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Telodendria/src/Telodendria.c

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/*
* Copyright (C) 2022 Jordan Bancino <@jordan:bancino.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <grp.h>
#include <pwd.h>
#include <Memory.h>
#include <TelodendriaConfig.h>
#include <Log.h>
#include <HashMap.h>
#include <Json.h>
#include <HttpServer.h>
#include <Matrix.h>
#include <Db.h>
#ifdef __OpenBSD__
extern int
pledge(const char *, const char *);
extern int
unveil(const char *, const char *);
#endif
static void
TelodendriaMemoryHook(MemoryAction a, MemoryInfo * i, void *args)
{
LogConfig *lc = (LogConfig *) args;
char *action;
switch (a)
{
case MEMORY_ALLOCATE:
action = "Allocated";
break;
case MEMORY_REALLOCATE:
action = "Re-allocated";
break;
case MEMORY_FREE:
action = "Freed";
break;
case MEMORY_BAD_POINTER:
action = "Bad pointer to";
break;
default:
action = "Unknown operation on";
break;
}
Log(lc, LOG_DEBUG, "%s:%d: %s %lu bytes of memory at %p.",
MemoryInfoGetFile(i), MemoryInfoGetLine(i),
action, MemoryInfoGetSize(i),
MemoryInfoGetPointer(i));
}
static void
TelodendriaMemoryIterator(MemoryInfo * i, void *args)
{
LogConfig *lc = (LogConfig *) args;
/* We haven't freed the logger memory yet */
if (MemoryInfoGetPointer(i) != lc)
{
#define LEN 16
char hexBuf[(LEN * 2) + LEN + 1];
char asciiBuf[LEN + 1];
const unsigned char *pc = MemoryInfoGetPointer(i);
size_t pI = 0;
size_t hI = 0;
size_t aI = 0;
Log(lc, LOG_WARNING, "%s:%d: %lu bytes of memory at %p leaked.",
MemoryInfoGetFile(i), MemoryInfoGetLine(i),
MemoryInfoGetSize(i), MemoryInfoGetPointer(i));
for (pI = 0; pI < MemoryInfoGetSize(i); pI++)
{
if (pI > 0 && pI % LEN == 0)
{
hexBuf[hI - 1] = '\0';
asciiBuf[aI] = '\0';
Log(lc, LOG_DEBUG, "%04x: %s | %s |",
pI - LEN, hexBuf, asciiBuf);
sprintf(hexBuf, "%02x ", pc[pI]);
hI = 3;
if (isprint(pc[pI]))
{
asciiBuf[0] = pc[pI];
}
else
{
asciiBuf[0] = '.';
}
asciiBuf[1] = '\0';
aI = 1;
}
else
{
if (isprint(pc[pI]))
{
asciiBuf[aI] = pc[pI];
}
else
{
asciiBuf[aI] = '.';
}
aI++;
sprintf(hexBuf + hI, "%02x ", pc[pI]);
hI += 3;
}
}
while (hI < sizeof(hexBuf) - 2)
{
hexBuf[hI] = ' ';
hI++;
}
while (aI < sizeof(asciiBuf) - 1)
{
asciiBuf[aI] = ' ';
aI++;
}
hexBuf[hI] = '\0';
asciiBuf[aI] = '\0';
Log(lc, LOG_DEBUG, "%04x: %s | %s |",
pI - (pI % LEN), hexBuf, asciiBuf);
Log(lc, LOG_DEBUG, "%04x", pI);
#undef LEN
}
}
static HttpServer *httpServer = NULL;
static void
TelodendriaSignalHandler(int signalNo)
{
(void) signalNo;
HttpServerStop(httpServer);
}
typedef enum ArgFlag
{
ARG_VERSION = (1 << 0),
ARG_CONFIGTEST = (1 << 1),
ARG_VERBOSE = (1 << 2)
} ArgFlag;
static void
TelodendriaPrintHeader(LogConfig * lc)
{
Log(lc, LOG_INFO,
" .= -=-");
Log(lc, LOG_INFO,
" :.:+ .=:.");
Log(lc, LOG_INFO,
" .=+-==. :.");
Log(lc, LOG_INFO,
" .+- =.");
Log(lc, LOG_INFO,
" .+ :+.");
Log(lc, LOG_INFO,
" ==. -+:");
Log(lc, LOG_INFO,
" =++==--:: =+.");
Log(lc, LOG_INFO,
" .:::--=+=: :+=");
Log(lc, LOG_INFO,
" :==. -=:");
Log(lc, LOG_INFO,
" ===----=-. ... :+.");
Log(lc, LOG_INFO,
" :==+=======: .-+-::-+-=+=");
Log(lc, LOG_INFO,
" .==*%#======= :+- ..");
Log(lc, LOG_INFO,
" .:--=-===+=========-. :+:");
Log(lc, LOG_INFO,
" .=++=::..:============-+=-=-");
Log(lc, LOG_INFO,
":+=: :=+-: .-=========-. .");
Log(lc, LOG_INFO,
" =+++: .:=+-: .:--. .--:==:");
Log(lc, LOG_INFO,
" ::---:.. :=+: ==");
Log(lc, LOG_INFO,
" ++. .+-");
Log(lc, LOG_INFO,
" =+ .+- ...:");
Log(lc, LOG_INFO,
" +- -+-:-+=::+:");
Log(lc, LOG_INFO,
" :=-....:-=: .--: =-");
Log(lc, LOG_INFO,
" -++=:.:::..");
Log(lc, LOG_INFO,
" _____ _ _ _ _");
Log(lc, LOG_INFO,
"|_ _|__| | ___ __| | ___ _ __ __| |_ __(_) __ _");
Log(lc, LOG_INFO,
" | |/ _ \\ |/ _ \\ / _` |/ _ \\ '_ \\ / _` | '__| |/ _` |");
Log(lc, LOG_INFO,
" | | __/ | (_) | (_| | __/ | | | (_| | | | | (_| |");
Log(lc, LOG_INFO,
" |_|\\___|_|\\___/ \\__,_|\\___|_| |_|\\__,_|_| |_|\\__,_|");
Log(lc, LOG_INFO, "Telodendria v" TELODENDRIA_VERSION);
Log(lc, LOG_INFO, "");
Log(lc, LOG_INFO,
"Copyright (C) 2022 Jordan Bancino <@jordan:bancino.net>");
Log(lc, LOG_INFO,
"Documentation/Support: https://telodendria.io");
Log(lc, LOG_INFO, "");
}
int
main(int argc, char **argv)
{
LogConfig *lc;
int exit = EXIT_SUCCESS;
/* Arg parsing */
int opt;
int flags = 0;
char *configArg = NULL;
/* Config file */
FILE *configFile = NULL;
HashMap *config = NULL;
/* Program configuration */
TelodendriaConfig *tConfig = NULL;
/* User validation */
struct passwd *userInfo = NULL;
struct group *groupInfo = NULL;
/* Signal handling */
struct sigaction sigAction;
MatrixHttpHandlerArgs matrixArgs;
memset(&matrixArgs, 0, sizeof(matrixArgs));
lc = LogConfigCreate();
if (!lc)
{
printf("Fatal error: unable to allocate memory for logger.\n");
return EXIT_FAILURE;
}
MemoryHook(TelodendriaMemoryHook, lc);
TelodendriaPrintHeader(lc);
#ifdef __OpenBSD__
Log(lc, LOG_DEBUG, "Attempting pledge...");
if (pledge("stdio rpath wpath cpath flock inet dns getpw id unveil", NULL) != 0)
{
Log(lc, LOG_ERR, "Pledge failed: %s", strerror(errno));
exit = EXIT_FAILURE;
goto finish;
}
#endif
while ((opt = getopt(argc, argv, "f:Vvn")) != -1)
{
switch (opt)
{
case 'f':
configArg = optarg;
break;
case 'V':
flags |= ARG_VERSION;
break;
case 'v':
flags |= ARG_VERBOSE;
break;
case 'n':
flags |= ARG_CONFIGTEST;
break;
case '?':
exit = EXIT_FAILURE;
goto finish;
default:
break;
}
}
if (flags & ARG_VERSION)
{
goto finish;
}
if (!configArg)
{
Log(lc, LOG_ERR, "No configuration file specified.");
exit = EXIT_FAILURE;
goto finish;
}
else if (strcmp(configArg, "-") == 0)
{
configFile = stdin;
}
else
{
fclose(stdin);
#ifdef __OpenBSD__
if (unveil(configArg, "r") != 0)
{
Log(lc, LOG_ERR, "Unable to unveil() configuration file '%s' for reading.", configArg);
exit = EXIT_FAILURE;
goto finish;
}
#endif
configFile = fopen(configArg, "r");
if (!configFile)
{
Log(lc, LOG_ERR, "Unable to open configuration file '%s' for reading.", configArg);
exit = EXIT_FAILURE;
goto finish;
}
}
Log(lc, LOG_NOTICE, "Processing configuration file '%s'.", configArg);
config = JsonDecode(configFile);
fclose(configFile);
if (!config)
{
Log(lc, LOG_ERR, "Syntax error in configuration file.");
exit = EXIT_FAILURE;
goto finish;
}
tConfig = TelodendriaConfigParse(config, lc);
JsonFree(config);
if (!tConfig)
{
exit = EXIT_FAILURE;
goto finish;
}
if (flags & ARG_CONFIGTEST)
{
Log(lc, LOG_INFO, "Configuration is OK.");
goto finish;
}
#ifdef __OpenBSD__
if (unveil(tConfig->dataDir, "rwc") != 0)
{
Log(lc, LOG_ERR, "Unveil of data directory failed: %s", strerror(errno));
exit = EXIT_FAILURE;
goto finish;
}
unveil(NULL, NULL); /* Done with unveil(), so disable it */
#endif
if (!tConfig->logTimestamp || strcmp(tConfig->logTimestamp, "default") != 0)
{
LogConfigTimeStampFormatSet(lc, tConfig->logTimestamp);
}
if (tConfig->flags & TELODENDRIA_LOG_COLOR)
{
LogConfigFlagSet(lc, LOG_FLAG_COLOR);
}
else
{
LogConfigFlagClear(lc, LOG_FLAG_COLOR);
}
LogConfigLevelSet(lc, flags & ARG_VERBOSE ? LOG_DEBUG : tConfig->logLevel);
if (chdir(tConfig->dataDir) != 0)
{
Log(lc, LOG_ERR, "Unable to change into data directory: %s.", strerror(errno));
exit = EXIT_FAILURE;
goto finish;
}
else
{
Log(lc, LOG_DEBUG, "Changed working directory to: %s", tConfig->dataDir);
}
if (tConfig->flags & TELODENDRIA_LOG_FILE)
{
FILE *logFile = fopen("telodendria.log", "a");
if (!logFile)
{
Log(lc, LOG_ERR, "Unable to open log file for appending.");
exit = EXIT_FAILURE;
goto finish;
}
Log(lc, LOG_INFO, "Logging to the log file. Check there for all future messages.");
LogConfigOutputSet(lc, logFile);
}
else if (tConfig->flags & TELODENDRIA_LOG_STDOUT)
{
Log(lc, LOG_DEBUG, "Already logging to standard output.");
}
else if (tConfig->flags & TELODENDRIA_LOG_SYSLOG)
{
Log(lc, LOG_INFO, "Logging to the syslog. Check there for all future messages.");
LogConfigFlagSet(lc, LOG_FLAG_SYSLOG);
openlog("telodendria", LOG_PID | LOG_NDELAY, LOG_DAEMON);
/* Always log everything, because the Log API will control what
* messages get passed to the syslog */
setlogmask(LOG_UPTO(LOG_DEBUG));
}
else
{
Log(lc, LOG_ERR, "Unknown logging method in flags: '%d'", tConfig->flags);
Log(lc, LOG_ERR, "This is a programmer error; please report it.");
exit = EXIT_FAILURE;
goto finish;
}
Log(lc, LOG_DEBUG, "Configuration:");
LogConfigIndent(lc);
Log(lc, LOG_DEBUG, "Listen On: %d", tConfig->listenPort);
Log(lc, LOG_DEBUG, "Server Name: %s", tConfig->serverName);
Log(lc, LOG_DEBUG, "Base URL: %s", tConfig->baseUrl);
Log(lc, LOG_DEBUG, "Identity Server: %s", tConfig->identityServer);
Log(lc, LOG_DEBUG, "Run As: %s:%s", tConfig->uid, tConfig->gid);
Log(lc, LOG_DEBUG, "Data Directory: %s", tConfig->dataDir);
Log(lc, LOG_DEBUG, "Threads: %d", tConfig->threads);
Log(lc, LOG_DEBUG, "Max Connections: %d", tConfig->maxConnections);
Log(lc, LOG_DEBUG, "Max Cache: %ld", tConfig->maxCache);
Log(lc, LOG_DEBUG, "Flags: %x", tConfig->flags);
LogConfigUnindent(lc);
/* Arguments to pass into the HTTP handler */
matrixArgs.lc = lc;
matrixArgs.config = tConfig;
/* Bind the socket before possibly dropping permissions */
httpServer = HttpServerCreate(tConfig->listenPort, tConfig->threads, tConfig->maxConnections,
MatrixHttpHandler, &matrixArgs);
if (!httpServer)
{
Log(lc, LOG_ERR, "Unable to create HTTP server on port %d: %s",
tConfig->listenPort, strerror(errno));
exit = EXIT_FAILURE;
goto finish;
}
Log(lc, LOG_DEBUG, "Running as uid:gid: %d:%d.", getuid(), getgid());
if (tConfig->uid && tConfig->gid)
{
userInfo = getpwnam(tConfig->uid);
groupInfo = getgrnam(tConfig->gid);
if (!userInfo || !groupInfo)
{
Log(lc, LOG_ERR, "Unable to locate the user/group specified in the configuration.");
exit = EXIT_FAILURE;
goto finish;
}
else
{
Log(lc, LOG_DEBUG, "Found user/group information using getpwnam() and getgrnam().");
}
}
else
{
Log(lc, LOG_DEBUG, "No user/group info specified in the config.");
}
if (getuid() == 0)
{
#ifndef __OpenBSD__ /* chroot() is only useful without
* unveil() */
if (chroot(".") == 0)
{
Log(lc, LOG_DEBUG, "Changed the root directory to: %s.", tConfig->dataDir);
}
else
{
Log(lc, LOG_WARNING, "Unable to chroot into directory: %s.", tConfig->dataDir);
}
#endif
if (userInfo && groupInfo)
{
if (setgid(groupInfo->gr_gid) != 0 || setuid(userInfo->pw_uid) != 0)
{
Log(lc, LOG_ERR, "Unable to set process uid/gid.");
exit = EXIT_FAILURE;
goto finish;
}
else
{
Log(lc, LOG_DEBUG, "Set uid/gid to %s:%s.", tConfig->uid, tConfig->gid);
}
}
else
{
Log(lc, LOG_WARNING, "We are running as root, and we are not dropping to another user");
Log(lc, LOG_WARNING, "because none was specified in the configuration file.");
Log(lc, LOG_WARNING, "This is probably a security issue.");
}
}
else
{
Log(lc, LOG_WARNING, "Not setting root directory, because we are not root.");
if (tConfig->uid && tConfig->gid)
{
if (getuid() != userInfo->pw_uid || getgid() != groupInfo->gr_gid)
{
Log(lc, LOG_WARNING, "Not running as the uid/gid specified in the configuration.");
}
else
{
Log(lc, LOG_DEBUG, "Running as the uid/gid specified in the configuration.");
}
}
}
/* These config values are no longer needed; don't hold them in
* memory anymore */
Free(tConfig->dataDir);
Free(tConfig->uid);
Free(tConfig->gid);
tConfig->dataDir = NULL;
tConfig->uid = NULL;
tConfig->gid = NULL;
if (!tConfig->maxCache)
{
Log(lc, LOG_WARNING, "Max-cache is set to zero.");
Log(lc, LOG_WARNING,
"If this is not what you intended, check the config file");
Log(lc, LOG_WARNING,
"and ensure that max-cache is a valid number of bytes.");
}
if (tConfig->maxCache < DB_MIN_CACHE)
{
Log(lc, LOG_WARNING,
"Specified max cache size is less than the minimum of %d bytes.",
DB_MIN_CACHE);
Log(lc, LOG_WARNING, "Using a max-cache of %d bytes.", DB_MIN_CACHE);
tConfig->maxCache = DB_MIN_CACHE;
}
matrixArgs.db = DbOpen(".", tConfig->maxCache);
if (!matrixArgs.db)
{
Log(lc, LOG_ERR, "Unable to open data directory as a database.");
exit = EXIT_FAILURE;
goto finish;
}
Log(lc, LOG_NOTICE, "Starting server...");
if (!HttpServerStart(httpServer))
{
Log(lc, LOG_ERR, "Unable to start HTTP server.");
exit = EXIT_FAILURE;
goto finish;
}
Log(lc, LOG_INFO, "Listening on port: %d", tConfig->listenPort);
sigAction.sa_handler = TelodendriaSignalHandler;
sigfillset(&sigAction.sa_mask);
sigAction.sa_flags = SA_RESTART;
if (sigaction(SIGINT, &sigAction, NULL) < 0)
{
Log(lc, LOG_ERR, "Unable to install signal handler.");
exit = EXIT_FAILURE;
goto finish;
}
/* Block this thread until the server is terminated by a signal
* handler */
HttpServerJoin(httpServer);
finish:
Log(lc, LOG_NOTICE, "Shutting down...");
if (httpServer)
{
HttpServerFree(httpServer);
Log(lc, LOG_DEBUG, "Freed HTTP Server.");
}
/*
* If we're not logging to standard output, then we can close it. Otherwise,
* if we are logging to stdout, LogConfigFree() will close it for us.
*/
if (!tConfig || !(tConfig->flags & TELODENDRIA_LOG_STDOUT))
{
fclose(stdout);
}
TelodendriaConfigFree(tConfig);
DbClose(matrixArgs.db);
Log(lc, LOG_DEBUG, "");
MemoryIterate(TelodendriaMemoryIterator, lc);
Log(lc, LOG_DEBUG, "");
Log(lc, LOG_DEBUG, "Exiting with code '%d'.", exit);
LogConfigFree(lc);
MemoryFreeAll();
fclose(stderr);
return exit;
}
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