int extra_comms(struct async *as, struct conf **confs,
enum action *action, char **incexc)
{
int ret=-1;
char *feat=NULL;
struct asfd *asfd;
struct iobuf *rbuf;
const char *orig_client=get_string(confs[OPT_ORIG_CLIENT]);
asfd=as->asfd;
rbuf=asfd->rbuf;
if(asfd->write_str(asfd, CMD_GEN, "extra_comms_begin"))
{
logp("Problem requesting extra_comms_begin\n");
goto end;
}
// Servers greater than 1.3.0 will list the extra_comms
// features they support.
if(asfd->read(asfd))
{
logp("Problem reading response to extra_comms_begin\n");
goto end;
}
feat=rbuf->buf;
if(rbuf->cmd!=CMD_GEN
|| strncmp_w(feat, "extra_comms_begin ok"))
{
iobuf_log_unexpected(rbuf, __func__);
goto end;
}
logp("%s\n", feat);
iobuf_init(rbuf);
// Can add extra bits here. The first extra bit is the
// autoupgrade stuff.
if(server_supports_autoupgrade(feat)
&& get_string(confs[OPT_AUTOUPGRADE_DIR])
&& get_string(confs[OPT_AUTOUPGRADE_OS])
&& autoupgrade_client(as, confs))
goto end;
// :srestore: means that the server wants to do a restore.
if(server_supports(feat, ":srestore:"))
{
if(get_int(confs[OPT_SERVER_CAN_RESTORE]))
{
logp("Server is initiating a restore\n");
if(incexc_recv_client_restore(asfd, incexc, confs))
goto end;
if(*incexc)
{
if(conf_parse_incexcs_buf(confs, *incexc))
goto end;
*action=ACTION_RESTORE;
log_restore_settings(confs, 1);
}
}
else
{
logp("Server wants to initiate a restore\n");
logp("Client configuration says no\n");
if(asfd->write_str(asfd, CMD_GEN, "srestore not ok"))
goto end;
}
}
if(orig_client)
{
char str[512]="";
snprintf(str, sizeof(str), "orig_client=%s", orig_client);
if(!server_supports(feat, ":orig_client:"))
{
logp("Server does not support switching client.\n");
goto end;
}
if(asfd->write_str(asfd, CMD_GEN, str)
|| asfd->read_expect(asfd, CMD_GEN, "orig_client ok"))
{
logp("Problem requesting %s\n", str);
goto end;
}
logp("Switched to client %s\n", orig_client);
}
// :sincexc: is for the server giving the client the
// incexc config.
if(*action==ACTION_BACKUP
|| *action==ACTION_BACKUP_TIMED
|| *action==ACTION_TIMER_CHECK)
{
if(!*incexc && server_supports(feat, ":sincexc:"))
{
logp("Server is setting includes/excludes.\n");
if(incexc_recv_client(asfd, incexc, confs))
goto end;
if(*incexc && conf_parse_incexcs_buf(confs,
*incexc)) goto end;
}
}
if(server_supports(feat, ":counters:"))
{
if(asfd->write_str(asfd, CMD_GEN, "countersok"))
goto end;
set_int(confs[OPT_SEND_CLIENT_CNTR], 1);
}
// :incexc: is for the client sending the server the
// incexc conf so that it better knows what to do on
// resume.
if(server_supports(feat, ":incexc:")
&& incexc_send_client(asfd, confs))
goto end;
if(server_supports(feat, ":uname:"))
{
const char *clientos=NULL;
#ifdef HAVE_WIN32
#ifdef _WIN64
clientos="Windows 64bit";
#else
clientos="Windows 32bit";
#endif
#else
struct utsname utsname;
if(!uname(&utsname))
clientos=(const char *)utsname.sysname;
#endif
if(clientos)
{
char msg[128]="";
snprintf(msg, sizeof(msg),
"uname=%s", clientos);
if(asfd->write_str(asfd, CMD_GEN, msg))
goto end;
}
}
if(server_supports(feat, ":csetproto:"))
{
char msg[128]="";
// Use protocol2 if no choice has been made on client side.
if(get_e_protocol(confs[OPT_PROTOCOL])==PROTO_AUTO)
{
logp("Server has protocol=0 (auto)\n");
set_e_protocol(confs[OPT_PROTOCOL], PROTO_2);
}
// Send choice to server.
snprintf(msg, sizeof(msg), "protocol=%d",
get_e_protocol(confs[OPT_PROTOCOL]));
if(asfd->write_str(asfd, CMD_GEN, msg))
goto end;
logp("Using protocol=%d\n",
get_e_protocol(confs[OPT_PROTOCOL]));
}
else if(server_supports(feat, ":forceproto=1:"))
{
logp("Server is forcing protocol 1\n");
if(get_e_protocol(confs[OPT_PROTOCOL])!=PROTO_AUTO
&& get_e_protocol(confs[OPT_PROTOCOL])!=PROTO_1)
{
logp("But client has set protocol=%d!\n",
get_e_protocol(confs[OPT_PROTOCOL]));
goto end;
}
set_e_protocol(confs[OPT_PROTOCOL], PROTO_1);
}
else if(server_supports(feat, ":forceproto=2:"))
{
logp("Server is forcing protocol 2\n");
if(get_e_protocol(confs[OPT_PROTOCOL])!=PROTO_AUTO
&& get_e_protocol(confs[OPT_PROTOCOL])!=PROTO_2)
{
logp("But client has set protocol=%d!\n",
get_e_protocol(confs[OPT_PROTOCOL]));
goto end;
}
set_e_protocol(confs[OPT_PROTOCOL], PROTO_2);
}
if(server_supports(feat, ":msg:"))
{
set_int(confs[OPT_MESSAGE], 1);
if(asfd->write_str(asfd, CMD_GEN, "msg"))
goto end;
}
#ifndef RS_DEFAULT_STRONG_LEN
if(server_supports(feat, ":rshash=blake2:"))
{
set_e_rshash(confs[OPT_RSHASH], RSHASH_BLAKE2);
// Send choice to server.
if(asfd->write_str(asfd, CMD_GEN, "rshash=blake2"))
goto end;
}
else
#endif
set_e_rshash(confs[OPT_RSHASH], RSHASH_MD4);
if(asfd->write_str(asfd, CMD_GEN, "extra_comms_end")
|| asfd->read_expect(asfd, CMD_GEN, "extra_comms_end ok"))
{
logp("Problem requesting extra_comms_end\n");
goto end;
}
ret=0;
end:
return ret;
}
/* May return 1 to mean try again. This happens after a successful certificate
signing request so that it connects again straight away with the new
key/certificate.
Returns 2 if there were restore/verify warnings.
Returns 3 if timer conditions were not met.
*/
static int do_client(struct config *conf, enum action act, int vss_restore, int json)
{
int ret=0;
int rfd=-1;
int resume=0;
SSL *ssl=NULL;
BIO *sbio=NULL;
char buf[256]="";
SSL_CTX *ctx=NULL;
struct cntr cntr;
struct cntr p1cntr;
char *incexc=NULL;
char *server_version=NULL;
const char *phase1str="backupphase1";
reset_filecounter(&p1cntr, time(NULL));
reset_filecounter(&cntr, time(NULL));
setup_signals_client();
// settimers(0, 100);
logp("begin client\n");
if(act!=ACTION_ESTIMATE)
{
ssl_load_globals();
if(!(ctx=ssl_initialise_ctx(conf)))
{
logp("error initialising ssl ctx\n");
ret=-1;
goto end;
}
SSL_CTX_set_session_id_context(ctx,
(const unsigned char *)&s_server_session_id_context,
sizeof(s_server_session_id_context));
if((rfd=init_client_socket(conf->server, conf->port))<0)
{
ret=-1;
goto end;
}
if(!(ssl=SSL_new(ctx))
|| !(sbio=BIO_new_socket(rfd, BIO_NOCLOSE)))
{
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
logp("Problem joining SSL to the socket: %s\n", buf);
ret=-1;
goto end;
}
SSL_set_bio(ssl, sbio, sbio);
if(SSL_connect(ssl)<=0)
{
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
logp("SSL connect error: %s\n", buf);
ret=-1;
goto end;
}
}
if((ret=async_init(rfd, ssl, conf, act==ACTION_ESTIMATE)))
goto end;
// Set quality of service bits on backup packets.
if(act==ACTION_BACKUP || act==ACTION_BACKUP_TIMED)
set_bulk_packets();
if(act!=ACTION_ESTIMATE)
{
char cmd=0;
size_t len=0;
char *feat=NULL;
int ca_ret=0;
if((ret=authorise_client(conf, &server_version, &p1cntr)))
goto end;
if(server_version)
{
logp("Server version: %s\n", server_version);
// Servers before 1.3.2 did not tell us their versions.
// 1.3.2 and above can do the automatic CA stuff that
// follows.
if((ca_ret=ca_client_setup(conf, &p1cntr))<0)
{
// Error
logp("Error with certificate signing request\n");
ret=-1;
goto end;
}
else if(ca_ret>0)
{
// Certificate signed successfully.
// Everything is OK, but we will reconnect now, in
// order to use the new keys/certificates.
ret=1;
goto end;
}
}
set_non_blocking(rfd);
if((ret=ssl_check_cert(ssl, conf)))
{
logp("check cert failed\n");
goto end;
}
if((ret=async_write_str(CMD_GEN, "extra_comms_begin")))
{
logp("Problem requesting extra_comms_begin\n");
goto end;
}
// Servers greater than 1.3.0 will list the extra_comms
// features they support.
else if((ret=async_read(&cmd, &feat, &len)))
{
logp("Problem reading response to extra_comms_begin\n");
goto end;
}
else if(cmd!=CMD_GEN)
{
logp("Unexpected command from server when reading response to extra_comms_begin: %c:%s\n", cmd, feat);
ret=-1;
goto end;
}
else if(strncmp(feat,
"extra_comms_begin ok", strlen("extra_comms_begin ok")))
{
logp("Unexpected response from server when reading response to extra_comms_begin: %c:%s\n", cmd, feat);
ret=-1;
goto end;
}
// Can add extra bits here. The first extra bit is the
// autoupgrade stuff.
if(server_supports_autoupgrade(feat))
{
if(conf->autoupgrade_dir && conf->autoupgrade_os
&& (ret=autoupgrade_client(conf, &p1cntr)))
goto end;
}
// :srestore: means that the server wants to do a restore.
if(server_supports(feat, ":srestore:"))
{
if(conf->server_can_restore)
{
logp("Server is initiating a restore\n");
if(incexc) { free(incexc); incexc=NULL; }
if((ret=incexc_recv_client_restore(&incexc,
conf, &p1cntr)))
goto end;
if(incexc)
{
if((ret=parse_incexcs_buf(conf,
incexc))) goto end;
act=ACTION_RESTORE;
log_restore_settings(conf, 1);
}
}
else
{
logp("Server wants to initiate a restore\n");
logp("Client configuration says no\n");
if(async_write_str(CMD_GEN, "srestore not ok"))
{
ret=-1;
goto end;
}
}
}
if(conf->orig_client)
{
char str[512]="";
snprintf(str, sizeof(str),
"orig_client=%s", conf->orig_client);
if(!server_supports(feat, ":orig_client:"))
{
logp("Server does not support switching client.\n");
ret=-1;
goto end;
}
if((ret=async_write_str(CMD_GEN, str))
|| (ret=async_read_expect(CMD_GEN, "orig_client ok")))
{
logp("Problem requesting %s\n", str);
ret=-1;
goto end;
}
logp("Switched to client %s\n", conf->orig_client);
}
// :sincexc: is for the server giving the client the
// incexc config.
if(act==ACTION_BACKUP
|| act==ACTION_BACKUP_TIMED)
{
if(!incexc && server_supports(feat, ":sincexc:"))
{
logp("Server is setting includes/excludes.\n");
if(incexc) { free(incexc); incexc=NULL; }
if((ret=incexc_recv_client(&incexc,
conf, &p1cntr))) goto end;
if(incexc && (ret=parse_incexcs_buf(conf,
incexc))) goto end;
}
}
if(server_supports(feat, ":counters:"))
{
if(async_write_str(CMD_GEN, "countersok"))
goto end;
conf->send_client_counters=1;
}
// :incexc: is for the client sending the server the
// incexc config so that it better knows what to do on
// resume.
if(server_supports(feat, ":incexc:")
&& (ret=incexc_send_client(conf, &p1cntr)))
goto end;
if((ret=async_write_str(CMD_GEN, "extra_comms_end"))
|| (ret=async_read_expect(CMD_GEN, "extra_comms_end ok")))
{
logp("Problem requesting extra_comms_end\n");
goto end;
}
if(feat) free(feat);
}
rfd=-1;
switch(act)
{
case ACTION_BACKUP_TIMED:
phase1str="backupphase1timed";
case ACTION_BACKUP:
{
// Set bulk packets quality of service flags on backup.
if(incexc)
{
logp("Server is overriding the configuration\n");
logp("with the following settings:\n");
if(log_incexcs_buf(incexc))
{
ret=-1;
goto end;
}
}
if(!conf->sdcount)
{
logp("Found no include paths!\n");
ret=-1;
goto end;
}
if(!(ret=maybe_check_timer(phase1str,
conf, &resume)))
{
if(conf->backup_script_pre)
{
int a=0;
const char *args[12];
args[a++]=conf->backup_script_pre;
args[a++]="pre";
args[a++]="reserved2";
args[a++]="reserved3";
args[a++]="reserved4";
args[a++]="reserved5";
args[a++]=NULL;
if(run_script(args,
conf->backup_script_pre_arg,
conf->bprecount,
&p1cntr, 1, 1)) ret=-1;
}
if(!ret && do_backup_client(conf,
resume, 0, &p1cntr, &cntr))
ret=-1;
if((conf->backup_script_post_run_on_fail
|| !ret) && conf->backup_script_post)
{
int a=0;
const char *args[12];
args[a++]=conf->backup_script_post;
args[a++]="post";
// Tell post script whether the restore
// failed.
args[a++]=ret?"1":"0";
args[a++]="reserved3";
args[a++]="reserved4";
args[a++]="reserved5";
args[a++]=NULL;
if(run_script(args,
conf->backup_script_post_arg,
conf->bpostcount,
&cntr, 1, 1)) ret=-1;
}
}
if(ret<0)
logp("error in backup\n");
else if(ret>0)
{
// Timer script said no.
// Have a distinct return value to
// differentiate between other cases
// (ssl reconnection and restore/verify
// warnings).
ret=3;
}
else
logp("backup finished ok\n");
break;
}
case ACTION_RESTORE:
case ACTION_VERIFY:
{
if(conf->restore_script_pre)
{
int a=0;
const char *args[12];
args[a++]=conf->restore_script_pre;
args[a++]="pre";
args[a++]="reserved2";
args[a++]="reserved3";
args[a++]="reserved4";
args[a++]="reserved5";
args[a++]=NULL;
if(run_script(args,
conf->restore_script_pre_arg,
conf->rprecount, &cntr, 1, 1)) ret=-1;
}
if(!ret && do_restore_client(conf,
act, vss_restore, &p1cntr, &cntr)) ret=-1;
if((conf->restore_script_post_run_on_fail
|| !ret) && conf->restore_script_post)
{
int a=0;
const char *args[12];
args[a++]=conf->restore_script_pre;
args[a++]="post";
// Tell post script whether the restore
// failed.
args[a++]=ret?"1":"0";
args[a++]="reserved3";
args[a++]="reserved4";
args[a++]="reserved5";
args[a++]=NULL;
if(run_script(args,
conf->restore_script_post_arg,
conf->rpostcount, &cntr, 1, 1)) ret=-1;
}
// Return non-zero if there were warnings,
// so that the test script can easily check.
if(p1cntr.warning+cntr.warning)
ret=2;
break;
}
case ACTION_ESTIMATE:
if(!ret) ret=do_backup_client(conf, 0, 1,
&p1cntr, &cntr);
break;
case ACTION_DELETE:
if(!ret) ret=do_delete_client(conf);
break;
case ACTION_LIST:
case ACTION_LONG_LIST:
default:
ret=do_list_client(conf, act, json);
break;
}
end:
close_fd(&rfd);
async_free();
if(act!=ACTION_ESTIMATE) ssl_destroy_ctx(ctx);
if(incexc) free(incexc);
if(server_version) free(server_version);
//logp("end client\n");
return ret;
}