Send friend request with connection if for some reason (groupchats) we

are already connected to the friend but they have not added us yet.

toxcore/Messenger.c

@@ -1625,7 +1625,7 @@ Messenger *new_messenger(Messenger_Options *options)
     }
 
     m->options = *options;
-    friendreq_init(&(m->fr), m->onion_c);
+    friendreq_init(&(m->fr), m->fr_c);
     LANdiscovery_init(m->dht);
     set_nospam(&(m->fr), random_int());
     set_filter_function(&(m->fr), &friend_already_added, m);
@@ -2286,7 +2286,7 @@ void do_friends(Messenger *m)
 
     for (i = 0; i < m->numfriends; ++i) {
         if (m->friendlist[i].status == FRIEND_ADDED) {
-            int fr = send_friendrequest(m->onion_c, m->friendlist[i].client_id, m->friendlist[i].friendrequest_nospam,
+            int fr = send_friend_request_packet(m->fr_c, m->friendlist[i].friendcon_id, m->friendlist[i].friendrequest_nospam,
                                                 m->friendlist[i].info,
                                                 m->friendlist[i].info_size);
 

toxcore/friend_connection.c

@@ -253,6 +253,13 @@ static int handle_packet(void *object, int number, uint8_t *data, uint16_t lengt
     Friend_Connections *fr_c = object;
     Friend_Conn *friend_con = get_conn(fr_c, number);
 
+    if (data[0] == PACKET_ID_FRIEND_REQUESTS) {
+        if (fr_c->fr_request_callback)
+            fr_c->fr_request_callback(fr_c->fr_request_object, friend_con->real_public_key, data, length);
+
+        return 0;
+    }
+
     if (!friend_con)
         return -1;
 
@@ -538,6 +545,53 @@ int kill_friend_connection(Friend_Connections *fr_c, int friendcon_id)
 }
 
 
+/* Set friend request callback.
+ *
+ * This function will be called every time a friend request packet is received.
+ */
+void set_friend_request_callback(Friend_Connections *fr_c, int (*fr_request_callback)(void *, const uint8_t *,
+                                 const uint8_t *, uint32_t), void *object)
+{
+    fr_c->fr_request_callback = fr_request_callback;
+    fr_c->fr_request_object = object;
+    oniondata_registerhandler(fr_c->onion_c, CRYPTO_PACKET_FRIEND_REQ, fr_request_callback, object);
+}
+
+/* Send a Friend request packet.
+ *
+ *  return -1 if failure.
+ *  return  0 if it sent the friend request directly to the friend.
+ *  return the number of peers it was routed through if it did not send it directly.
+ */
+int send_friend_request_packet(Friend_Connections *fr_c, int friendcon_id, uint32_t nospam_num, const uint8_t *data,
+                               uint16_t length)
+{
+    if (1 + sizeof(nospam_num) + length > ONION_CLIENT_MAX_DATA_SIZE || length == 0)
+        return -1;
+
+    Friend_Conn *friend_con = get_conn(fr_c, friendcon_id);
+
+    if (!friend_con)
+        return -1;
+
+    uint8_t packet[1 + sizeof(nospam_num) + length];
+    memcpy(packet + 1, &nospam_num, sizeof(nospam_num));
+    memcpy(packet + 1 + sizeof(nospam_num), data, length);
+
+    if (friend_con->status == FRIENDCONN_STATUS_CONNECTED) {
+        packet[0] = PACKET_ID_FRIEND_REQUESTS;
+        return write_cryptpacket(fr_c->net_crypto, friend_con->crypt_connection_id, packet, sizeof(packet), 0) != -1;
+    } else {
+        packet[0] = CRYPTO_PACKET_FRIEND_REQ;
+        int num = send_onion_data(fr_c->onion_c, friend_con->onion_friendnum, packet, sizeof(packet));
+
+        if (num <= 0)
+            return -1;
+
+        return num;
+    }
+}
+
 /* Create new friend_connections instance. */
 Friend_Connections *new_friend_connections(Onion_Client *onion_c)
 {

toxcore/friend_connection.h

@@ -36,6 +36,7 @@
 #define GROUPCHAT_CALLBACK_INDEX 1
 
 #define PACKET_ID_ALIVE 16
+#define PACKET_ID_FRIEND_REQUESTS 18
 
 /* Interval between the sending of ping packets. */
 #define FRIEND_PING_INTERVAL 6
@@ -93,6 +94,8 @@ typedef struct {
     Friend_Conn *conns;
     uint32_t num_cons;
 
+    int (*fr_request_callback)(void *object, const uint8_t *source_pubkey, const uint8_t *data, uint32_t len);
+    void *fr_request_object;
 } Friend_Connections;
 
 /* return friendcon_id corresponding to the real public key on success.
@@ -157,6 +160,22 @@ int new_friend_connection(Friend_Connections *fr_c, const uint8_t *real_public_k
  */
 int kill_friend_connection(Friend_Connections *fr_c, int friendcon_id);
 
+/* Send a Friend request packet.
+ *
+ *  return -1 if failure.
+ *  return  0 if it sent the friend request directly to the friend.
+ *  return the number of peers it was routed through if it did not send it directly.
+ */
+int send_friend_request_packet(Friend_Connections *fr_c, int friendcon_id, uint32_t nospam_num, const uint8_t *data,
+                               uint16_t length);
+
+/* Set friend request callback.
+ *
+ * This function will be called every time a friend request is received.
+ */
+void set_friend_request_callback(Friend_Connections *fr_c, int (*fr_request_callback)(void *, const uint8_t *,
+                                 const uint8_t *, uint32_t), void *object);
+
 /* Create new friend_connections instance. */
 Friend_Connections *new_friend_connections(Onion_Client *onion_c);
 

toxcore/friend_requests.c

@@ -28,37 +28,6 @@
 #include "friend_requests.h"
 #include "util.h"
 
-/* Try to send a friend request to peer with public_key.
- * data is the data in the request and length is the length.
- *
- *  return -1 if failure.
- *  return  0 if it sent the friend request directly to the friend.
- *  return the number of peers it was routed through if it did not send it directly.
- */
-int send_friendrequest(const Onion_Client *onion_c, const uint8_t *public_key, uint32_t nospam_num, const uint8_t *data,
-                       uint32_t length)
-{
-    if (1 + sizeof(nospam_num) + length > ONION_CLIENT_MAX_DATA_SIZE || length == 0)
-        return -1;
-
-    uint8_t temp[1 + sizeof(nospam_num) + length];
-    temp[0] = CRYPTO_PACKET_FRIEND_REQ;
-    memcpy(temp + 1, &nospam_num, sizeof(nospam_num));
-    memcpy(temp + 1 + sizeof(nospam_num), data, length);
-
-    int friend_num = onion_friend_num(onion_c, public_key);
-
-    if (friend_num == -1)
-        return -1;
-
-    int num = send_onion_data(onion_c, friend_num, temp, sizeof(temp));
-
-    if (num <= 0)
-        return -1;
-
-    return num;
-}
-
 
 /* Set and get the nospam variable used to prevent one type of friend request spam. */
 void set_nospam(Friend_Requests *fr, uint32_t num)
@@ -169,7 +138,7 @@ static int friendreq_handlepacket(void *object, const uint8_t *source_pubkey, co
     return 0;
 }
 
-void friendreq_init(Friend_Requests *fr, Onion_Client *onion_c)
+void friendreq_init(Friend_Requests *fr, Friend_Connections *fr_c)
 {
-    oniondata_registerhandler(onion_c, CRYPTO_PACKET_FRIEND_REQ, &friendreq_handlepacket, fr);
+    set_friend_request_callback(fr_c, &friendreq_handlepacket, fr);
 }

toxcore/friend_requests.h

@@ -24,7 +24,7 @@
 #ifndef FRIEND_REQUESTS_H
 #define FRIEND_REQUESTS_H
 
-#include "onion_client.h"
+#include "friend_connection.h"
 
 #define MAX_FRIEND_REQUEST_DATA_SIZE (ONION_CLIENT_MAX_DATA_SIZE - (1 + sizeof(uint32_t)))
 
@@ -47,12 +47,6 @@ typedef struct {
     uint16_t received_requests_index;
 } Friend_Requests;
 
-/* Try to send a friendrequest to peer with public_key.
- * data is the data in the request and length is the length.
- * Maximum length of data is MAX_FRIEND_REQUEST_DATA_SIZE.
- */
-int send_friendrequest(const Onion_Client *onion_c, const uint8_t *public_key, uint32_t nospam_num, const uint8_t *data,
-                       uint32_t length);
 /* Set and get the nospam variable used to prevent one type of friend request spam. */
 void set_nospam(Friend_Requests *fr, uint32_t num);
 uint32_t get_nospam(const Friend_Requests *fr);
@@ -77,7 +71,7 @@ void callback_friendrequest(Friend_Requests *fr, void (*function)(void *, const
 void set_filter_function(Friend_Requests *fr, int (*function)(const uint8_t *, void *), void *userdata);
 
 /* Sets up friendreq packet handlers. */
-void friendreq_init(Friend_Requests *fr, Onion_Client *onion_c);
+void friendreq_init(Friend_Requests *fr, Friend_Connections *fr_c);
 
 
 #endif