net: extend CNetAddr::SetSpecial() to support I2P

Recognize also I2P addresses in the form `base32hashofpublickey.b32.i2p`
from `CNetAddr::SetSpecial()`.

This makes `Lookup()` support them, which in turn makes it possible to
manually connect to an I2P node by using
`-proxy=i2p_socks5_proxy:port -addnode=i2p_address.b32.i2p:port`

Co-authored-by: Lucas Ontivero <lucasontivero@gmail.com>

1 files changed, 29 insertions, 1 deletions

diff --git a/src/netaddress.h b/src/netaddress.h
index d0986557f7..897ce46cda 100644
--- a/src/netaddress.h
+++ b/src/netaddress.h
@@ -151,7 +151,16 @@ class CNetAddr
 
         bool SetInternal(const std::string& name);
 
-        bool SetSpecial(const std::string &strName); // for Tor addresses
+        /**
+         * Parse a Tor or I2P address and set this object to it.
+         * @param[in] addr Address to parse, for example
+         * pg6mmjiyjmcrsslvykfwnntlaru7p5svn6y2ymmju6nubxndf4pscryd.onion or
+         * ukeu3k5oycgaauneqgtnvselmt4yemvoilkln7jpvamvfx7dnkdq.b32.i2p.
+         * @returns Whether the operation was successful.
+         * @see CNetAddr::IsTor(), CNetAddr::IsI2P()
+         */
+        bool SetSpecial(const std::string& addr);
+
         bool IsBindAny() const; // INADDR_ANY equivalent
         bool IsIPv4() const;    // IPv4 mapped address (::FFFF:0:0/96, 0.0.0.0/0)
         bool IsIPv6() const;    // IPv6 address (not mapped IPv4, not Tor)
@@ -249,6 +258,25 @@ class CNetAddr
 
     private:
         /**
+         * Parse a Tor address and set this object to it.
+         * @param[in] addr Address to parse, must be a valid C string, for example
+         * pg6mmjiyjmcrsslvykfwnntlaru7p5svn6y2ymmju6nubxndf4pscryd.onion or
+         * 6hzph5hv6337r6p2.onion.
+         * @returns Whether the operation was successful.
+         * @see CNetAddr::IsTor()
+         */
+        bool SetTor(const std::string& addr);
+
+        /**
+         * Parse an I2P address and set this object to it.
+         * @param[in] addr Address to parse, must be a valid C string, for example
+         * ukeu3k5oycgaauneqgtnvselmt4yemvoilkln7jpvamvfx7dnkdq.b32.i2p.
+         * @returns Whether the operation was successful.
+         * @see CNetAddr::IsI2P()
+         */
+        bool SetI2P(const std::string& addr);
+
+        /**
          * BIP155 network ids recognized by this software.
          */
         enum BIP155Network : uint8_t {