[RFC] proposal for new library: libosmo-net

Hi, After some private discussion with Harald, I'd like to propose one new library to abstract the network interface that is used to communicate two elements that are part of one GSM network (no matter if it's on the A-bis interface, A interface, ...). This new library, whose proposed name can be "libosmo-net", would initially support: - E1 interfaces. - Ethernet + IPA TCP/IP. - rs232 (as required by bs11 its config interface). This support is included in libosmo-abis, so my idea is to extract this code from it and leave in libosmo-abis only the specific A-bis bits. The libosmo-net library would be extensible, so we can add new interfaces to it (new E1 cards supported, new protocols over BSD sockets, and so on). The interface provided to the client of the library will be homogeneous for all supported interfaces (at least, as much as we can). The new library will provide: * a constructor/destructor to create/release some network interface of * a given supported type. * a call-back for receiving incoming messages that will take the actual msgb. * one function for sending signalling messages. As well as many helper functions in this regard. Therefore, libosmo-abis will require this new libosmo-net library after all is done. For the A interface, I'd propose some hypothetical libosmo-a library that will contain the specific A interface protocols. Let me know what you think.