From a81b708eb57f53e5b051c5510cc2db03fdf16315 Mon Sep 17 00:00:00 2001
From: irungentoo <irungentoo@gmail.com>
Date: Sun, 13 Oct 2013 22:07:30 -0400
Subject: [PATCH] A/V integration in progress.

Added functions to send/receive msi packets via secure messenger
connections.

Made function to get the ip/port of a friend in Messenger.c public
---
 toxcore/Messenger.c | 38 ++++++++++++++++++++++++++++++++++----
 toxcore/Messenger.h | 27 ++++++++++++++++++++++++++-
 2 files changed, 60 insertions(+), 5 deletions(-)

diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index 7de14edf..44570742 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -682,7 +682,7 @@ int write_cryptpacket_id(Messenger *m, int friendnumber, uint8_t packet_id, uint
 /* returns valid ip port of connected friend on success
  * returns zeroed out IP_Port on failure
  */
-static IP_Port get_friend_ipport(Messenger *m, int friendnumber)
+IP_Port get_friend_ipport(Messenger *m, int friendnumber)
 {
     IP_Port zero;
     memset(&zero, 0, sizeof(zero));
@@ -1266,6 +1266,26 @@ static int handle_filecontrol(Messenger *m, int friendnumber, uint8_t send_recei
 
 /**************************************/
 
+/* Set the callback for msi packets.
+ *
+ *  Function(Messenger *m, int friendnumber, uint8_t *data, uint16_t length, void *userdata)
+ */
+void m_callback_msi_packet(Messenger *m, void (*function)(Messenger *m, int, uint8_t *, uint16_t, void *),
+                           void *userdata)
+{
+    m->msi_packet = function;
+    m->msi_packet_userdata = userdata;
+}
+
+/* Send an msi packet.
+ *
+ *  return 1 on success
+ *  return 0 on failure
+ */
+int m_msi_packet(Messenger *m, int friendnumber, uint8_t *data, uint16_t length)
+{
+    return write_cryptpacket_id(m, friendnumber, PACKET_ID_MSI, data, length);
+}
 
 /* Send a LAN discovery packet every LAN_DISCOVERY_INTERVAL seconds. */
 static void LANdiscovery(Messenger *m)
@@ -1419,11 +1439,12 @@ void doFriends(Messenger *m)
             }
 
             len = read_cryptpacket(m->net_crypto, m->friendlist[i].crypt_connection_id, temp);
-            uint8_t packet_id = temp[0];
-            uint8_t *data = temp + 1;
-            uint32_t data_length = len - 1;
 
             if (len > 0) {
+                uint8_t packet_id = temp[0];
+                uint8_t *data = temp + 1;
+                uint32_t data_length = len - 1;
+
                 switch (packet_id) {
                     case PACKET_ID_PING: {
                         m->friendlist[i].ping_lastrecv = temp_time;
@@ -1508,6 +1529,7 @@ void doFriends(Messenger *m)
                         if (m->friendlist[i].receives_read_receipts) {
                             write_cryptpacket_id(m, i, PACKET_ID_RECEIPT, message_id, message_id_length);
                         }
+
                         if (m->friend_action)
                             (*m->friend_action)(m, i, action, action_length, m->friend_action_userdata);
 
@@ -1611,6 +1633,14 @@ void doFriends(Messenger *m)
                         break;
                     }
 
+                    case PACKET_ID_MSI: {
+                        if (data_length == 0)
+                            break;
+
+                        if (m->msi_packet)
+                            (*m->msi_packet)(m, i, data, data_length, m->msi_packet_userdata);
+                    }
+
                     default: {
                         break;
                     }
diff --git a/toxcore/Messenger.h b/toxcore/Messenger.h
index 65fa19a5..f03a7478 100644
--- a/toxcore/Messenger.h
+++ b/toxcore/Messenger.h
@@ -44,6 +44,7 @@
 #define PACKET_ID_RECEIPT 65
 #define PACKET_ID_MESSAGE 64
 #define PACKET_ID_ACTION 63
+#define PACKET_ID_MSI 69
 #define PACKET_ID_FILE_SENDREQUEST 80
 #define PACKET_ID_FILE_CONTROL 81
 #define PACKET_ID_FILE_DATA 82
@@ -198,6 +199,9 @@ typedef struct Messenger {
     void (*file_filedata)(struct Messenger *m, int, uint8_t, uint8_t *, uint16_t length, void *);
     void *file_filedata_userdata;
 
+    void (*msi_packet)(struct Messenger *m, int, uint8_t *, uint16_t, void *);
+    void *msi_packet_userdata;
+
 } Messenger;
 
 /* Format: [client_id (32 bytes)][nospam number (4 bytes)][checksum (2 bytes)]
@@ -327,6 +331,11 @@ uint16_t getself_name(Messenger *m, uint8_t *name, uint16_t nlen);
  */
 int getname(Messenger *m, int friendnumber, uint8_t *name);
 
+/* returns valid ip port of connected friend on success
+ * returns zeroed out IP_Port on failure
+ */
+IP_Port get_friend_ipport(Messenger *m, int friendnumber);
+
 /* Set our user status.
  * You are responsible for freeing status after.
  *
@@ -547,7 +556,23 @@ int file_data(Messenger *m, int friendnumber, uint8_t filenumber, uint8_t *data,
  */
 uint64_t file_dataremaining(Messenger *m, int friendnumber, uint8_t filenumber, uint8_t send_receive);
 
-/*********************************/
+/*************** A/V related ******************/
+
+/* Set the callback for msi packets.
+ *
+ *  Function(Messenger *m, int friendnumber, uint8_t *data, uint16_t length, void *userdata)
+ */
+void m_callback_msi_packet(Messenger *m, void (*function)(Messenger *m, int, uint8_t *, uint16_t, void *),
+                           void *userdata);
+
+/* Send an msi packet.
+ *
+ *  return 1 on success
+ *  return 0 on failure
+ */
+int m_msi_packet(Messenger *m, int friendnumber, uint8_t *data, uint16_t length);
+
+/**********************************************/
 
 /* Run this at startup.
  *  return allocated instance of Messenger on success.