migrate usbmux.c.

6 files changed, 105 insertions, 102 deletions

diff --git a/include/libiphone/libiphone.h b/include/libiphone/libiphone.h
index 241c6fa..89b8529 100644
--- a/include/libiphone/libiphone.h
+++ b/include/libiphone/libiphone.h
@@ -32,18 +32,19 @@ extern "C" {
 //general errors
 #define IPHONE_E_SUCCESS          0
 #define IPHONE_E_INVALID_ARG     -1
-#define IPHONE_E_NO_DEVICE       -2
-#define IPHONE_E_TIMEOUT         -3
-#define IPHONE_E_NOT_ENOUGH_DATA -4
-#define IPHONE_E_BAD_HEADER      -5
+#define IPHONE_E_UNKNOWN_ERROR   -2
+#define IPHONE_E_NO_DEVICE       -3
+#define IPHONE_E_TIMEOUT         -4
+#define IPHONE_E_NOT_ENOUGH_DATA -5
+#define IPHONE_E_BAD_HEADER      -6
 
 //lockdownd specific error
-#define IPHONE_E_INVALID_CONF    -6
-#define IPHONE_E_PAIRING_FAILED  -7
-#define IPHONE_E_SSL_ERROR       -8
+#define IPHONE_E_INVALID_CONF    -7
+#define IPHONE_E_PAIRING_FAILED  -8
+#define IPHONE_E_SSL_ERROR       -9
 
 //afc specific error
-#define IPHONE_E_NO_SUCH_FILE    -9
+#define IPHONE_E_NO_SUCH_FILE    -10
 
 struct iphone_device_int;
 typedef struct iphone_device_int *iphone_device_t;
diff --git a/src/iphone.c b/src/iphone.c
index f3b7202..9027e35 100644
--- a/src/iphone.c
+++ b/src/iphone.c
@@ -42,7 +42,6 @@ int  iphone_get_device ( iphone_device_t *device  ){
         struct usb_bus *bus, *busses;
         struct usb_device *dev;
         iphone_device_t phone = (iphone_device_t)malloc(sizeof(struct iphone_device_int));
-        usbmux_version_header *version = version_header();
         
         // Initialize the struct
         phone->device = NULL;
@@ -126,7 +125,7 @@ int  iphone_get_device ( iphone_device_t *device  ){
         if (debug) fprintf(stderr, "get_iPhone(): Unknown error.\n");
         free_iPhone(phone);
         free(version);
-        return IPHONE_E_NO_DEVICE; // if it got to this point it's gotta be bad
+        return IPHONE_E_UNKNOWN_ERROR; // if it got to this point it's gotta be bad
 }
 
 /** Cleans up an iPhone structure, then frees the structure itself.  
diff --git a/src/lockdown.c b/src/lockdown.c
index bc70d53..e8626bc 100644
--- a/src/lockdown.c
+++ b/src/lockdown.c
@@ -77,8 +77,8 @@ char *lockdownd_generate_hostid() {
 iphone_lckd_client_t new_lockdownd_client(iphone_device_t phone) {
         if (!phone) return NULL;
         iphone_lckd_client_t control = (iphone_lckd_client_t)malloc(sizeof(struct iphone_lckd_client_int));
-        control->connection = mux_connect(phone, 0x0a00, 0xf27e);
-        if (!control->connection) {
+
+        if (IPHONE_E_SUCCESS != iphone_mux_new_client ( phone, 0x0a00, 0xf27e, &control->connection)) {
                 free(control);
                 return NULL;
         }
@@ -100,7 +100,7 @@ void iphone_lckd_free_client( iphone_lckd_client_t client ) {
                 mux_close_connection(client->connection);
         }
 
-        if (client->ssl_session) gnutls_deinit(*control->ssl_session);
+        if (client->ssl_session) gnutls_deinit(*client->ssl_session);
         free(client->ssl_session);
         free(client);
 }
diff --git a/src/lockdown.h b/src/lockdown.h
index 1c83ab3..f22d7db 100644
--- a/src/lockdown.h
+++ b/src/lockdown.h
@@ -33,7 +33,7 @@
 
 
 struct iphone_lckd_client_int {
-        usbmux_connection *connection;
+        iphone_umux_client_t connection;
         gnutls_session_t *ssl_session;
         int in_SSL;
         char *gtls_buffer_hack;
diff --git a/src/usbmux.c b/src/usbmux.c
index a4a859a..48cb963 100644
--- a/src/usbmux.c
+++ b/src/usbmux.c
@@ -29,8 +29,8 @@
 
 extern int debug;
 
-static usbmux_connection **connlist = NULL;
-static int connections = 0;
+static iphone_umux_client_t *connlist = NULL;
+static int clients = 0;
 
 /** Creates a USBMux packet for the given set of ports.
  * 
@@ -76,10 +76,10 @@ usbmux_version_header *version_header() {
  * 
  * @param connection The connection to delete from the tracking list.
  */
-void delete_connection(usbmux_connection *connection) {
-        usbmux_connection **newlist = (usbmux_connection**)malloc(sizeof(usbmux_connection*) * (connections - 1));
+void delete_connection(iphone_umux_client_t connection) {
+        iphone_umux_client_t *newlist = (iphone_umux_client_t*)malloc(sizeof(iphone_umux_client_t) * (clients - 1));
         int i = 0, j = 0;
-        for (i = 0; i < connections; i++) {
+        for (i = 0; i < clients; i++) {
                 if (connlist[i] == connection) continue;
                 else {
                         newlist[j] = connlist[i];
@@ -88,7 +88,7 @@ void delete_connection(usbmux_connection *connection) {
         }
         free(connlist);
         connlist = newlist;
-        connections--;
+        clients--;
         if (connection->recv_buffer) free(connection->recv_buffer);
         if (connection->header) free(connection->header);
         connection->r_len = 0;
@@ -101,59 +101,64 @@ void delete_connection(usbmux_connection *connection) {
  * @param connection The connection to add to the global list of connections.
  */
 
-void add_connection(usbmux_connection *connection) {
-        usbmux_connection **newlist = (usbmux_connection**)realloc(connlist, sizeof(usbmux_connection*) * (connections+1));
-        newlist[connections] = connection;
+void add_connection(iphone_umux_client_t connection) {
+        iphone_umux_client_t* newlist = (iphone_umux_client_t*)realloc(connlist, sizeof(iphone_umux_client_t) * (clients+1));
+        newlist[clients] = connection;
         connlist = newlist;
-        connections++;
+        clients++;
 }
 
 /** Initializes a connection on phone, with source port s_port and destination port d_port
  *
- * @param phone The iPhone to initialize a connection on.
- * @param s_port The source port
- * @param d_port The destination port -- 0xf27e for lockdownd. 
- *
- * @return A mux TCP header for the connection which is used for tracking and data transfer.
- */ 
-usbmux_connection *mux_connect(iphone_device_t phone, uint16 s_port, uint16 d_port) {
-        if (!phone || !s_port || !d_port) return NULL;
+ * @param device The iPhone to initialize a connection on.
+ * @param src_port The source port
+ * @param dst_port The destination port -- 0xf27e for lockdownd. 
+ * @param client A mux TCP header for the connection which is used for tracking and data transfer.
+ * @return IPHONE_E_SUCCESS on success, an error code otherwise.
+ */
+int iphone_mux_new_client ( iphone_device_t device, uint16_t src_port, uint16_t dst_port, iphone_umux_client_t *client ){
+        if (!device || !src_port || !dst_port)
+                return IPHONE_E_INVALID_ARG;
+
         int bytes = 0;
         // Initialize connection stuff
-        usbmux_connection *new_connection = (usbmux_connection*)malloc(sizeof(usbmux_connection));
-        new_connection->header = new_mux_packet(s_port, d_port);
+        iphone_umux_client_t new_connection = (iphone_umux_client_t)malloc(sizeof(struct iphone_umux_client_int));
+        new_connection->header = new_mux_packet(src_port, dst_port);
+
         // blargg
         if (new_connection && new_connection->header) {
                 new_connection->header->tcp_flags = 0x02;
                 new_connection->header->length = htonl(new_connection->header->length);
                 new_connection->header->length16 = htons(new_connection->header->length16);
                 
-                if (send_to_phone(phone, (char*)new_connection->header, sizeof(usbmux_tcp_header)) >= 0) {
+                if (send_to_phone(device, (char*)new_connection->header, sizeof(usbmux_tcp_header)) >= 0) {
                         usbmux_tcp_header *response;
                         response = (usbmux_tcp_header*)malloc(sizeof(usbmux_tcp_header));
-                        bytes = recv_from_phone(phone, (char*)response, sizeof(*response));
+                        bytes = recv_from_phone(device, (char*)response, sizeof(*response));
                         if (response->tcp_flags != 0x12) {
                                 free(response);
-                                return NULL;
+                                return IPHONE_E_UNKNOWN_ERROR;
                         } else {
                                 free(response);
+
                                 if (debug) printf("mux_connect: connection success\n");
                                 new_connection->header->tcp_flags = 0x10;
                                 new_connection->header->scnt = 1;
                                 new_connection->header->ocnt = 1;
-                                new_connection->phone = phone;
+                                new_connection->phone = device;
                                 new_connection->recv_buffer = NULL;
                                 new_connection->r_len = 0;
                                 add_connection(new_connection);
-                                return new_connection;
+                                *client = new_connection;
+                                return IPHONE_E_SUCCESS;
                         }
                 } else {
-                        return NULL;
+                        return IPHONE_E_NOT_ENOUGH_DATA;
                 }
         }
         
         // if we get to this point it's probably bad
-        return NULL;
+        return IPHONE_E_UNKNOWN_ERROR;
 }
 
 /** Cleans up the given USBMux connection.
@@ -161,56 +166,59 @@ usbmux_connection *mux_connect(iphone_device_t phone, uint16 s_port, uint16 d_po
  * 
  * @param connection The connection to close.
  */
-void mux_close_connection(usbmux_connection *connection) {
-        if (!connection || !connection->phone) return;
+void iphone_mux_free_client ( iphone_umux_client_t client ) {
+        if (!client || !client->phone) return;
         
-        connection->header->tcp_flags = 0x04;
-        connection->header->scnt = htonl(connection->header->scnt);
-        connection->header->ocnt = htonl(connection->header->ocnt);
+        client->header->tcp_flags = 0x04;
+        client->header->scnt = htonl(client->header->scnt);
+        client->header->ocnt = htonl(client->header->ocnt);
         int bytes = 0;
         
-        bytes = usb_bulk_write(connection->phone->device, BULKOUT, (char*)connection->header, sizeof(usbmux_tcp_header), 800);
+        bytes = usb_bulk_write(client->phone->device, BULKOUT, (char*)client->header, sizeof(usbmux_tcp_header), 800);
         if(debug && bytes < 0)
                 printf("mux_close_connection(): when writing, libusb gave me the error: %s\n", usb_strerror());
 
-        bytes = usb_bulk_read(connection->phone->device, BULKIN, (char*)connection->header, sizeof(usbmux_tcp_header), 800);
+        bytes = usb_bulk_read(client->phone->device, BULKIN, (char*)client->header, sizeof(usbmux_tcp_header), 800);
         if(debug && bytes < 0)
                 printf("get_iPhone(): when reading, libusb gave me the error: %s\n", usb_strerror());
         
-        delete_connection(connection);
+        delete_connection(client);
 }
 
+
 /** Sends the given data over the selected connection.
- * 
- * @param connection The connection we're sending data on.
+ *
+ * @param phone The iPhone to send to.
+ * @param client The client we're sending data on.
  * @param data A pointer to the data to send.
  * @param datalen How much data we're sending.
  *
  * @return The number of bytes sent, minus the header (28), or -1 on error.
  */
-int mux_send(usbmux_connection *connection, const char *data, uint32 datalen) {
-        if (!connection->phone || !connection || !data || datalen == 0) return -1;
-        // connection->scnt and connection->ocnt should already be in host notation...
+
+int iphone_mux_send ( iphone_umux_client_t client, const char *data, uint32_t datalen ) {
+        if (!client->phone || !client || !data || datalen == 0) return -1;
+        // client->scnt and client->ocnt should already be in host notation...
         // we don't need to change them juuuust yet. 
         int bytes = 0;
         if (debug) printf("mux_send(): client wants to send %i bytes\n", datalen);
         char *buffer = (char*)malloc(sizeof(usbmux_tcp_header) + datalen + 2); // allow 2 bytes of safety padding
         // Set the length and pre-emptively htonl/htons it
-        connection->header->length = htonl(sizeof(usbmux_tcp_header) + datalen);
-        connection->header->length16 = htons(sizeof(usbmux_tcp_header) + datalen);
+        client->header->length = htonl(sizeof(usbmux_tcp_header) + datalen);
+        client->header->length16 = htons(sizeof(usbmux_tcp_header) + datalen);
         
         // Put scnt and ocnt into big-endian notation
-        connection->header->scnt = htonl(connection->header->scnt);
-        connection->header->ocnt = htonl(connection->header->ocnt);
+        client->header->scnt = htonl(client->header->scnt);
+        client->header->ocnt = htonl(client->header->ocnt);
         // Concatenation of stuff in the buffer.
-        memcpy(buffer, connection->header, sizeof(usbmux_tcp_header));
+        memcpy(buffer, client->header, sizeof(usbmux_tcp_header));
         memcpy(buffer+sizeof(usbmux_tcp_header), data, datalen);
         
         // We have a buffer full of data, we should now send it to the phone.
         if (debug) printf("actually sending %zi bytes of data at %p\n", sizeof(usbmux_tcp_header)+datalen, buffer);
 
         
-        bytes = send_to_phone(connection->phone, buffer, sizeof(usbmux_tcp_header)+datalen);
+        bytes = send_to_phone(client->phone, buffer, sizeof(usbmux_tcp_header)+datalen);
         if (debug) printf("mux_send: sent %i bytes!\n", bytes);
         // Now that we've sent it off, we can clean up after our sloppy selves.
         if (debug) {
@@ -222,12 +230,12 @@ int mux_send(usbmux_connection *connection, const char *data, uint32 datalen) {
         
         if (buffer) free(buffer);
         // Re-calculate scnt and ocnt
-        connection->header->scnt = ntohl(connection->header->scnt) + datalen;
-        connection->header->ocnt = ntohl(connection->header->ocnt);
+        client->header->scnt = ntohl(client->header->scnt) + datalen;
+        client->header->ocnt = ntohl(client->header->ocnt);
         
         // Revert lengths
-        connection->header->length = ntohl(connection->header->length);
-        connection->header->length16 = ntohs(connection->header->length16);
+        client->header->length = ntohl(client->header->length);
+        client->header->length16 = ntohs(client->header->length16);
         
         // Now return the bytes.
         if (bytes < sizeof(usbmux_tcp_header)+datalen) {
@@ -247,52 +255,52 @@ int mux_send(usbmux_connection *connection, const char *data, uint32 datalen) {
  *
  * @return How many bytes were read, or -1 if something bad happens.
  */
-int mux_recv(usbmux_connection *connection, char *data, uint32 datalen) {
+int iphone_mux_recv ( iphone_umux_client_t client, char *data, uint32_t datalen ) {
         /*
          * Order of operation:
-         * 1.) Check if the connection has a pre-received buffer.
+         * 1.) Check if the client has a pre-received buffer.
          * 2.) If so, fill data with the buffer, as much as needed.
          *      a.) Return quickly if the buffer has enough
          *      b.) If the buffer is only part of the datalen, get the rest of datalen (and if we can't, just return)
          * 3.) If not, receive directly from the phone. 
          *      a.) Check incoming packet's ports. If proper, follow proper buffering and receiving operation.
-         *      b.) If not, find the connection the ports belong to and fill that connection's buffer, then return mux_recv with the same args to try again.
+         *      b.) If not, find the client the ports belong to and fill that client's buffer, then return mux_recv with the same args to try again.
          */
         if (debug) printf("mux_recv: datalen == %i\n", datalen);
         int bytes = 0, i = 0, complex = 0, offset = 0;
         char *buffer = NULL;
         usbmux_tcp_header *header = NULL;
                 
-        if (connection->recv_buffer) {
-                if (connection->r_len >= datalen) {
-                        memcpy(data, connection->recv_buffer, datalen);
-                        if (connection->r_len == datalen) {
+        if (client->recv_buffer) {
+                if (client->r_len >= datalen) {
+                        memcpy(data, client->recv_buffer, datalen);
+                        if (client->r_len == datalen) {
                                 // reset everything
-                                free(connection->recv_buffer);
-                                connection->r_len = 0;
-                                connection->recv_buffer = NULL;
+                                free(client->recv_buffer);
+                                client->r_len = 0;
+                                client->recv_buffer = NULL;
                         } else {
-                                buffer = (char*)malloc(sizeof(char) * (connection->r_len - datalen));
-                                memcpy(buffer, connection->recv_buffer+datalen, (connection->r_len - datalen));
-                                connection->r_len -= datalen;
-                                free(connection->recv_buffer);
-                                connection->recv_buffer = buffer;
+                                buffer = (char*)malloc(sizeof(char) * (client->r_len - datalen));
+                                memcpy(buffer, client->recv_buffer+datalen, (client->r_len - datalen));
+                                client->r_len -= datalen;
+                                free(client->recv_buffer);
+                                client->recv_buffer = buffer;
                         }
                         
                         // Since we were able to fill the data straight from our buffer, we can just return datalen. See 2a above.
                         return datalen;
                 } else {
-                        memcpy(data, connection->recv_buffer, connection->r_len);
-                        free(connection->recv_buffer); // don't need to deal with anymore, but...
-                        offset = connection->r_len; // see #2b, above
-                        connection->r_len = 0;
+                        memcpy(data, client->recv_buffer, client->r_len);
+                        free(client->recv_buffer); // don't need to deal with anymore, but...
+                        offset = client->r_len; // see #2b, above
+                        client->r_len = 0;
                 }
         } // End of what to do if we have a pre-buffer. See #1 and #2 above. 
         
         buffer = (char*)malloc(sizeof(char) * 131072); // make sure we get enough ;)
         
         // See #3.
-        bytes = recv_from_phone(connection->phone, buffer, 131072);
+        bytes = recv_from_phone(client->phone, buffer, 131072);
         if (bytes < 28) {
                 free(buffer);
                 if (debug) printf("mux_recv: Did not even get the header.\n");
@@ -300,10 +308,10 @@ int mux_recv(usbmux_connection *connection, char *data, uint32 datalen) {
         }
         
         header = (usbmux_tcp_header*)buffer;
-        if (header->sport != connection->header->dport || header->dport != connection->header->sport) {
+        if (header->sport != client->header->dport || header->dport != client->header->sport) {
                 // Ooooops -- we got someone else's packet.
                 // We gotta stick it in their buffer. (Take that any old way you want ;) )
-                for (i = 0; i < connections; i++) {
+                for (i = 0; i < clients; i++) {
                         if (connlist[i]->header->sport == header->dport && connlist[i]->header->dport == header->sport) {
                                 // we have a winner.
                                 char *nfb = (char*)malloc(sizeof(char) * (connlist[i]->r_len + (bytes - 28)));
@@ -312,7 +320,7 @@ int mux_recv(usbmux_connection *connection, char *data, uint32 datalen) {
                                         free(connlist[i]->recv_buffer);
                                 }
                                 connlist[i]->r_len += bytes - 28;
-                                //connlist[i]->recv_buffer = (char*)realloc(connlist[i]->recv_buffer, sizeof(char) * connection->r_len); // grow their buffer
+                                //connlist[i]->recv_buffer = (char*)realloc(connlist[i]->recv_buffer, sizeof(char) * client->r_len); // grow their buffer
                                 connlist[i]->recv_buffer = nfb;
                                 nfb = NULL; // A cookie for you if you can guess what "nfb" means. 
                                 complex = connlist[i]->r_len - (bytes - 28);
@@ -324,7 +332,7 @@ int mux_recv(usbmux_connection *connection, char *data, uint32 datalen) {
                 // Free our buffer and continue.
                 free(buffer);
                 buffer = NULL;
-                return mux_recv(connection, data, datalen); // recurse back in to try again
+                return mux_recv(client, data, datalen); // recurse back in to try again
         }
 
         // The packet was absolutely meant for us if it hits this point.
@@ -333,18 +341,18 @@ int mux_recv(usbmux_connection *connection, char *data, uint32 datalen) {
         if ((bytes-28) > datalen) {
                 // Copy what we need into the data, buffer the rest because we can.
                 memcpy(data+offset, buffer+28, datalen); // data+offset: see #2b, above
-                complex = connection->r_len + (bytes-28) - datalen;
-                connection->recv_buffer = (char*)realloc(connection->recv_buffer, (sizeof(char) * complex));
-                connection->r_len = complex;
-                complex = connection->r_len - (bytes-28) - datalen;
-                memcpy(connection->recv_buffer+complex, buffer+28+datalen, (bytes-28) - datalen);
+                complex = client->r_len + (bytes-28) - datalen;
+                client->recv_buffer = (char*)realloc(client->recv_buffer, (sizeof(char) * complex));
+                client->r_len = complex;
+                complex = client->r_len - (bytes-28) - datalen;
+                memcpy(client->recv_buffer+complex, buffer+28+datalen, (bytes-28) - datalen);
                 free(buffer);
-                connection->header->ocnt += bytes-28;
+                client->header->ocnt += bytes-28;
                 return datalen;
         } else {
                 // Fill the data with what we have, and just return.
                 memcpy(data+offset, buffer+28, bytes-28); // data+offset: see #2b, above
-                connection->header->ocnt += bytes-28;
+                client->header->ocnt += bytes-28;
                 free(buffer);
                 return (bytes-28);
         }
diff --git a/src/usbmux.h b/src/usbmux.h
index 831f0fd..da8a361 100644
--- a/src/usbmux.h
+++ b/src/usbmux.h
@@ -43,12 +43,12 @@ typedef struct {
         uint16 window, nullnull, length16;
 } usbmux_tcp_header;
 
-typedef struct {
+struct iphone_umux_client_int {
         usbmux_tcp_header *header;
         iphone_device_t phone;
         char *recv_buffer;
         int r_len;
-} usbmux_connection;
+};
 
 usbmux_tcp_header *new_mux_packet(uint16 s_port, uint16 d_port);
 
@@ -58,10 +58,5 @@ typedef struct {
 
 usbmux_version_header *version_header();
 
-usbmux_connection *mux_connect(iphone_device_t phone, uint16 s_port, uint16 d_port);
-void mux_close_connection(usbmux_connection *connection);
-int mux_send(usbmux_connection *connection, const char *data, uint32 datalen);
-int mux_recv(usbmux_connection *connection, char *data, uint32 datalen);
-
 
 #endif