90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
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/**
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* The journal protocol attempts to keep a journal in sync with other (approved) nodes
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*/
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#include "ipfs/journal/journal.h"
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/***
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* See if we can handle this message
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* @param incoming the incoming message
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* @param incoming_size the size of the incoming message
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* @returns true(1) if the protocol in incoming is something we can handle. False(0) otherwise.
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*/
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int ipfs_journal_can_handle(const uint8_t* incoming, size_t incoming_size) {
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if (incoming_size < 8)
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return 0;
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char* result = strstr((char*)incoming, "/ipfs/journal/1.0.0");
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if(result == NULL || result != (char*)incoming)
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return 0;
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return 1;
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}
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/**
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* Clean up resources used by this handler
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* @param context the context to clean up
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* @returns true(1)
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*/
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int ipfs_journal_shutdown_handler(void* context) {
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return 1;
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}
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/***
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* Handles a message
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* @param incoming the message
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* @param incoming_size the size of the message
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* @param session_context details of the remote peer
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* @param protocol_context in this case, an IpfsNode
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* @returns 0 if the caller should not continue looping, <0 on error, >0 on success
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*/
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int ipfs_journal_handle_message(const uint8_t* incoming, size_t incoming_size, struct SessionContext* session_context, void* protocol_context) {
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//struct IpfsNode* local_node = (struct IpfsNode*)protocol_context;
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//TODO: handle the message
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return -1;
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}
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/***
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* Build the protocol handler struct for the Journal protocol
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* @param local_node what to stuff in the context
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* @returns the protocol handler
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*/
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struct Libp2pProtocolHandler* ipfs_journal_build_protocol_handler(const struct IpfsNode* local_node) {
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struct Libp2pProtocolHandler* handler = (struct Libp2pProtocolHandler*) malloc(sizeof(struct Libp2pProtocolHandler));
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if (handler != NULL) {
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handler->context = (void*)local_node;
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handler->CanHandle = ipfs_journal_can_handle;
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handler->HandleMessage = ipfs_journal_handle_message;
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handler->Shutdown = ipfs_journal_shutdown_handler;
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}
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return handler;
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}
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/***
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* Send a journal message to a remote peer
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* @param peer the peer to send it to
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* @returns true(1) on success, false(0) otherwise.
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*/
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int ipfs_journal_sync(struct Libp2pPeer* peer) {
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// make sure we're connected securely
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if (peer->is_local)
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return 0;
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if (peer->sessionContext->secure_stream == NULL)
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return 0;
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/*
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// grab the last 10 files
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struct Libp2pVector* vector = libp2p_utils_vector_new(1);
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if (vector == NULL) {
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return 0;
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}
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ipfs_journal_get_last(10, &vector);
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struct JournalMessage* message = NULL;
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// build the message
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if (!ipfs_journal_build_message(message))
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return 0;
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// protobuf the message
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// send the protocol header
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// send the message
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*/
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return 0;
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}
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