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junixsocket is a Java/JNI library providing Unix domain socket (AF_UNIX) support and other advanced socket families (AF_TIPC, AF_VSOCK, AF_SYSTEM) to Java applications. It extends standard Java Socket and NIO APIs with features like ancillary data (file descriptor passing), peer credentials, abstract namespace, SSL/TLS, RMI, and shared memory. The architecture is modular with core modules (junixsocket-common, junixsocket-native) and protocol-specific extensions. Key entry points include factory methods in AFUNIXSocket/AFUNIXServerSocket, SSLContextBuilder, and AFUNIXNaming. Data flows involve JNI-mediated socket operations for IPC, with advanced features using native ancillary messaging. External dependencies include optional integrations (MySQL Connector/J, Jetty, Netty) and platform-specific toolchains for native builds.