int status_client_ncurses(struct conf **confs)
{
int ret=-1;
int csin=-1;
int csout=-1;
pid_t childpid=-1;
struct async *as=NULL;
const char *monitor_logfile=get_string(confs[OPT_MONITOR_LOGFILE]);
struct asfd *so_asfd=NULL;
struct sel *sel=NULL;
if(!(sel=sel_alloc()))
goto end;
setup_signals();
// Fork a burp child process that will contact the server over SSL.
// We will read and write from and to its stdout and stdin.
if((childpid=fork_monitor(&csin, &csout, confs))<0)
goto end;
//printf("childpid: %d\n", childpid);
if(!(as=async_alloc())
|| as->init(as, 0)
|| !setup_asfd_linebuf_write(as, "monitor stdin", &csin)
|| !setup_asfd_linebuf_read(as, "monitor stdout", &csout))
goto end;
//printf("ml: %s\n", monitor_logfile);
#ifdef HAVE_NCURSES
if(actg==ACTION_STATUS)
{
if(!setup_asfd_ncurses_stdin(as))
goto end;
ncurses_init();
}
#endif
if(!(so_asfd=setup_asfd_stdout(as)))
goto end;
if(monitor_logfile
&& !(lfzp=fzp_open(monitor_logfile, "wb")))
goto end;
log_fzp_set_direct(lfzp);
ret=status_client_ncurses_main_loop(as, so_asfd, sel,
get_string(confs[OPT_ORIG_CLIENT]));
end:
#ifdef HAVE_NCURSES
if(actg==ACTION_STATUS)
ncurses_free();
#endif
if(ret) logp("%s exiting with error: %d\n", __func__, ret);
fzp_close(&lfzp);
async_asfd_free_all(&as);
close_fd(&csin);
close_fd(&csout);
sel_free(&sel);
return ret;
}
static int run_server(struct conf **confs, const char *conffile,
int *rfds, int *sfds)
{
int i=0;
int ret=-1;
SSL_CTX *ctx=NULL;
int found_normal_child=0;
struct asfd *asfd=NULL;
struct asfd *scfd=NULL;
struct async *mainas=NULL;
const char *port=get_string(confs[OPT_PORT]);
const char *address=get_string(confs[OPT_ADDRESS]);
const char *status_port=get_string(confs[OPT_STATUS_PORT]);
const char *status_address=get_string(confs[OPT_STATUS_ADDRESS]);
if(!(ctx=ssl_initialise_ctx(confs)))
{
logp("error initialising ssl ctx\n");
goto end;
}
if((ssl_load_dh_params(ctx, confs)))
{
logp("error loading dh params\n");
goto end;
}
if(init_listen_socket(address, port, rfds)
|| init_listen_socket(status_address, status_port, sfds))
goto end;
if(!(mainas=async_alloc())
|| mainas->init(mainas, 0))
goto end;
for(i=0; i<LISTEN_SOCKETS && rfds[i]!=-1; i++)
{
struct asfd *newfd;
if(!(newfd=setup_asfd(mainas,
"main server socket", &rfds[i])))
goto end;
newfd->fdtype=ASFD_FD_SERVER_LISTEN_MAIN;
}
for(i=0; i<LISTEN_SOCKETS && sfds[i]!=-1; i++)
{
struct asfd *newfd;
if(!(newfd=setup_asfd(mainas,
"main server status socket", &sfds[i])))
goto end;
newfd->fdtype=ASFD_FD_SERVER_LISTEN_STATUS;
}
while(!hupreload)
{
switch(mainas->read_write(mainas))
{
case 0:
for(asfd=mainas->asfd; asfd; asfd=asfd->next)
{
if(asfd->new_client)
{
// Incoming client.
asfd->new_client=0;
if(process_incoming_client(asfd,
ctx, conffile, confs))
goto end;
if(!get_int(confs[OPT_FORK]))
{
gentleshutdown++;
ret=1;
goto end;
}
continue;
}
}
break;
default:
int removed=0;
// Maybe one of the fds had a problem.
// Find and remove it and carry on if possible.
for(asfd=mainas->asfd; asfd; )
{
struct asfd *a;
if(!asfd->want_to_remove)
{
asfd=asfd->next;
continue;
}
mainas->asfd_remove(mainas, asfd);
logp("%s: disconnected fd %d\n",
asfd->desc, asfd->fd);
a=asfd->next;
asfd_free(&asfd);
asfd=a;
removed++;
}
if(removed) break;
// If we got here, there was no fd to remove.
// It is a fatal error.
goto end;
}
for(asfd=mainas->asfd; asfd; asfd=asfd->next)
{
if(asfd->fdtype!=ASFD_FD_SERVER_PIPE_READ
|| !asfd->rbuf->buf) continue;
// One of the child processes is giving us information.
// Try to append it to any of the status child pipes.
for(scfd=mainas->asfd; scfd; scfd=scfd->next)
{
if(scfd->fdtype!=ASFD_FD_SERVER_PIPE_WRITE)
continue;
switch(scfd->append_all_to_write_buffer(scfd,
asfd->rbuf))
{
case APPEND_OK:
case APPEND_BLOCKED:
break;
default:
goto end;
}
}
// Free the information, even if we did not manage
// to append it. That should be OK, more will be along
// soon.
iobuf_free_content(asfd->rbuf);
}
chld_check_for_exiting(mainas);
// Leave if we had a SIGUSR1 and there are no children running.
if(gentleshutdown)
{
if(!gentleshutdown_logged)
{
logp("got SIGUSR2 gentle reload signal\n");
logp("will shut down once children have exited\n");
gentleshutdown_logged++;
}
// FIX THIS:
// found_normal_child=chld_add_fd_to_normal_sets(confs, &fsr, &fse, &mfd);
else if(!found_normal_child)
{
logp("all children have exited - shutting down\n");
break;
}
}
}
if(hupreload) logp("got SIGHUP reload signal\n");
ret=0;
end:
async_asfd_free_all(&mainas);
if(ctx) ssl_destroy_ctx(ctx);
return ret;
}
static int run_child(int *cfd, SSL_CTX *ctx, struct sockaddr_storage *addr,
int status_wfd, int status_rfd, const char *conffile, int forking)
{
int ret=-1;
int ca_ret=0;
SSL *ssl=NULL;
BIO *sbio=NULL;
struct conf **confs=NULL;
struct conf **cconfs=NULL;
struct cntr *cntr=NULL;
struct async *as=NULL;
const char *cname=NULL;
struct asfd *asfd=NULL;
int is_status_server=0;
if(!(confs=confs_alloc())
|| !(cconfs=confs_alloc()))
goto end;
set_peer_env_vars(addr);
// Reload global config, in case things have changed. This means that
// the server does not need to be restarted for most conf changes.
confs_init(confs);
confs_init(cconfs);
if(conf_load_global_only(conffile, confs)) goto end;
// Hack to keep forking turned off if it was specified as off on the
// command line.
if(!forking) set_int(confs[OPT_FORK], 0);
if(!(sbio=BIO_new_socket(*cfd, BIO_NOCLOSE))
|| !(ssl=SSL_new(ctx)))
{
logp("There was a problem joining ssl to the socket\n");
goto end;
}
SSL_set_bio(ssl, sbio, sbio);
/* Do not try to check peer certificate straight away.
Clients can send a certificate signing request when they have
no certificate. */
SSL_set_verify(ssl, SSL_VERIFY_PEER
/* | SSL_VERIFY_FAIL_IF_NO_PEER_CERT */, 0);
if(ssl_do_accept(ssl))
goto end;
if(!(as=async_alloc())
|| as->init(as, 0)
|| !(asfd=setup_asfd_ssl(as, "main socket", cfd, ssl)))
goto end;
asfd->set_timeout(asfd, get_int(confs[OPT_NETWORK_TIMEOUT]));
asfd->ratelimit=get_float(confs[OPT_RATELIMIT]);
if(authorise_server(as->asfd, confs, cconfs)
|| !(cname=get_string(cconfs[OPT_CNAME])) || !*cname)
{
// Add an annoying delay in case they are tempted to
// try repeatedly.
log_and_send(as->asfd, "unable to authorise on server");
sleep(1);
goto end;
}
if(!get_int(cconfs[OPT_ENABLED]))
{
log_and_send(as->asfd, "client not enabled on server");
sleep(1);
goto end;
}
// Set up counters. Have to wait until here to get cname.
if(!(cntr=cntr_alloc())
|| cntr_init(cntr, cname))
goto end;
set_cntr(confs[OPT_CNTR], cntr);
set_cntr(cconfs[OPT_CNTR], cntr);
/* At this point, the client might want to get a new certificate
signed. Clients on 1.3.2 or newer can do this. */
if((ca_ret=ca_server_maybe_sign_client_cert(as->asfd, confs, cconfs))<0)
{
logp("Error signing client certificate request for %s\n",
cname);
goto end;
}
else if(ca_ret>0)
{
// Certificate signed and sent back.
// Everything is OK, but we will close this instance
// so that the client can start again with a new
// connection and its new certificates.
logp("Signed and returned client certificate request for %s\n",
cname);
ret=0;
goto end;
}
/* Now it is time to check the certificate. */
if(ssl_check_cert(ssl, confs, cconfs))
{
log_and_send(as->asfd, "check cert failed on server");
goto end;
}
if(status_rfd>=0)
{
is_status_server=1;
if(!setup_asfd(as, "status server parent socket", &status_rfd))
goto end;
}
ret=child(as, is_status_server, status_wfd, confs, cconfs);
end:
*cfd=-1;
if(as && asfd_flush_asio(as->asfd))
ret=-1;
async_asfd_free_all(&as); // This closes cfd for us.
logp("exit child\n");
if(cntr) cntr_free(&cntr);
if(confs)
{
set_cntr(confs[OPT_CNTR], NULL);
confs_free(&confs);
}
if(cconfs)
{
set_cntr(cconfs[OPT_CNTR], NULL);
confs_free(&cconfs);
}
return ret;
}
static int process_incoming_client(struct asfd *asfd, SSL_CTX *ctx,
const char *conffile, struct conf **confs)
{
int cfd=-1;
pid_t childpid;
int pipe_rfd[2];
int pipe_wfd[2];
socklen_t client_length=0;
struct sockaddr_storage client_name;
enum asfd_fdtype fdtype=asfd->fdtype;
int forking=get_int(confs[OPT_FORK]);
client_length=sizeof(client_name);
if((cfd=accept(asfd->fd,
(struct sockaddr *)&client_name, &client_length))==-1)
{
// Look out, accept will get interrupted by SIGCHLDs.
if(errno==EINTR) return 0;
logp("accept failed on %s (%d) in %s: %s\n", asfd->desc,
asfd->fd, __func__, strerror(errno));
return -1;
}
reuseaddr(cfd);
if(log_peer_address(&client_name))
return -1;
if(!forking)
return run_child(&cfd, ctx,
&client_name, -1, -1, conffile, forking);
if(chld_check_counts(confs, asfd))
{
logp("Closing new connection.\n");
close_fd(&cfd);
return 0;
}
if(pipe(pipe_rfd)<0 || pipe(pipe_wfd)<0)
{
logp("pipe failed: %s", strerror(errno));
close_fd(&cfd);
return -1;
}
switch((childpid=fork()))
{
case -1:
logp("fork failed: %s\n", strerror(errno));
return -1;
case 0:
{
// Child.
int p;
int ret;
struct sigaction sa;
struct async *as=asfd->as;
async_asfd_free_all(&as);
// Close unnecessary file descriptors.
// Go up to FD_SETSIZE and hope for the best.
// FIX THIS: Now that async_asfd_free_all() is doing
// everything, double check whether this is needed.
for(p=3; p<(int)FD_SETSIZE; p++)
{
if(p!=pipe_rfd[1]
&& p!=pipe_wfd[0]
&& p!=cfd)
close(p);
}
// Set SIGCHLD back to default, so that I
// can get sensible returns from waitpid.
memset(&sa, 0, sizeof(sa));
sa.sa_handler=SIG_DFL;
sigaction(SIGCHLD, &sa, NULL);
close(pipe_rfd[0]); // close read end
close(pipe_wfd[1]); // close write end
confs_free_content(confs);
confs_init(confs);
ret=run_child(&cfd, ctx, &client_name, pipe_rfd[1],
fdtype==ASFD_FD_SERVER_LISTEN_STATUS?pipe_wfd[0]:-1,
conffile, forking);
close(pipe_rfd[1]);
close(pipe_wfd[0]);
close_fd(&cfd);
exit(ret);
}
default:
// Parent.
close(pipe_rfd[1]); // close write end
close(pipe_wfd[0]); // close read end
close_fd(&cfd);
return setup_parent_child_pipes(asfd, childpid,
&pipe_rfd[0], &pipe_wfd[1]);
}
}
int status_client_ncurses(enum action act, struct conf **confs)
{
int csin=-1;
int csout=-1;
int ret=-1;
pid_t childpid=-1;
struct async *as=NULL;
const char *monitor_logfile=get_string(confs[OPT_MONITOR_LOGFILE]);
#ifdef HAVE_NCURSES_H
actg=act; // So that the sighandler can call endwin().
#else
if(act==ACTION_STATUS)
{
printf("To use the live status monitor, you need to recompile with ncurses support.\n");
goto end;
}
#endif
setup_signals();
// Fork a burp child process that will contact the server over SSL.
// We will read and write from and to its stdout and stdin.
if((childpid=fork_monitor(&csin, &csout, confs))<0)
goto end;
//printf("childpid: %d\n", childpid);
set_non_blocking(csin);
set_non_blocking(csout);
if(!(as=async_alloc())
|| as->init(as, 0)
|| !setup_asfd(as, "monitor stdin", &csin, NULL,
ASFD_STREAM_LINEBUF, ASFD_FD_CLIENT_MONITOR_WRITE, -1, confs)
|| !setup_asfd(as, "monitor stdout", &csout, NULL,
ASFD_STREAM_LINEBUF, ASFD_FD_CLIENT_MONITOR_READ, -1, confs))
goto end;
//printf("ml: %s\n", monitor_logfile);
#ifdef HAVE_NCURSES_H
if(actg==ACTION_STATUS)
{
int stdinfd=fileno(stdin);
if(!setup_asfd(as, "stdin", &stdinfd, NULL,
ASFD_STREAM_NCURSES_STDIN, ASFD_FD_CLIENT_NCURSES_READ,
-1, confs))
goto end;
ncurses_init();
}
#endif
if(monitor_logfile
&& !(lfp=open_file(monitor_logfile, "wb")))
goto end;
set_logfp_direct(lfp);
ret=main_loop(as, act, confs);
end:
#ifdef HAVE_NCURSES_H
if(actg==ACTION_STATUS) endwin();
#endif
if(ret) logp("%s exiting with error: %d\n", __func__, ret);
close_fp(&lfp);
async_asfd_free_all(&as);
close_fd(&csin);
close_fd(&csout);
return ret;
}
