uint32_t type fixes for afc_file_read/afc_file_write

This patch also adapts all corresponding internal functions.
The buffer lengths are now consistently handled as uint32_t.

1 files changed, 122 insertions, 108 deletions

diff --git a/src/AFC.c b/src/AFC.c
index 2b83c44..15d746e 100644
--- a/src/AFC.c
+++ b/src/AFC.c
@@ -119,21 +119,24 @@ afc_error_t afc_client_free(afc_client_t client)
  * @param client The client to send data through.
  * @param data The data to send.
  * @param length The length to send.
- * 
- * @return The number of bytes actually sent, or -1 on error. 
+ * @param bytes_sent The number of bytes actually sent.
+ *
+ * @return AFC_E_SUCCESS on success, or an AFC_E_* error value on error.
  * 
  * @warning set client->afc_packet->this_length and
  *          client->afc_packet->entire_length to 0 before calling this.  The
  *          reason is that if you set them to different values, it indicates
  *          you want to send the data as two packets.
  */
-static int afc_dispatch_packet(afc_client_t client, const char *data, uint64_t length)
+static afc_error_t afc_dispatch_packet(afc_client_t client, const char *data, uint32_t length, uint32_t *bytes_sent)
 {
-        int bytes = 0, offset = 0;
+        uint32_t offset = 0;
         uint32_t sent = 0;
 
         if (!client || !client->connection || !client->afc_packet)
-                return 0;
+                return AFC_E_INVALID_ARGUMENT;
+
+        *bytes_sent = 0;
 
         if (!data || !length)
                 length = 0;
@@ -158,21 +161,26 @@ static int afc_dispatch_packet(afc_client_t client, const char *data, uint64_t l
                         log_debug_msg("to based on the packet.\n");
                         log_debug_msg("%s: length minus offset: %i\n", __func__, length - offset);
                         log_debug_msg("%s: rest of packet: %i\n", __func__, client->afc_packet->entire_length - client->afc_packet->this_length);
-                        return -1;
+                        return AFC_E_INTERNAL_ERROR;
                 }
 
+                /* send AFC packet header */
                 AFCPacket_to_LE(client->afc_packet);
+                sent = 0;
                 iphone_device_send(client->connection, (void*)client->afc_packet, sizeof(AFCPacket), &sent);
                 if (sent == 0) {
-                        return bytes;
+                        /* FIXME: should this be handled as success?! */
+                        return AFC_E_SUCCESS;
                 }
-                bytes += sent;
+                *bytes_sent += sent;
 
+                /* send AFC packet data */
+                sent = 0;
                 iphone_device_send(client->connection, data, offset, &sent);
                 if (sent == 0) {
-                        return bytes;
+                        return AFC_E_SUCCESS;
                 }
-                bytes += sent;
+                *bytes_sent += sent;
 
                 log_debug_msg("%s: sent the first now go with the second\n", __func__);
                 log_debug_msg("%s: Length: %i\n", __func__, length - offset);
@@ -182,8 +190,8 @@ static int afc_dispatch_packet(afc_client_t client, const char *data, uint64_t l
                 sent = 0;
                 iphone_device_send(client->connection, data + offset, length - offset, &sent);
 
-                bytes = sent;
-                return bytes;
+                *bytes_sent = sent;
+                return AFC_E_SUCCESS;
         } else {
                 log_debug_msg("%s: doin things the old way\n", __func__);
                 log_debug_msg("%s: packet length = %i\n", __func__, client->afc_packet->this_length);
@@ -191,36 +199,38 @@ static int afc_dispatch_packet(afc_client_t client, const char *data, uint64_t l
                 log_debug_buffer((char*)client->afc_packet, sizeof(AFCPacket));
                 log_debug_msg("\n");
 
+                /* send AFC packet header */
                 AFCPacket_to_LE(client->afc_packet);
+                sent = 0;
                 iphone_device_send(client->connection, (void*)client->afc_packet, sizeof(AFCPacket), &sent);
                 if (sent == 0) {
-                        return bytes;
+                        return AFC_E_SUCCESS;
                 }
-                bytes += sent;
+                *bytes_sent += sent;
+                /* send AFC packet data (if there's data to send) */
                 if (length > 0) {
                         log_debug_msg("%s: packet data follows\n", __func__);   
 
                         log_debug_buffer(data, length);
                         log_debug_msg("\n");
                         iphone_device_send(client->connection, data, length, &sent);
-                        bytes += sent;
+                        *bytes_sent += sent;
                 }
-                return bytes;
+                return AFC_E_SUCCESS;
         }
-        return -1;
+        return AFC_E_INTERNAL_ERROR;
 }
 
 /** Receives data through an AFC client and sets a variable to the received data.
  * 
  * @param client The client to receive data on.
  * @param dump_here The char* to point to the newly-received data.
+ * @param bytes_recv How much data was received.
  * 
- * @return How much data was received, 0 on successful receive with no errors,
- *         -1 if there was an error involved with receiving or if the packet
- *         received raised a non-trivial error condition (i.e. non-zero with
- *         AFC_ERROR operation)
+ * @return AFC_E_SUCCESS when data has been received, or an AFC_E_* error value
+ *         when an error occured.
  */
-static afc_error_t afc_receive_data(afc_client_t client, char **dump_here, int *bytes)
+static afc_error_t afc_receive_data(afc_client_t client, char **dump_here, uint32_t *bytes_recv)
 {
         AFCPacket header;
         uint32_t entire_len = 0;
@@ -228,16 +238,16 @@ static afc_error_t afc_receive_data(afc_client_t client, char **dump_here, int *
         uint32_t current_count = 0;
         uint64_t param1 = -1;
 
-        *bytes = 0;
+        *bytes_recv = 0;
 
         /* first, read the AFC header */
-        iphone_device_recv(client->connection, (char*)&header, sizeof(AFCPacket), (uint32_t*)bytes);
+        iphone_device_recv(client->connection, (char*)&header, sizeof(AFCPacket), bytes_recv);
         AFCPacket_from_LE(&header);
-        if (*bytes <= 0) {
+        if (*bytes_recv == 0) {
                 log_debug_msg("%s: Just didn't get enough.\n", __func__);
                 *dump_here = NULL;
                 return AFC_E_MUX_ERROR;
-        } else if ((uint32_t)*bytes < sizeof(AFCPacket)) {
+        } else if (*bytes_recv < sizeof(AFCPacket)) {
                 log_debug_msg("%s: Did not even get the AFCPacket header\n", __func__);
                 *dump_here = NULL;
                 return AFC_E_MUX_ERROR;
@@ -265,7 +275,7 @@ static afc_error_t afc_receive_data(afc_client_t client, char **dump_here, int *
                         && header.entire_length == sizeof(AFCPacket)) {
                 log_debug_msg("%s: Empty AFCPacket received!\n", __func__);
                 *dump_here = NULL;
-                *bytes = 0;
+                *bytes_recv = 0;
                 if (header.operation == AFC_OP_DATA) {
                         return AFC_E_SUCCESS;
                 } else {
@@ -285,13 +295,13 @@ static afc_error_t afc_receive_data(afc_client_t client, char **dump_here, int *
 
         *dump_here = (char*)malloc(entire_len);
         if (this_len > 0) {
-                iphone_device_recv(client->connection, *dump_here, this_len, (uint32_t*)bytes);
-                if (*bytes <= 0) {
+                iphone_device_recv(client->connection, *dump_here, this_len, bytes_recv);
+                if (*bytes_recv <= 0) {
                         free(*dump_here);
                         *dump_here = NULL;
                         log_debug_msg("%s: Did not get packet contents!\n", __func__);
                         return AFC_E_NOT_ENOUGH_DATA;
-                } else if ((uint32_t)*bytes < this_len) {
+                } else if (*bytes_recv < this_len) {
                         free(*dump_here);
                         *dump_here = NULL;
                         log_debug_msg("%s: Could not receive this_len=%d bytes\n", __func__, this_len);
@@ -303,12 +313,12 @@ static afc_error_t afc_receive_data(afc_client_t client, char **dump_here, int *
 
         if (entire_len > this_len) {
                 while (current_count < entire_len) {
-                        iphone_device_recv(client->connection, (*dump_here)+current_count, entire_len - current_count, (uint32_t*)bytes);
-                        if (*bytes <= 0) {
-                                log_debug_msg("%s: Error receiving data (recv returned %d)\n", __func__, *bytes);
+                        iphone_device_recv(client->connection, (*dump_here)+current_count, entire_len - current_count, bytes_recv);
+                        if (*bytes_recv <= 0) {
+                                log_debug_msg("%s: Error receiving data (recv returned %d)\n", __func__, *bytes_recv);
                                 break;
                         }
-                        current_count += *bytes;
+                        current_count += *bytes_recv;
                 }
                 if (current_count < entire_len) {
                         log_debug_msg("%s: WARNING: could not receive full packet (read %s, size %d)\n", __func__, current_count, entire_len);
@@ -348,7 +358,7 @@ static afc_error_t afc_receive_data(afc_client_t client, char **dump_here, int *
                 /* unknown operation code received */
                 free(*dump_here);
                 *dump_here = NULL;
-                *bytes = 0;
+                *bytes_recv = 0;
 
                 log_debug_msg("%s: WARNING: Unknown operation code received 0x%llx param1=%lld\n", __func__, header.operation, param1);
                 fprintf(stderr, "%s: WARNING: Unknown operation code received 0x%llx param1=%lld\n", __func__, (long long)header.operation, (long long)param1);
@@ -356,13 +366,13 @@ static afc_error_t afc_receive_data(afc_client_t client, char **dump_here, int *
                 return AFC_E_OP_NOT_SUPPORTED;
         }
 
-        *bytes = current_count;
+        *bytes_recv = current_count;
         return AFC_E_SUCCESS;
 }
 
-static int count_nullspaces(char *string, int number)
+static uint32_t count_nullspaces(char *string, uint32_t number)
 {
-        int i = 0, nulls = 0;
+        uint32_t i = 0, nulls = 0;
 
         for (i = 0; i < number; i++) {
                 if (string[i] == '\0')
@@ -372,9 +382,9 @@ static int count_nullspaces(char *string, int number)
         return nulls;
 }
 
-static char **make_strings_list(char *tokens, int true_length)
+static char **make_strings_list(char *tokens, uint32_t true_length)
 {
-        int nulls = 0, i = 0, j = 0;
+        uint32_t nulls = 0, i = 0, j = 0;
         char **list = NULL;
 
         if (!tokens || !true_length)
@@ -401,7 +411,7 @@ static char **make_strings_list(char *tokens, int true_length)
  */
 afc_error_t afc_read_directory(afc_client_t client, const char *dir, char ***list)
 {
-        int bytes = 0;
+        uint32_t bytes = 0;
         char *data = NULL, **list_loc = NULL;
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
@@ -414,8 +424,8 @@ afc_error_t afc_read_directory(afc_client_t client, const char *dir, char ***lis
         client->afc_packet->operation = AFC_OP_READ_DIR;
         client->afc_packet->entire_length = 0;
         client->afc_packet->this_length = 0;
-        bytes = afc_dispatch_packet(client, dir, strlen(dir)+1);
-        if (bytes <= 0) {
+        ret = afc_dispatch_packet(client, dir, strlen(dir)+1, &bytes);
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -445,7 +455,7 @@ afc_error_t afc_read_directory(afc_client_t client, const char *dir, char ***lis
  */
 afc_error_t afc_get_device_info(afc_client_t client, char ***infos)
 {
-        int bytes = 0;
+        uint32_t bytes = 0;
         char *data = NULL, **list = NULL;
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
@@ -457,8 +467,8 @@ afc_error_t afc_get_device_info(afc_client_t client, char ***infos)
         // Send the command
         client->afc_packet->operation = AFC_OP_GET_DEVINFO;
         client->afc_packet->entire_length = client->afc_packet->this_length = 0;
-        bytes = afc_dispatch_packet(client, NULL, 0);
-        if (bytes < 0) {
+        ret = afc_dispatch_packet(client, NULL, 0, &bytes);
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -526,7 +536,7 @@ afc_error_t afc_get_device_info_key(afc_client_t client, const char *key, char *
 afc_error_t afc_remove_path(afc_client_t client, const char *path)
 {
         char *response = NULL;
-        int bytes;
+        uint32_t bytes = 0;
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
         if (!client || !path || !client->afc_packet || !client->connection)
@@ -537,8 +547,8 @@ afc_error_t afc_remove_path(afc_client_t client, const char *path)
         // Send command
         client->afc_packet->this_length = client->afc_packet->entire_length = 0;
         client->afc_packet->operation = AFC_OP_REMOVE_PATH;
-        bytes = afc_dispatch_packet(client, path, strlen(path)+1);
-        if (bytes <= 0) {
+        ret = afc_dispatch_packet(client, path, strlen(path)+1, &bytes);
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -569,7 +579,7 @@ afc_error_t afc_rename_path(afc_client_t client, const char *from, const char *t
 {
         char *response = NULL;
         char *send = (char *) malloc(sizeof(char) * (strlen(from) + strlen(to) + 1 + sizeof(uint32_t)));
-        int bytes = 0;
+        uint32_t bytes = 0;
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
         if (!client || !from || !to || !client->afc_packet || !client->connection)
@@ -582,9 +592,9 @@ afc_error_t afc_rename_path(afc_client_t client, const char *from, const char *t
         memcpy(send + strlen(from) + 1, to, strlen(to) + 1);
         client->afc_packet->entire_length = client->afc_packet->this_length = 0;
         client->afc_packet->operation = AFC_OP_RENAME_PATH;
-        bytes = afc_dispatch_packet(client, send, strlen(to)+1 + strlen(from)+1);
+        ret = afc_dispatch_packet(client, send, strlen(to)+1 + strlen(from)+1, &bytes);
         free(send);
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -609,7 +619,7 @@ afc_error_t afc_rename_path(afc_client_t client, const char *from, const char *t
  */
 afc_error_t afc_make_directory(afc_client_t client, const char *dir)
 {
-        int bytes = 0;
+        uint32_t bytes = 0;
         char *response = NULL;
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
@@ -621,8 +631,8 @@ afc_error_t afc_make_directory(afc_client_t client, const char *dir)
         // Send command
         client->afc_packet->operation = AFC_OP_MAKE_DIR;
         client->afc_packet->this_length = client->afc_packet->entire_length = 0;
-        bytes = afc_dispatch_packet(client, dir, strlen(dir)+1);
-        if (bytes <= 0) {
+        ret = afc_dispatch_packet(client, dir, strlen(dir)+1, &bytes);
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -650,7 +660,7 @@ afc_error_t afc_make_directory(afc_client_t client, const char *dir)
 afc_error_t afc_get_file_info(afc_client_t client, const char *path, char ***infolist)
 {
         char *received = NULL;
-        int bytes;
+        uint32_t bytes = 0;
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
         if (!client || !path || !infolist)
@@ -661,7 +671,11 @@ afc_error_t afc_get_file_info(afc_client_t client, const char *path, char ***inf
         // Send command
         client->afc_packet->operation = AFC_OP_GET_FILE_INFO;
         client->afc_packet->entire_length = client->afc_packet->this_length = 0;
-        afc_dispatch_packet(client, path, strlen(path)+1);
+        ret = afc_dispatch_packet(client, path, strlen(path)+1, &bytes);
+        if (ret != AFC_E_SUCCESS) {
+                afc_unlock(client);
+                return AFC_E_NOT_ENOUGH_DATA;
+        }
 
         // Receive data
         ret = afc_receive_data(client, &received, &bytes);
@@ -692,7 +706,7 @@ afc_file_open(afc_client_t client, const char *filename,
                                          afc_file_mode_t file_mode, uint64_t *handle)
 {
         uint64_t file_mode_loc = GUINT64_TO_LE(file_mode);
-        int bytes = 0;
+        uint32_t bytes = 0;
         char *data = (char *) malloc(sizeof(char) * (8 + strlen(filename) + 1));
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
@@ -710,10 +724,10 @@ afc_file_open(afc_client_t client, const char *filename,
         data[8 + strlen(filename)] = '\0';
         client->afc_packet->operation = AFC_OP_FILE_OPEN;
         client->afc_packet->entire_length = client->afc_packet->this_length = 0;
-        bytes = afc_dispatch_packet(client, data, 8 + strlen(filename) + 1);
+        ret = afc_dispatch_packet(client, data, 8 + strlen(filename) + 1, &bytes);
         free(data);
 
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 log_debug_msg("%s: Didn't receive a response to the command\n", __func__);
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
@@ -742,18 +756,19 @@ afc_file_open(afc_client_t client, const char *filename,
  * @param handle File handle of a previously opened file
  * @param data The pointer to the memory region to store the read data
  * @param length The number of bytes to read
+ * @param bytes_read The number of bytes actually read.
  *
- * @return The number of bytes read if successful. If there was an error -1.
+ * @return AFC_E_SUCCESS on success or an AFC_E_* error value on error.
  */
 iphone_error_t
-afc_file_read(afc_client_t client, uint64_t handle, char *data, int length, uint32_t * bytes)
+afc_file_read(afc_client_t client, uint64_t handle, char *data, uint32_t length, uint32_t *bytes_read)
 {
         char *input = NULL;
-        int current_count = 0, bytes_loc = 0;
-        const int MAXIMUM_READ_SIZE = 1 << 16;
+        uint32_t current_count = 0, bytes_loc = 0;
+        const uint32_t MAXIMUM_READ_SIZE = 1 << 16;
         afc_error_t ret = AFC_E_SUCCESS;
 
-        if (!client || !client->afc_packet || !client->connection || handle == 0 || (length < 0))
+        if (!client || !client->afc_packet || !client->connection || handle == 0)
                 return AFC_E_INVALID_ARGUMENT;
         log_debug_msg("%s: called for length %i\n", __func__, length);
 
@@ -770,10 +785,10 @@ afc_file_read(afc_client_t client, uint64_t handle, char *data, int length, uint
                 packet->size = GUINT64_TO_LE(((length - current_count) < MAXIMUM_READ_SIZE) ? (length - current_count) : MAXIMUM_READ_SIZE);
                 client->afc_packet->operation = AFC_OP_READ;
                 client->afc_packet->entire_length = client->afc_packet->this_length = 0;
-                bytes_loc = afc_dispatch_packet(client, (char *) packet, sizeof(AFCFilePacket));
+                ret = afc_dispatch_packet(client, (char *) packet, sizeof(AFCFilePacket), &bytes_loc);
                 free(packet);
 
-                if (bytes_loc <= 0) {
+                if (ret != AFC_E_SUCCESS) {
                         afc_unlock(client);
                         return AFC_E_NOT_ENOUGH_DATA;
                 }
@@ -788,7 +803,7 @@ afc_file_read(afc_client_t client, uint64_t handle, char *data, int length, uint
                         if (input)
                                 free(input);
                         afc_unlock(client);
-                        *bytes = current_count;
+                        *bytes_read = current_count;
                         /* FIXME: check that's actually a success */
                         return ret;
                 } else {
@@ -804,7 +819,7 @@ afc_file_read(afc_client_t client, uint64_t handle, char *data, int length, uint
         log_debug_msg("%s: returning current_count as %i\n", __func__, current_count);
 
         afc_unlock(client);
-        *bytes = current_count;
+        *bytes_read = current_count;
         return ret;
 }
 
@@ -814,23 +829,22 @@ afc_file_read(afc_client_t client, uint64_t handle, char *data, int length, uint
  * @param handle File handle of previously opened file. 
  * @param data The data to write to the file.
  * @param length How much data to write.
+ * @param bytes_written The number of bytes actually written to the file.
  * 
- * @return The number of bytes written to the file, or a value less than 0 if
- *         none were written...
+ * @return AFC_E_SUCCESS on success, or an AFC_E_* error value on error.
  */
 iphone_error_t
-afc_file_write(afc_client_t client, uint64_t handle,
-                                          const char *data, int length, uint32_t * bytes)
+afc_file_write(afc_client_t client, uint64_t handle, const char *data, uint32_t length, uint32_t *bytes_written)
 {
         char *acknowledgement = NULL;
-        const int MAXIMUM_WRITE_SIZE = 1 << 15;
+        const uint32_t MAXIMUM_WRITE_SIZE = 1 << 15;
         uint32_t current_count = 0, i = 0;
         uint32_t segments = (length / MAXIMUM_WRITE_SIZE);
-        int bytes_loc = 0;
+        uint32_t bytes_loc = 0;
         char *out_buffer = NULL;
         afc_error_t ret = AFC_E_SUCCESS;
 
-        if (!client || !client->afc_packet || !client->connection || !bytes || (handle == 0) || (length < 0))
+        if (!client || !client->afc_packet || !client->connection || !bytes_written || (handle == 0))
                 return AFC_E_INVALID_ARGUMENT;
 
         afc_lock(client);
@@ -846,8 +860,8 @@ afc_file_write(afc_client_t client, uint64_t handle,
                 out_buffer = (char *) malloc(sizeof(char) * client->afc_packet->entire_length - sizeof(AFCPacket));
                 memcpy(out_buffer, (char *)&handle, sizeof(uint64_t));
                 memcpy(out_buffer + 8, data + current_count, MAXIMUM_WRITE_SIZE);
-                bytes_loc = afc_dispatch_packet(client, out_buffer, MAXIMUM_WRITE_SIZE + 8);
-                if (bytes_loc < 0) {
+                ret = afc_dispatch_packet(client, out_buffer, MAXIMUM_WRITE_SIZE + 8, &bytes_loc);
+                if (ret != AFC_E_SUCCESS) {
                         afc_unlock(client);
                         return AFC_E_NOT_ENOUGH_DATA;
                 }
@@ -868,9 +882,9 @@ afc_file_write(afc_client_t client, uint64_t handle,
         // didn't get sent in the for loop
         // this length is fine because it's always sizeof(AFCPacket) + 8, but
         // to be sure we do it again
-        if (current_count == (uint32_t)length) {
+        if (current_count == length) {
                 afc_unlock(client);
-                *bytes = current_count;
+                *bytes_written = current_count;
                 return ret;
         }
 
@@ -880,15 +894,15 @@ afc_file_write(afc_client_t client, uint64_t handle,
         out_buffer = (char *) malloc(sizeof(char) * client->afc_packet->entire_length - sizeof(AFCPacket));
         memcpy(out_buffer, (char *) &handle, sizeof(uint64_t));
         memcpy(out_buffer + 8, data + current_count, (length - current_count));
-        bytes_loc = afc_dispatch_packet(client, out_buffer, (length - current_count) + 8);
+        ret = afc_dispatch_packet(client, out_buffer, (length - current_count) + 8, &bytes_loc);
         free(out_buffer);
         out_buffer = NULL;
 
         current_count += bytes_loc;
 
-        if (bytes_loc <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
-                *bytes = current_count;
+                *bytes_written = current_count;
                 return AFC_E_SUCCESS;
         }
 
@@ -899,7 +913,7 @@ afc_file_write(afc_client_t client, uint64_t handle,
         } else {
                 free(acknowledgement);
         }
-        *bytes = current_count;
+        *bytes_written = current_count;
         return ret;
 }
 
@@ -911,7 +925,7 @@ afc_file_write(afc_client_t client, uint64_t handle,
 afc_error_t afc_file_close(afc_client_t client, uint64_t handle)
 {
         char *buffer = malloc(sizeof(char) * 8);
-        int bytes = 0;
+        uint32_t bytes = 0;
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
         if (!client || (handle == 0))
@@ -925,11 +939,11 @@ afc_error_t afc_file_close(afc_client_t client, uint64_t handle)
         memcpy(buffer, &handle, sizeof(uint64_t));
         client->afc_packet->operation = AFC_OP_FILE_CLOSE;
         client->afc_packet->entire_length = client->afc_packet->this_length = 0;
-        bytes = afc_dispatch_packet(client, buffer, 8);
+        ret = afc_dispatch_packet(client, buffer, 8, &bytes);
         free(buffer);
         buffer = NULL;
 
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_UNKNOWN_ERROR;
         }
@@ -958,7 +972,7 @@ afc_error_t afc_file_close(afc_client_t client, uint64_t handle)
 afc_error_t afc_file_lock(afc_client_t client, uint64_t handle, afc_lock_op_t operation)
 {
         char *buffer = malloc(16);
-        int bytes = 0;
+        uint32_t bytes = 0;
         uint64_t op = GUINT64_TO_LE(operation);
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
@@ -975,11 +989,11 @@ afc_error_t afc_file_lock(afc_client_t client, uint64_t handle, afc_lock_op_t op
 
         client->afc_packet->operation = AFC_OP_FILE_LOCK;
         client->afc_packet->entire_length = client->afc_packet->this_length = 0;
-        bytes = afc_dispatch_packet(client, buffer, 16);
+        ret = afc_dispatch_packet(client, buffer, 16, &bytes);
         free(buffer);
         buffer = NULL;
 
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 log_debug_msg("%s: could not send lock command\n", __func__);
                 return AFC_E_UNKNOWN_ERROR;
@@ -1009,7 +1023,7 @@ afc_error_t afc_file_seek(afc_client_t client, uint64_t handle, int64_t offset,
         char *buffer = (char *) malloc(sizeof(char) * 24);
         int64_t offset_loc = (int64_t)GUINT64_TO_LE(offset);
         uint64_t whence_loc = GUINT64_TO_LE(whence);
-        int bytes = 0;
+        uint32_t bytes = 0;
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
         if (!client || (handle == 0))
@@ -1023,11 +1037,11 @@ afc_error_t afc_file_seek(afc_client_t client, uint64_t handle, int64_t offset,
         memcpy(buffer + 16, &offset_loc, sizeof(uint64_t));     // offset
         client->afc_packet->operation = AFC_OP_FILE_SEEK;
         client->afc_packet->this_length = client->afc_packet->entire_length = 0;
-        bytes = afc_dispatch_packet(client, buffer, 24);
+        ret = afc_dispatch_packet(client, buffer, 24, &bytes);
         free(buffer);
         buffer = NULL;
 
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -1052,7 +1066,7 @@ afc_error_t afc_file_seek(afc_client_t client, uint64_t handle, int64_t offset,
 afc_error_t afc_file_tell(afc_client_t client, uint64_t handle, uint64_t *position)
 {
         char *buffer = (char *) malloc(sizeof(char) * 8);
-        int bytes = 0;
+        uint32_t bytes = 0;
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
         if (!client || (handle == 0))
@@ -1064,11 +1078,11 @@ afc_error_t afc_file_tell(afc_client_t client, uint64_t handle, uint64_t *positi
         memcpy(buffer, &handle, sizeof(uint64_t));      // handle
         client->afc_packet->operation = AFC_OP_FILE_TELL;
         client->afc_packet->this_length = client->afc_packet->entire_length = 0;
-        bytes = afc_dispatch_packet(client, buffer, 8);
+        ret = afc_dispatch_packet(client, buffer, 8, &bytes);
         free(buffer);
         buffer = NULL;
 
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -1102,7 +1116,7 @@ afc_error_t afc_file_tell(afc_client_t client, uint64_t handle, uint64_t *positi
 afc_error_t afc_file_truncate(afc_client_t client, uint64_t handle, uint64_t newsize)
 {
         char *buffer = (char *) malloc(sizeof(char) * 16);
-        int bytes = 0;
+        uint32_t bytes = 0;
         uint64_t newsize_loc = GUINT64_TO_LE(newsize);
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
@@ -1116,11 +1130,11 @@ afc_error_t afc_file_truncate(afc_client_t client, uint64_t handle, uint64_t new
         memcpy(buffer + 8, &newsize_loc, sizeof(uint64_t));     // newsize
         client->afc_packet->operation = AFC_OP_FILE_SET_SIZE;
         client->afc_packet->this_length = client->afc_packet->entire_length = 0;
-        bytes = afc_dispatch_packet(client, buffer, 16);
+        ret = afc_dispatch_packet(client, buffer, 16, &bytes);
         free(buffer);
         buffer = NULL;
 
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -1147,7 +1161,7 @@ afc_error_t afc_truncate(afc_client_t client, const char *path, off_t newsize)
 {
         char *response = NULL;
         char *send = (char *) malloc(sizeof(char) * (strlen(path) + 1 + 8));
-        int bytes = 0;
+        uint32_t bytes = 0;
         uint64_t size_requested = GUINT64_TO_LE(newsize);
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
@@ -1161,9 +1175,9 @@ afc_error_t afc_truncate(afc_client_t client, const char *path, off_t newsize)
         memcpy(send + 8, path, strlen(path) + 1);
         client->afc_packet->entire_length = client->afc_packet->this_length = 0;
         client->afc_packet->operation = AFC_OP_TRUNCATE;
-        bytes = afc_dispatch_packet(client, send, 8 + strlen(path) + 1);
+        ret = afc_dispatch_packet(client, send, 8 + strlen(path) + 1, &bytes);
         free(send);
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -1191,7 +1205,7 @@ afc_error_t afc_make_link(afc_client_t client, afc_link_type_t linktype, const c
 {
         char *response = NULL;
         char *send = (char *) malloc(sizeof(char) * (strlen(target)+1 + strlen(linkname)+1 + 8));
-        int bytes = 0;
+        uint32_t bytes = 0;
         uint64_t type = GUINT64_TO_LE(linktype);
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
@@ -1210,9 +1224,9 @@ afc_error_t afc_make_link(afc_client_t client, afc_link_type_t linktype, const c
         memcpy(send + 8 + strlen(target) + 1, linkname, strlen(linkname) + 1);
         client->afc_packet->entire_length = client->afc_packet->this_length = 0;
         client->afc_packet->operation = AFC_OP_MAKE_LINK;
-        bytes = afc_dispatch_packet(client, send, 8 + strlen(linkname) + 1 + strlen(target) + 1);
+        ret = afc_dispatch_packet(client, send, 8 + strlen(linkname) + 1 + strlen(target) + 1, &bytes);
         free(send);
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }
@@ -1239,7 +1253,7 @@ afc_error_t afc_set_file_time(afc_client_t client, const char *path, uint64_t mt
 {
         char *response = NULL;
         char *send = (char *) malloc(sizeof(char) * (strlen(path) + 1 + 8));
-        int bytes = 0;
+        uint32_t bytes = 0;
         uint64_t mtime_loc = GUINT64_TO_LE(mtime);
         afc_error_t ret = AFC_E_UNKNOWN_ERROR;
 
@@ -1253,9 +1267,9 @@ afc_error_t afc_set_file_time(afc_client_t client, const char *path, uint64_t mt
         memcpy(send + 8, path, strlen(path) + 1);
         client->afc_packet->entire_length = client->afc_packet->this_length = 0;
         client->afc_packet->operation = AFC_OP_SET_FILE_TIME;
-        bytes = afc_dispatch_packet(client, send, 8 + strlen(path) + 1);
+        ret = afc_dispatch_packet(client, send, 8 + strlen(path) + 1, &bytes);
         free(send);
-        if (bytes <= 0) {
+        if (ret != AFC_E_SUCCESS) {
                 afc_unlock(client);
                 return AFC_E_NOT_ENOUGH_DATA;
         }