/* Returns TRUE if we are done */
int parser(struct protstream *sieved_out, struct protstream *sieved_in)
{
int token = EOL;
const char *error_msg = "Generic Error";
struct buf mechanism_name = BUF_INITIALIZER;
struct buf initial_challenge = BUF_INITIALIZER;
struct buf sieve_name = BUF_INITIALIZER;
struct buf sieve_data = BUF_INITIALIZER;
unsigned long num;
int ret = FALSE;
/* get one token from the lexer */
while(token == EOL)
token = timlex(NULL, NULL, sieved_in);
if (!authenticated && (token > 255) && (token!=AUTHENTICATE) &&
(token!=LOGOUT) && (token!=CAPABILITY) &&
(token!=NOOP) && (token!=CHECKSCRIPT) &&
(!tls_enabled() || (token!=STARTTLS)))
{
error_msg = "Authenticate first";
if (token!=EOL)
lex_setrecovering();
goto error;
}
if (verify_only && (token > 255) && (token!=CHECKSCRIPT)
&& (token!=PUTSCRIPT) && (token!=LOGOUT))
{
error_msg = "Script verification only";
if (token!=EOL)
lex_setrecovering();
goto error;
}
switch (token)
{
case EOF:
/* timlex() will return EOF when the remote disconnects badly */
syslog(LOG_WARNING, "Lost connection to client -- exiting");
prot_printf(sieved_out, "BYE \"Shutdown TCP timeout\"\r\n");
ret = TRUE;
goto done;
break;
case AUTHENTICATE:
if (sieved_tls_required) {
error_msg = "AUTHENTICATE only available under a layer";
goto error;
}
if (timlex(NULL, NULL, sieved_in)!=SPACE)
{
error_msg = "SPACE must occur after AUTHENTICATE";
goto error;
}
if (timlex(&mechanism_name, NULL, sieved_in)!=STRING)
{
error_msg = "Did not specify mechanism name";
goto error;
}
token = timlex(NULL, NULL, sieved_in);
if (token != EOL)
{
/* optional client first challenge */
if (token!=SPACE)
{
error_msg = "Expected SPACE";
goto error;
}
if (timlex(&initial_challenge, NULL, sieved_in)!=STRING)
{
error_msg = "Expected string";
goto error;
}
token = timlex(NULL, NULL, sieved_in);
}
if (token != EOL)
{
error_msg = "Expected EOL";
goto error;
}
if (authenticated)
prot_printf(sieved_out, "NO \"Already authenticated\"\r\n");
else if (cmd_authenticate(sieved_out, sieved_in, mechanism_name.s,
&initial_challenge, &error_msg)==FALSE)
{
error_msg = "Authentication Error";
goto error;
}
#if 0 /* XXX - not implemented in sieveshell*/
/* referral_host is non-null only once we are authenticated */
if(referral_host)
goto do_referral;
#endif
break;
case CAPABILITY:
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
if(referral_host)
goto do_referral;
capabilities(sieved_out, sieved_saslconn, starttls_done, authenticated,
sasl_ssf);
break;
case CHECKSCRIPT:
if (timlex(NULL, NULL, sieved_in)!=SPACE)
{
error_msg = "SPACE must occur after CHECKSCRIPT";
goto error;
}
if (timlex(&sieve_data, NULL, sieved_in)!=STRING)
{
error_msg = "Expected script content as second parameter";
goto error;
}
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
/* f stands for "f"aked name, it could be any valid script name */
buf_reset(&sieve_name);
buf_appendcstr(&sieve_name, "f");
putscript(sieved_out, &sieve_name, &sieve_data, /* verify_only */ 1);
break;
case HAVESPACE:
if (timlex(NULL, NULL, sieved_in)!=SPACE)
{
error_msg = "SPACE must occur after HAVESPACE";
goto error;
}
if (timlex(&sieve_name, NULL, sieved_in)!=STRING)
{
error_msg = "Did not specify script name";
goto error;
}
if (timlex(NULL, NULL, sieved_in)!=SPACE)
{
error_msg = "Expected SPACE after SCRIPTNAME";
goto error;
}
if (timlex(NULL, &num, sieved_in)!=NUMBER)
{
error_msg = "Expected Number";
goto error;
}
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
if(referral_host)
goto do_referral;
cmd_havespace(sieved_out, &sieve_name, num);
break;
case LOGOUT:
token = timlex(NULL, NULL, sieved_in);
/* timlex() will return LOGOUT when the remote disconnects badly */
if (token!=EOL && token!=EOF && token!=LOGOUT)
{
error_msg = "Garbage after logout command";
goto error;
}
/* no referral for logout */
cmd_logout(sieved_out, sieved_in);
ret = TRUE;
goto done;
break;
case GETSCRIPT:
if (timlex(NULL, NULL, sieved_in)!=SPACE)
{
error_msg = "SPACE must occur after GETSCRIPT";
goto error;
}
if (timlex(&sieve_name, NULL, sieved_in)!=STRING)
{
error_msg = "Did not specify script name";
goto error;
}
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
if(referral_host)
goto do_referral;
getscript(sieved_out, &sieve_name);
break;
case PUTSCRIPT:
if (timlex(NULL, NULL, sieved_in)!=SPACE)
{
error_msg = "SPACE must occur after PUTSCRIPT";
goto error;
}
if (timlex(&sieve_name, NULL, sieved_in)!=STRING)
{
error_msg = "Did not specify script name";
goto error;
}
if (timlex(NULL, NULL, sieved_in)!=SPACE)
{
error_msg = "Expected SPACE";
goto error;
}
if (timlex(&sieve_data, NULL, sieved_in)!=STRING)
{
error_msg = "Did not specify legal script data length";
goto error;
}
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
if(referral_host)
goto do_referral;
putscript(sieved_out, &sieve_name, &sieve_data, verify_only);
break;
case SETACTIVE:
if (timlex(NULL, NULL, sieved_in)!=SPACE)
{
error_msg = "SPACE must occur after SETACTIVE";
goto error;
}
if (timlex(&sieve_name, NULL, sieved_in)!=STRING)
{
error_msg = "Did not specify script name";
goto error;
}
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
if(referral_host)
goto do_referral;
setactive(sieved_out, &sieve_name);
break;
case DELETESCRIPT:
if (timlex(NULL, NULL, sieved_in)!=SPACE)
{
error_msg = "SPACE must occur after DELETESCRIPT";
goto error;
}
if (timlex(&sieve_name, NULL, sieved_in)!=STRING)
{
error_msg = "Did not specify script name";
goto error;
}
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
if(referral_host)
goto do_referral;
deletescript(sieved_out, &sieve_name);
break;
case LISTSCRIPTS:
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
if(referral_host)
goto do_referral;
listscripts(sieved_out);
break;
case STARTTLS:
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
/* XXX discard any input pipelined after STARTTLS */
prot_flush(sieved_in);
if(referral_host)
goto do_referral;
cmd_starttls(sieved_out, sieved_in);
break;
case NOOP:
token = timlex(NULL, NULL, sieved_in);
if (token != EOL)
{
/* optional string parameter */
if (token!=SPACE)
{
error_msg = "Expected SPACE";
goto error;
}
if (timlex(&sieve_name, NULL, sieved_in)!=STRING)
{
error_msg = "Expected string";
goto error;
}
token = timlex(NULL, NULL, sieved_in);
}
if (token != EOL)
{
error_msg = "Expected EOL";
goto error;
}
if (sieve_name.len) {
prot_printf(sieved_out, "OK (TAG ");
prot_printliteral(sieved_out, sieve_name.s, sieve_name.len);
prot_printf(sieved_out, ") \"Done\"\r\n");
} else
prot_printf(sieved_out, "OK \"Done\"\r\n");
break;
case UNAUTHENTICATE:
if (timlex(NULL, NULL, sieved_in)!=EOL)
{
error_msg = "Expected EOL";
goto error;
}
cmd_unauthenticate(sieved_out, sieved_in);
break;
default:
error_msg="Expected a command. Got something else.";
goto error;
break;
}
done:
/* free memory */
buf_free(&mechanism_name);
buf_free(&initial_challenge);
buf_free(&sieve_name);
buf_free(&sieve_data);
prot_flush(sieved_out);
return ret;
error:
/* free memory */
buf_free(&mechanism_name);
buf_free(&initial_challenge);
buf_free(&sieve_name);
buf_free(&sieve_data);
prot_printf(sieved_out, "NO \"%s\"\r\n",error_msg);
prot_flush(sieved_out);
return FALSE;
do_referral:
{
char buf[4096];
char *c;
/* Truncate the hostname if necessary */
strlcpy(buf, referral_host, sizeof(buf));
c = strchr(buf, '!');
if(c) *c = '\0';
prot_printf(sieved_out, "BYE (REFERRAL \"sieve://%s\") \"Try Remote.\"\r\n",
buf);
ret = TRUE;
goto done;
}
}
EXPORTED void dlist_print(const struct dlist *dl, int printkeys,
struct protstream *out)
{
struct dlist *di;
if (printkeys) {
prot_printastring(out, dl->name);
prot_putc(' ', out);
}
switch (dl->type) {
case DL_NIL:
prot_printf(out, "NIL");
break;
case DL_ATOM:
prot_printastring(out, dl->sval);
break;
case DL_FLAG:
prot_printf(out, "%s", dl->sval);
break;
case DL_NUM:
case DL_DATE: /* for now, we will format it later */
prot_printf(out, "%llu", dl->nval);
break;
case DL_FILE:
printfile(out, dl);
break;
case DL_BUF:
if (strlen(dl->sval) == dl->nval)
prot_printastring(out, dl->sval);
else
prot_printliteral(out, dl->sval, dl->nval);
break;
case DL_GUID:
prot_printf(out, "%s", message_guid_encode(dl->gval));
break;
case DL_HEX:
{
char buf[17];
snprintf(buf, 17, "%016llx", dl->nval);
prot_printf(out, "%s", buf);
}
break;
case DL_KVLIST:
prot_printf(out, "%%(");
for (di = dl->head; di; di = di->next) {
dlist_print(di, 1, out);
if (di->next) {
prot_printf(out, " ");
}
}
prot_printf(out, ")");
break;
case DL_ATOMLIST:
prot_printf(out, "(");
for (di = dl->head; di; di = di->next) {
dlist_print(di, dl->nval, out);
if (di->next)
prot_printf(out, " ");
}
prot_printf(out, ")");
break;
}
}
