diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/AFC.c | 724 |
1 files changed, 511 insertions, 213 deletions
@@ -19,122 +19,182 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#include <stdio.h> #include "AFC.h" #include "plist.h" + // This is the maximum size an AFC data packet can be const int MAXIMUM_PACKET_SIZE = (2 << 15) - 32; extern int debug; - -/* Locking, for thread-safety (well... kind of, hehe) */ +/** Locks an AFC client, done for thread safety stuff + * + * @param client The AFC client connection to lock + */ static void afc_lock(AFClient *client) { - if (debug) printf("In the midst of a lock...\n"); + if (debug) fprintf(stderr, "Locked\n"); while (client->lock) { usleep(500); // they say it's obsolete, but whatever } client->lock = 1; } +/** Unlocks an AFC client, done for thread safety stuff. + * + * @param client The AFC + */ static void afc_unlock(AFClient *client) { // just to be pretty - if (debug) printf("Unlock!\n"); + if (debug) fprintf(stderr, "Unlocked\n"); client->lock = 0; } -/* main AFC functions */ - +/** Makes a connection to the AFC service on the phone. + * + * @param phone The iPhone to connect on. + * @param s_port The source port. + * @param d_port The destination port. + * + * @return A handle to the newly-connected client or NULL upon error. + */ AFClient *afc_connect(iPhone *phone, int s_port, int d_port) { - if (!phone) return NULL; AFClient *client = (AFClient*)malloc(sizeof(AFClient)); + + if (!phone) return NULL; + + // Attempt connection client->connection = mux_connect(phone, s_port, d_port); - if (!client->connection) { free(client); return NULL; } - else { - client->afc_packet = (AFCPacket*)malloc(sizeof(AFCPacket)); - if (client->afc_packet) { - client->afc_packet->packet_num = 0; - client->afc_packet->unknown1 = client->afc_packet->unknown2 = client->afc_packet->unknown3 = client->afc_packet->unknown4 = client->afc_packet->entire_length = client->afc_packet->this_length = 0; - client->afc_packet->header1 = 0x36414643; - client->afc_packet->header2 = 0x4141504C; - client->file_handle = 0; - client->lock = 0; - return client; - } else { - mux_close_connection(client->connection); - free(client); - return NULL; - } + if (!client->connection) { + free(client); + return NULL; } - - return NULL; // should never get to this point + + // Allocate a packet + client->afc_packet = (AFCPacket*)malloc(sizeof(AFCPacket)); + if (!client->afc_packet) { + mux_close_connection(client->connection); + free(client); + return NULL; + } + + client->afc_packet->packet_num = 0; + client->afc_packet->unknown1 = 0; + client->afc_packet->unknown2 = 0; + client->afc_packet->unknown3 = 0; + client->afc_packet->unknown4 = 0; + client->afc_packet->entire_length = 0; + client->afc_packet->this_length = 0; + client->afc_packet->header1 = 0x36414643; + client->afc_packet->header2 = 0x4141504C; + client->file_handle = 0; + client->lock = 0; + + return client; } +/** Disconnects an AFC client from the phone. + * + * @param client The client to disconnect. + */ + void afc_disconnect(AFClient *client) { - // client and its members should never be NULL is assumed here. if (!client || !client->connection || !client->afc_packet) return; + mux_close_connection(client->connection); free(client->afc_packet); free(client); } -static int count_nullspaces(char *string, int number) { - int i = 0, nulls = 0; - for (i = 0; i < number; i++) { - if (string[i] == '\0') nulls++; - } - return nulls; -} +/** Dispatches an AFC packet over a 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. + * + * @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 dispatch_AFC_packet(AFClient *client, const char *data, int length) { int bytes = 0, offset = 0; + char *buffer; + if (!client || !client->connection || !client->afc_packet) return 0; if (!data || !length) length = 0; client->afc_packet->packet_num++; - if (!client->afc_packet->entire_length) client->afc_packet->entire_length = client->afc_packet->this_length = (length) ? sizeof(AFCPacket) + length + 1 : sizeof(AFCPacket); - if (!client->afc_packet->this_length) client->afc_packet->this_length = sizeof(AFCPacket); - + if (!client->afc_packet->entire_length) { + client->afc_packet->entire_length = (length) ? sizeof(AFCPacket) + length + 1 : sizeof(AFCPacket); + client->afc_packet->this_length = client->afc_packet->entire_length; + } + if (!client->afc_packet->this_length){ + client->afc_packet->this_length = sizeof(AFCPacket); + } + + // We want to send two segments; buffer+sizeof(AFCPacket) to this_length is the parameters + // And everything beyond that is the next packet. (for writing) if (client->afc_packet->this_length != client->afc_packet->entire_length) { - // We want to send two segments; buffer+sizeof(AFCPacket) to this_length is the parameters - // And everything beyond that is the next packet. (for writing) - char *buffer = (char*)malloc(client->afc_packet->this_length); + buffer = (char*)malloc(client->afc_packet->this_length); memcpy(buffer, (char*)client->afc_packet, sizeof(AFCPacket)); offset = client->afc_packet->this_length - sizeof(AFCPacket); - if (debug) printf("dispatch_AFC_packet: Offset: %i\n", offset); + + if (debug) fprintf(stderr, "dispatch_AFC_packet: Offset: %i\n", offset); if ((length) < (client->afc_packet->entire_length - client->afc_packet->this_length)) { - if (debug) printf("dispatch_AFC_packet: Length did not resemble what it was supposed to based on the packet.\nlength minus offset: %i\nrest of packet: %i\n", length-offset, client->afc_packet->entire_length - client->afc_packet->this_length); + if (debug){ + fprintf(stderr, "dispatch_AFC_packet: Length did not resemble what it was supposed"); + fprintf(stderr, "to based on the packet.\n"); + fprintf(stderr, "length minus offset: %i\n", length-offset); + fprintf(stderr, "rest of packet: %i\n", client->afc_packet->entire_length - client->afc_packet->this_length); + } free(buffer); return -1; } - if (debug) printf("dispatch_AFC_packet: fucked-up packet method (probably a write)\n"); memcpy(buffer+sizeof(AFCPacket), data, offset); bytes = mux_send(client->connection, buffer, client->afc_packet->this_length); free(buffer); - if (bytes <= 0) { return bytes; } + if (bytes <= 0) { + return bytes; + } + if (debug) { - printf("dispatch_AFC_packet: sent the first now go with the second\n"); - printf("Length: %i\n", length-offset); - printf("Buffer: \n"); + fprintf(stderr, "dispatch_AFC_packet: sent the first now go with the second\n"); + fprintf(stderr, "Length: %i\n", length-offset); + fprintf(stderr, "Buffer: \n"); fwrite(data+offset, 1, length-offset, stdout); } - bytes = mux_send(client->connection, data+offset, length-offset); return bytes; } else { - if (debug) printf("dispatch_AFC_packet doin things the old way\n"); + if (debug) fprintf(stderr, "dispatch_AFC_packet doin things the old way\n"); char *buffer = (char*)malloc(sizeof(char) * client->afc_packet->this_length); - if (debug) printf("dispatch_AFC_packet packet length = %i\n", client->afc_packet->this_length); + if (debug) fprintf(stderr, "dispatch_AFC_packet packet length = %i\n", client->afc_packet->this_length); memcpy(buffer, (char*)client->afc_packet, sizeof(AFCPacket)); - if (debug) printf("dispatch_AFC_packet packet data follows\n"); + if (debug) fprintf(stderr, "dispatch_AFC_packet packet data follows\n"); if (length > 0) { memcpy(buffer+sizeof(AFCPacket), data, length); buffer[sizeof(AFCPacket)+length] = '\0'; } if (debug) fwrite(buffer, 1, client->afc_packet->this_length, stdout); - if (debug) printf("\n"); + if (debug) fprintf(stderr, "\n"); bytes = mux_send(client->connection, buffer, client->afc_packet->this_length); return bytes; } return -1; } +/** 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. + * + * @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) + */ + static int receive_AFC_data(AFClient *client, char **dump_here) { AFCPacket *r_packet; char *buffer = (char*)malloc(sizeof(AFCPacket) * 4); @@ -145,7 +205,7 @@ static int receive_AFC_data(AFClient *client, char **dump_here) { bytes = mux_recv(client->connection, buffer, sizeof(AFCPacket) * 4); if (bytes <= 0) { free(buffer); - printf("Just didn't get enough.\n"); + fprintf(stderr, "Just didn't get enough.\n"); *dump_here = NULL; return -1; } @@ -165,25 +225,22 @@ static int receive_AFC_data(AFClient *client, char **dump_here) { uint32 param1 = buffer[sizeof(AFCPacket)]; free(buffer); - if (r_packet->operation == AFC_ERROR - && !(client->afc_packet->operation == AFC_DELETE && param1 == 7) - ) - { - if (debug) printf("Oops? Bad operation code received: 0x%X, operation=0x%X, param1=%d\n", + if (r_packet->operation == AFC_ERROR && !(client->afc_packet->operation == AFC_DELETE && param1 == 7)) { + if (debug) fprintf(stderr, "Oops? Bad operation code received: 0x%X, operation=0x%X, param1=%d\n", r_packet->operation, client->afc_packet->operation, param1); recv_len = r_packet->entire_length - r_packet->this_length; - if (debug) printf("recv_len=%d\n", recv_len); + if (debug) fprintf(stderr, "recv_len=%d\n", recv_len); if(param1 == 0) { - if (debug) printf("... false alarm, but still\n"); + if (debug) fprintf(stderr, "... false alarm, but still\n"); *dump_here = NULL; return 0; } - else { if (debug) printf("Errno %i\n", param1); } + else { if (debug) fprintf(stderr, "Errno %i\n", param1); } free(r_packet); *dump_here = NULL; return -1; } else { - if (debug) printf("Operation code %x\nFull length %i and this length %i\n", r_packet->operation, r_packet->entire_length, r_packet->this_length); + if (debug) fprintf(stderr, "Operation code %x\nFull length %i and this length %i\n", r_packet->operation, r_packet->entire_length, r_packet->this_length); } recv_len = r_packet->entire_length - r_packet->this_length; @@ -199,21 +256,20 @@ static int receive_AFC_data(AFClient *client, char **dump_here) { final_buffer = (char*)malloc(sizeof(char) * recv_len); while(current_count < recv_len){ bytes = mux_recv(client->connection, buffer, recv_len-current_count); - if (debug) printf("receive_AFC_data: still collecting packets\n"); + if (debug) fprintf(stderr, "receive_AFC_data: still collecting packets\n"); if (bytes < 0) { - if(debug) printf("receive_AFC_data: mux_recv failed: %d\n", bytes); + if(debug) fprintf(stderr, "receive_AFC_data: mux_recv failed: %d\n", bytes); break; } if (bytes > recv_len-current_count) { - if(debug) printf("receive_AFC_data: mux_recv delivered too much data\n"); + if(debug) fprintf(stderr, "receive_AFC_data: mux_recv delivered too much data\n"); break; } if (strstr(buffer, "CFA6LPAA")) { - if (debug) printf("receive_AFC_data: WARNING: there is AFC data in this packet at %ti\n", strstr(buffer, "CFA6LPAA") - buffer); - if (debug) printf("receive_AFC_data: the total packet length is %i\n", bytes); - //continue; // but we do need to continue because packets/headers != data + if (debug) fprintf(stderr, "receive_AFC_data: WARNING: there is AFC data in this packet at %ti\n", strstr(buffer, "CFA6LPAA") - buffer); + if (debug) fprintf(stderr, "receive_AFC_data: the total packet length is %i\n", bytes); } memcpy(final_buffer+current_count, buffer, bytes); @@ -221,22 +277,26 @@ static int receive_AFC_data(AFClient *client, char **dump_here) { } 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 = final_buffer; // what they do beyond this point = not my problem + *dump_here = final_buffer; return current_count; } +static int count_nullspaces(char *string, int number) { + int i = 0, nulls = 0; + + for (i = 0; i < number; i++) { + if (string[i] == '\0') nulls++; + } + + return nulls; +} + static char **make_strings_list(char *tokens, int true_length) { - if (!tokens || !true_length) return NULL; int nulls = 0, i = 0, j = 0; char **list = NULL; + if (!tokens || !true_length) return NULL; + nulls = count_nullspaces(tokens, true_length); list = (char**)malloc(sizeof(char*) * (nulls + 1)); for (i = 0; i < nulls; i++) { @@ -244,118 +304,242 @@ static char **make_strings_list(char *tokens, int true_length) { j += strlen(list[i]) + 1; } list[i] = strdup(""); + return list; } +/** Gets a directory listing of the directory requested. + * + * @param client The client to get a directory listing from. + * @param dir The directory to list. (must be a fully-qualified path) + * + * @return A char ** list of files in that directory, terminated by an empty + * string for now or NULL if there was an error. + */ char **afc_get_dir_list(AFClient *client, const char *dir) { + int bytes = 0; + char *data = NULL, **list = NULL; + + if (!client || !dir) return NULL; + afc_lock(client); + + // Send the command client->afc_packet->operation = AFC_LIST_DIR; - int bytes = 0; - char *blah = NULL, **list = NULL; - client->afc_packet->entire_length = client->afc_packet->this_length = 0; + client->afc_packet->entire_length = 0; + client->afc_packet->this_length = 0; bytes = dispatch_AFC_packet(client, dir, strlen(dir)); - if (bytes <= 0) { afc_unlock(client); return NULL; } + if (bytes <= 0) { + afc_unlock(client); + return NULL; + } - bytes = receive_AFC_data(client, &blah); - if (bytes < 0 && !blah) { afc_unlock(client); return NULL; } + // Receive the data + bytes = receive_AFC_data(client, &data); + if (bytes < 0 && !data) { + afc_unlock(client); + return NULL; + } - list = make_strings_list(blah, bytes); - free(blah); + // Parse the data + list = make_strings_list(data, bytes); + if (data) free(data); + afc_unlock(client); + return list; } +/** Get device info for a client connection to phone. (free space on disk, etc.) + * + * @param client The client to get device info for. + * + * @return A char ** list of parameters as given by AFC or NULL if there was an + * error. + */ char **afc_get_devinfo(AFClient *client) { + int bytes = 0; + char *data = NULL, **list = NULL; + + if (!client) return NULL; + afc_lock(client); + + // Send the command client->afc_packet->operation = AFC_GET_DEVINFO; - int bytes = 0; - char *blah = NULL, **list = NULL; client->afc_packet->entire_length = client->afc_packet->this_length = 0; bytes = dispatch_AFC_packet(client, NULL, 0); - if (bytes < 0) { afc_unlock(client); return NULL; } + if (bytes < 0) { + afc_unlock(client); + return NULL; + } - bytes = receive_AFC_data(client, &blah); - if (bytes < 0 && !blah) { afc_unlock(client); return NULL; } + // Receive the data + bytes = receive_AFC_data(client, &data); + if (bytes < 0 && !data) { + afc_unlock(client); + return NULL; + } + + // Parse the data + list = make_strings_list(data, bytes); + if (data) free(data); - list = make_strings_list(blah, bytes); - free(blah); afc_unlock(client); + return list; } - +/** Deletes a file. + * + * @param client The client to have delete the file. + * @param path The file to delete. (must be a fully-qualified path) + * + * @return 1 on success, 0 on failure. + */ int afc_delete_file(AFClient *client, const char *path) { + char *response = NULL; + int bytes; + if (!client || !path || !client->afc_packet || !client->connection) return 0; + afc_lock(client); - char *receive = NULL; + + // Send command client->afc_packet->this_length = client->afc_packet->entire_length = 0; client->afc_packet->operation = AFC_DELETE; - int bytes; bytes = dispatch_AFC_packet(client, path, strlen(path)); - if (bytes <= 0) { afc_unlock(client); return 0; } + if (bytes <= 0) { + afc_unlock(client); + return 0; + } + + // Receive response + bytes = receive_AFC_data(client, &response); + if (response) free(response); - bytes = receive_AFC_data(client, &receive); - free(receive); afc_unlock(client); - if (bytes < 0) { return 0; } - else return 1; + + if (bytes < 0) { + return 0; + } else { + return 1; + } } +/** Renames a file on the phone. + * + * @param client The client to have rename the file. + * @param from The file to rename. (must be a fully-qualified path) + * @param to The new name of the file. (must also be a fully-qualified path) + * + * @return 1 on success, 0 on failure. + */ int afc_rename_file(AFClient *client, const char *from, const char *to) { - if (!client || !from || !to || !client->afc_packet || !client->connection) return 0; - afc_lock(client); - char *receive = NULL; + char *response = NULL; char *send = (char*)malloc(sizeof(char) * (strlen(from) + strlen(to) + 1 + sizeof(uint32))); int bytes = 0; + if (!client || !from || !to || !client->afc_packet || !client->connection) return 0; + + afc_lock(client); + + // Send command memcpy(send, from, strlen(from)+1); memcpy(send+strlen(from)+1, to, strlen(to)); - fwrite(send, 1, strlen(from)+1+strlen(to), stdout); - printf("\n"); client->afc_packet->entire_length = client->afc_packet->this_length = 0; client->afc_packet->operation = AFC_RENAME; bytes = dispatch_AFC_packet(client, send, strlen(to) + strlen(from) + 2); - if (bytes <= 0) { afc_unlock(client); return 0; } + if (bytes <= 0) { + afc_unlock(client); + return 0; + } - bytes = receive_AFC_data(client, &receive); - free(receive); + // Receive response + bytes = receive_AFC_data(client, &response); + if (response) free(response); + afc_unlock(client); - if (bytes < 0) return 0; - else return 1; + + if (bytes < 0) { + return 0; + } else { + return 1; + } } +/** Creates a directory on the phone. + * + * @param client The client to use to make a directory. + * @param dir The directory's path. (must be a fully-qualified path, I assume + * all other mkdir restrictions apply as well) + * + * @return 1 on success, 0 on failure. + */ + int afc_mkdir(AFClient *client, const char *dir) { + int bytes = 0; + char *response = NULL; + if (!client) return 0; + afc_lock(client); - int bytes = 0; - char *recvd = NULL; + // Send command client->afc_packet->operation = AFC_MAKE_DIR; client->afc_packet->this_length = client->afc_packet->entire_length = 0; bytes = dispatch_AFC_packet(client, dir, strlen(dir)); - if (bytes <= 0) { afc_unlock(client); return 0; } + if (bytes <= 0) { + afc_unlock(client); + return 0; + } - bytes = receive_AFC_data(client, &recvd); + // Receive response + bytes = receive_AFC_data(client, &response); + if (response) free(response); + afc_unlock(client); - if (recvd) { free(recvd); recvd = NULL; } - if (bytes == 0) return 1; - else return 0; + + if (bytes == 0) { + return 1; + } else { + return 0; + } } +/** Gets information about a specific file. + * + * @param client The client to use to get the information of the file. + * @param path The fully-qualified path to the file. + * + * @return A pointer to an AFCFile struct containing the information received, + * or NULL on failure. + */ AFCFile *afc_get_file_info(AFClient *client, const char *path) { - client->afc_packet->operation = AFC_GET_INFO; - client->afc_packet->entire_length = client->afc_packet->this_length = 0; - afc_lock(client); - dispatch_AFC_packet(client, path, strlen(path)); - char *received, **list; AFCFile *my_file; int length, i = 0; + afc_lock(client); + + // Send command + client->afc_packet->operation = AFC_GET_INFO; + client->afc_packet->entire_length = client->afc_packet->this_length = 0; + dispatch_AFC_packet(client, path, strlen(path)); + + // Receive data length = receive_AFC_data(client, &received); - list = make_strings_list(received, length); - free(received); - afc_unlock(client); // the rest is just interpretation anyway + if (received) { + list = make_strings_list(received, length); + free(received); + } else { + afc_unlock(client); + return NULL; + } + + afc_unlock(client); + + // Parse the data if (list) { my_file = (AFCFile *)malloc(sizeof(AFCFile)); for (i = 0; strcmp(list[i], ""); i++) { @@ -383,42 +567,62 @@ AFCFile *afc_get_file_info(AFClient *client, const char *path) { } } +/** Opens a file on the phone. + * + * @param client The client to use to open the file. + * @param filename The file to open. (must be a fully-qualified path) + * @param file_mode The mode to use to open the file. Can be AFC_FILE_READ or + * AFC_FILE_WRITE; the former lets you read and write, + * however, and the second one will *create* the file, + * destroying anything previously there. + * + * @return A pointer to an AFCFile struct containing the file information (as + * received by afc_get_file_info) as well as the handle to the file or + * NULL in the case of failure. + */ AFCFile *afc_open_file(AFClient *client, const char *filename, uint32 file_mode) { - //if (file_mode != AFC_FILE_READ && file_mode != AFC_FILE_WRITE) return NULL; - if (!client ||!client->connection || !client->afc_packet) return NULL; - afc_lock(client); - char *further_data = (char*)malloc(sizeof(char) * (8 + strlen(filename) + 1)); AFCFile *file_infos = NULL; - memcpy(further_data, &file_mode, 4); uint32 ag = 0; - memcpy(further_data+4, &ag, 4); - memcpy(further_data+8, filename, strlen(filename)); - further_data[8+strlen(filename)] = '\0'; - int bytes = 0, length_thing = 0; - client->afc_packet->operation = AFC_FILE_OPEN; + int bytes = 0, length = 0; + char *data = (char*)malloc(sizeof(char) * (8 + strlen(filename) + 1)); + + if (!client ||!client->connection || !client->afc_packet) return NULL; + + afc_lock(client); + // Send command + memcpy(data, &file_mode, 4); + memcpy(data+4, &ag, 4); + memcpy(data+8, filename, strlen(filename)); + data[8+strlen(filename)] = '\0'; + client->afc_packet->operation = AFC_FILE_OPEN; client->afc_packet->entire_length = client->afc_packet->this_length = 0; - bytes = dispatch_AFC_packet(client, further_data, 8+strlen(filename)); - free(further_data); + bytes = dispatch_AFC_packet(client, data, 8+strlen(filename)); + free(data); + if (bytes <= 0) { - if (debug) printf("didn't read enough\n"); + if (debug) fprintf(stderr, "afc_open_file: Didn't receive a response to the command\n"); afc_unlock(client); return NULL; + } + + // Receive the data + length = receive_AFC_data(client, &data); + if (length > 0 && data) { + afc_unlock(client); + + // Get the file info and return it + file_infos = afc_get_file_info(client, filename); + memcpy(&file_infos->filehandle, data, 4); + return file_infos; } else { - length_thing = receive_AFC_data(client, &further_data); - if (length_thing > 0 && further_data) { - afc_unlock(client); // don't want to hang on the next call... and besides, it'll re-lock, do its thing, and unlock again anyway. - file_infos = afc_get_file_info(client, filename); - memcpy(&file_infos->filehandle, further_data, 4); - return file_infos; - } else { - if (debug) printf("didn't get further data or something\n"); - afc_unlock(client); - return NULL; - } + if (debug) fprintf(stderr, "afc_open_file: Didn't get any further data\n"); + afc_unlock(client); + return NULL; } - if (debug) printf("what the fuck\n"); + afc_unlock(client); + return NULL; } @@ -429,22 +633,21 @@ AFCFile *afc_open_file(AFClient *client, const char *filename, uint32 file_mode) * @param data The pointer to the memory region to store the read data * @param length The number of bytes to read * - * @return The number of bytes read if successful. If there was an error + * @return The number of bytes read if successful. If there was an error -1. */ int afc_read_file(AFClient *client, AFCFile *file, char *data, int length) { - if (!client || !client->afc_packet || !client->connection || !file) return -1; - if (debug) printf("afc_read_file called for length %i\n", length); - char *input = NULL; int current_count = 0, bytes = 0; const int MAXIMUM_READ_SIZE = 1 << 16; - afc_lock(client); + if (!client || !client->afc_packet || !client->connection || !file) return -1; + if (debug) fprintf(stderr, "afc_read_file called for length %i\n", length); + afc_lock(client); // Looping here to get around the maximum amount of data that recieve_AFC_data can handle while (current_count < length){ - if (debug) printf("afc_read_file: current count is %i but length is %i\n", current_count, length); + if (debug) fprintf(stderr, "afc_read_file: current count is %i but length is %i\n", current_count, length); // Send the read command AFCFilePacket *packet = (AFCFilePacket*)malloc(sizeof(AFCFilePacket)); @@ -455,120 +658,182 @@ int afc_read_file(AFClient *client, AFCFile *file, char *data, int length) { client->afc_packet->entire_length = client->afc_packet->this_length = 0; bytes = dispatch_AFC_packet(client, (char*)packet, sizeof(AFCFilePacket)); - // If we get a positive reponse to the command gather the data - if (bytes > 0) { - bytes = receive_AFC_data(client, &input); - if (debug) printf("afc_read_file: bytes returned: %i\n", bytes); - if (bytes < 0) { - if (input) free(input); - afc_unlock(client); - return -1; - } else if (bytes == 0) { - if (input) free(input); - afc_unlock(client); - return current_count; - } else { - if (input) { - if (debug) printf("afc_read_file: %d\n", bytes); - memcpy(data+current_count, input, (bytes > length) ? length : bytes); - free(input); - input = NULL; - current_count += (bytes > length) ? length : bytes; - } - } - } else { + if (bytes <= 0) { afc_unlock(client); return -1; } + + // Receive the data + bytes = receive_AFC_data(client, &input); + if (debug) fprintf(stderr, "afc_read_file: bytes returned: %i\n", bytes); + if (bytes < 0) { + if (input) free(input); + afc_unlock(client); + return -1; + } else if (bytes == 0) { + if (input) free(input); + afc_unlock(client); + return current_count; + } else { + if (input) { + if (debug) fprintf(stderr, "afc_read_file: %d\n", bytes); + memcpy(data+current_count, input, (bytes > length) ? length : bytes); + free(input); + input = NULL; + current_count += (bytes > length) ? length : bytes; + } + } } + if (debug) fprintf(stderr, "afc_read_file: returning current_count as %i\n", current_count); + afc_unlock(client); - if (debug) printf("afc_read_file: returning current_count as %i\n", current_count); + return current_count; } +/** Writes a given number of bytes to a file. + * + * @param client The client to use to write to the file. + * @param file A pointer to an AFCFile struct; serves as the file handle. + * @param data The data to write to the file. + * @param length How much data to write. + * + * @return The number of bytes written to the file, or a value less than 0 if + * none were written... + */ + int afc_write_file(AFClient *client, AFCFile *file, const char *data, int length) { char *acknowledgement = NULL; - if (!client ||!client->afc_packet || !client->connection || !file) return -1; - afc_lock(client); - if (debug) printf("afc_write_file: Write length: %i\n", length); const int MAXIMUM_WRITE_SIZE = 1 << 16; uint32 zero = 0, bytes = 0, segments = (length / MAXIMUM_WRITE_SIZE), current_count = 0, i = 0; char *out_buffer = NULL; + + if (!client ||!client->afc_packet || !client->connection || !file) return -1; + + afc_lock(client); + + if (debug) fprintf(stderr, "afc_write_file: Write length: %i\n", length); - for (i = 0; i < segments; i++) { // Essentially, yeah, divide it into segments. + // Divide the file into segments. + for (i = 0; i < segments; i++) { + // Send the segment client->afc_packet->this_length = sizeof(AFCPacket) + 8; - //client->afc_packet->entire_length = client->afc_packet->this_length + length; client->afc_packet->entire_length = client->afc_packet->this_length + MAXIMUM_WRITE_SIZE; client->afc_packet->operation = AFC_WRITE; out_buffer = (char*)malloc(sizeof(char) * client->afc_packet->entire_length - sizeof(AFCPacket)); memcpy(out_buffer, (char*)&file->filehandle, sizeof(uint32)); memcpy(out_buffer+4, (char*)&zero, sizeof(uint32)); memcpy(out_buffer+8, data+current_count, MAXIMUM_WRITE_SIZE); - bytes = dispatch_AFC_packet(client, out_buffer, MAXIMUM_WRITE_SIZE + 8); - if (bytes < 0) { afc_unlock(client); return bytes; } - free(out_buffer); out_buffer = NULL; // cleanup and hope it works + if (bytes < 0) { + afc_unlock(client); + return bytes; + } + free(out_buffer); + out_buffer = NULL; + current_count += bytes; bytes = receive_AFC_data(client, &acknowledgement); - if (bytes < 0) { afc_unlock(client); return current_count; } + if (bytes < 0) { + afc_unlock(client); + return current_count; + } } // By this point, we should be at the end. i.e. the last segment that 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 == length) { afc_unlock(client); return current_count; } + if (current_count == length) { + afc_unlock(client); + return current_count; + } + client->afc_packet->this_length = sizeof(AFCPacket) + 8; client->afc_packet->entire_length = client->afc_packet->this_length + (length - current_count); - // operation is already AFC_WRITE, but set again to be sure client->afc_packet->operation = AFC_WRITE; out_buffer = (char*)malloc(sizeof(char) * client->afc_packet->entire_length - sizeof(AFCPacket)); memcpy(out_buffer, (char*)&file->filehandle, sizeof(uint32)); memcpy(out_buffer+4, (char*)&zero, sizeof(uint32)); memcpy(out_buffer+8, data+current_count, (length - current_count)); bytes = dispatch_AFC_packet(client, out_buffer, (length - current_count) + 8); - free(out_buffer); out_buffer = NULL; + free(out_buffer); + out_buffer = NULL; + current_count += bytes; - if (bytes <= 0) { afc_unlock(client); return current_count; } + + if (bytes <= 0) { + afc_unlock(client); + return current_count; + } zero = bytes; bytes = receive_AFC_data(client, &acknowledgement); afc_unlock(client); if (bytes < 0) { - if (debug) printf("afc_write_file: uh oh?\n"); + if (debug) fprintf(stderr, "afc_write_file: uh oh?\n"); } return current_count; } +/** Closes a file on the phone. + * + * @param client The client to close the file with. + * @param file A pointer to an AFCFile struct containing the file handle of the + * file to close. + */ void afc_close_file(AFClient *client, AFCFile *file) { char *buffer = malloc(sizeof(char) * 8); uint32 zero = 0; - if (debug) printf("File handle %i\n", file->filehandle); + int bytes = 0; + afc_lock(client); + + if (debug) fprintf(stderr, "afc_close_file: File handle %i\n", file->filehandle); + + // Send command memcpy(buffer, &file->filehandle, sizeof(uint32)); memcpy(buffer+sizeof(uint32), &zero, sizeof(zero)); client->afc_packet->operation = AFC_FILE_CLOSE; - int bytes = 0; client->afc_packet->entire_length = client->afc_packet->this_length = 0; bytes = dispatch_AFC_packet(client, buffer, sizeof(char) * 8); - free(buffer); - client->afc_packet->entire_length = client->afc_packet->this_length = 0; - if (bytes <= 0) { afc_unlock(client); return; } + buffer = NULL; + + // FIXME: Is this necesary? + //client->afc_packet->entire_length = client->afc_packet->this_length = 0; + if (bytes <= 0) { + afc_unlock(client); + return; + } + + // Receive the response bytes = receive_AFC_data(client, &buffer); + if (buffer) free(buffer); + afc_unlock(client); - if (buffer) { free(buffer); } - return; } +/** Seeks to a given position of a pre-opened file on the phone. + * + * @param client The client to use to seek to the position. + * @param file The file to seek to a position on. + * @param seekpos Where to seek to. If passed a negative value, this will seek + * from the end of the file. + * + * @return 0 on success, -1 on failure. + */ + int afc_seek_file(AFClient *client, AFCFile *file, int seekpos) { - afc_lock(client); - char *buffer = (char*)malloc(sizeof(char) * 24); uint32 seekto = 0, bytes = 0, zero = 0; + if (seekpos < 0) seekpos = file->size - abs(seekpos); - seekto = seekpos; + + afc_lock(client); + // Send the command + seekto = seekpos; memcpy(buffer, &file->filehandle, sizeof(uint32)); // handle memcpy(buffer+4, &zero, sizeof(uint32)); // pad memcpy(buffer+8, &zero, sizeof(uint32)); // fromwhere @@ -578,22 +843,45 @@ int afc_seek_file(AFClient *client, AFCFile *file, int seekpos) { client->afc_packet->operation = AFC_FILE_SEEK; client->afc_packet->this_length = client->afc_packet->entire_length = 0; bytes = dispatch_AFC_packet(client, buffer, 23); - free(buffer); buffer = NULL; - if (bytes <= 0) { afc_unlock(client); return -1; } + free(buffer); + buffer = NULL; + + if (bytes <= 0) { + afc_unlock(client); + return -1; + } + // Receive response bytes = receive_AFC_data(client, &buffer); if (buffer) free(buffer); + afc_unlock(client); - if (bytes >= 0) return 0; - else return -1; + + if (bytes >= 0) { + return 0; + } else { + return -1; + } } +/** Sets the size of a file on the phone. + * + * @param client The client to use to set the file size. + * @param file The (pre-opened) file to set the size on. + * @param newsize The size to set the file to. + * + * @return 0 on success, -1 on failure. + * + * @note This function is more akin to ftruncate than truncate, and truncate + * calls would have to open the file before calling this, sadly. + */ int afc_truncate_file(AFClient *client, AFCFile *file, uint32 newsize) { - afc_lock(client); - char *buffer = (char*)malloc(sizeof(char) * 16); uint32 bytes = 0, zero = 0; + afc_lock(client); + + // Send command memcpy(buffer, &file->filehandle, sizeof(uint32)); // handle memcpy(buffer+4, &zero, sizeof(uint32)); // pad memcpy(buffer+8, &newsize, sizeof(uint32)); // newsize @@ -601,13 +889,23 @@ int afc_truncate_file(AFClient *client, AFCFile *file, uint32 newsize) { client->afc_packet->operation = AFC_FILE_TRUNCATE; client->afc_packet->this_length = client->afc_packet->entire_length = 0; bytes = dispatch_AFC_packet(client, buffer, 15); - free(buffer); buffer = NULL; - if (bytes <= 0) { afc_unlock(client); return -1; } + free(buffer); + buffer = NULL; + + if (bytes <= 0) { + afc_unlock(client); + return -1; + } + // Receive response bytes = receive_AFC_data(client, &buffer); if (buffer) free(buffer); + afc_unlock(client); - if (bytes >= 0) return 0; - else return -1; + + if (bytes >= 0) { + return 0; + } else { + return -1; + } } - |