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Merge #8033: Fix Socks5() connect failures to be less noisy and less unnecessarily scary

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bf9266e Use Socks5ErrorString() to decode error responses from socks proxy. (Warren Togami)
94fd1d8 Make Socks5() InterruptibleRecv() timeout/failures informative. (Warren Togami)
0d9af79 SOCKS5 connecting and connected messages with -debug=net. (Warren Togami)
00678bd Make failures to connect via Socks5() more informative and less unnecessarily scary. (Warren Togami)
This commit is contained in:
Wladimir J. van der Laan 2016-05-19 08:45:27 +02:00 committed by Alexander Block
parent 0450dfdeb8
commit 1897ccc646
1 changed files with 22 additions and 15 deletions
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37
src/netbase.cpp
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@ -300,10 +300,25 @@ struct ProxyCredentials
std::string password; std::string password;
}; };
std::string Socks5ErrorString(int err)
{
switch(err) {
case 0x01: return "general failure";
case 0x02: return "connection not allowed";
case 0x03: return "network unreachable";
case 0x04: return "host unreachable";
case 0x05: return "connection refused";
case 0x06: return "TTL expired";
case 0x07: return "protocol error";
case 0x08: return "address type not supported";
default: return "unknown";
}
}
/** Connect using SOCKS5 (as described in RFC1928) */ /** Connect using SOCKS5 (as described in RFC1928) */
static bool Socks5(const std::string& strDest, int port, const ProxyCredentials *auth, SOCKET& hSocket) static bool Socks5(const std::string& strDest, int port, const ProxyCredentials *auth, SOCKET& hSocket)
{ {
LogPrintf("SOCKS5 connecting %s\n", strDest); LogPrint("net", "SOCKS5 connecting %s\n", strDest);
if (strDest.size() > 255) { if (strDest.size() > 255) {
CloseSocket(hSocket); CloseSocket(hSocket);
return error("Hostname too long"); return error("Hostname too long");
@ -327,7 +342,8 @@ static bool Socks5(const std::string& strDest, int port, const ProxyCredentials
char pchRet1[2]; char pchRet1[2];
if (!InterruptibleRecv(pchRet1, 2, SOCKS5_RECV_TIMEOUT, hSocket)) { if (!InterruptibleRecv(pchRet1, 2, SOCKS5_RECV_TIMEOUT, hSocket)) {
CloseSocket(hSocket); CloseSocket(hSocket);
return error("Error reading proxy response"); LogPrintf("Socks5() connect to %s:%d failed: InterruptibleRecv() timeout or other failure\n", strDest, port);
return false;
} }
if (pchRet1[0] != 0x05) { if (pchRet1[0] != 0x05) {
CloseSocket(hSocket); CloseSocket(hSocket);
@ -388,19 +404,10 @@ static bool Socks5(const std::string& strDest, int port, const ProxyCredentials
return error("Proxy failed to accept request"); return error("Proxy failed to accept request");
} }
if (pchRet2[1] != 0x00) { if (pchRet2[1] != 0x00) {
// Failures to connect to a peer that are not proxy errors
CloseSocket(hSocket); CloseSocket(hSocket);
switch (pchRet2[1]) LogPrintf("Socks5() connect to %s:%d failed: %s\n", strDest, port, Socks5ErrorString(pchRet2[1]));
{ return false;
case 0x01: return error("Proxy error: general failure");
case 0x02: return error("Proxy error: connection not allowed");
case 0x03: return error("Proxy error: network unreachable");
case 0x04: return error("Proxy error: host unreachable");
case 0x05: return error("Proxy error: connection refused");
case 0x06: return error("Proxy error: TTL expired");
case 0x07: return error("Proxy error: protocol error");
case 0x08: return error("Proxy error: address type not supported");
default: return error("Proxy error: unknown");
}
} }
if (pchRet2[2] != 0x00) { if (pchRet2[2] != 0x00) {
CloseSocket(hSocket); CloseSocket(hSocket);
@ -432,7 +439,7 @@ static bool Socks5(const std::string& strDest, int port, const ProxyCredentials
CloseSocket(hSocket); CloseSocket(hSocket);
return error("Error reading from proxy"); return error("Error reading from proxy");
} }
LogPrintf("SOCKS5 connected %s\n", strDest); LogPrint("net", "SOCKS5 connected %s\n", strDest);
return true; return true;
} }