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magicka/main.c
2016-08-06 21:57:12 +10:00

623 lines
18 KiB
C

#include <stdio.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <signal.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <arpa/inet.h>
#include <libssh/libssh.h>
#include <string.h>
#include "bbs.h"
#include "inih/ini.h"
extern struct bbs_config conf;
extern struct user_record *gUser;
void sigterm_handler(int s)
{
remove(conf.pid_file);
exit(0);
}
void sigchld_handler(int s)
{
// waitpid() might overwrite errno, so we save and restore it:
int saved_errno = errno;
while(waitpid(-1, NULL, WNOHANG) > 0);
errno = saved_errno;
}
static int door_config_handler(void* user, const char* section, const char* name,
const char* value)
{
struct bbs_config *conf = (struct bbs_config *)user;
int i;
for (i=0;i<conf->door_count;i++) {
if (strcasecmp(conf->doors[i]->name, section) == 0) {
// found it
if (strcasecmp(name, "key") == 0) {
conf->doors[i]->key = value[0];
} else if (strcasecmp(name, "command") == 0) {
conf->doors[i]->command = strdup(value);
} else if (strcasecmp(name, "stdio") == 0) {
if (strcasecmp(value, "true") == 0) {
conf->doors[i]->stdio = 1;
} else {
conf->doors[i]->stdio = 0;
}
}
return 1;
}
}
if (conf->door_count == 0) {
conf->doors = (struct door_config **)malloc(sizeof(struct door_config *));
} else {
conf->doors = (struct door_config **)realloc(conf->doors, sizeof(struct door_config *) * (conf->door_count + 1));
}
conf->doors[conf->door_count] = (struct door_config *)malloc(sizeof(struct door_config));
conf->doors[conf->door_count]->name = strdup(section);
if (strcasecmp(name, "key") == 0) {
conf->doors[conf->door_count]->key = value[0];
} else if (strcasecmp(name, "command") == 0) {
conf->doors[conf->door_count]->command = strdup(value);
} else if (strcasecmp(name, "stdio") == 0) {
if (strcasecmp(value, "true") == 0) {
conf->doors[conf->door_count]->stdio = 1;
} else {
conf->doors[conf->door_count]->stdio = 0;
}
}
conf->door_count++;
return 1;
}
static int file_sub_handler(void* user, const char* section, const char* name,
const char* value)
{
struct file_directory *fd = (struct file_directory *)user;
int i;
if (strcasecmp(section, "main") == 0) {
if (strcasecmp(name, "visible sec level")) {
fd->sec_level = atoi(value);
}
} else {
// check if it's partially filled in
for (i=0;i<fd->file_sub_count;i++) {
if (strcasecmp(fd->file_subs[i]->name, section) == 0) {
if (strcasecmp(name, "upload sec level") == 0) {
fd->file_subs[i]->upload_sec_level = atoi(value);
} else if (strcasecmp(name, "download sec level") == 0) {
fd->file_subs[i]->download_sec_level = atoi(value);
} else if (strcasecmp(name, "database") == 0) {
fd->file_subs[i]->database = strdup(value);
} else if (strcasecmp(name, "upload path") == 0) {
fd->file_subs[i]->upload_path = strdup(value);
}
return 1;
}
}
if (fd->file_sub_count == 0) {
fd->file_subs = (struct file_sub **)malloc(sizeof(struct file_sub *));
} else {
fd->file_subs = (struct file_sub **)realloc(fd->file_subs, sizeof(struct file_sub *) * (fd->file_sub_count + 1));
}
fd->file_subs[fd->file_sub_count] = (struct file_sub *)malloc(sizeof(struct file_sub));
fd->file_subs[fd->file_sub_count]->name = strdup(section);
if (strcasecmp(name, "upload sec level") == 0) {
fd->file_subs[fd->file_sub_count]->upload_sec_level = atoi(value);
} else if (strcasecmp(name, "download sec level") == 0) {
fd->file_subs[fd->file_sub_count]->download_sec_level = atoi(value);
} else if (strcasecmp(name, "database") == 0) {
fd->file_subs[fd->file_sub_count]->database = strdup(value);
} else if (strcasecmp(name, "upload path") == 0) {
fd->file_subs[fd->file_sub_count]->upload_path = strdup(value);
}
fd->file_sub_count++;
}
return 1;
}
static int mail_area_handler(void* user, const char* section, const char* name,
const char* value)
{
struct mail_conference *mc = (struct mail_conference *)user;
int i;
if (strcasecmp(section, "main") == 0) {
if (strcasecmp(name, "visible sec level") == 0) {
mc->sec_level = atoi(value);
} else if (strcasecmp(name, "networked") == 0) {
if (strcasecmp(value, "true") == 0) {
mc->networked = 1;
} else {
mc->networked = 0;
}
} else if (strcasecmp(name, "real names") == 0) {
if (strcasecmp(value, "true") == 0) {
mc->realnames = 1;
} else {
mc->realnames = 0;
}
} else if (strcasecmp(name, "tagline") == 0) {
mc->tagline = strdup(value);
}
} else if (strcasecmp(section, "network") == 0) {
if (strcasecmp(name, "type") == 0) {
if (strcasecmp(value, "fido") == 0) {
mc->nettype = NETWORK_FIDO;
} else if (strcasecmp(value, "wwiv") == 0) {
mc->nettype = NETWORK_WWIV;
}
} else if (strcasecmp(name, "fido node") == 0) {
mc->fidoaddr = parse_fido_addr(value);
} else if (strcasecmp(name, "wwiv node") == 0) {
mc->wwivnode = atoi(value);
}
} else {
// check if it's partially filled in
for (i=0;i<mc->mail_area_count;i++) {
if (strcasecmp(mc->mail_areas[i]->name, section) == 0) {
if (strcasecmp(name, "read sec level") == 0) {
mc->mail_areas[i]->read_sec_level = atoi(value);
} else if (strcasecmp(name, "write sec level") == 0) {
mc->mail_areas[i]->write_sec_level = atoi(value);
} else if (strcasecmp(name, "path") == 0) {
mc->mail_areas[i]->path = strdup(value);
} else if (strcasecmp(name, "type") == 0) {
if (strcasecmp(value, "local") == 0) {
mc->mail_areas[i]->type = TYPE_LOCAL_AREA;
} else if (strcasecmp(value, "echo") == 0) {
mc->mail_areas[i]->type = TYPE_ECHOMAIL_AREA;
} else if (strcasecmp(value, "netmail") == 0) {
mc->mail_areas[i]->type = TYPE_NETMAIL_AREA;
}
}
return 1;
}
}
if (mc->mail_area_count == 0) {
mc->mail_areas = (struct mail_area **)malloc(sizeof(struct mail_area *));
} else {
mc->mail_areas = (struct mail_area **)realloc(mc->mail_areas, sizeof(struct mail_area *) * (mc->mail_area_count + 1));
}
mc->mail_areas[mc->mail_area_count] = (struct mail_area *)malloc(sizeof(struct mail_area));
mc->mail_areas[mc->mail_area_count]->name = strdup(section);
if (strcasecmp(name, "read sec level") == 0) {
mc->mail_areas[mc->mail_area_count]->read_sec_level = atoi(value);
} else if (strcasecmp(name, "write sec level") == 0) {
mc->mail_areas[mc->mail_area_count]->write_sec_level = atoi(value);
} else if (strcasecmp(name, "path") == 0) {
mc->mail_areas[mc->mail_area_count]->path = strdup(value);
} else if (strcasecmp(name, "type") == 0) {
if (strcasecmp(value, "local") == 0) {
mc->mail_areas[mc->mail_area_count]->type = TYPE_LOCAL_AREA;
} else if (strcasecmp(value, "echo") == 0) {
mc->mail_areas[mc->mail_area_count]->type = TYPE_ECHOMAIL_AREA;
} else if (strcasecmp(value, "netmail") == 0) {
mc->mail_areas[mc->mail_area_count]->type = TYPE_NETMAIL_AREA;
}
}
mc->mail_area_count++;
}
return 1;
}
static int handler(void* user, const char* section, const char* name,
const char* value)
{
struct bbs_config *conf = (struct bbs_config *)user;
if (strcasecmp(section, "main") == 0) {
if (strcasecmp(name, "bbs name") == 0) {
conf->bbs_name = strdup(value);
} else if (strcasecmp(name, "telnet port") == 0) {
conf->telnet_port = atoi(value);
} else if (strcasecmp(name, "enable ssh") == 0) {
if (strcasecmp(value, "true") == 0) {
conf->ssh_server = 1;
} else {
conf->ssh_server = 0;
}
} else if (strcasecmp(name, "ssh port") == 0) {
conf->ssh_port = atoi(value);
} else if (strcasecmp(name, "ssh dsa key") == 0) {
conf->ssh_dsa_key = strdup(value);
} else if (strcasecmp(name, "ssh rsa key") == 0) {
conf->ssh_rsa_key = strdup(value);
} else if (strcasecmp(name, "sysop name") == 0) {
conf->sysop_name = strdup(value);
} else if (strcasecmp(name, "nodes") == 0) {
conf->nodes = atoi(value);
} else if (strcasecmp(name, "new user level") == 0) {
conf->newuserlvl = atoi(value);
} else if (strcasecmp(name, "irc server") == 0) {
conf->irc_server = strdup(value);
} else if (strcasecmp(name, "irc port") == 0) {
conf->irc_port = atoi(value);
} else if (strcasecmp(name, "irc channel") == 0) {
conf->irc_channel = strdup(value);
} else if (strcasecmp(name, "default tagline") == 0) {
conf->default_tagline = strdup(value);
} else if (strcasecmp(name, "external editor cmd") == 0) {
conf->external_editor_cmd = strdup(value);
} else if (strcasecmp(name, "external editor stdio") == 0) {
if (strcasecmp(value, "true") == 0) {
conf->external_editor_stdio = 1;
} else {
conf->external_editor_stdio = 0;
}
} else if (strcasecmp(name, "automessage write level") == 0) {
conf->automsgwritelvl = atoi(value);
} else if (strcasecmp(name, "fork") == 0) {
if (strcasecmp(value, "true") == 0) {
conf->fork = 1;
} else {
conf->fork = 0;
}
}
} else if (strcasecmp(section, "paths") == 0){
if (strcasecmp(name, "ansi path") == 0) {
conf->ansi_path = strdup(value);
} else if (strcasecmp(name, "bbs path") == 0) {
conf->bbs_path = strdup(value);
} else if (strcasecmp(name, "log path") == 0) {
conf->log_path = strdup(value);
} else if (strcasecmp(name, "script path") == 0) {
conf->script_path = strdup(value);
} else if (strcasecmp(name, "echomail semaphore") == 0) {
conf->echomail_sem = strdup(value);
} else if (strcasecmp(name, "netmail semaphore") == 0) {
conf->netmail_sem = strdup(value);
} else if (strcasecmp(name, "pid file") == 0) {
conf->pid_file = strdup(value);
}
} else if (strcasecmp(section, "mail conferences") == 0) {
if (conf->mail_conference_count == 0) {
conf->mail_conferences = (struct mail_conference **)malloc(sizeof(struct mail_conference *));
} else {
conf->mail_conferences = (struct mail_conference **)realloc(conf->mail_conferences, sizeof(struct mail_conference *) * (conf->mail_conference_count + 1));
}
conf->mail_conferences[conf->mail_conference_count] = (struct mail_conference *)malloc(sizeof(struct mail_conference));
conf->mail_conferences[conf->mail_conference_count]->name = strdup(name);
conf->mail_conferences[conf->mail_conference_count]->path = strdup(value);
conf->mail_conferences[conf->mail_conference_count]->tagline = NULL;
conf->mail_conferences[conf->mail_conference_count]->mail_area_count = 0;
conf->mail_conferences[conf->mail_conference_count]->nettype = 0;
conf->mail_conference_count++;
} else if (strcasecmp(section, "file directories") == 0) {
if (conf->file_directory_count == 0) {
conf->file_directories = (struct file_directory **)malloc(sizeof(struct file_directory *));
} else {
conf->file_directories = (struct file_directory **)realloc(conf->file_directories, sizeof(struct file_directory *) * (conf->file_directory_count + 1));
}
conf->file_directories[conf->file_directory_count] = (struct file_directory *)malloc(sizeof(struct file_directory));
conf->file_directories[conf->file_directory_count]->name = strdup(name);
conf->file_directories[conf->file_directory_count]->path = strdup(value);
conf->file_directories[conf->file_directory_count]->file_sub_count = 0;
conf->file_directory_count++;
} else if (strcasecmp(section, "text files") == 0) {
if (conf->text_file_count == 0) {
conf->text_files = (struct text_file **)malloc(sizeof(struct text_file *));
} else {
conf->text_files = (struct text_file **)realloc(conf->text_files, sizeof(struct text_file *) * (conf->text_file_count + 1));
}
conf->text_files[conf->text_file_count] = (struct text_file *)malloc(sizeof(struct text_file));
conf->text_files[conf->text_file_count]->name = strdup(name);
conf->text_files[conf->text_file_count]->path = strdup(value);
conf->text_file_count++;
}
return 1;
}
int ssh_authenticate(ssh_session p_ssh_session) {
ssh_message message;
char *username;
char *password;
do {
msg = ssh_message_get(p_ssh_session);
switch(ssh_message_type(message)) {
case SSH_REQUEST_AUTH:
switch(ssh_message_subtype(message)) {
case SSH_AUTH_METHOD_PASSWORD:
username = ssh_message_auth_user(message);
password = ssh_message_auth_password(message);
if (strcasecmp(username, "new") == 0 && strcasecmp(password, "new") == 0) {
ssh_message_free(message);
gUser = NULL;
return 1;
}
gUser = check_user_pass(username, password);
if (gUser != NULL) {
ssh_message_free(message);
return 1;
}
ssh_message_auth_set_methods(message, SSH_AUTH_METHOD_PASSWORD | SSH_AUTH_METHOD_INTERACTIVE);
ssh_message_reply_default(message);
break;
case SSH_AUTH_METHOD_NONE:
default:
ssh_message_auth_set_methods(message, SSH_AUTH_METHOD_PASSWORD | SSH_AUTH_METHOD_INTERACTIVE);
ssh_message_reply_default(message);
break;
}
break;
default:
ssh_message_auth_set_methods(message, SSH_AUTH_METHOD_PASSWORD | SSH_AUTH_METHOD_INTERACTIVE);
ssh_message_reply_default(message);
break;
}
ssh_message_free(message);
} while(1);
}
void serverssh(int port) {
ssh_session p_ssh_session;
ssh_bind p_ssh_bind;
int err;
int pid;
ssh_channel chan = 0;
err = ssh_init();
if (err == -1) {
fprintf(stderr, "Error starting SSH server.\n");
exit(-1);
}
p_ssh_session = ssh_new();
if (p_ssh_session == NULL) {
fprintf(stderr, "Error starting SSH server.\n");
exit(-1);
}
p_ssh_bind = ssh_bind_new();
if (p_ssh_bind == NULL) {
fprintf(stderr, "Error starting SSH server.\n");
exit(-1)
}
ssh_bind_options_set(pSshBind, SSH_BIND_OPTIONS_BINDPORT, &port);
ssh_bind_options_set(pSshBind, SSH_BIND_OPTIONS_DSAKEY, conf.ssh_dsa_key);
ssh_bind_options_set(pSshBind, SSH_BIND_OPTIONS_RSAKEY, conf.ssh_rsa_key);
ssh_bind_listen(p_ssh_bind);
while (1) {
if (ssh_bind_accept(p_ssh_bind, p_ssh_session) == SSH_OK) {
pid = fork();
if (pid == 0) {
if (ssh_handle_key_exchange(p_ssh_session)) {
exit(-1);
}
if (ssh_authenticate(p_ssh_session) == 1) {
do {
message = ssh_message_get(p_ssh_session);
if (message) {
if (ssh_message_type(message) == SSH_REQUEST_CHANNEL_OPEN && ssh_message_subtype(message) == SSH_CHANNEL_SESSION) {
chan = ssh_message_channel_request_open_reply_accept(message);
ssh_message_free(message);
break;
} else {
ssh_message_reply_default(message);
ssh_message_free(message);
}
} else {
break;
}
} while(!chan);
if (!chan) {
ssh_finalize();
exit(-1);
}
do {
message = ssh_message_get(p_ssh_session);
if (message) {
if (ssh_message_type(message) == SSH_REQUEST_CHANNEL) {
if (ssh_message_subtype(message) == SSH_CHANNEL_REQUEST_SHELL) {
shell = 1;
ssh_channel_request_reply_success(message);
ssh_message_free(message);
break;
} else if (ssh_message_subtype(message) == SSH_CHANNEL_REQUEST_PTY) {
ssh_channel_request_reply_success(message);
ssh_message_free(message);
continue;
}
}
} else {
break;
}
} while (!shell);
if (!shell) {
ssh_finalize();
exit(-1);
}
}
exit(0);
} else if (pid > 0) {
} else {
}
}
}
}
void server(int port) {
struct sigaction sa;
struct sigaction st;
int socket_desc, client_sock, c;
int pid;
struct sockaddr_in server, client;
sa.sa_handler = sigchld_handler; // reap all dead processes
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
if (sigaction(SIGCHLD, &sa, NULL) == -1) {
remove(conf.pid_file);
perror("sigaction");
exit(1);
}
st.sa_handler = sigterm_handler;
sigemptyset(&st.sa_mask);
if (sigaction(SIGTERM, &st, NULL) == -1) {
remove(conf.pid_file);
perror("sigaction");
exit(1);
}
socket_desc = socket(AF_INET, SOCK_STREAM, 0);
if (socket_desc == -1) {
remove(conf.pid_file);
fprintf(stderr, "Couldn't create socket..\n");
exit(1);
}
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons(port);
if (bind(socket_desc, (struct sockaddr *)&server, sizeof(server)) < 0) {
perror("Bind Failed, Error\n");
exit(1);
}
listen(socket_desc, 3);
c = sizeof(struct sockaddr_in);
while ((client_sock = accept(socket_desc, (struct sockaddr *)&client, (socklen_t *)&c))) {
if (client_sock == -1) {
if (errno == EINTR) {
continue;
} else {
exit(-1);
}
}
pid = fork();
if (pid < 0) {
perror("Error on fork\n");
exit(1);
}
if (pid == 0) {
close(socket_desc);
runbbs(client_sock, strdup(inet_ntoa(client.sin_addr)));
exit(0);
} else {
close(client_sock);
}
}
}
int main(int argc, char **argv) {
int port;
int i;
int main_pid;
FILE *fptr;
struct stat s;
if (argc < 2) {
fprintf(stderr, "Usage ./magicka config/bbs.ini\n");
exit(1);
}
conf.mail_conference_count = 0;
conf.door_count = 0;
conf.file_directory_count = 0;
conf.irc_server = NULL;
conf.irc_port = 6667;
conf.text_file_count = 0;
conf.external_editor_cmd = NULL;
conf.log_path = NULL;
conf.script_path = NULL;
conf.automsgwritelvl = 10;
conf.echomail_sem = NULL;
conf.netmail_sem = NULL;
conf.telnet_port = 0;
// Load BBS data
if (ini_parse(argv[1], handler, &conf) <0) {
fprintf(stderr, "Unable to load configuration ini (%s)!\n", argv[1]);
exit(-1);
}
// Load mail Areas
for (i=0;i<conf.mail_conference_count;i++) {
if (ini_parse(conf.mail_conferences[i]->path, mail_area_handler, conf.mail_conferences[i]) <0) {
fprintf(stderr, "Unable to load configuration ini (%s)!\n", conf.mail_conferences[i]->path);
exit(-1);
}
}
// Load file Subs
for (i=0;i<conf.file_directory_count;i++) {
if (ini_parse(conf.file_directories[i]->path, file_sub_handler, conf.file_directories[i]) <0) {
fprintf(stderr, "Unable to load configuration ini (%s)!\n", conf.file_directories[i]->path);
exit(-1);
}
}
if (ini_parse("config/doors.ini", door_config_handler, &conf) <0) {
fprintf(stderr, "Unable to load configuration ini (doors.ini)!\n");
exit(-1);
}
if (conf.fork) {
if (stat(conf.pid_file, &s) == 0) {
fprintf(stderr, "Magicka already running or stale pid file at: %s\n", conf.pid_file);
exit(-1);
}
main_pid = fork();
if (main_pid < 0) {
fprintf(stderr, "Error forking.\n");
exit(-1);
} else
if (main_pid > 0) {
fptr = fopen(conf.pid_file, "w");
if (!fptr) {
fprintf(stderr, "Unable to open pid file for writing.\n");
} else {
fprintf(fptr, "%d", main_pid);
fclose(fptr);
}
} else {
server(conf.port);
}
} else {
server(conf.port);
}
}