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/* $Id: SNPPServer.c++,v 1.5 2002/02/15 04:20:50 darren Exp $ */
/*
* Copyright (c) 1995-1996 Sam Leffler
* Copyright (c) 1995-1996 Silicon Graphics, Inc.
* HylaFAX is a trademark of Silicon Graphics
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the names of
* Sam Leffler and Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Sam Leffler and Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifdef SNPP_SUPPORT
/*
* Simple Network Paging Protocol (SNPP) Support.
*/
#include "config.h"
#include "Sys.h"
#include "Socket.h"
#include "SNPPServer.h"
#include "Dispatcher.h"
#include "RegEx.h"
#include <ctype.h>
#if HAS_CRYPT_H
#include <crypt.h>
#endif
extern "C" {
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
}
SNPPSuperServer::SNPPSuperServer(const char* p, int bl)
: SuperServer("SNPP", bl)
, port(p)
{}
SNPPSuperServer::~SNPPSuperServer() {}
bool
SNPPSuperServer::startServer(void)
{
/*
* Switch to super-user to do the bind in case
* we are to use a port in the privileged region
* on a BSD system (ports <=1024 are reserved
* and the default SNPP port is 444).
*
* NB: We do it for both the socket+bind calls
* to workaround a bug in Solaris 2.5.
*/
uid_t ouid = geteuid();
(void) seteuid(0);
int s = socket(AF_INET, SOCK_STREAM, 0);
if (s >= 0) {
struct sockaddr_in sin;
memset(&sin, 0, sizeof (sin));
sin.sin_family = AF_INET;
const char* cp = port;
struct servent* sp = getservbyname(cp, SNPP_PROTONAME);
if (!sp) {
if (isdigit(cp[0]))
sin.sin_port = htons(atoi(cp));
else
sin.sin_port = htons(SNPP_DEFPORT);
} else
sin.sin_port = sp->s_port;
if (Socket::bind(s, &sin, sizeof (sin)) >= 0) {
(void) listen(s, getBacklog());
(void) seteuid(ouid);
Dispatcher::instance().link(s, Dispatcher::ReadMask, this);
return (true); // success
}
Sys::close(s);
logError("HylaFAX %s: bind (port %u): %m",
getKind(), ntohs(sin.sin_port));
} else
logError("HylaFAX %s: socket: %m", getKind());
(void) seteuid(ouid);
return (false);
}
HylaFAXServer* SNPPSuperServer::newChild(void) { return new SNPPServer; }
SNPPServer::SNPPServer() {}
SNPPServer::~SNPPServer() {}
void
SNPPServer::open(void)
{
setupNetwork(STDIN_FILENO);
initServer(); // complete state initialization
fxStr emsg;
if (!initClientFIFO(emsg)) {
logInfo("connection refused (%s) from %s [%s]",
(const char*) emsg,
(const char*) remotehost, (const char*) remoteaddr);
reply(420, "%s server cannot initialize: %s",
(const char*) hostname, (const char*) emsg);
dologout(-1);
}
ctrlFlags = fcntl(STDIN_FILENO, F_GETFL); // for parser
if (isShutdown(true)) {
reply(421, "%s SNPP server unavailable; try again later.",
(const char*) hostname);
dologout(-1);
}
reply(220, "%s SNPP server (%s) ready.", (const char*) hostname, version);
if (TRACE(CONNECT))
logInfo("SNPP connection from %s [%s]",
(const char*) remotehost, (const char*) remoteaddr);
}
void
SNPPServer::initServer(void)
{
InetFaxServer::initServer();
state &= ~S_USEGMT; // SNPP uses local times
resetState();
}
void
SNPPServer::initDefaultJob(void)
{
InetFaxServer::initDefaultJob();
defJob.jobtype = "pager";
initSNPPJob();
}
void
SNPPServer::initSNPPJob(void)
{
defJob.queued = false; // jobs not queued--per protocol
defJob.maxdials = SNPP_DEFREDIALS; // configuration defaults...
defJob.maxtries = SNPP_DEFRETRIES;
defJob.killtime = 60*killMap[SNPP_DEFLEVEL];
defJob.retrytime = retryMap[SNPP_DEFLEVEL];
defJob.usrpri = priMap[SNPP_DEFLEVEL];
// XXX default notification
}
void
SNPPServer::resetState(void)
{
initDefaultJob(); // default job state
msgFile = "";
haveText = false; // no message text yet
msgs.resize(0); // purge any message refs
}
void
SNPPServer::dologout(int status)
{
/*
* Purge any partially constructed jobs. If we were
* doing a SEND when the connection was dropped then
* we do not purge jobs but instead just let them run
* detached. This may not be the best thing; we might
* instead want to kill the jobs--we'll need to think
* about this some more before changing this behaviour.
*/
if (msgs.length() > 0 && !IS(SENDWAIT)) {
fxStr emsg;
for (u_int i = 0, n = msgs.length(); i < n; i++) {
Job* job = findJob(msgs[i], emsg);
if (job) {
for (u_int j = 0, m = job->requests.length(); j < m; j++)
if (job->requests[j].op == FaxRequest::send_data)
(void) Sys::unlink(job->requests[j].item);
(void) Sys::unlink(job->qfile);
delete job;
}
}
}
InetFaxServer::dologout(status);
}
static inline bool
isMagic(char c)
{
return (c == '[' || c == ']' || c == '*' || c == '.' || c == '^' ||
c == '$' || c == '-' || c == '+' || c == '{' || c == '}' ||
c == '(' || c == ')');
}
/*
* Handle \escapes for a pager ID replacement string.
*/
static void
subRHS(fxStr& result, const RegEx& re, const fxStr& match)
{
/*
* Do ``&'' and ``\n'' interpolations in the replacement.
*/
for (u_int i = 0, n = result.length(); i < n; i++) {
if (result[i] == '\\') { // process \<char> escapes
result.remove(i), n--;
if (isdigit(result[i])) {
int mn = result[i] - '0';
int ms = re.StartOfMatch(mn);
int mlen = re.EndOfMatch(mn) - ms;
result.remove(i); // delete \n
result.insert(match.extract(ms, mlen), i);
n = result.length(); // adjust string length ...
i += mlen - 1; // ... and scan index
}
} else if (result[i] == '&') { // process & replacement
int ms = re.StartOfMatch(0);
int mlen = re.EndOfMatch(0) - ms;
result.remove(i); // delete &
result.insert(match.extract(ms, mlen), i);
n = result.length(); // adjust string length ...
i += mlen - 1; // ... and scan index
}
}
}
/*
* Given a client-supplied pager ID return the phone number
* to dial of the service provider and the PIN to supply
* to the provider when talking IXO/TAP (for aliases).
*/
bool
SNPPServer::mapPagerID(const char* pagerID, fxStr& number, fxStr& pin, fxStr& emsg)
{
if (pagerIDMapFile != "") {
FILE* fd = fopen(fixPathname(pagerIDMapFile), "r");
if (fd != NULL) {
char buf[1024];
while (fgets(buf, sizeof (buf), fd)) {
char* cp;
for (cp = buf; isspace(*cp); cp++) // leading whitespace
;
if (*cp == '#' || *cp == '\0')
continue;
/*
* Syntax is:
*
* <pattern> <dialstring>[/<PIN>]
*
* where <pattern> can be a simple string of alpha
* numerics or a regular expression. The first line
* that matches the client-specified pager ID is used.
* If no <PIN> is specified then the client-specified
* string is sent to the provider. If <dialstring>
* is "reject" (verbatim) then matches are rejected.
* <PIN> is treated as the RHS of an RE-style substitution:
* \n and & escapes are replaced according to the RE
* matching work.
*
* Leading white space on a line is ignored. Lines
* that begin with '#' are ignored (i.e. comments).
*/
const char* pattern = cp;
bool isRE = false;
for (; *cp != '\0' && !isspace(*cp); cp++)
if (isMagic(*cp))
isRE = true;
if (*cp != '\0') // \0-term. <pattern>
*cp++ = '\0';
bool match;
RegEx* re;
if (isRE) {
re = new RegEx(pattern);
match = re->Find(pagerID, strlen(pagerID));
} else {
match = streq(pattern, pagerID);
re = NULL;
}
if (match) {
while (isspace(*cp)) // leading whitespace
cp++;
if (*cp != '\n' && *cp != '\0') { // got <dialstring>
char* np = strchr(cp, '\n'); // remove trailing \n
if (np)
*np = '\0';
np = cp;
for (; *cp && *cp != '/'; cp++)
;
if (*cp == '/') { // <dialstring>/<PIN>
*cp++ = '\0';
number = np;
pin = cp;
if (re) { // do substitutions
subRHS(pin, *re, pagerID);
subRHS(number, *re, pagerID);
}
} else { // <dialstring>
number = np;
pin = pagerID;
}
delete re;
(void) fclose(fd);
fxStr s(number);
s.raisecase();
if (s == "REJECT") {
emsg = fxStr::format("Invalid pager ID %s",pagerID);
return (false);
} else
return (true);
}
}
delete re;
}
(void) fclose(fd);
emsg = fxStr::format("Unknown or illegal pager ID %s", pagerID);
} else {
emsg = fxStr::format("Cannot open pager ID mapping file %s (%s)",
(const char*) pagerIDMapFile, strerror(errno));
logError("%s", (const char*) emsg);
}
} else {
emsg = "No pager ID mapping file found";
logError("%s", (const char*) emsg);
}
return (false);
}
/*
* SNPP Parser.
*/
#define N(a) (sizeof (a) / sizeof (a[0]))
/*
* Standard protocol commands.
*/
static const tab cmdtab[] = {
{ "2WAY", T_2WAY, true,false, "(preface 2-way transaction)" },
{ "ABOR", T_ABOR, false, true, "(abort operation)" },
{ "ACKR", T_ACKREAD, true,false, "0|1" },
{ "ALER", T_ALERT, true,false, "alert-level" },
{ "CALL", T_CALLERID, true,false, "caller-ID" },
{ "COVE", T_COVERAGE, true,false, "alternate-area" },
{ "DATA", T_DATA, true, true, "(specify multi-line message)" },
{ "EXPT", T_EXPTAG, true,false, "hours" },
{ "HELP", T_HELP, false, true, "[<string>]" },
{ "HOLD", T_HOLDUNTIL, true, true, "YYYYMMDDHHMMSS [+/-GMT-diff]" },
{ "KTAG", T_KTAG, true,false, "message-tag pass-code" },
{ "LEVE", T_LEVEL, true, true, "service-level" },
{ "LOGI", T_LOGIN, false, true, "username [password]" },
{ "MCRE", T_MCRESPONSE, true,false, "2-byte-code response-text" },
{ "MESS", T_MESSAGE, true, true, "message" },
{ "MSTA", T_MSTATUS, true,false, "message-tag pass-code" },
{ "NOQU", T_NOQUEUEING, true,false, "(disable message queueing)" },
{ "PAGE", T_PAGER, true, true, "pager-ID|alias [PIN]" },
{ "PING", T_PING, true, true, "pager-ID|alias" },
{ "QUIT", T_QUIT, false, true, "(terminate service)" },
{ "RESE", T_REST, true, true, "(reset state)" },
{ "RTYP", T_RTYPE, true,false, "reply-type-code" },
{ "SEND", T_SEND, true, true, "(send message)" },
{ "SITE", T_SITE, true, true, "site-cmd [arguments]" },
{ "STAT", T_STAT, false, true, "(return server status)" },
{ "SUBJ", T_SUBJECT, true, true, "message-subject" },
};
/*
* Site-specific commands.
*/
static const tab sitetab[] = {
{ "FROMUSER", T_FROM_USER, true, true, "[<string>]" },
{ "HELP", T_HELP, false, true, "[<string>]" },
{ "IDLE", T_IDLE, true, true, "[max-idle-timeout]" },
{ "JPARM", T_JPARM, true, true, "(print job parameter status)" },
{ "JQUEUE", T_JQUEUE, true, true, "[on|off]" },
{ "LASTTIME", T_LASTTIME, false, true, "[DDHHSS]" },
{ "MAXDIALS", T_MAXDIALS, true, true, "[<number>]" },
{ "MAXTRIES", T_MAXTRIES, true, true, "[<number>]" },
{ "MODEM", T_MODEM, true, true, "[device|class]" },
{ "NOTIFY", T_NOTIFY, true, true, "[NONE|DONE|REQUEUE|DONE+REQUEUE]"},
{ "MAILADDR", T_NOTIFYADDR, true, true, "[email-address]" },
{ "RETRYTIME", T_RETRYTIME, true, true, "[HHSS]" },
{ "SCHEDPRI", T_SCHEDPRI, true, true, "[<number>]" },
};
static const tab*
lookup(const tab* p, u_int n, const char* cmd)
{
while (n != 0) {
if (strneq(cmd, p->name, 4)) // NB: match on first 4 chars
return (p);
p++, n--;
}
return (NULL);
}
static const char*
tokenName(const tab* p, u_int n, Token t)
{
while (n != 0) {
if (p->token == t)
return (p->name);
p++, n--;
}
return ("???");
}
const char*
SNPPServer::cmdToken(Token t)
{
return tokenName(cmdtab, N(cmdtab), t);
}
const char*
SNPPServer::siteToken(Token t)
{
return tokenName(sitetab, N(sitetab), t);
}
bool
SNPPServer::checklogin(Token t)
{
if (!IS(LOGGEDIN)) {
cmdFailure(t, "not logged in");
reply(530, "Please login with LOGIN.");
return (false);
} else
return (true);
}
/*
* Parse and process command input received on the
* control channel. This method is invoked whenever
* data is present on the control channel. We read
* everything and parse (and execute) as much as possible
* but do not block waiting for more data except when
* a partial line of input is received. This is done
* to ensure other processing will be handled in a
* timely fashion (e.g. processing of messages from
* the scheduler received via the FIFO).
*/
int
SNPPServer::parse()
{
if (IS(WAITDATA)) { // recursive invocation
state &= ~S_WAITDATA;
return (0);
}
if (IS(SENDWAIT)) { // waiting in SEND, discard data
while (getCmdLine(cbuf, sizeof (cbuf)))
;
return (0);
}
// stop control channel idle timeout
Dispatcher::instance().stopTimer(this);
pushToken(T_NIL); // reset state
for (;;) {
/*
* Fetch the next complete line of input received on the
* control channel. This call will fail when no more data
* is *currently* waiting on the control channel. Note
* that this does not mean the connection has dropped; just
* that data is not available at this instant. Note also
* that if a partial line of input is received a complete
* line will be waited for (see below).
*/
if (!getCmdLine(cbuf, sizeof (cbuf)))
break;
/*
* Parse the line of input read above.
*/
if (getToken(T_STRING, "command token")) {
tokenBody.raisecase();
const tab* p = lookup(cmdtab, N(cmdtab), tokenBody);
if (p == NULL)
reply(500, "%s: Command not recognized.",
(const char*) tokenBody);
else if (!p->implemented)
reply(500, "%s: Command not implemented.", p->name);
else if (isShutdown(!IS(LOGGEDIN))) {
reply(421, "Server shutting down. Goodbye.");
dologout(0); // XXX
/*
* If command requires client to be logged in check
* for this. Note that some commands have variants
* that do not require the client be logged in--these
* cannot check here and must do it specially below.
*/
} else if (p->checklogin && !checklogin(p->token))
;
/*
* Command is valid, implemented, and the server
* is available to service it. If the syntax is
* correct then reset the number of consecutive
* bad commands. Note that since part of the syntax
* checking is login validation this logic will also
* catch people typing syntacitcally valid but
* unacceptable commands just to remain connected.
*/
else if (cmd(p->token)) {
consecutiveBadCmds = 0;
continue;
}
}
/*
* If too many consecutive bad commands have been
* received disconnect. This is to safeguard against
* a client that spews trash down the control connection.
*/
if (++consecutiveBadCmds >= maxConsecutiveBadCmds) {
/*
* Check for shutdown so that any shutdown message
* will get prepended to client reply.
*/
(void) isShutdown(!IS(LOGGEDIN));
reply(421, "Too many errors, server shutting down. Goodbye.");
dologout(0);
}
}
Dispatcher::instance().startTimer(idleTimeout, 0, this);
return (0);
}
/*
* Protocol command (one line).
*/
bool
SNPPServer::cmd(Token t)
{
fxStr s;
long n;
time_t tv;
switch (t) {
case T_ABOR: // abort active command (e.g. SEND)
if (CRLF()) {
logcmd(t);
ack(250, cmdToken(t));
return (true);
}
break;
case T_DATA: // submit multi-line message data
if (CRLF()) {
logcmd(t);
dataCmd();
return (true);
}
break;
case T_HELP: // return help
if (opt_CRLF()) {
logcmd(t);
helpCmd(cmdtab, (char*) NULL);
return (true);
} else if (string_param(s, "command name")) {
logcmd(t, "%s", (const char*) s);
s.raisecase();
if (s == "SITE")
helpCmd(sitetab, NULL);
else
helpCmd(cmdtab, s);
return (true);
}
break;
case T_HOLDUNTIL: // set time to send
if (SP() && SNPPTime(tv)) {
if (opt_CRLF()) {
holdCmd(tv);
return (true);
} else if (string_param(s, "GMT-difference")) {
// conver GMT offset to numeric value
int sign = 1;
const char* cp = s;
if (*cp == '-')
cp++, sign = -1;
else if (*cp == '+')
cp++;
time_t off = (time_t) (strtoul(cp, 0, 10)*60 / 100);
holdCmd(tv + sign*off);
return (true);
}
}
break;
case T_LEVEL: // set level of operation
if (number_param(n)) {
logcmd(t, "%lu", n);
serviceLevel((u_int) n);
return (true);
}
break;
case T_LOGIN: // login as user
if (SP() && STRING(s, "login-ID")) {
fxStr pwd;
if (opt_CRLF()) {
logcmd(t, (const char*) s);
loginCmd(s);
return (true);
} else if (string_param(pwd, "password")) {
logcmd(t, "%s <passwd>", (const char*) s);
loginCmd(s, pwd);
return (true);
}
}
break;
case T_MESSAGE: // specify 1-line message data
if (SP() && multi_STRING(s) && CRLF()) {
logcmd(t, "%s", (const char*) s);
messageCmd(s);
return (true);
}
break;
case T_PAGER: // specify destination pager ID
if (SP() && STRING(s, "pager-ID")) {
fxStr pwd;
if (opt_CRLF()) {
logcmd(t, "%s", (const char*) s);
pagerCmd(s);
return (true);
} else if (string_param(pwd, "password/PIN")) {
logcmd(t, "%s <passwd/PIN>", (const char*) s);
pagerCmd(s, pwd);
return (true);
}
}
break;
case T_PING: // localize/verify pager ID
if (string_param(s, "pager-ID")) {
logcmd(t, "%s", (const char*) s);
pingCmd(s);
return (true);
}
break;
case T_QUIT: // terminate session
if (CRLF()) {
logcmd(t);
reply(221, "Goodbye.");
dologout(0);
return (true);
}
break;
case T_REST: // reset server state
logcmd(t);
initServer();
reply(220, "%s server (%s) ready.", (const char*) hostname, version);
break;
case T_SEND: // initiate send operation
if (CRLF()) {
logcmd(t);
sendCmd();
return (true);
}
break;
case T_SITE: // site-specific command
if (SP() && getToken(T_STRING, "site command")) {
tokenBody.raisecase();
const tab* p = lookup(sitetab, N(sitetab), tokenBody);
if (p == NULL) {
reply(500, "SITE %s: Command not recognized.",
(const char*) tokenBody);
} else if (!p->implemented)
reply(500, "SITE %s: Command not implemented.", p->name);
else
return (site_cmd(p->token));
}
break;
case T_STAT: // server status
if (CRLF()) {
logcmd(t);
statusCmd();
return (true);
}
break;
case T_SUBJECT: // message subject
if (SP() && multi_STRING(s) && CRLF()) {
logcmd(t, "%s", (const char*) s);
subjectCmd(s);
return (true);
}
break;
}
return (false);
}
/*
* Site-specific protocol commands (one line).
*/
bool
SNPPServer::site_cmd(Token t)
{
fxStr s;
long n;
time_t tv;
bool b;
switch (t) {
case T_IDLE: // set/query idle timeout
if (opt_CRLF()) {
logcmd(t);
reply(250, "%u seconds.", idleTimeout);
return (true);
} else if (number_param(n)) {
logcmd(t, "%lu", n);
if (n > maxIdleTimeout && !IS(PRIVILEGED)) {
idleTimeout = maxIdleTimeout;
reply(250, "%lu: Idle timeout too large, set to %u.",
n, maxIdleTimeout);
} else {
idleTimeout = (int) n;
reply(250, "Idle timeout set to %u.", idleTimeout);
}
return (true);
}
break;
case T_HELP: // return help
if (opt_CRLF()) {
helpCmd(sitetab, (char*) NULL);
return (true);
} else if (string_param(s, "command name")) {
logcmd(T_SITE, "HELP %s", (const char*) s);
s.raisecase();
helpCmd(sitetab, s);
return (true);
}
break;
case T_JQUEUE:
if (boolean_param(b)) {
logcmd(t, "%s", b ? "YES" : "NO");
defJob.queued = b;
reply(250, "Job will%s be queued.", b ? "" : " not");
return (true);
}
break;
case T_FROM_USER:
case T_MODEM:
case T_NOTIFY:
case T_NOTIFYADDR:
if (SP() && multi_STRING(s) && CRLF() && setJobParameter(defJob, t, s)) {
logcmd(t, "%s", (const char*) s);
reply(250, "%s set to \"%s\".", parmToken(t), (const char*) s);
return (true);
}
break;
case T_MAXDIALS:
case T_MAXTRIES:
case T_SCHEDPRI:
if (number_param(n) && setJobParameter(defJob, t, (u_short) n)) {
logcmd(t, "%lu", n);
reply(250, "%s set to %u.", parmToken(t), n);
return (true);
}
break;
case T_LASTTIME: // time to kill job
if (timespec_param(6, tv) && setJobParameter(defJob, t, tv)) {
logcmd(t, "%02d%02d%02d"
, tv/(24*60*60) , (tv/(60*60))%24 , (tv/60)%60);
reply(250, "%s set to %02d%02d%02d."
, parmToken(t)
, tv/(24*60*60) , (tv/(60*60))%24 , (tv/60)%60);
return (true);
}
break;
case T_RETRYTIME: // retry interval for job
if (timespec_param(4, tv) && setJobParameter(defJob, t, tv)) {
logcmd(t, "%02d%02d" , tv/60, tv%60);
reply(250, "%s set to %02d%02d.", parmToken(t), tv/60, tv%60);
return (true);
}
break;
case T_JPARM: // query job parameters
if (CRLF()) {
logcmd(t);
jstatCmd(defJob);
return (true);
}
break;
}
return (false);
}
/*
* Parse an SNPP time specification.
*/
bool
SNPPServer::SNPPTime(time_t& result)
{
if (getToken(T_STRING, "time specification") && checkNUMBER(tokenBody)) {
u_int tlen = tokenBody.length();
const char* cp = tokenBody;
// YYMMDDHHMM[SS]
if (tlen == 12 || tlen == 10) {
struct tm tm;
tm.tm_sec = (tlen == 12 ? twodigits(cp+10, 60) : 0);
tm.tm_min = twodigits(cp+8, 60);
tm.tm_hour = twodigits(cp+6, 24);
tm.tm_mday = twodigits(cp+4, 32);
tm.tm_mon = twodigits(cp+2, 13) - 1;
tm.tm_year = twodigits(cp+0, 100);
/*
* SNPP botched time specifications by not using 4 digits
* to specify a year. This means that we have to guess at
* the intended year when the value is far in the future
* (as opposed to a year in the past that was given by
* mistake). We arbitrarily assume years prior to 1990
* are in the next century and adjust them accordingly.
*/
if (tm.tm_year < 90)
tm.tm_year += 100;
tm.tm_isdst= -1; // XXX not sure about this???
/*
* The above time is assumed to be relative to
* GMT and mktime returns locally adjusted time
* so we need to adjust the result to get things
* in the right timezone. Note that any additional
* timezone correction factor specified by the
* client will then be applied to this result.
*/
result = mktime(&tm) - gmtoff;
return (true);
}
syntaxError(fxStr::format(
"bad time specification (expecting 10/12 digits, got %u)", tlen));
}
return (false);
}
void
SNPPServer::syntaxError(const char* msg)
{
const char* cp = strchr(cbuf, '\0');
if (cp[-1] == '\n')
cp--;
reply(500, "'%.*s': Syntax error, %s.", cp-cbuf, cbuf, msg);
}
/*
* Command support methods.
*/
/*
* Process a multi-line text message.
*/
void
SNPPServer::dataCmd(void)
{
if (!haveText) {
fxStr emsg;
u_int seqnum = getDocumentNumbers(1, emsg);
if (seqnum == (u_int) -1) {
reply(554, "%s", (const char*)emsg);
return;
}
msgFile = fxStr::format("/%s/doc%u.page", FAX_TMPDIR, seqnum);
FILE* fout = Sys::fopen(msgFile, "w");
if (fout != NULL) {
setFileOwner(msgFile);
FileCache::chmod(msgFile, 0660); // sync cache
tempFiles.append(msgFile);
reply(354, "Begin message input; end with <CRLF>'.'<CRLF>.");
char buf[1024];
u_int len = 0;
for (;;) {
if (getCmdLine(buf, sizeof (buf), true)) {
const char* bp = buf;
if (bp[0] == '.') {
if ((bp[1] == '\n' && bp[2] == '\0') || bp[1] == '\0')
break;
if (bp[1] == '.' && bp[2] == '\0') // .. -> .
bp++;
}
u_int blen = strlen(bp);
if ((len += blen) > maxMsgLength) {
reply(550,
"Error, message too long; max %u characters.",
maxMsgLength);
(void) fclose(fout);
Sys::unlink(msgFile);
return;
}
// if buf only contains .., we skipped the first .
// hence we must write bp, not buf. also blen is
// the length of bp, not buf.
(void) fwrite((const char*) bp, blen, 1, fout);
}
}
if (fclose(fout)) {
perror_reply(554, msgFile, errno);
Sys::unlink(msgFile);
} else {
haveText = true;
reply(250, "Message text OK.");
}
} else
perror_reply(554, msgFile, errno);
} else
reply(503, "Error, message already entered.");
}
/*
* Provide help. We cannot share the base class
* implementation of this command because SNPP
* defines a different style for responses (sigh).
*/
void
SNPPServer::helpCmd(const tab* ctab, const char* s)
{
const char* type;
u_int NCMDS;
if (ctab == sitetab) {
type = "SITE ";
NCMDS = N(sitetab);
} else {
type = "";
NCMDS = N(cmdtab);
}
int width = 0;
const tab* c = ctab;
for (u_int n = NCMDS; n != 0; c++, n--) {
int len = strlen(c->name);
if (len > width)
width = len;
}
width = (width + 8) &~ 7;
if (s == NULL) {
reply(214, "The following %scommands are recognized %s.",
type, "(* =>'s unimplemented)");
int columns = 76 / width;
if (columns == 0)
columns = 1;
int lines = (NCMDS + columns - 1) / columns;
for (int i = 0; i < lines; i++) {
printf("214 ");
for (int j = 0; j < columns; j++) {
c = &ctab[j*lines + i];
printf("%s%c", c->name, !c->implemented ? '*' : ' ');
if (c + lines >= &ctab[NCMDS])
break;
int w = strlen(c->name) + 1;
while (w < width) {
putchar(' ');
w++;
}
}
printf("\r\n");
}
(void) fflush(stdout);
reply(250, "Direct comments to %s.", (const char*) faxContact);
} else {
c = lookup(ctab, NCMDS, s);
if (c == NULL)
reply(550, "Unknown command %s.", s);
else if (c->implemented)
reply(218, "Syntax: %s%s %s", type, c->name, c->help);
else
reply(218, "%s%-*s\t%s; unimplemented.",
type, width, c->name, c->help);
}
}
/*
* Specify the hold time (time to send) for a request.
*/
void
SNPPServer::holdCmd(time_t when)
{
time_t now = Sys::now();
if (when > now) {
defJob.tts = when;
const struct tm* tm = cvtTime(defJob.tts);
reply(250, "Message will be processed at %02d%02d%02d%02d%02d."
, tm->tm_year
, tm->tm_mon+1
, tm->tm_mday
, tm->tm_hour
, tm->tm_min
);
} else
reply(550, "Invalid delivery date/time; time in the past.");
}
/*
* Login as the specified user.
*/
void
SNPPServer::loginCmd(const char* loginID, const char* pass)
{
if (IS(LOGGEDIN))
end_login();
the_user = loginID;
state &= ~S_PRIVILEGED;
adminwd = "*"; // make sure no admin privileges
passwd = "*"; // just in case...
if (checkUser(loginID)) {
if (passwd != "") {
if (pass[0] == '\0' || !streq(crypt(pass, passwd), passwd)) {
if (++loginAttempts >= maxLoginAttempts) {
reply(421, "Login incorrect (closing connection).");
logNotice("Repeated SNPP login failures for user %s from %s [%s]"
, (const char*) the_user
, (const char*) remotehost
, (const char*) remoteaddr
);
dologout(0);
}
reply(550, "Login incorrect.");
logInfo("SNPP login failed from %s [%s], %s"
, (const char*) remotehost
, (const char*) remoteaddr
, (const char*) the_user
);
return;
}
}
login();
} else {
if (++loginAttempts >= maxLoginAttempts) {
reply(421, "Login incorrect (closing connection).");
logNotice("Repeated SNPP login failures for user %s from %s [%s]"
, (const char*) the_user
, (const char*) remotehost
, (const char*) remoteaddr
);
dologout(0);
} else {
reply(421, "User %s access denied.", (const char*) the_user);
logNotice("SNPP LOGIN REFUSED (%s) FROM %s [%s], %s"
, "user denied"
, (const char*) remotehost
, (const char*) remoteaddr
, (const char*) the_user
);
}
}
}
/*
* Specify a one-line message text.
*/
void
SNPPServer::messageCmd(const char* msg)
{
if (!haveText) {
u_int len = strlen(msg);
if (len > maxMsgLength) {
reply(550,
"Error, message too long; no more than %u characters accepted.",
maxMsgLength);
return;
}
fxStr emsg;
u_int seqnum = getDocumentNumbers(1, emsg);
if (seqnum == (u_int) -1) {
reply(554, "%s", (const char*)emsg);
return;
}
msgFile = fxStr::format("/%s/doc%u.page", FAX_TMPDIR, seqnum);
FILE* fout = Sys::fopen(msgFile, "w");
if (fout != NULL) {
setFileOwner(msgFile);
FileCache::chmod(msgFile, 0660); // sync cache
tempFiles.append(msgFile);
(void) fwrite(msg, len, 1, fout);
if (fclose(fout)) {
perror_reply(554, msgFile, errno);
Sys::unlink(msgFile);
} else {
haveText = true;
reply(250, "Message text OK.");
}
} else
perror_reply(554, msgFile, errno);
} else
reply(503, "Error, message already entered.");
}
/*
* Process a PAGE command. Map the client-specified pager
* identification string to a service provider phone number
* and destination PIN and create a new job for this request.
*/
void
SNPPServer::pagerCmd(const char* pagerID, const char* pin)
{
/*
* Lookup pager ID and map to a service provider
* and, optionally, PIN.
*/
fxStr provider;
fxStr PIN;
fxStr emsg;
if (!mapPagerID(pagerID, provider, PIN, emsg)) {
reply(550, "%s.", (const char*) emsg);
return;
}
/*
* RFC 1861 says we should lock the Level, Coverage,
* Holdtime, and Alert values for the request at this point.
* To do this we create a job (inheriting the current state
* from the default job) and fill in any other information.
* However we do not submit it until later (when a SEND
* request is made).
*/
curJob = &defJob; // inherit from default job
// XXX merge requests to same provider (maybe?)
if (newJob(emsg) && updateJobOnDisk(*curJob, emsg)) {
fxStr file("/" | curJob->qfile);
setFileOwner(file); // force ownership
FileCache::chmod(file, 0660); // sync cache
curJob->lastmod = Sys::now(); // noone else should update
curJob->number = provider; // destination phone number
if (!pin) // use mapped value
pin = PIN;
curJob->requests.append(faxRequest(FaxRequest::send_page, 0, "", pin));
curJob->requests.append(
faxRequest(FaxRequest::send_page_saved, 0, "", pin));
reply(250, "Pager ID accepted; provider: %s pin: %s jobid: %s."
, (const char*) provider
, pin
, (const char*) curJob->jobid
);
msgs.append(curJob->jobid);
} else
reply(554, "%s.", (const char*) emsg);
initSNPPJob(); // reset job-related state
}
/*
* Validate a client-specified pager ID string.
* This is only sort of like the intended usage
* but is the only thing that makes sense in
* our environment (where the provider is not
* directly accessible).
*/
void
SNPPServer::pingCmd(const char* pagerID)
{
/*
* Lookup pager ID and map to a service provider
* and, optionally, PIN.
*/
fxStr provider;
fxStr PIN;
fxStr emsg;
if (mapPagerID(pagerID, provider, PIN, emsg))
reply(821, "Valid pager ID, no location information available.");
else
reply(550, "%s.", (const char*) emsg);
}
static bool
notPresent(faxRequestArray& a, const char* name)
{
for (u_int i = 0, n = a.length(); i < n; i++)
if (a[i].op == FaxRequest::send_data && a[i].item == name)
return (false);
return (true);
}
/*
* Send (submit) a pager request. We complete the
* formulation of the job and submit it to the
* scheduler. If this job is marked for no queueing
* then we also wait around for the job to complete.
*/
void
SNPPServer::sendCmd(void)
{
if (msgs.length() == 0) {
reply(503, "Error, no pager ID specified with PAGE.");
return;
}
/*
* If we need to wait for jobs to complete, construct
* and register a trigger now before we submit the jobs.
*/
fxStr emsg;
u_int i, n = msgs.length();
bool waitForJobs = false;
for (i = 0; i < n; i++) {
Job* job = findJob(msgs[i], emsg);
if (!job)
msgs.remove(i), n--;
else if (!job->queued)
waitForJobs = true;
}
if (waitForJobs) {
state &= ~S_LOGTRIG; // just process events
if (!newTrigger(emsg, "J%04x", 1<<Trigger::JOB_DEAD)) {
reply(550,
"Cannot register trigger to wait for job completion: %s.",
(const char*) emsg);
return;
}
}
const char* docname = msgFile;
const char* cp = strrchr(docname, '/');
if (!cp) // relative name, e.g. doc123
cp = docname;
for (i = 0; i < n; i++) {
Job* job = findJob(msgs[i], emsg);
if (!job) {
msgs.remove(i), n--;
continue;
}
if (*cp != '\0') {
/*
* Add a reference to the message text for
* the current job, if not already present.
*/
fxStr document =
fxStr::format("/" FAX_DOCDIR "%s.", cp) | job->jobid;
if (notPresent(job->requests, &document[1])) {
if (Sys::link(docname, document) < 0) {
reply(554, "Unable to link document %s to %s: %s.",
docname, (const char*) document, strerror(errno));
return;
}
job->requests.append(
faxRequest(FaxRequest::send_data, 0, "", &document[1]));
}
}
/*
* Submit the job for scheduling.
*/
if (job->mailaddr == "")
replyBadJob(*job, T_NOTIFYADDR);
else if (job->sender == "")
replyBadJob(*job, T_FROM_USER);
else if (job->modem == "")
replyBadJob(*job, T_MODEM);
else if (job->client == "")
replyBadJob(*job, T_CLIENT);
else {
if (job->external == "")
job->external = job->number;
if (job->tts == 0)
job->tts = Sys::now();
job->killtime += job->tts; // adjust based on any hold time
if (updateJobOnDisk(*job, emsg)) {
const char* jobid = job->jobid;
/*
* NB: we don't mark the lastmod time for the
* job since the scheduler should re-write the
* queue file to reflect what it did with it
* (e.g. what state it placed the job in).
*/
if (sendQueuerACK(emsg, "S%s", jobid))
continue;
reply(554, "Failed to submit message %s: %s.",
jobid, (const char*) emsg);
} else
reply(554, "%s.", (const char*) emsg);
}
if (waitForJobs) { // cleanup trigger on error
cancelTrigger(emsg);
/*
* Not sure what to do here. If some jobs got
* submitted then we want to remove them so the
* client can just reissue SEND if the error was
* transient (e.g. faxq was temporarily stopped).
* However we don't track which jobs got started
* and which did not so for now we'll just leave
* everything so the client can resubmit things
* with a subsequent SEND. Unfortunately this
* can result in duplicate pages being sent.
*/
}
return; // failure
}
if (waitForJobs) { // no queueing, wait for submitted jobs
if (setjmp(urgcatch) == 0) {
Dispatcher& disp = Dispatcher::instance();
state |= S_WAITTRIG|S_SENDWAIT;
bool jobsPending;
do {
disp.dispatch();
/*
* The trigger event handlers update our notion
* of the job state asynchronously so we can just
* monitor the job state(s) after each event we
* receive.
*/
jobsPending = false;
for (i = 0; i < n; i++) {
Job* job = findJob(msgs[i], emsg);
if (!job)
msgs.remove(i), n--;
else if (!job->queued &&
job->state != FaxRequest::state_done &&
job->state != FaxRequest::state_failed)
jobsPending = true;
}
} while (IS(WAITTRIG) && jobsPending);
reply(250, "Message processing completed.");
}
state &= ~(S_WAITTRIG|S_SENDWAIT);
(void) cancelTrigger(emsg);
} else // jobs queued, just acknowledge
reply(250, "Message%s succesfully queued.",
msgs.length() > 1 ? "s" : "");
resetState(); // reset SEND-related state
}
/*
* Set the message service level. We currently use
* this just to select a scheduling priority and
* job expiration time.
*/
void
SNPPServer::serviceLevel(u_int level)
{
if (level <= 11) {
defJob.usrpri = priMap[level];
defJob.killtime = 60*killMap[level];
defJob.retrytime = retryMap[level];
reply(250, "OK, service level %u accepted.", level);
} else
reply(550, "Invalid service level %u; we only handle 0-11.", level);
}
/*
* Return server status.
*/
void
SNPPServer::statusCmd(void)
{
reply(214, "%s SNPP server status:", (const char*) hostname);
reply(214, " %s", version);
if (!isdigit(remotehost[0]))
reply(214, " Connected to %s (%s).",
(const char*) remotehost, (const char*) remoteaddr);
else
reply(214, " Connected to %s.", (const char*) remotehost);
if (IS(LOGGEDIN)) {
reply(214, " Logged in as user %s (uid %u)."
, (const char*) the_user
, uid
);
} else
reply(214, " Waiting for login.");
reply(214, " Idle timeout set to %d seconds.", idleTimeout);
if (discTime > 0)
reply(214, " Server scheduled to be unavailable at %.24s.",
asctime(cvtTime(discTime)));
else
reply(214, " No server down time currently scheduled.");
reply(214, " HylaFAX scheduler reached at %s (%sconnected)."
, (const char*) faxqFIFOName
, faxqFd == -1 ? "not " : ""
);
if (clientFd != -1)
reply(214, " Server FIFO is /%s (%sopen)."
, (const char*) clientFIFOName
, clientFd == -1 ? "not " : ""
);
if (IS(WAITFIFO))
reply(214, " Waiting for response from HylaFAX scheduler.");
if (msgs.length() > 0) {
reply(214, " %u message%s prepared for transmission.",
msgs.length(), msgs.length() > 1 ? "s" : "");
// XXX dump status of msgs
} else
reply(214, " No messages prepared for transmission.");
reply(214, " %s message text.", haveText ? "Received" : "No received");
reply(250, "End of status");
}
/*
* Set the subject for outgoing messages.
* For now we just use it to tag the jobs.
*/
void
SNPPServer::subjectCmd(const char* subj)
{
defJob.jobtag = subj; // XXX
reply(250, "Message subject OK.");
}
/*
* Configuration support.
*/
void
SNPPServer::resetConfig()
{
InetFaxServer::resetConfig();
setupConfig();
}
void
SNPPServer::setupConfig()
{
setConfigItem("maxmsglength", "128");
setConfigItem("pageridmapfile","/etc/pagermap");
setConfigItem("prioritymap",
"63 127 127 127 127 127 127 127 127 127 127 127");
setConfigItem("killtimemap",
" 5 5 5 15 60 240 720 1440 1440 1440 1440 1440");
setConfigItem("retrytimemap",
"30 60 60 180 0 0 0 0 0 0 0 0");
}
static void
setShortMap(u_short map[12], const char* value)
{
char* cp;
for (int i = 0; i < 12; i++) {
map[i] = (u_short) strtoul(value, &cp, 0);
if (!cp && *cp == '\0')
break;
value = cp;
}
}
static void
setTimeMap(time_t map[12], const char* value)
{
char* cp;
for (int i = 0; i < 12; i++) {
map[i] = (time_t) strtoul(value, &cp, 0);
if (!cp && *cp == '\0')
break;
value = cp;
}
}
bool
SNPPServer::setConfigItem(const char* tag, const char* value)
{
if (streq(tag, "maxmsglength")) {
maxMsgLength = getNumber(value);
} else if (streq(tag, "pageridmapfile")) {
pagerIDMapFile = value;
} else if (streq(tag, "prioritymap")) {
setShortMap(priMap, value);
} else if (streq(tag, "killtimemap")) {
setTimeMap(killMap, value);
} else if (streq(tag, "retrytimemap")) {
setTimeMap(retryMap, value);
} else if (!InetFaxServer::setConfigItem(tag, value))
return (false);
return (true);
}
#endif /* SNPP_SUPPORT */
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