer *muxer;
|
|
llarp_async_iwp *iwp;
|
|
llarp_udp_io udp;
|
|
char keyfile[255];
|
|
uint32_t timeout_job_id;
|
|
|
|
typedef std::map< llarp::Addr, llarp_link_session > LinkMap_t;
|
|
|
|
LinkMap_t m_sessions;
|
|
mtx_t m_sessions_Mutex;
|
|
|
|
llarp_seckey_t seckey;
|
|
|
|
server(llarp_alloc *m, llarp_crypto *c, llarp_logic *l, llarp_threadpool *w)
|
|
{
|
|
mem = m;
|
|
crypto = c;
|
|
logic = l;
|
|
iwp = llarp_async_iwp_new(mem, crypto, logic, w);
|
|
}
|
|
|
|
session *
|
|
create_session(const llarp::Addr &src)
|
|
{
|
|
return new session(mem, muxer, &udp, iwp, crypto, logic, src);
|
|
}
|
|
|
|
bool
|
|
has_session_to(const llarp::Addr &dst)
|
|
{
|
|
lock_t lock(m_sessions_Mutex);
|
|
return m_sessions.find(dst) != m_sessions.end();
|
|
}
|
|
|
|
void
|
|
put_session(const llarp::Addr &src, session *impl)
|
|
{
|
|
llarp_link_session s = {};
|
|
src.CopyInto(s.addr);
|
|
s.impl = impl;
|
|
s.sendto = &session::sendto;
|
|
s.timeout = &session::is_timedout;
|
|
s.close = &session::close;
|
|
{
|
|
lock_t lock(m_sessions_Mutex);
|
|
m_sessions[src] = s;
|
|
}
|
|
}
|
|
|
|
session *
|
|
ensure_session(const llarp::Addr &src)
|
|
{
|
|
session *s = nullptr;
|
|
bool put = false;
|
|
// TODO: will this be a bottleneck since it's called in a hot path?
|
|
{
|
|
lock_t lock(m_sessions_Mutex);
|
|
auto itr = m_sessions.find(src);
|
|
if(itr == m_sessions.end())
|
|
{
|
|
// new inbound session
|
|
s = create_session(src);
|
|
put = true;
|
|
}
|
|
else
|
|
s = static_cast< session * >(itr->second.impl);
|
|
}
|
|
if(put)
|
|
put_session(src, s);
|
|
return s;
|
|
}
|
|
|
|
void
|
|
cleanup_dead()
|
|
{
|
|
auto now = llarp_time_now_ms();
|
|
std::set< llarp::Addr > remove;
|
|
printf("cleanup dead at %ld\n", now);
|
|
{
|
|
lock_t lock(m_sessions_Mutex);
|
|
for(auto &itr : m_sessions)
|
|
{
|
|
session *s = static_cast< session * >(itr.second.impl);
|
|
if(s->timedout(now))
|
|
remove.insert(itr.first);
|
|
}
|
|
|
|
for(const auto &addr : remove)
|
|
{
|
|
auto itr = m_sessions.find(addr);
|
|
if(itr != m_sessions.end())
|
|
{
|
|
session *s = static_cast< session * >(itr->second.impl);
|
|
m_sessions.erase(addr);
|
|
delete s;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
uint8_t *
|
|
pubkey()
|
|
{
|
|
return llarp_seckey_topublic(seckey);
|
|
}
|
|
|
|
bool
|
|
ensure_privkey()
|
|
{
|
|
std::error_code ec;
|
|
if(!fs::exists(keyfile, ec))
|
|
{
|
|
if(!keygen(keyfile))
|
|
return false;
|
|
}
|
|
std::ifstream f(keyfile);
|
|
if(f.is_open())
|
|
{
|
|
f.read((char *)seckey, sizeof(seckey));
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
keygen(const char *fname)
|
|
{
|
|
crypto->keygen(seckey);
|
|
std::ofstream f(fname);
|
|
if(f.is_open())
|
|
{
|
|
f.write((char *)seckey, sizeof(seckey));
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void
|
|
handle_cleanup_timer(void *l, uint64_t orig, uint64_t left)
|
|
{
|
|
server *link = static_cast< server * >(l);
|
|
link->timeout_job_id = 0;
|
|
if(!left)
|
|
{
|
|
link->cleanup_dead();
|
|
// TODO: exponential backoff for cleanup timer ?
|
|
link->issue_cleanup_timer(orig);
|
|
}
|
|
}
|
|
|
|
// this is called in net threadpool
|
|
static void
|
|
handle_recvfrom(struct llarp_udp_io *udp, const struct sockaddr *saddr,
|
|
const void *buf, ssize_t sz)
|
|
{
|
|
server *link = static_cast< server * >(udp->user);
|
|
llarp::Addr addr = *saddr;
|
|
session *s = link->ensure_session(addr);
|
|
s->recv(buf, sz);
|
|
}
|
|
|
|
void
|
|
cancel_timer()
|
|
{
|
|
if(timeout_job_id)
|
|
{
|
|
llarp_logic_cancel_call(logic, timeout_job_id);
|
|
}
|
|
timeout_job_id = 0;
|
|
}
|
|
|
|
void
|
|
issue_cleanup_timer(uint64_t timeout)
|
|
{
|
|
timeout_job_id = llarp_logic_call_later(
|
|
logic, {timeout, this, &server::handle_cleanup_timer});
|
|
}
|
|
};
|
|
|
|
server *
|
|
link_alloc(struct llarp_alloc *mem, struct llarp_msg_muxer *muxer,
|
|
const char *keyfile, struct llarp_crypto *crypto,
|
|
struct llarp_logic *logic, struct llarp_threadpool *worker)
|
|
{
|
|
server *link = new server(mem, crypto, logic, worker);
|
|
link->muxer = muxer;
|
|
strncpy(link->keyfile, keyfile, sizeof(link->keyfile));
|
|
return link;
|
|
}
|
|
|
|
const char *
|
|
link_name()
|
|
{
|
|
return "IWP";
|
|
}
|
|
|
|
void
|
|
link_get_addr(struct llarp_link *l, struct llarp_ai *addr)
|
|
{
|
|
server *link = static_cast< server * >(l->impl);
|
|
llarp::Addr linkaddr(link->udp.addr);
|
|
addr->rank = 1;
|
|
strncpy(addr->dialect, link_name(), sizeof(addr->dialect));
|
|
memcpy(addr->enc_key, link->pubkey(), 32);
|
|
memcpy(addr->ip.s6_addr, linkaddr.addr.s6_addr, 16);
|
|
addr->port = linkaddr.port;
|
|
}
|
|
|
|
bool
|
|
link_configure(struct llarp_link *l, struct llarp_ev_loop *netloop,
|
|
const char *ifname, int af, uint16_t port)
|
|
{
|
|
server *link = static_cast< server * >(l->impl);
|
|
|
|
if(!link->ensure_privkey())
|
|
{
|
|
printf("failed to ensure private key\n");
|
|
return false;
|
|
}
|
|
|
|
// bind
|
|
|
|
link->udp.addr.sa_family = af;
|
|
if(!llarp_getifaddr(ifname, af, &link->udp.addr))
|
|
return false;
|
|
switch(af)
|
|
{
|
|
case AF_INET:
|
|
((sockaddr_in *)&link->udp.addr)->sin_port = htons(port);
|
|
break;
|
|
case AF_INET6:
|
|
((sockaddr_in6 *)(&link->udp.addr))->sin6_port = htons(port);
|
|
break;
|
|
// TODO: AF_PACKET
|
|
default:
|
|
return false;
|
|
}
|
|
link->netloop = netloop;
|
|
link->udp.recvfrom = &server::handle_recvfrom;
|
|
link->udp.user = link;
|
|
return llarp_ev_add_udp(link->netloop, &link->udp) != -1;
|
|
}
|
|
|
|
bool
|
|
link_start(struct llarp_link *l, struct llarp_logic *logic)
|
|
{
|
|
server *link = static_cast< server * >(l->impl);
|
|
link->timeout_job_id = 0;
|
|
link->logic = logic;
|
|
// start cleanup timer
|
|
link->issue_cleanup_timer(1000);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
link_stop(struct llarp_link *l)
|
|
{
|
|
server *link = static_cast< server * >(l->impl);
|
|
link->cancel_timer();
|
|
return true;
|
|
}
|
|
|
|
void
|
|
link_iter_sessions(struct llarp_link *l, struct llarp_link_session_iter iter)
|
|
{
|
|
server *link = static_cast< server * >(l->impl);
|
|
iter.link = l;
|
|
// TODO: race condition with cleanup timer
|
|
for(auto &item : link->m_sessions)
|
|
if(!iter.visit(&iter, &item.second))
|
|
return;
|
|
}
|
|
|
|
bool
|
|
link_try_establish(struct llarp_link *l, struct llarp_link_establish_job *job)
|
|
{
|
|
server *link = static_cast< server * >(l->impl);
|
|
{
|
|
llarp::Addr dst = job->ai;
|
|
printf("try establish to %s\n", dst.to_string().c_str());
|
|
if(link->has_session_to(dst))
|
|
{
|
|
printf("already have session\n");
|
|
return false;
|
|
}
|
|
|
|
session *s = link->create_session(dst);
|
|
|
|
link->put_session(dst, s);
|
|
|
|
s->establish_job = job;
|
|
s->introduce(job->ai.enc_key);
|
|
}
|
|
printf("introduced\n");
|
|
return true;
|
|
}
|
|
|
|
void
|
|
link_mark_session_active(struct llarp_link *link,
|
|
struct llarp_link_session *s)
|
|
{
|
|
// TODO: implement
|
|
}
|
|
|
|
void
|
|
link_free(struct llarp_link *l)
|
|
{
|
|
server *link = static_cast< server * >(l->impl);
|
|
delete link;
|
|
}
|
|
}
|
|
|
|
extern "C" {
|
|
|
|
void
|
|
iwp_link_init(struct llarp_link *link, struct llarp_iwp_args args,
|
|
struct llarp_msg_muxer *muxer)
|
|
{
|
|
link->impl = iwp::link_alloc(args.mem, muxer, args.keyfile, args.crypto,
|
|
args.logic, args.cryptoworker);
|
|
link->name = iwp::link_name;
|
|
link->get_our_address = iwp::link_get_addr;
|
|
link->configure = iwp::link_configure;
|
|
link->start_link = iwp::link_start;
|
|
link->stop_link = iwp::link_stop;
|
|
link->iter_sessions = iwp::link_iter_sessions;
|
|
link->try_establish = iwp::link_try_establish;
|
|
link->mark_session_active = iwp::link_mark_session_active;
|
|
link->free_impl = iwp::link_free;
|
|
}
|
|
}
|