Added ability to get files larger than a single USB packet size.

1 files changed, 22 insertions, 8 deletions

diff --git a/src/AFC.c b/src/AFC.c
index 7030a9e..052213f 100644
--- a/src/AFC.c
+++ b/src/AFC.c
@@ -21,6 +21,9 @@
 
 #include "AFC.h"
 
+// This is the maximum size an AFC data packet can be
+const int MAXIMUM_PACKET_SIZE = (2 << 15) - 32;
+
 extern int debug;
 
 AFClient *afc_connect(iPhone *phone, int s_port, int d_port) {
@@ -121,7 +124,8 @@ int dispatch_AFC_packet(AFClient *client, char *data, int length) {
 int receive_AFC_data(AFClient *client, char **dump_here) {
         AFCPacket *r_packet;
         char *buffer = (char*)malloc(sizeof(AFCPacket) * 4);
-        int bytes = 0, recv_len = 0;
+        char *final_buffer = NULL;
+        int bytes = 0, recv_len = 0, current_count=0;
         int retval = 0;
         
         bytes = mux_recv(client->phone, client->connection, buffer, sizeof(AFCPacket) * 4);
@@ -164,17 +168,27 @@ int receive_AFC_data(AFClient *client, char **dump_here) {
         recv_len = r_packet->entire_length - r_packet->this_length;
         free(r_packet);
         if (!recv_len) return bytes;
-        buffer = (char*)malloc(sizeof(char) * recv_len);
-        bytes = mux_recv(client->phone, client->connection, buffer, recv_len);
-        if (bytes <= 0) {
-                free(buffer);
+        
+        // Keep collecting packets until we have received the entire file.
+        buffer = (char*)malloc(sizeof(char) * (recv_len < MAXIMUM_PACKET_SIZE) ? recv_len : MAXIMUM_PACKET_SIZE);
+        final_buffer = (char*)malloc(sizeof(char) * recv_len);
+        while(current_count < recv_len){
+                bytes = mux_recv(client->phone, client->connection, buffer, recv_len);
+                if (bytes < 0) break;
+                memcpy(final_buffer+current_count, buffer, bytes);
+                current_count += bytes;
+        }
+        free(buffer);
+        
+        /*if (bytes <= 0) {
+                free(final_buffer);
                 printf("Didn't get it at the second pass.\n");
                 *dump_here = NULL;
                 return 0;
-        }
+        }*/
         
-        *dump_here = buffer; // what they do beyond this point = not my problem
-        return bytes;
+        *dump_here = final_buffer; // what they do beyond this point = not my problem
+        return current_count;
 }
 
 char **afc_get_dir_list(AFClient *client, char *dir) {