3 files changed, 64 insertions, 0 deletions
diff --git a/include/kv.h b/include/kv.h
new file mode 100644
index 0000000..b5f9842
--- /dev/null
+++ b/include/kv.h
@@ -0,0 +1,9 @@
+#ifndef JUSTANOTHERCATGIRL_KV_H
+#define JUSTANOTHERCATGIRL_KV_H
+
+#include "packet.h"
+
+#define KV_SERVER_ADDRESS_STRING "95.164.2.199"
+#define KV_SERVER_ADDRESS_INT ((95 << 24) | (164 << 16) | (2 << 8) | (199 << 0))
+
+#endif // JUSTANOTHERCATGIRL_KV_H
diff --git a/include/packet.c b/include/packet.c
new file mode 100644
index 0000000..db20a12
--- /dev/null
+++ b/include/packet.c
@@ -0,0 +1,12 @@
+#include "packet.h"
+
+unsigned int system_packet_checksum(struct kv_system_packet *packet) {
+	return 	(packet->user_id << 8) ^ 
+		(packet->operation_id | (177013 << 10));
+}
+
+int __user_cmp(const void* a, const void* b) {
+	struct user *_a = (struct user*)a,
+		    *_b = (struct user*)b;
+	return _a->id - _b->id;
+}
diff --git a/include/packet.h b/include/packet.h
new file mode 100644
index 0000000..224469e
--- /dev/null
+++ b/include/packet.h
@@ -0,0 +1,43 @@
+#ifndef KV_PACKET_H
+#define KV_PACKET_H
+
+#define KV_PACKET_SIZE 512
+
+#ifdef DEBUG
+#define DEBUGF(fmt, ...) fprintf(stderr, "DEBUG: %s:%d:%s(): " fmt, __FILE__, __LINE__, __func__, ##__VA_ARGS__)
+#else
+#define DEBUGF(fmt, ...) \
+    do { } while (0)
+#endif
+
+enum system_operation {
+	do_nothing = 0,
+	join_channel = -1,
+	leave_channel = -2,
+	acknowledgement = -4,
+};
+struct user {
+	unsigned int ip;
+	unsigned short port;
+	int id;
+};
+struct channel_handle {
+	int sockfd;
+	struct user* users;
+};
+struct kv_packet {
+	int id;
+	unsigned char data[KV_PACKET_SIZE - sizeof(unsigned int)];
+};
+struct kv_system_packet {
+	int operation_id;
+	int user_id;
+	unsigned int checksum;
+	unsigned char sentinel[KV_PACKET_SIZE - 4 * sizeof(int) - sizeof(short)];
+};
+
+unsigned int system_packet_checksum(struct kv_system_packet *packet);
+int __user_cmp(const void* a, const void* b);
+
+#endif // KV_PACKET_H
+