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#include <stdio.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "pseccomp.h"
#include "capabilities.h"
#include "log.h"
#include "log_colored.h"
#include "utils.h"
#include "redirector.h"
#include "protocol_ssh.h"
#include "forward.h"
#include "jail.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
static void ssh_protocol_preinit(const char *ssh_ports[], protocol_ctx *ctx[],
const char *jail_ports[], const size_t siz);
static void ssh_protocol_init(protocol_ctx *ctx[], const size_t siz);
static void ssh_protocol_preinit(const char *ssh_ports[], protocol_ctx *ctx[],
const char *jail_ports[], const size_t siz)
{
for (size_t i = 0; i < siz; ++i) {
ABORT_ON_FATAL( proto_init_ctx(&ctx[i], ssh_init_cb),
"SSH Protocol init" );
ABORT_ON_FATAL( proto_setup(ctx[i], "127.0.0.1", ssh_ports[i],
"127.0.0.1", jail_ports[i]), "SSH Protocol setup" );
ABORT_ON_FATAL( proto_validate_ctx(ctx[i]),
"SSH validation" );
}
}
static void ssh_protocol_init(protocol_ctx *ctx[], const size_t siz)
{
for (size_t i = 0; i < siz; ++i) {
ABORT_ON_FATAL( proto_listen(ctx[i]),
"SSH Protocol listen" );
}
}
int main(int argc, char *argv[])
{
const size_t rdr_siz = 3;
const size_t proto_siz = 2;
const size_t jail_siz = 2;
const char *rdr_ports[rdr_siz];
const char *proto_ports[proto_siz];
const char *jail_ports[jail_siz];
redirector_ctx *rdr[rdr_siz];
protocol_ctx *ssh_proto[proto_siz];
jail_ctx *jail[jail_siz];
event_ctx *rdr_event = NULL;
event_ctx *jail_event = NULL;
int proc_status;
pid_t daemon_pid, rdr_pid, jail_pid, child_pid;
pseccomp_ctx *psc = NULL;
(void) argc;
(void) argv;
arg0 = argv[0];
LOG_SET_FUNCS_VA(LOG_COLORED_FUNCS);
#ifdef HAVE_CONFIG_H
N("%s (C) 2018 Toni Uhlig (%s)", PACKAGE_STRING, PACKAGE_BUGREPORT);
#endif
if (geteuid() != 0) {
E("%s", "I was made for root!");
exit(EXIT_FAILURE);
}
caps_default_filter();
pseccomp_init(&psc, 0);
if (pseccomp_default_rules(psc))
FATAL("%s", "SECCOMP: adding default rules");
pseccomp_free(&psc);
D("%s", "Forking into background/foreground");
daemon_pid = daemonize(1);
ABORT_ON_FATAL( daemon_pid > 0, "Forking" );
if (daemon_pid == 0) {
set_procname("[potd] main");
} else {
FATAL("Forking (fork returned %d)", daemon_pid);
}
D2("Master pid: %d", getpid());
ABORT_ON_FATAL( set_master_sighandler(),
"Master sighandler" );
memset(jail, 0, sizeof(jail));
jail_ports[0] = "33333";
jail_ports[1] = "33334";
for (size_t i = 0; i < jail_siz; ++i) {
D("Initialising jail service on port %s", jail_ports[i]);
jail_init_ctx(&jail[i], MAX_STACKSIZE);
//jail[i]->newroot = strdup("/home/lns/git/busybox/sysroot");
jail[i]->newroot = strdup("/home/toni/git/busybox/_install");
ABORT_ON_FATAL( jail_setup(jail[i], "127.0.0.1", jail_ports[i]),
"Jail daemon setup" );
ABORT_ON_FATAL( jail_validate_ctx(jail[i]),
"Jail validation" );
}
ABORT_ON_FATAL( jail_setup_event( jail, jail_siz, &jail_event ),
"Jail daemon epoll setup" );
jail_pid = jail_daemonize(&jail_event, jail, jail_siz);
ABORT_ON_FATAL( jail_pid < 1, "Jail daemon startup" );
memset(ssh_proto, 0, sizeof(proto_ports));
proto_ports[0] = "22222";
proto_ports[1] = "22223";
assert(SIZEOF(proto_ports) == SIZEOF(jail_ports));
ssh_protocol_preinit(proto_ports, ssh_proto, jail_ports, proto_siz);
ssh_protocol_init(ssh_proto, proto_siz);
memset(rdr, 0, sizeof(rdr));
rdr_ports[0] = "2222";
rdr_ports[1] = "2223";
rdr_ports[2] = "22050";
for (size_t i = 0; i < rdr_siz; ++i) {
D("Initialising redirector service on port %s", rdr_ports[i]);
ABORT_ON_FATAL( redirector_init_ctx(&rdr[i]),
"Redirector init" );
ABORT_ON_FATAL( redirector_setup(rdr[i], NULL, rdr_ports[i],
"127.0.0.1", "22222"), "Redirector setup" );
ABORT_ON_FATAL( redirector_validate_ctx(rdr[i]),
"Redirector validation" );
}
D2("%s", "Redirector event setup");
ABORT_ON_FATAL( redirector_setup_event( rdr, rdr_siz, &rdr_event ),
"Redirector event setup" );
N("%s", "Redirector epoll mainloop");
rdr_pid = redirector_daemonize( rdr_event, rdr, rdr_siz );
ABORT_ON_FATAL( rdr_pid < 1, "Server epoll mainloop" );
while (1) {
child_pid = wait(&proc_status);
if (child_pid == jail_pid ||
child_pid == rdr_pid) {
E2("%s daemon with pid %d terminated, exiting",
(child_pid == jail_pid ? "Jail" : "Redirector"),
(child_pid == jail_pid ? jail_pid : rdr_pid));
kill(0, SIGTERM);
break;
}
}
return 0;
}
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