WireGuard does not provide any configuration messages, meaning that we cannot push the IP address we receive from the DHCP server to the client.
In order to overcome the limitation we don't perform any DHCP operations and instead just extract the source IP address from the first IPv4 packet we receive in the tunnel.
The gateway address and the subnet mask can be set using the new "SetStaticNetwork" command. The values can be retrieved using "OptionsGet".
In future we will add a "allowed source IP addresses" function, similar to what the original WireGuard implementation provides.
================================================================================
SetStaticNetwork command - Set Virtual Hub static IPv4 network parameters
Help for command "SetStaticNetwork"
Purpose:
Set Virtual Hub static IPv4 network parameters
Description:
Set the static IPv4 network parameters for the Virtual Hub. They are used when DHCP is not available (e.g. WireGuard sessions).
You can get the current settings by using the OptionsGet command.
Usage:
SetStaticNetwork [/GATEWAY:gateway] [/SUBNET:subnet]
Parameters:
/GATEWAY - Specify the IP address of the gateway that will be used for internet communication.
/SUBNET - Specify the subnet mask, required to determine the size of the local VPN network.
The WireGuard implementation will have two options that should not have a fixed default value, because they represent two keys (one is preshared, the other is private).
Instead of handling these two options differently in ProtoNewContainer(), this commit adds a new function to PROTO_IMPL: ProtoOptionString().
ProtoOptionString() takes the option's name as argument and returns a heap-allocated string that will be used as value. The function returns NULL when the option doesn't need a randomized value.
This new implementation can be easily compiled and executed without the need for other components to be present.
It relies on standard C functions, aside from stat() which is part of POSIX but available on Windows as well.
There's only one third-party dependency, which is tinydir: a single-file header-only library for traversing directories.
2575 // Address
at_least: At condition size < 1U, the value of size must be at least 1.
cannot_single: At condition size < 1U, the value of size cannot be equal to 0.
dead_error_condition: The condition size < 1U cannot be true.
2576 if (size < 1)
2577 {
CID 287533 (#1 of 1): Logically dead code (DEADCODE)dead_error_line: Execution cannot reach this statement: goto LABEL_ERROR;.
2578 goto LABEL_ERROR;
2579 }
CID 355460 (#1 of 1): Dereference before null check (REVERSE_INULL)check_after_deref: Null-checking p suggests that it may be null, but it has already been dereferenced on all paths leading to the check.
737 if (p == NULL)
738 {
739 return false;
740 }
CID 287561 (#1 of 1): Array compared against 0 (NO_EFFECT)array_null: Comparing an array to null is not useful: src == NULL, since the test will always evaluate as true.
Was src formerly declared as a pointer?
3748 if (cedar == NULL || src == NULL || dst == NULL)
3749 {
3750 return false;
3751 }
(gdb) bt
0 0x00007f43857a5e14 in __GI___pthread_mutex_init (mutex=0x0, mutexattr=0x0) at pthread_mutex_init.c:89
1 0x00007f4385eaaf1b in UnixNewLock () at SoftEtherVPN/src/Mayaqua/Unix.c:1845
2 0x00007f4385e92331 in NewLockMain () at SoftEtherVPN/src/Mayaqua/Object.c:89
3 0x00007f4385e92359 in NewLock () at SoftEtherVPN/src/Mayaqua/Object.c:101
4 0x00007f4385e92765 in NewCounter () at SoftEtherVPN/src/Mayaqua/Object.c:171
5 0x00007f4385e92e76 in NewRef () at SoftEtherVPN/src/Mayaqua/Object.c:339
6 0x00007f4385e76939 in NewSkEx (no_compact=0) at SoftEtherVPN/src/Mayaqua/Memory.c:863
7 0x00007f4385e68c95 in NormalizePathW (
dst=0x7ffe65932940 L"\xd6ff2ffb\xfbf14ce5\xad8669ca\x41998a9c\x5107d62d\x8d2ab3f2\x37ceaad2\xffc947ec\xad8ed8d8\x33e9f2f7\xc05723a9\x843263e3\x5516beb3\x12571e2a\xd81405f3\xf92194fe\xd807aa98\x12835b01\x243185be\x550c7dc3\xfd74170d\x12835b01\x553185be\x550c7dc3\x72be5d74\x80deb1fe\x9bdc06a7\xc19bf1f4\x72be5d74\x80deb1fe\x9bdc06a7\xc19bf174\x894d4018\xc54302b8\x145dc92\x143b3917\x62aa4fb8\x915764b1\xd5e11bef\x9d5fbc5\xb956c25b\x59f111f1\x923f82a4\xab1c5ed5\x3956c25b\x59f111f1\x923f82a4\xab1c5ed5\xbaeb40", size=2048, src=<optimized out>)
at SoftEtherVPN/src/Mayaqua/FileIO.c:1960
8 0x00007f4385e69188 in ConbinePathW (
dst=0x7ffe65932940 L"\xd6ff2ffb\xfbf14ce5\xad8669ca\x41998a9c\x5107d62d\x8d2ab3f2\x37ceaad2\xffc947ec\xad8ed8d8\x33e9f2f7\xc05723a9\x843263e3\x5516beb3\x12571e2a\xd81405f3\xf92194fe\xd807aa98\x12835b01\x243185be\x550c7dc3\xfd74170d\x12835b01\x553185be\x550c7dc3\x72be5d74\x80deb1fe\x9bdc06a7\xc19bf1f4\x72be5d74\x80deb1fe\x9bdc06a7\xc19bf174\x894d4018\xc54302b8\x145dc92\x143b3917\x62aa4fb8\x915764b1\xd5e11bef\x9d5fbc5\xb956c25b\x59f111f1\x923f82a4\xab1c5ed5\x3956c25b\x59f111f1\x923f82a4\xab1c5ed5\xbaeb40", size=2048,
dirname=0xbace10 L"/root/.local/bin", filename=0x7ffe65932100 L"SoftEtherVPN/build/vpntest") at SoftEtherVPN/src/Mayaqua/FileIO.c:1686
9 0x00007f4385e6af48 in UnixGetExeNameW (name=0x7f4385ede820 <exe_file_name_w> L"/tmp/a.out", size=2048, arg=0xbb5050 L"./vpntest") at SoftEtherVPN/src/Mayaqua/FileIO.c:1401
10 0x00007f4385e6b04b in InitGetExeName (arg=<optimized out>) at SoftEtherVPN/src/Mayaqua/FileIO.c:1367
11 0x00007f4385e7470a in InitMayaqua (memcheck=memcheck@entry=0, debug=debug@entry=1, argc=argc@entry=3, argv=argv@entry=0x7ffe659340e8)
at SoftEtherVPN/src/Mayaqua/Mayaqua.c:456
12 0x0000000000401282 in main (argc=3, argv=0x7ffe659340e8) at SoftEtherVPN/src/vpntest/vpntest.c:259
