/**
* Get a parameter at |index| as an int.
* @param[in] params The parameter array.
* @param[in] index The index in |params| to get.
* @param[out] out_file The output int32_t.
* @param[out] out_error An error message, if this operation failed.
* @return int 0 if successful, otherwise 1.
*/
static int GetParamInt(struct PP_Var params,
uint32_t index,
int32_t* out_int,
const char** out_error) {
struct PP_Var value = g_ppb_var_array->Get(params, index);
if (value.type != PP_VARTYPE_INT32) {
*out_error =
PrintfToNewString("Expected param at index %d to be an int32", index);
return 1;
}
*out_int = value.value.as_int;
return 0;
}
/**
* Handle a call to closedir() made by JavaScript.
*
* closedir expects 1 parameter:
* 0: The index of the directory (which is mapped to a DIR*)
* on success, closedir returns a result in |output|:
* 0: "closedir"
* 1: the name of the directory
* on failure, closedir returns an error string in |out_error|.
*/
int HandleClosedir(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
#if defined(WIN32)
*out_error = PrintfToNewString("Win32 does not support closedir");
return 1;
#else
CHECK_PARAM_COUNT(closedir, 1);
PARAM_DIR(0, dir);
int result = closedir(dir);
if (result) {
*out_error = PrintfToNewString("closedir returned error %d", result);
return 1;
}
RemoveDirFromMap(dir_index);
CREATE_RESPONSE(closedir);
RESPONSE_INT(dir_index);
return 0;
#endif
}
/**
* Get a parameter at |index| as a string.
* @param[in] params The parameter array.
* @param[in] index The index in |params| to get.
* @param[out] out_string The output string.
* @param[out] out_string_len The length of the output string.
* @param[out] out_error An error message, if this operation failed.
* @return int 0 if successful, otherwise 1.
*/
static int GetParamString(struct PP_Var params,
uint32_t index,
char** out_string,
uint32_t* out_string_len,
const char** out_error) {
if (index >= MAX_PARAMS) {
*out_error = PrintfToNewString("Param index %u >= MAX_PARAMS (%d)",
index, MAX_PARAMS);
return 1;
}
struct PP_Var value = g_ppb_var_array->Get(params, index);
if (value.type != PP_VARTYPE_STRING) {
*out_error =
PrintfToNewString("Expected param at index %d to be a string not.%d", index,value.type);
return 1;
}
uint32_t length;
const char* var_str = g_ppb_var->VarToUtf8(value, &length);
char* string = (char*)malloc(length + 1);
memcpy(string, var_str, length);
string[length] = 0;
/* Put the allocated string in g_ParamStrings. This keeps us from leaking
* each parameter string, without having to do manual cleanup in every
* Handle* function below.
*/
free(g_ParamStrings[index]);
g_ParamStrings[index] = string;
*out_string = string;
*out_string_len = length;
return 0;
}
/**
* Handle a call to connect() made by JavaScript.
*
* connect expects 2 parameters:
* 0: The hostname to connect to.
* 1: The port number to connect to.
* on success, connect returns a result in |output|:
* 0: "connect"
* 1: The socket file descriptor.
* on failure, connect returns an error string in |out_error|.
*/
int HandleConnect(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
CHECK_PARAM_COUNT(connect, 2);
PARAM_STRING(0, hostname);
PARAM_INT(1, port);
// Lookup host
struct hostent* hostent = gethostbyname(hostname);
if (hostent == NULL) {
*out_error = PrintfToNewString("gethostbyname() returned error: %d", errno);
return 1;
}
struct sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
memcpy(&addr.sin_addr.s_addr, hostent->h_addr_list[0], hostent->h_length);
int sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) {
*out_error = PrintfToNewString("socket() failed: %s", strerror(errno));
return 1;
}
int result = connect(sock, (struct sockaddr*)&addr, addrlen);
if (result != 0) {
*out_error = PrintfToNewString("connect() failed: %s", strerror(errno));
close(sock);
return 1;
}
CREATE_RESPONSE(connect);
RESPONSE_INT(sock);
return 0;
}
/**
* Handle a call to fread() made by JavaScript.
*
* fread expects 2 parameters:
* 0: The index of the file (which is mapped to a FILE*)
* 1: The number of bytes to read from the file.
* on success, fread returns a result in |output| separated by \1:
* 0: "fread"
* 1: the file index
* 2: the data read from the file
* on failure, fread returns an error string in |output|.
*
* @param[in] num_params The number of params in |params|.
* @param[in] params An array of strings, parameters to this function.
* @param[out] output A string to write informational function output to.
* @return An errorcode; 0 means success, anything else is a failure. */
int HandleFread(int num_params, char** params, char** output) {
FILE* file;
const char* file_index_string;
char* buffer;
size_t data_len;
size_t bytes_read;
if (num_params != 2) {
*output = PrintfToNewString("Error: fread takes 2 parameters.");
return 1;
}
file_index_string = params[0];
file = GetFileFromIndexString(file_index_string, NULL);
data_len = strtol(params[1], NULL, 10);
if (!file) {
*output =
PrintfToNewString("Error: Unknown file handle %s.", file_index_string);
return 2;
}
buffer = (char*)malloc(data_len + 1);
bytes_read = fread(buffer, 1, data_len, file);
buffer[bytes_read] = 0;
if (ferror(file)) {
*output = PrintfToNewString(
"Error: Read %d bytes, but ferror() returns true.", bytes_read);
return 3;
}
*output = PrintfToNewString("fread\1%s\1%s", file_index_string, buffer);
free(buffer);
return 0;
}
/**
* Append a PP_Var to the response dictionary.
* @param[in,out] response_var The response PP_var.
* @param[in] value The value to add to the response args.
* @param[out] out_error An error message, if this call failed.
*/
static void AppendResponseVar(struct PP_Var* response_var,
struct PP_Var value,
const char** out_error) {
struct PP_Var args_value = GetDictVar(*response_var, "args");
uint32_t args_length = g_ppb_var_array->GetLength(args_value);
PP_Bool result = g_ppb_var_array->Set(args_value, args_length, value);
if (!result) {
// Release the dictionary that was there before.
g_ppb_var->Release(*response_var);
// Return an error message instead.
*response_var = PP_MakeUndefined();
*out_error = PrintfToNewString("Unable to append value to result");
return;
}
}
/**
* Handle a call to getcwd() made by JavaScript.
*
* getcwd expects 0 parameters.
* on success, getcwd returns a result in |output|:
* 0: "getcwd"
* 1: the current working directory
* on failure, getcwd returns an error string in |out_error|.
*/
int HandleGetcwd(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
CHECK_PARAM_COUNT(getcwd, 0);
char cwd[PATH_MAX];
char* result = getcwd(cwd, PATH_MAX);
if (result == NULL) {
*out_error = PrintfToNewString("getcwd returned error: %d", errno);
return 1;
}
CREATE_RESPONSE(getcwd);
RESPONSE_STRING(cwd);
return 0;
}
/**
* Handle a call to close() made by JavaScript.
*
* close expects 1 parameters:
* 0: The socket file descriptor to close.
* on success, close returns a result in |output|:
* 0: "close"
* 1: The socket file descriptor closed.
* on failure, close returns an error string in |out_error|.
*/
int HandleClose(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
CHECK_PARAM_COUNT(close, 1);
PARAM_INT(0, sock);
int result = close(sock);
if (result != 0) {
*out_error = PrintfToNewString("close returned error: %d", errno);
return 1;
}
CREATE_RESPONSE(close);
RESPONSE_INT(sock);
return 0;
}
/**
* Handle a call to chdir() made by JavaScript.
*
* chdir expects 1 parameter:
* 0: The name of the directory
* on success, chdir returns a result in |output|:
* 0: "chdir"
* 1: the name of the directory
* on failure, chdir returns an error string in |out_error|.
*/
int HandleChdir(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
CHECK_PARAM_COUNT(chdir, 1);
PARAM_STRING(0, dirname);
int result = chdir(dirname);
if (result != 0) {
*out_error = PrintfToNewString("chdir returned error: %d", errno);
return 1;
}
CREATE_RESPONSE(chdir);
RESPONSE_STRING(dirname);
return 0;
}
/**
* Handle a call to send() made by JavaScript.
*
* send expects 2 parameters:
* 0: The socket file descriptor to send using.
* 1: The NULL terminated string to send.
* on success, send returns a result in |output|:
* 0: "send"
* 1: The number of bytes sent.
* on failure, send returns an error string in |out_error|.
*/
int HandleSend(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
CHECK_PARAM_COUNT(send, 2);
PARAM_INT(0, sock);
PARAM_STRING(1, buffer);
int result = (int32_t)send(sock, buffer, strlen(buffer), 0);
if (result <= 0) {
*out_error = PrintfToNewString("send failed: %s", strerror(errno));
return 1;
}
CREATE_RESPONSE(send);
RESPONSE_INT(result);
return 0;
}
/**
* Handle a call to fclose() made by JavaScript.
*
* fclose expects 1 parameter:
* 0: The index of the file (which is mapped to a FILE*)
* on success, fclose returns a result in |output|:
* 0: "fclose"
* 1: the file index
* on failure, fclose returns an error string in |out_error|.
*/
int HandleFclose(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
CHECK_PARAM_COUNT(fclose, 1);
PARAM_FILE(0, file);
int result = fclose(file);
if (result) {
*out_error = PrintfToNewString("fclose returned error %d", result);
return 1;
}
RemoveFileFromMap(file_index);
CREATE_RESPONSE(fclose);
RESPONSE_INT(file_index);
return 0;
}
/**
* Handle a call to fwrite() made by JavaScript.
*
* fwrite expects 2 parameters:
* 0: The index of the file (which is mapped to a FILE*)
* 1: A string to write to the file
* on success, fwrite returns a result in |output|:
* 0: "fwrite"
* 1: the file index
* 2: the number of bytes written
* on failure, fwrite returns an error string in |out_error|.
*/
int HandleFwrite(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
CHECK_PARAM_COUNT(fwrite, 2);
PARAM_FILE(0, file);
PARAM_STRING(1, data);
size_t bytes_written = fwrite(data, 1, data_len, file);
if (ferror(file)) {
*out_error = PrintfToNewString(
"Wrote %" PRIuS " bytes, but ferror() returns true", bytes_written);
return 1;
}
CREATE_RESPONSE(fwrite);
RESPONSE_INT(file_index);
RESPONSE_INT((int32_t)bytes_written);
return 0;
}
/**
* Handle a call to stat() made by JavaScript.
*
* stat expects 1 parameter:
* 0: The name of the file
* on success, stat returns a result in |output|:
* 0: "stat"
* 1: the file name
* 2: the size of the file
* on failure, stat returns an error string in |out_error|.
*/
int HandleStat(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
CHECK_PARAM_COUNT(stat, 1);
PARAM_STRING(0, filename);
struct stat buf;
memset(&buf, 0, sizeof(buf));
int result = stat(filename, &buf);
if (result == -1) {
*out_error = PrintfToNewString("stat returned error %d", errno);
return 1;
}
CREATE_RESPONSE(stat);
RESPONSE_STRING(filename);
RESPONSE_INT((int32_t)buf.st_size);
return 0;
}
/**
* Handle a call to readdir() made by JavaScript.
*
* readdir expects 1 parameter:
* 0: The index of the directory (which is mapped to a DIR*)
* on success, opendir returns a result in |output|:
* 0: "readdir"
* 1: the inode number of the entry
* 2: the name of the entry
* if there are no more entries, |output| contains:
* 0: "readdir"
* on failure, readdir returns an error string in |out_error|.
*/
int HandleReaddir(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
#if defined(WIN32)
*out_error = PrintfToNewString("Win32 does not support readdir");
return 1;
#else
CHECK_PARAM_COUNT(readdir, 1);
PARAM_DIR(0, dir);
struct dirent* entry = readdir(dir);
CREATE_RESPONSE(readdir);
RESPONSE_INT(dir_index);
if (entry != NULL) {
RESPONSE_INT((int32_t)entry->d_ino);
RESPONSE_STRING(entry->d_name);
}
return 0;
#endif
}
/**
* Handle a call to fread() made by JavaScript.
*
* fread expects 2 parameters:
* 0: The index of the file (which is mapped to a FILE*)
* 1: The number of bytes to read from the file.
* on success, fread returns a result in |output|:
* 0: "fread"
* 1: the file index
* 2: the data read from the file
* on failure, fread returns an error string in |out_error|.
*/
int HandleFread(struct PP_Var params,
struct PP_Var* output,
const char** out_error) {
CHECK_PARAM_COUNT(fread, 2);
PARAM_FILE(0, file);
PARAM_INT(1, data_len);
char* buffer = (char*)malloc(data_len + 1);
size_t bytes_read = fread(buffer, 1, data_len, file);
buffer[bytes_read] = 0;
if (ferror(file)) {
*out_error = PrintfToNewString(
"Read %" PRIuS " bytes, but ferror() returns true", bytes_read);
free(buffer);
return 1;
}
CREATE_RESPONSE(fread);
RESPONSE_INT(file_index);
RESPONSE_STRING(buffer);
free(buffer);
return 0;
}
