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#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 *ret;
char str[MAXCHAR];
int found = 0; // Have we found the configuration option?
// Set strings 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);
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 (!(ret = strstr(substr, confname)) == 0) {
found = 1;
break;
}
}
// If we got here, then either we found the configuration option or we ran out of file
if (!found) {
printf("Error reading configuration option '%s', did not find it in configuration file '%s'.\n", confname, filename);
return 0;
}
long int pos;
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);
exit(1);
}
strncpy(dest, conf + 1, strlen(conf) - 2); // Copy result to destination string without quotes
dest[strlen(conf) - 2] = '\0'; // Null terminate
printf("getconfstr(): returning '%s'.\n", dest);
// Close fine and return success
fclose(fp);
return 1;
}
// Returns the value of the configuration option with name
// 'confname' from configuration file 'filename'.
int getconfint(char *confname, char *filename) {
char result[MAXCHAR];
if (!getconfstr(confname, filename, result)) {
printf("getconfint(): error getting configuration option '%s' from configuration file '%s'.\n", confname, filename);
// TODO - Do something useful here instead of exiting
exit(1);
}
return strtol(result, NULL, 10); // Convert resulting string to an integer, base 10
}
// Check the password provided in the string 'str' against what is in
// the configuration file 'filename'.
// Return 0 for password mismatch, or 1 for password match.
int checkpassword(char *password, char *filename) {
char confpassword[MAXCHAR];
if (!getconfstr("password", filename, confpassword)) {
printf("checkpassword(): error getting configuration option 'password' from configuration file '%s'.\n", filename);
return 0;
}
// Ensure passwords are the same length
if (strlen(password) != strlen(confpassword)) {
printf("Password length mismatch!\n");
return 0;
}
// Ensure passwords match
if (strncmp(password, confpassword, strlen(password)) == 0) {
printf("confpassword matches password.\n");
return 1;
} else {
printf("confpassword does NOT match password!\n");
return 0;
}
printf("checkpassword(): unexpectedly got to end of function, quitting.\n");
exit(1);
}
// 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);
exit(1);
} else {
printf("Created config directory '%s'.\n", dir);
}
}
FILE *fp;
// char line[MAXCHAR];
fp = fopen(filename, "a");
if (fp == NULL) {
printf("error: could not open default configuration file '%s' for writing.\n", filename);
exit(1);
}
// Prepare the string
char *string =
"# blabouncer configuration file\n"
"# 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"
"nick = \"blabounce\"\n"
"username = \"blabounce\"\n"
"realname = \"Mr Bla Bouncer\"\n"
"\n"
"# How many seconds of replay log should be sent to connecting clients\n"
"replayseconds = \"7200\"\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"
"# Certificate file\n"
"# If clienttls = \"0\" then this need not be set\n"
"certfile = \"cert.pem\"\n"
"\n"
"# Certificate key file\n"
"# If clienttls = \"0\" then this need not be set\n"
"keyfile = \"key.pem\"\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";
// Write complete string to file
if ((fprintf(fp, string)) < 0) {
printf("error: could not write to replay log file.\n");
exit(1);
}
fclose(fp);
return 0;
exit(1);
}
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