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/*
* This file is part of blabouncer (https://www.blatech.co.uk/l_bratch/blabouncer).
* Copyright (C) 2019 Luke Bratch <luke@bratch.co.uk>.
*
* Blabouncer is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* Blabouncer is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with blabouncer. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
// Sets 'dest' to the value of the configuration option with name
// 'confname' from configuration file 'filename'.
// Returns 1 for success or 0 for error/failure.
int getconfstr(char *confname, char *filename, char* dest) {
FILE *fp;
char str[MAXCHAR];
int found = 0; // Have we found the configuration option?
// Set string to zero-length to begin
dest[0] = '\0';
// Length of requested configuration option name
long int namelen = strlen(confname);
fp = fopen(filename, "r");
if (fp == NULL) {
printf("error: could not open configuration file '%s'.\n", filename);
debugprint(DEBUG_CRIT, "error: could not open configuration file '%s'.\n", filename);
exit(1);
}
// Loop through the whole file, looking for the requested configuration option
while (fgets(str, MAXCHAR, fp) != NULL) {
char substr[MAXCHAR];
// Check if the next character after the length of the requested option
// name is an equals sign, a space, or a tab
if (str[namelen] != '=' && str[namelen] != ' ' && str[namelen] != '\t') {
// If it isn't this can't have been our option
continue;
}
// Copy the number of characters that the requested option name is long
// to a temporary string
strncpy(substr, str, namelen);
substr[namelen] = '\0';
// If the resulting temporary string contains the requested option name,
// we have found our configuration option and it is in the current 'str'
if (strstr(substr, confname)) {
found = 1;
break;
}
}
// If we got here, then either we found the configuration option or we ran out of file
if (!found) {
debugprint(DEBUG_SOME, "Error reading configuration option '%s', did not find it in configuration file '%s'.\n", confname, filename);
fclose(fp);
return 0;
}
long int pos = 0;
char conf[MAXCHAR]; // Temporary string to build configuration value in
// Starting from the end of the option name, find the position of the start of the configuration value
// (including its double quotes) by skipping over everything that isn't an equals sign, a space, or a tab
for (size_t i = namelen; i < strlen(str); i++) {
if (str[i] == '=' || str[i] == ' ' || str[i] == '\t') {
continue;
} else {
// Record current/final position in string
pos = i;
break;
}
}
strncpy(conf, str + pos, strlen(str) - pos - 1); // Copy remainder to new string and lop off the newline
conf[strlen(str) - pos - 1] = '\0'; // Null terminate
// Check for start and end quotes
if (conf[0] != '"' || conf[strlen(conf) - 1] != '"') {
printf("Error reading configuration option '%s', not enclosed in double quotes in configuration file '%s'!\n", confname, filename);
debugprint(DEBUG_CRIT, "Error reading configuration option '%s', not enclosed in double quotes in configuration file '%s'!\n", confname, filename);
exit(1);
}
strncpy(dest, conf + 1, strlen(conf) - 2); // Copy result to destination string without quotes
dest[strlen(conf) - 2] = '\0'; // Null terminate
debugprint(DEBUG_FULL, "getconfstr(): returning '%s'.\n", dest);
// Close file and return success
fclose(fp);
return 1;
}
// Populates 'dest' with the values of the configuration array option
// with name 'confname' from configuration file 'filename'.
// Returns 1 on success, 0 on reading no values, or -1 on an error.
// On error, dest[0] is set to the error string for later retrieval.
int getconfarr(char *confname, char *filename, char dest[MAXCONFARR][MAXDATASIZE]) {
debugprint(DEBUG_FULL, "getconfarr(): '%s', '%s' and a dest array.\n", confname, filename);
FILE *fp;
char line[MAXCHAR];
int found = 0; // Have we found the configuration option?
int valuecount = 0; // Which element in the configuration array we are on
// Set strings to zero-length to begin
for (int i = 0; i < MAXCONFARR; i++) {
dest[i][0] = '\0';
}
// Length of requested configuration array name
long int namelen = strlen(confname);
fp = fopen(filename, "r");
if (fp == NULL) {
debugprint(DEBUG_CRIT, "error: could not open configuration file '%s'.\n", filename);
exit(1);
}
// Loop through the whole file, looking for the requested configuration array
while (fgets(line, MAXCHAR, fp) != NULL) {
// Don't bother with any of this if this line is a comment
int comment = 0;
for (size_t i = 0; i < strlen(line); i++) {
// Ignore spaces/tabs
if (line[i] == ' ' || line[i] == '\t') {
continue;
} else if (line[i] == '#') {
// If it's a comment, ignore the line
comment = 1;
break;
} else {
// Found something else before a comment, so carry on
break;
}
}
if (comment) {
continue;
}
// If we haven't found our array yet, try to find the opening line
if (!found) {
char substr[MAXCHAR];
// Check if the next character after the length of the requested array
// name is an equals sign, a space, or a tab
if (line[namelen] != '=' && line[namelen] != ' ' && line[namelen] != '\t') {
// If it isn't this can't have been our array
continue;
}
// Copy the number of characters that the requested array name is long
// to a temporary string
strncpy(substr, line, namelen);
substr[namelen] = '\0';
// If the resulting temporary string contains the requested array name,
// we have found our configuration array
if (strstr(substr, confname)) {
// Make sure it is a valid start of array line
for (size_t i = namelen; i < strlen(line); i++) {
if (line[i] == ' ' || line[i] == '\t' || line[i] == '=') {
// Ignore spaces, tabs and equals signs
continue;
} else if (line[i] == '{') {
// Success, found an opening brace
// Ignore anything else on this line
found = 1;
break;
} else {
// Unexpected character found, return failure
snprintf(dest[0], MAXDATASIZE, "Unexpected character '%c' found on configuration array opening line for '%s'.\n", line[i], confname);
fclose(fp);
return -1;
}
}
}
// If we have found our array, extract the value from each line in it
} else {
int valuelen = 0;
int inquotes = 0;
for (size_t i = 0; i < strlen(line); i++) {
// If we've on the closing brace line, then we're done
if (line[i] == '}') {
for (int i = 0; i < valuecount; i++) {
debugprint(DEBUG_FULL, "getconfarr(): returning '%s'.\n", dest[i]);
}
// Close file and return success (or 0 if no values found in an otherwise valid array)
fclose(fp);
if (valuecount) {
return 1;
} else {
return 0;
}
}
// If not in the quotes yet
if (!inquotes) {
// Skip over initial spaces and tabs
if (line[i] == ' ' || line[i] == '\t') {
continue;
} else if (line[i] == '"') {
// Quotes found, we're now reading the value
inquotes = 1;
continue;
} else {
// Unexpected character found, return failure
snprintf(dest[0], MAXDATASIZE, "Unexpected character '%c' found before opening quotes on array line for '%s'.\n", line[i], confname);
fclose(fp);
return -1;
}
// If inside the quotes (so, we've got to the actual value)
} else if (inquotes) {
// If we're on the last character and it isn't a closing quote, something is wrong
if (i == strlen(line) - 1 && line[i] != '"') {
snprintf(dest[0], MAXDATASIZE, "Reached end of line without finding closing quotes on array line for '%s'.\n", confname);
fclose(fp);
return -1;
}
// If we've found too many values, return an error
if (valuecount > MAXCONFARR - 1) {
snprintf(dest[0], MAXDATASIZE, "Too many elements defined for configuration array '%s', maximum number is '%d'.\n", confname, MAXCONFARR);
fclose(fp);
return -1;
}
// Otherwise, copy everything that isn't the closing quotes to the current element in the dest array
if (line[i] != '"') {
dest[valuecount][valuelen] = line[i];
valuelen++;
continue;
} else {
// When we find the closing quotes, the value is read, so terminate the dest array element string
dest[valuecount][valuelen] = '\0';
// We're done with this value, ignore anything that may be after the closing quotes on this line
valuecount++;
break;
}
}
}
}
}
// If we get this far, then something went wrong
snprintf(dest[0], MAXDATASIZE, "getconfarr(): didn't find any configuration array for '%s'.\n", confname);
fclose(fp);
return 0;
}
// Returns the value of the configuration option with name
// 'confname' from configuration file 'filename'.
// Sets errno to 0 on success, or ECONFINT if it fails, in which case the return value is undefined.
int getconfint(char *confname, char *filename) {
errno = 0;
char result[MAXCHAR];
if (!getconfstr(confname, filename, result)) {
debugprint(DEBUG_CRIT, "getconfint(): error getting configuration option '%s' from configuration file '%s'.\n", confname, filename);
errno = ECONFINT;
}
return strtol(result, NULL, 10); // Convert resulting string to an integer, base 10
}
// Create the default configuration file.
// Return 1 on success, 0 on failure.
int createconfigfile(char *filename) {
char *dirtmp;
char *dir;
dirtmp = strdup(filename);
dir = strdup(dirname(dirtmp));
// Make sure the parent directory exists
struct stat st = {0};
if (stat(dir, &st) == -1) {
if (mkdir(dir, 0700)) {
printf("Error creating config directory '%s'.\n", dir);
debugprint(DEBUG_CRIT, "Error creating config directory '%s'.\n", dir);
exit(1);
} else {
printf("Created config directory '%s'.\n", dir);
}
}
FILE *fp;
fp = fopen(filename, "a");
if (fp == NULL) {
printf("error: could not open default configuration file '%s' for writing.\n", filename);
debugprint(DEBUG_CRIT, "error: could not open default configuration file '%s' for writing.\n", filename);
exit(1);
}
// Prepare the string
char *string =
"# blabouncer configuration file\n"
"#\n"
"# Normal entries must be in the form:\n"
"# option name, space, equals sign, space, double quote, option value, double quote\n"
"# e.g.\n"
"# realname = \"Mr Bla Bouncer\"\n"
"#\n"
"# Array entries must be in the form:\n"
"# option name, space, equals sign, space, open brace\n"
"# (optional indentation,) double quote, element value, double quoute\n"
"# (optional multiple values to be repeated after the first one(s))\n"
"# close brace\n"
"# e.g.\n"
"# connectcommands = {\n"
"# \"PRIVMSG NickServ IDENTIFY bananas\"\n"
"# \"PRIVMSG myfriend I'm online!\"\n"
"# }\n"
"#\n"
"# Shell expansion is not supported, so do not try and specify e.g.\n"
"# \"~/.blabouncer/\" or \"$HOME/.blabouncer/\", instead use \"/home/foo/.blabouncer\"\n"
"#\n"
"# Some settings can be reloaded at runtime, please refer to README for details.\n"
"\n"
"# Nick(s) to use when connecting - will be cycled through in order in the event of\n"
"# a nick being in use or invalid\n"
"nicks = {\n"
" \"blabounce\"\n"
" \"bbounce2\"\n"
" \"bbounce3\"\n"
"}\n"
"\n"
"username = \"bounceusr\"\n"
"realname = \"Mr Bla Bouncer\"\n"
"\n"
"# Channels to automatically join (defaults to none)\n"
"# Put channel keys/passwords after channel names (separated with a space)\n"
"channels = {\n"
" \"#blabouncer keyword\"\n"
" \"#test\"\n"
"}\n"
"\n"
"# Auto replay mode upon a bouncer client connecting\n"
"# \"none\" = Don't auto replay\n"
"# \"time\" = Always send the last \"replayseconds\" worth of logs\n"
"# \"lastspoke\" = All messages since your current nick last spoke\n"
"# \"noclients\" = All messages since you last had no clients connected\n"
"# \"lastchange\" = All messages since your last client connection/disconnection\n"
"# \"perclient\" = All messages since the current client last disconnected (see README)\n"
"replaymode = \"time\"\n"
"\n"
"# How many seconds of replay log should be sent to connecting clients if replaymode = \"time\"\n"
"replayseconds = \"600\"\n"
"\n"
"# Should replay log timestamps include the date when replaying? (\"1\" for yes or \"0\" for no)\n"
"replaydates = \"0\"\n"
"\n"
"# Connect password clients must provided to connect\n"
"password = \"bananas\"\n"
"\n"
"# Port the bouncer should listen on\n"
"clientport = \"1234\"\n"
"\n"
"# Enable TLS for clients connecting to the bouncer (\"1\" for yes or \"0\" for no)\n"
"# If \"0\" then certfile and keyfile need not be set\n"
"clienttls = \"1\"\n"
"\n"
"# Enable TLS for the bouncer connecting to the IRC server (\"1\" for yes or \"0\" for no)\n"
"servertls = \"1\"\n"
"\n"
"# Real IRC server the bouncer connects to\n"
"ircserver = \"irc.blatech.net\"\n"
"\n"
"# Real IRC server port\n"
"ircserverport = \"6697\"\n"
"\n"
"# Real IRC server password\n"
"#ircserverpassword = \"apples\"\n"
"\n"
"# Command(s) to send to the server upon completing registration (e.g. a NickServ password)\n"
"#connectcommands = {\n"
"# \"PRIVMSG NickServ IDENTIFY bananas\"\n"
"# \"PRIVMSG myfriend I'm online!\"\n"
"#}\n"
"\n"
"# Base directory (defaults to $HOME/.blabouncer/)\n"
"# Things such as the logs directory will be placed below this\n"
"#basedir = \"/home/foo/.blabouncer/\"\n"
"\n"
"# Certificate file (defaults to <basedir>/cert.pem)\n"
"# If clienttls = \"0\" then this need not be set\n"
"#certfile = \"/home/foo/.blabouncer/cert.pem\"\n"
"\n"
"# Certificate key file (defaults to <basedir>/key.pem)\n"
"# If clienttls = \"0\" then this need not be set\n"
"#keyfile = \"/home/foo/.blabouncer/key.pem\"\n"
"\n"
"# Enable logging (\"1\" for yes or \"0\" for no)\n"
"# Logs go to basedir/logs/ with one file per channel/nick\n"
"logging = \"1\"\n"
"\n"
"# Enable replay logging (\"1\" for yes or \"0\" for no)\n"
"# Replay log goes to basedir/replay.log\n"
"replaylogging = \"1\"\n"
"\n"
"# Debug verbosity (\"0\" for critical only, \"1\" for some extra info, \"2\" for full debug mode)\n"
"# (All output goes to <basedir>/debug.txt)\n"
"debug = \"2\"\n"
"\n"
"# Number of debug logs to keep\n"
"debugkeep = \"5\"\n";
// Write complete string to file
if ((fprintf(fp, "%s", string)) < 0) {
debugprint(DEBUG_CRIT, "error: could not write to replay log file.\n");
}
fclose(fp);
free(dirtmp);
free(dir);
return 0;
}
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