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hello and ack exchange

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This commit is contained in:
DcruBro
2026-04-25 20:28:38 +02:00
parent 32b9a57366
commit bd972bfab6
6 changed files with 236 additions and 92 deletions
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70
src/nets/net_node.c
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@@ -218,15 +218,47 @@ void Node_Server_OnData(tcp_connection_t* client) {
printf("Received HELLO from node %u: protoVersion=%u, blockHeight=%" PRIu64 "\n",
client ? client->connectionId : 0U, protoVersion, blockHeight);
// Craft and send ACK_HELLO
uint8_t ackBuf[100];
uint8_t* ackData = ackBuf;
size_t ackOffset = 0;
memcpy(ackData + ackOffset, &protoVersion, sizeof(protoVersion));
ackOffset += sizeof(protoVersion);
memcpy(ackData + ackOffset, &currentBlockHeight, sizeof(currentBlockHeight));
ackOffset += sizeof(currentBlockHeight);
break;
}
case PACKET_TYPE_ACK_HELLO: {
// This is illegal
printf("Received unexpected ACK_HELLO packet from node %u\n", client ? client->connectionId : 0U);
// Send the error and kill the connection
const char* msg = "You can't ACK_HELLO me! I'm a server!";
Node_SendPacket(Node_FromConnection(client), client, PACKET_TYPE_ERROR, msg, strlen(msg));
TcpConnection_RequestClose(client);
return;
}
case PACKET_TYPE_FETCH_BLOCK:
case PACKET_TYPE_BLOCK_DATA:
case PACKET_TYPE_BROADCAST_BLOCK:
case PACKET_TYPE_ACK_BLOCK:
case PACKET_TYPE_BROADCAST_TX:
case PACKET_TYPE_ACK_TX:
case PACKET_TYPE_ERROR: {
// Decode the message inside as text
char* text = (char*)malloc(payloadLen + 1);
if (!text) {
return;
}
memcpy(text, payload, payloadLen);
text[payloadLen] = '\0';
printf("Received packet type %u from node %u with message: %s\n",
(unsigned int)packetType, client ? client->connectionId : 0U, text);
free(text);
break;
}
default:
return;
}
@@ -273,14 +305,50 @@ void Node_Client_OnData(tcp_connection_t* client) {
}
switch (packetType) {
case PACKET_TYPE_HELLO:
case PACKET_TYPE_HELLO: {
// This is illegal
printf("Received unexpected HELLO packet from node %u\n", client ? client->connectionId : 0U);
// Send the error and kill the connection
const char* msg = "You can't HELLO me! I'm a client!";
Node_SendPacket(Node_FromConnection(client), client, PACKET_TYPE_ERROR, msg, strlen(msg));
TcpConnection_RequestClose(client);
return;
}
case PACKET_TYPE_ACK_HELLO: {
// Decode ACK_HELLO
if (payloadLen < sizeof(uint32_t) + sizeof(uint64_t)) {
return;
}
uint32_t protoVersion;
uint64_t blockHeight;
memcpy(&protoVersion, payload, sizeof(protoVersion));
memcpy(&blockHeight, payload + sizeof(protoVersion), sizeof(blockHeight));
printf("Received ACK_HELLO from node %u with protoVersion %u and blockHeight %lu\n", client ? client->connectionId : 0U, protoVersion, (unsigned long)blockHeight);
break;
}
case PACKET_TYPE_FETCH_BLOCK:
case PACKET_TYPE_BLOCK_DATA:
case PACKET_TYPE_BROADCAST_BLOCK:
case PACKET_TYPE_ACK_BLOCK:
case PACKET_TYPE_BROADCAST_TX:
case PACKET_TYPE_ACK_TX:
case PACKET_TYPE_ERROR: {
// Decode the message inside as text
char* text = (char*)malloc(payloadLen + 1);
if (!text) {
return;
}
memcpy(text, payload, payloadLen);
text[payloadLen] = '\0';
printf("Received packet type %u from node %u with message: %s\n",
(unsigned int)packetType, client ? client->connectionId : 0U, text);
free(text);
break;
}
default:
return;
}