2 * Copyright (c) 1999-2004, 2006-2008 Sendmail, Inc. and its suppliers.
5 * By using this file, you agree to the terms and conditions set
6 * forth in the LICENSE file which can be found at the top level of
7 * the sendmail distribution.
12 SM_RCSID("@(#)$Id: engine.c,v 8.167 2011/03/03 06:09:15 ca Exp $")
14 #include "libmilter.h"
16 #if NETINET || NETINET6
17 # include <arpa/inet.h>
18 #endif /* NETINET || NETINET6 */
20 /* generic argument for functions in the command table */
23 size_t a_len; /* length of buffer */
24 char *a_buf; /* argument string */
25 int a_idx; /* index for macro array */
26 SMFICTX_PTR a_ctx; /* context */
29 typedef struct arg_struct genarg;
31 /* structure for commands received from MTA */
34 char cm_cmd; /* command */
35 int cm_argt; /* type of arguments expected */
36 int cm_next; /* next state */
37 int cm_todo; /* what to do next */
38 int cm_macros; /* index for macros */
39 int (*cm_fct) __P((genarg *)); /* function to execute */
42 typedef struct cmdfct_t cmdfct;
44 /* possible values for cm_argt */
45 #define CM_ARG0 0 /* no args */
46 #define CM_ARG1 1 /* one arg (string) */
47 #define CM_ARG2 2 /* two args (strings) */
48 #define CM_ARGA 4 /* one string and _SOCK_ADDR */
49 #define CM_ARGO 5 /* two integers */
50 #define CM_ARGV 8 /* \0 separated list of args, NULL-terminated */
51 #define CM_ARGN 9 /* \0 separated list of args (strings) */
53 /* possible values for cm_todo */
54 #define CT_CONT 0x0000 /* continue reading commands */
55 #define CT_IGNO 0x0001 /* continue even when error */
57 /* not needed right now, done via return code instead */
58 #define CT_KEEP 0x0004 /* keep buffer (contains symbols) */
59 #define CT_END 0x0008 /* last command of session, stop replying */
61 /* index in macro array: macros only for these commands */
70 #define CI_LAST CI_EOH
72 ERROR: do not compile with CI_LAST < CI_DATA
75 ERROR: do not compile with CI_LAST < CI_EOM
78 ERROR: do not compile with CI_LAST < CI_EOH
80 #if CI_LAST < CI_ENVRCPT
81 ERROR: do not compile with CI_LAST < CI_ENVRCPT
83 #if CI_LAST < CI_ENVFROM
84 ERROR: do not compile with CI_LAST < CI_ENVFROM
87 ERROR: do not compile with CI_LAST < CI_HELO
89 #if CI_LAST < CI_CONNECT
90 ERROR: do not compile with CI_LAST < CI_CONNECT
92 #if CI_LAST >= MAX_MACROS_ENTRIES
93 ERROR: do not compile with CI_LAST >= MAX_MACROS_ENTRIES
96 /* function prototypes */
97 static int st_abortfct __P((genarg *));
98 static int st_macros __P((genarg *));
99 static int st_optionneg __P((genarg *));
100 static int st_bodychunk __P((genarg *));
101 static int st_connectinfo __P((genarg *));
102 static int st_bodyend __P((genarg *));
103 static int st_helo __P((genarg *));
104 static int st_header __P((genarg *));
105 static int st_sender __P((genarg *));
106 static int st_rcpt __P((genarg *));
107 static int st_unknown __P((genarg *));
108 static int st_data __P((genarg *));
109 static int st_eoh __P((genarg *));
110 static int st_quit __P((genarg *));
111 static int sendreply __P((sfsistat, socket_t, struct timeval *, SMFICTX_PTR));
112 static void fix_stm __P((SMFICTX_PTR));
113 static bool trans_ok __P((int, int));
114 static char **dec_argv __P((char *, size_t));
115 static int dec_arg2 __P((char *, size_t, char **, char **));
116 static void mi_clr_symlist __P((SMFICTX_PTR));
118 #if _FFR_WORKERS_POOL
119 static bool mi_rd_socket_ready __P((int));
120 #endif /* _FFR_WORKERS_POOL */
124 #define ST_INIT 0 /* initial state */
125 #define ST_OPTS 1 /* option negotiation */
126 #define ST_CONN 2 /* connection info */
127 #define ST_HELO 3 /* helo */
128 #define ST_MAIL 4 /* mail from */
129 #define ST_RCPT 5 /* rcpt to */
130 #define ST_DATA 6 /* data */
131 #define ST_HDRS 7 /* headers */
132 #define ST_EOHS 8 /* end of headers */
133 #define ST_BODY 9 /* body */
134 #define ST_ENDM 10 /* end of message */
135 #define ST_QUIT 11 /* quit */
136 #define ST_ABRT 12 /* abort */
137 #define ST_UNKN 13 /* unknown SMTP command */
138 #define ST_Q_NC 14 /* quit, new connection follows */
139 #define ST_LAST ST_Q_NC /* last valid state */
140 #define ST_SKIP 16 /* not a state but required for the state table */
142 /* in a mail transaction? must be before eom according to spec. */
143 #define ST_IN_MAIL(st) ((st) >= ST_MAIL && (st) < ST_ENDM)
146 ** set of next states
147 ** each state (ST_*) corresponds to bit in an int value (1 << state)
148 ** each state has a set of allowed transitions ('or' of bits of states)
149 ** so a state transition is valid if the mask of the next state
150 ** is set in the NX_* value
151 ** this function is coded in trans_ok(), see below.
154 #define MI_MASK(x) (0x0001 << (x)) /* generate a bit "mask" for a state */
155 #define NX_INIT (MI_MASK(ST_OPTS))
156 #define NX_OPTS (MI_MASK(ST_CONN) | MI_MASK(ST_UNKN))
157 #define NX_CONN (MI_MASK(ST_HELO) | MI_MASK(ST_MAIL) | MI_MASK(ST_UNKN))
158 #define NX_HELO (MI_MASK(ST_HELO) | MI_MASK(ST_MAIL) | MI_MASK(ST_UNKN))
159 #define NX_MAIL (MI_MASK(ST_RCPT) | MI_MASK(ST_ABRT) | MI_MASK(ST_UNKN))
160 #define NX_RCPT (MI_MASK(ST_HDRS) | MI_MASK(ST_EOHS) | MI_MASK(ST_DATA) | \
161 MI_MASK(ST_BODY) | MI_MASK(ST_ENDM) | \
162 MI_MASK(ST_RCPT) | MI_MASK(ST_ABRT) | MI_MASK(ST_UNKN))
163 #define NX_DATA (MI_MASK(ST_EOHS) | MI_MASK(ST_HDRS) | MI_MASK(ST_ABRT))
164 #define NX_HDRS (MI_MASK(ST_EOHS) | MI_MASK(ST_HDRS) | MI_MASK(ST_ABRT))
165 #define NX_EOHS (MI_MASK(ST_BODY) | MI_MASK(ST_ENDM) | MI_MASK(ST_ABRT))
166 #define NX_BODY (MI_MASK(ST_ENDM) | MI_MASK(ST_BODY) | MI_MASK(ST_ABRT))
167 #define NX_ENDM (MI_MASK(ST_QUIT) | MI_MASK(ST_MAIL) | MI_MASK(ST_UNKN) | \
171 #define NX_UNKN (MI_MASK(ST_HELO) | MI_MASK(ST_MAIL) | \
172 MI_MASK(ST_RCPT) | MI_MASK(ST_ABRT) | \
174 MI_MASK(ST_BODY) | MI_MASK(ST_UNKN) | \
175 MI_MASK(ST_ABRT) | MI_MASK(ST_QUIT) | MI_MASK(ST_Q_NC))
176 #define NX_Q_NC (MI_MASK(ST_CONN) | MI_MASK(ST_UNKN))
177 #define NX_SKIP MI_MASK(ST_SKIP)
179 static int next_states[] =
198 #define SIZE_NEXT_STATES (sizeof(next_states) / sizeof(next_states[0]))
200 /* commands received by milter */
201 static cmdfct cmds[] =
203 {SMFIC_ABORT, CM_ARG0, ST_ABRT, CT_CONT, CI_NONE, st_abortfct }
204 , {SMFIC_MACRO, CM_ARGV, ST_NONE, CT_KEEP, CI_NONE, st_macros }
205 , {SMFIC_BODY, CM_ARG1, ST_BODY, CT_CONT, CI_NONE, st_bodychunk }
206 , {SMFIC_CONNECT, CM_ARG2, ST_CONN, CT_CONT, CI_CONN, st_connectinfo }
207 , {SMFIC_BODYEOB, CM_ARG1, ST_ENDM, CT_CONT, CI_EOM, st_bodyend }
208 , {SMFIC_HELO, CM_ARG1, ST_HELO, CT_CONT, CI_HELO, st_helo }
209 , {SMFIC_HEADER, CM_ARG2, ST_HDRS, CT_CONT, CI_NONE, st_header }
210 , {SMFIC_MAIL, CM_ARGV, ST_MAIL, CT_CONT, CI_MAIL, st_sender }
211 , {SMFIC_OPTNEG, CM_ARGO, ST_OPTS, CT_CONT, CI_NONE, st_optionneg }
212 , {SMFIC_EOH, CM_ARG0, ST_EOHS, CT_CONT, CI_EOH, st_eoh }
213 , {SMFIC_QUIT, CM_ARG0, ST_QUIT, CT_END, CI_NONE, st_quit }
214 , {SMFIC_DATA, CM_ARG0, ST_DATA, CT_CONT, CI_DATA, st_data }
215 , {SMFIC_RCPT, CM_ARGV, ST_RCPT, CT_IGNO, CI_RCPT, st_rcpt }
216 , {SMFIC_UNKNOWN, CM_ARG1, ST_UNKN, CT_IGNO, CI_NONE, st_unknown }
217 , {SMFIC_QUIT_NC, CM_ARG0, ST_Q_NC, CT_CONT, CI_NONE, st_quit }
221 ** Additional (internal) reply codes;
222 ** must be coordinated wit libmilter/mfapi.h
225 #define _SMFIS_KEEP 20
226 #define _SMFIS_ABORT 21
227 #define _SMFIS_OPTIONS 22
228 #define _SMFIS_NOREPLY SMFIS_NOREPLY
229 #define _SMFIS_FAIL (-1)
230 #define _SMFIS_NONE (-2)
233 ** MI_ENGINE -- receive commands and process them
236 ** ctx -- context structure
239 ** MI_FAILURE/MI_SUCCESS
249 int ret = MI_SUCCESS;
250 int ncmds = sizeof(cmds) / sizeof(cmdfct);
251 int curstate = ST_INIT;
258 struct timeval timeout;
259 int (*f) __P((genarg *));
260 sfsistat (*fi_abort) __P((SMFICTX *));
261 sfsistat (*fi_close) __P((SMFICTX *));
265 fi_abort = ctx->ctx_smfi->xxfi_abort;
266 #if _FFR_WORKERS_POOL
267 curstate = ctx->ctx_state;
268 if (curstate == ST_INIT)
270 mi_clr_macros(ctx, 0);
273 #else /* _FFR_WORKERS_POOL */
274 mi_clr_macros(ctx, 0);
276 #endif /* _FFR_WORKERS_POOL */
280 /* call abort only if in a mail transaction */
281 call_abort = ST_IN_MAIL(curstate);
282 timeout.tv_sec = ctx->ctx_timeout;
284 if (mi_stop() == MILTER_ABRT)
286 if (ctx->ctx_dbg > 3)
287 sm_dprintf("[%lu] milter_abort\n",
294 ** Notice: buf is allocated by mi_rd_cmd() and it will
295 ** usually be free()d after it has been used in f().
296 ** However, if the function returns _SMFIS_KEEP then buf
297 ** contains macros and will not be free()d.
298 ** Hence r must be set to _SMFIS_NONE if a new buf is
299 ** allocated to avoid problem with housekeeping, esp.
300 ** if the code "break"s out of the loop.
303 #if _FFR_WORKERS_POOL
304 /* Is the socket ready to be read ??? */
305 if (!mi_rd_socket_ready(sd))
310 #endif /* _FFR_WORKERS_POOL */
313 if ((buf = mi_rd_cmd(sd, &timeout, &cmd, &len,
314 ctx->ctx_smfi->xxfi_name)) == NULL &&
315 cmd < SMFIC_VALIDCMD)
317 if (ctx->ctx_dbg > 5)
318 sm_dprintf("[%lu] mi_engine: mi_rd_cmd error (%x)\n",
319 (long) ctx->ctx_id, (int) cmd);
322 ** eof is currently treated as failure ->
323 ** abort() instead of close(), otherwise use:
324 ** if (cmd != SMFIC_EOF)
330 if (ctx->ctx_dbg > 4)
331 sm_dprintf("[%lu] got cmd '%c' len %d\n",
332 (long) ctx->ctx_id, cmd, (int) len);
333 for (i = 0; i < ncmds; i++)
335 if (cmd == cmds[i].cm_cmd)
340 /* unknown command */
341 if (ctx->ctx_dbg > 1)
342 sm_dprintf("[%lu] cmd '%c' unknown\n",
343 (long) ctx->ctx_id, cmd);
347 if ((f = cmds[i].cm_fct) == NULL)
350 if (ctx->ctx_dbg > 1)
351 sm_dprintf("[%lu] cmd '%c' not impl\n",
352 (long) ctx->ctx_id, cmd);
357 /* is new state ok? */
358 newstate = cmds[i].cm_next;
359 if (ctx->ctx_dbg > 5)
360 sm_dprintf("[%lu] cur %x new %x nextmask %x\n",
362 curstate, newstate, next_states[curstate]);
364 if (newstate != ST_NONE && !trans_ok(curstate, newstate))
366 if (ctx->ctx_dbg > 1)
367 sm_dprintf("[%lu] abort: cur %d (%x) new %d (%x) next %x\n",
369 curstate, MI_MASK(curstate),
370 newstate, MI_MASK(newstate),
371 next_states[curstate]);
373 /* call abort only if in a mail transaction */
374 if (fi_abort != NULL && call_abort)
375 (void) (*fi_abort)(ctx);
378 ** try to reach the new state from HELO
379 ** if it can't be reached, ignore the command.
383 if (!trans_ok(curstate, newstate))
395 if (newstate != ST_NONE)
398 ctx->ctx_state = curstate;
400 arg.a_idx = cmds[i].cm_macros;
401 call_abort = ST_IN_MAIL(curstate);
403 /* call function to deal with command */
404 MI_MONITOR_BEGIN(ctx, cmd);
406 MI_MONITOR_END(ctx, cmd);
407 if (r != _SMFIS_KEEP && buf != NULL)
412 if (sendreply(r, sd, &timeout, ctx) != MI_SUCCESS)
418 if (r == SMFIS_ACCEPT)
420 /* accept mail, no further actions taken */
423 else if (r == SMFIS_REJECT || r == SMFIS_DISCARD ||
427 ** further actions depend on current state
428 ** if the IGNO bit is set: "ignore" the error,
429 ** i.e., stay in the current state
431 if (!bitset(CT_IGNO, cmds[i].cm_todo))
434 else if (r == _SMFIS_ABORT)
436 if (ctx->ctx_dbg > 5)
437 sm_dprintf("[%lu] function returned abort\n",
442 } while (!bitset(CT_END, cmds[i].cm_todo));
444 ctx->ctx_state = curstate;
446 if (ret == MI_FAILURE)
448 /* call abort only if in a mail transaction */
449 if (fi_abort != NULL && call_abort)
450 (void) (*fi_abort)(ctx);
453 /* has close been called? */
454 if (ctx->ctx_state != ST_QUIT
455 #if _FFR_WORKERS_POOL
456 && ret != MI_CONTINUE
457 #endif /* _FFR_WORKERS_POOL */
460 if ((fi_close = ctx->ctx_smfi->xxfi_close) != NULL)
461 (void) (*fi_close)(ctx);
463 if (r != _SMFIS_KEEP && buf != NULL)
465 #if !_FFR_WORKERS_POOL
466 mi_clr_macros(ctx, 0);
467 #endif /* _FFR_WORKERS_POOL */
471 static size_t milter_addsymlist __P((SMFICTX_PTR, char *, char **));
474 milter_addsymlist(ctx, buf, newbuf)
484 SM_ASSERT(ctx != NULL);
485 SM_ASSERT(buf != NULL);
486 SM_ASSERT(newbuf != NULL);
488 for (i = 0; i < MAX_MACROS_ENTRIES; i++)
490 if (ctx->ctx_mac_list[i] != NULL)
492 len += strlen(ctx->ctx_mac_list[i]) + 1 +
500 SM_ASSERT(len + MILTER_OPTLEN > len);
501 len += MILTER_OPTLEN;
502 buffer = malloc(len);
505 (void) memcpy(buffer, buf, MILTER_OPTLEN);
506 offset = MILTER_OPTLEN;
507 for (i = 0; i < MAX_MACROS_ENTRIES; i++)
511 if (ctx->ctx_mac_list[i] == NULL)
514 SM_ASSERT(offset + MILTER_LEN_BYTES < len);
516 (void) memcpy(buffer + offset, (void *) &v,
518 offset += MILTER_LEN_BYTES;
519 l = strlen(ctx->ctx_mac_list[i]) + 1;
520 SM_ASSERT(offset + l <= len);
521 (void) memcpy(buffer + offset,
522 ctx->ctx_mac_list[i], l);
541 ** GET_NR_BIT -- get "no reply" bit matching state
544 ** state -- current protocol stage
547 ** 0: no matching bit
548 ** >0: the matching "no reply" bit
551 static unsigned long get_nr_bit __P((int));
596 ** SENDREPLY -- send a reply to the MTA
600 ** sd -- socket descriptor
601 ** timeout_ptr -- (ptr to) timeout to use for sending
602 ** ctx -- context structure
605 ** MI_SUCCESS/MI_FAILURE
609 sendreply(r, sd, timeout_ptr, ctx)
612 struct timeval *timeout_ptr;
620 bit = get_nr_bit(ctx->ctx_state);
621 if (bit != 0 && (ctx->ctx_pflags & bit) != 0 && r != SMFIS_NOREPLY)
623 if (r >= SMFIS_CONTINUE && r < _SMFIS_KEEP)
625 /* milter said it wouldn't reply, but it lied... */
627 "%s: milter claimed not to reply in state %d but did anyway %d\n",
628 ctx->ctx_smfi->xxfi_name,
634 ** Force specified behavior, otherwise libmilter
635 ** and MTA will fail to communicate properly.
655 ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_CONTINUE, NULL, 0);
659 if (ctx->ctx_reply != NULL &&
660 ((r == SMFIS_TEMPFAIL && *ctx->ctx_reply == '4') ||
661 (r == SMFIS_REJECT && *ctx->ctx_reply == '5')))
663 ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_REPLYCODE,
665 strlen(ctx->ctx_reply) + 1);
666 free(ctx->ctx_reply);
667 ctx->ctx_reply = NULL;
671 ret = mi_wr_cmd(sd, timeout_ptr, r == SMFIS_REJECT ?
672 SMFIR_REJECT : SMFIR_TEMPFAIL, NULL, 0);
676 ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_DISCARD, NULL, 0);
679 ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_ACCEPT, NULL, 0);
682 ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_SKIP, NULL, 0);
689 char buf[MILTER_OPTLEN];
691 v = htonl(ctx->ctx_prot_vers2mta);
692 (void) memcpy(&(buf[0]), (void *) &v,
694 v = htonl(ctx->ctx_aflags);
695 (void) memcpy(&(buf[MILTER_LEN_BYTES]), (void *) &v,
697 v = htonl(ctx->ctx_pflags2mta);
698 (void) memcpy(&(buf[MILTER_LEN_BYTES * 2]),
699 (void *) &v, MILTER_LEN_BYTES);
700 len = milter_addsymlist(ctx, buf, &buffer);
702 ret = mi_wr_cmd(sd, timeout_ptr, SMFIC_OPTNEG,
710 (ctx->ctx_pflags & bit) != 0 &&
711 (ctx->ctx_mta_pflags & bit) == 0)
714 ** milter doesn't want to send a reply,
715 ** but the MTA doesn't have that feature: fake it.
718 ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_CONTINUE, NULL,
722 default: /* don't send a reply */
729 ** CLR_MACROS -- clear set of macros starting from a given index
732 ** ctx -- context structure
733 ** m -- index from which to clear all macros
740 mi_clr_macros(ctx, m)
746 for (i = m; i < MAX_MACROS_ENTRIES; i++)
748 if (ctx->ctx_mac_ptr[i] != NULL)
750 free(ctx->ctx_mac_ptr[i]);
751 ctx->ctx_mac_ptr[i] = NULL;
753 if (ctx->ctx_mac_buf[i] != NULL)
755 free(ctx->ctx_mac_buf[i]);
756 ctx->ctx_mac_buf[i] = NULL;
762 ** MI_CLR_SYMLIST -- clear list of macros
765 ** ctx -- context structure
777 SM_ASSERT(ctx != NULL);
778 for (i = SMFIM_FIRST; i <= SMFIM_LAST; i++)
780 if (ctx->ctx_mac_list[i] != NULL)
782 free(ctx->ctx_mac_list[i]);
783 ctx->ctx_mac_list[i] = NULL;
789 ** MI_CLR_CTX -- clear context
792 ** ctx -- context structure
802 SM_ASSERT(ctx != NULL);
803 if (ValidSocket(ctx->ctx_sd))
805 (void) closesocket(ctx->ctx_sd);
806 ctx->ctx_sd = INVALID_SOCKET;
808 if (ctx->ctx_reply != NULL)
810 free(ctx->ctx_reply);
811 ctx->ctx_reply = NULL;
813 if (ctx->ctx_privdata != NULL)
815 smi_log(SMI_LOG_WARN,
816 "%s: private data not NULL",
817 ctx->ctx_smfi->xxfi_name);
819 mi_clr_macros(ctx, 0);
825 ** ST_OPTIONNEG -- negotiate options
828 ** g -- generic argument structure
831 ** abort/send options/continue
838 mi_int32 i, v, fake_pflags, internal_pflags;
840 #if _FFR_MILTER_CHECK
841 bool testmode = false;
842 #endif /* _FFR_MILTER_CHECK */
843 int (*fi_negotiate) __P((SMFICTX *,
844 unsigned long, unsigned long,
845 unsigned long, unsigned long,
846 unsigned long *, unsigned long *,
847 unsigned long *, unsigned long *));
849 if (g == NULL || g->a_ctx->ctx_smfi == NULL)
850 return SMFIS_CONTINUE;
852 mi_clr_macros(ctx, g->a_idx + 1);
853 ctx->ctx_prot_vers = SMFI_PROT_VERSION;
855 /* check for minimum length */
856 if (g->a_len < MILTER_OPTLEN)
859 "%s: st_optionneg[%ld]: len too short %d < %d",
860 ctx->ctx_smfi->xxfi_name,
861 (long) ctx->ctx_id, (int) g->a_len,
866 /* protocol version */
867 (void) memcpy((void *) &i, (void *) &(g->a_buf[0]), MILTER_LEN_BYTES);
870 #define SMFI_PROT_VERSION_MIN 2
872 /* check for minimum version */
873 if (v < SMFI_PROT_VERSION_MIN)
876 "%s: st_optionneg[%ld]: protocol version too old %d < %d",
877 ctx->ctx_smfi->xxfi_name,
878 (long) ctx->ctx_id, v, SMFI_PROT_VERSION_MIN);
881 ctx->ctx_mta_prot_vers = v;
882 if (ctx->ctx_prot_vers < ctx->ctx_mta_prot_vers)
883 ctx->ctx_prot_vers2mta = ctx->ctx_prot_vers;
885 ctx->ctx_prot_vers2mta = ctx->ctx_mta_prot_vers;
887 (void) memcpy((void *) &i, (void *) &(g->a_buf[MILTER_LEN_BYTES]),
891 /* no flags? set to default value for V1 actions */
894 ctx->ctx_mta_aflags = v; /* MTA action flags */
897 (void) memcpy((void *) &i, (void *) &(g->a_buf[MILTER_LEN_BYTES * 2]),
901 /* no flags? set to default value for V1 protocol */
904 #if _FFR_MDS_NEGOTIATE
905 else if (ctx->ctx_smfi->xxfi_version >= SMFI_VERSION_MDS)
908 ** Allow changing the size only if milter is compiled
909 ** against a version that supports this.
910 ** If a milter is dynamically linked against a newer
911 ** libmilter version, we don't want to "surprise"
912 ** it with a larger buffer as it may rely on it
913 ** even though it is not documented as a limit.
916 if (bitset(SMFIP_MDS_1M, v))
918 internal_pflags |= SMFIP_MDS_1M;
919 (void) smfi_setmaxdatasize(MILTER_MDS_1M);
921 else if (bitset(SMFIP_MDS_256K, v))
923 internal_pflags |= SMFIP_MDS_256K;
924 (void) smfi_setmaxdatasize(MILTER_MDS_256K);
928 /* don't log this for now... */
929 else if (ctx->ctx_smfi->xxfi_version < SMFI_VERSION_MDS &&
930 bitset(SMFIP_MDS_1M|SMFIP_MDS_256K, v))
932 smi_log(SMI_LOG_WARN,
933 "%s: st_optionneg[%ld]: milter version=%X, trying flags=%X",
934 ctx->ctx_smfi->xxfi_name,
935 (long) ctx->ctx_id, ctx->ctx_smfi->xxfi_version, v);
938 #endif /* _FFR_MDS_NEGOTIATE */
941 ** MTA protocol flags.
942 ** We pass the internal flags to the milter as "read only",
943 ** i.e., a milter can read them so it knows which size
944 ** will be used, but any changes by a milter will be ignored
945 ** (see below, search for SMFI_INTERNAL).
948 ctx->ctx_mta_pflags = (v & ~SMFI_INTERNAL) | internal_pflags;
951 ** Copy flags from milter struct into libmilter context;
952 ** this variable will be used later on to check whether
953 ** the MTA "actions" can fulfill the milter requirements,
954 ** but it may be overwritten by the negotiate callback.
957 ctx->ctx_aflags = ctx->ctx_smfi->xxfi_flags;
958 fake_pflags = SMFIP_NR_CONN
969 if (g->a_ctx->ctx_smfi != NULL &&
970 g->a_ctx->ctx_smfi->xxfi_version > 4 &&
971 (fi_negotiate = g->a_ctx->ctx_smfi->xxfi_negotiate) != NULL)
974 unsigned long m_aflags, m_pflags, m_f2, m_f3;
977 ** let milter decide whether the features offered by the
978 ** MTA are "good enough".
980 ** - libmilter can "fake" some features (e.g., SMFIP_NR_HDR)
981 ** - m_f2, m_f3 are for future extensions
985 m_aflags = ctx->ctx_mta_aflags;
986 m_pflags = ctx->ctx_pflags;
987 if ((SMFIP_SKIP & ctx->ctx_mta_pflags) != 0)
988 m_pflags |= SMFIP_SKIP;
989 r = fi_negotiate(g->a_ctx,
991 ctx->ctx_mta_pflags|fake_pflags,
993 &m_aflags, &m_pflags, &m_f2, &m_f3);
995 #if _FFR_MILTER_CHECK
996 testmode = bitset(SMFIP_TEST, m_pflags);
998 m_pflags &= ~SMFIP_TEST;
999 #endif /* _FFR_MILTER_CHECK */
1002 ** Types of protocol flags (pflags):
1003 ** 1. do NOT send protocol step X
1004 ** 2. MTA can do/understand something extra (SKIP,
1005 ** send unknown RCPTs)
1006 ** 3. MTA can deal with "no reply" for various protocol steps
1007 ** Note: this mean that it isn't possible to simply set all
1008 ** flags to get "everything":
1009 ** setting a flag of type 1 turns off a step
1010 ** (it should be the other way around:
1011 ** a flag means a protocol step can be sent)
1012 ** setting a flag of type 3 requires that milter
1013 ** never sends a reply for the corresponding step.
1014 ** Summary: the "negation" of protocol flags is causing
1015 ** problems, but at least for type 3 there is no simple
1018 ** What should "all options" mean?
1019 ** send all protocol steps _except_ those for which there is
1020 ** no callback (currently registered in ctx_pflags)
1021 ** expect SKIP as return code? Yes
1022 ** send unknown RCPTs? No,
1023 ** must be explicitly requested?
1024 ** "no reply" for some protocol steps? No,
1025 ** must be explicitly requested.
1028 if (SMFIS_ALL_OPTS == r)
1030 ctx->ctx_aflags = ctx->ctx_mta_aflags;
1031 ctx->ctx_pflags2mta = ctx->ctx_pflags;
1032 if ((SMFIP_SKIP & ctx->ctx_mta_pflags) != 0)
1033 ctx->ctx_pflags2mta |= SMFIP_SKIP;
1035 else if (r != SMFIS_CONTINUE)
1037 smi_log(SMI_LOG_ERR,
1038 "%s: st_optionneg[%ld]: xxfi_negotiate returned %d (protocol options=0x%lx, actions=0x%lx)",
1039 ctx->ctx_smfi->xxfi_name,
1040 (long) ctx->ctx_id, r, ctx->ctx_mta_pflags,
1041 ctx->ctx_mta_aflags);
1042 return _SMFIS_ABORT;
1046 ctx->ctx_aflags = m_aflags;
1047 ctx->ctx_pflags = m_pflags;
1048 ctx->ctx_pflags2mta = m_pflags;
1051 /* check whether some flags need to be "faked" */
1052 i = ctx->ctx_pflags2mta;
1053 if ((ctx->ctx_mta_pflags & i) != i)
1059 ** If some behavior can be faked (set in fake_pflags),
1060 ** but the MTA doesn't support it, then unset
1061 ** that flag in the value that is sent to the MTA.
1064 for (idx = 0; idx < 32; idx++)
1067 if ((ctx->ctx_mta_pflags & b) != b &&
1068 (fake_pflags & b) == b)
1069 ctx->ctx_pflags2mta &= ~b;
1076 ** Set the protocol flags based on the values determined
1077 ** in mi_listener() which checked the defined callbacks.
1080 ctx->ctx_pflags2mta = ctx->ctx_pflags;
1083 /* check whether actions and protocol requirements can be satisfied */
1084 i = ctx->ctx_aflags;
1085 if ((i & ctx->ctx_mta_aflags) != i)
1087 smi_log(SMI_LOG_ERR,
1088 "%s: st_optionneg[%ld]: 0x%lx does not fulfill action requirements 0x%x",
1089 ctx->ctx_smfi->xxfi_name,
1090 (long) ctx->ctx_id, ctx->ctx_mta_aflags, i);
1091 return _SMFIS_ABORT;
1094 i = ctx->ctx_pflags2mta;
1095 if ((ctx->ctx_mta_pflags & i) != i)
1098 ** Older MTAs do not support some protocol steps.
1099 ** As this protocol is a bit "wierd" (it asks for steps
1100 ** NOT to be taken/sent) we have to check whether we
1101 ** should turn off those "negative" requests.
1102 ** Currently these are only SMFIP_NODATA and SMFIP_NOUNKNOWN.
1105 if (bitset(SMFIP_NODATA, ctx->ctx_pflags2mta) &&
1106 !bitset(SMFIP_NODATA, ctx->ctx_mta_pflags))
1107 ctx->ctx_pflags2mta &= ~SMFIP_NODATA;
1108 if (bitset(SMFIP_NOUNKNOWN, ctx->ctx_pflags2mta) &&
1109 !bitset(SMFIP_NOUNKNOWN, ctx->ctx_mta_pflags))
1110 ctx->ctx_pflags2mta &= ~SMFIP_NOUNKNOWN;
1111 i = ctx->ctx_pflags2mta;
1114 if ((ctx->ctx_mta_pflags & i) != i)
1116 smi_log(SMI_LOG_ERR,
1117 "%s: st_optionneg[%ld]: 0x%lx does not fulfill protocol requirements 0x%x",
1118 ctx->ctx_smfi->xxfi_name,
1119 (long) ctx->ctx_id, ctx->ctx_mta_pflags, i);
1120 return _SMFIS_ABORT;
1124 if (ctx->ctx_dbg > 3)
1125 sm_dprintf("[%lu] milter_negotiate:"
1126 " mta_actions=0x%lx, mta_flags=0x%lx"
1127 " actions=0x%lx, flags=0x%lx\n"
1128 , (long) ctx->ctx_id
1129 , ctx->ctx_mta_aflags, ctx->ctx_mta_pflags
1130 , ctx->ctx_aflags, ctx->ctx_pflags);
1132 #if _FFR_MILTER_CHECK
1133 if (ctx->ctx_dbg > 3)
1134 sm_dprintf("[%lu] milter_negotiate:"
1135 " testmode=%d, pflags2mta=%X, internal_pflags=%X\n"
1136 , (long) ctx->ctx_id, testmode
1137 , ctx->ctx_pflags2mta, internal_pflags);
1139 /* in test mode: take flags without further modifications */
1141 /* Warning: check statement below! */
1142 #endif /* _FFR_MILTER_CHECK */
1145 ** Remove the internal flags that might have been set by a milter
1146 ** and set only those determined above.
1149 ctx->ctx_pflags2mta = (ctx->ctx_pflags2mta & ~SMFI_INTERNAL)
1151 return _SMFIS_OPTIONS;
1155 ** ST_CONNECTINFO -- receive connection information
1158 ** g -- generic argument structure
1161 ** continue or filter-specified value
1171 unsigned short port = 0;
1172 _SOCK_ADDR sockaddr;
1173 sfsistat (*fi_connect) __P((SMFICTX *, char *, _SOCK_ADDR *));
1176 return _SMFIS_ABORT;
1177 mi_clr_macros(g->a_ctx, g->a_idx + 1);
1178 if (g->a_ctx->ctx_smfi == NULL ||
1179 (fi_connect = g->a_ctx->ctx_smfi->xxfi_connect) == NULL)
1180 return SMFIS_CONTINUE;
1185 while (s[i] != '\0' && i <= l)
1188 return _SMFIS_ABORT;
1190 /* Move past trailing \0 in host string */
1193 (void) memset(&sockaddr, '\0', sizeof sockaddr);
1194 if (family != SMFIA_UNKNOWN)
1196 if (i + sizeof port >= l)
1198 smi_log(SMI_LOG_ERR,
1199 "%s: connect[%ld]: wrong len %d >= %d",
1200 g->a_ctx->ctx_smfi->xxfi_name,
1201 (long) g->a_ctx->ctx_id, (int) i, (int) l);
1202 return _SMFIS_ABORT;
1204 (void) memcpy((void *) &port, (void *) (s + i),
1208 /* make sure string is terminated */
1209 if (s[l - 1] != '\0')
1210 return _SMFIS_ABORT;
1212 if (family == SMFIA_INET)
1214 if (inet_aton(s + i, (struct in_addr *) &sockaddr.sin.sin_addr)
1217 smi_log(SMI_LOG_ERR,
1218 "%s: connect[%ld]: inet_aton failed",
1219 g->a_ctx->ctx_smfi->xxfi_name,
1220 (long) g->a_ctx->ctx_id);
1221 return _SMFIS_ABORT;
1223 sockaddr.sa.sa_family = AF_INET;
1225 sockaddr.sin.sin_port = port;
1228 # endif /* NETINET */
1230 if (family == SMFIA_INET6)
1232 if (mi_inet_pton(AF_INET6, s + i,
1233 &sockaddr.sin6.sin6_addr) != 1)
1235 smi_log(SMI_LOG_ERR,
1236 "%s: connect[%ld]: mi_inet_pton failed",
1237 g->a_ctx->ctx_smfi->xxfi_name,
1238 (long) g->a_ctx->ctx_id);
1239 return _SMFIS_ABORT;
1241 sockaddr.sa.sa_family = AF_INET6;
1243 sockaddr.sin6.sin6_port = port;
1246 # endif /* NETINET6 */
1248 if (family == SMFIA_UNIX)
1250 if (sm_strlcpy(sockaddr.sunix.sun_path, s + i,
1251 sizeof sockaddr.sunix.sun_path) >=
1252 sizeof sockaddr.sunix.sun_path)
1254 smi_log(SMI_LOG_ERR,
1255 "%s: connect[%ld]: path too long",
1256 g->a_ctx->ctx_smfi->xxfi_name,
1257 (long) g->a_ctx->ctx_id);
1258 return _SMFIS_ABORT;
1260 sockaddr.sunix.sun_family = AF_UNIX;
1263 # endif /* NETUNIX */
1265 smi_log(SMI_LOG_ERR,
1266 "%s: connect[%ld]: unknown family %d",
1267 g->a_ctx->ctx_smfi->xxfi_name,
1268 (long) g->a_ctx->ctx_id, family);
1269 return _SMFIS_ABORT;
1272 return (*fi_connect)(g->a_ctx, g->a_buf,
1273 family != SMFIA_UNKNOWN ? &sockaddr : NULL);
1277 ** ST_EOH -- end of headers
1280 ** g -- generic argument structure
1283 ** continue or filter-specified value
1290 sfsistat (*fi_eoh) __P((SMFICTX *));
1293 return _SMFIS_ABORT;
1294 if (g->a_ctx->ctx_smfi != NULL &&
1295 (fi_eoh = g->a_ctx->ctx_smfi->xxfi_eoh) != NULL)
1296 return (*fi_eoh)(g->a_ctx);
1297 return SMFIS_CONTINUE;
1301 ** ST_DATA -- DATA command
1304 ** g -- generic argument structure
1307 ** continue or filter-specified value
1314 sfsistat (*fi_data) __P((SMFICTX *));
1317 return _SMFIS_ABORT;
1318 if (g->a_ctx->ctx_smfi != NULL &&
1319 g->a_ctx->ctx_smfi->xxfi_version > 3 &&
1320 (fi_data = g->a_ctx->ctx_smfi->xxfi_data) != NULL)
1321 return (*fi_data)(g->a_ctx);
1322 return SMFIS_CONTINUE;
1326 ** ST_HELO -- helo/ehlo command
1329 ** g -- generic argument structure
1332 ** continue or filter-specified value
1339 sfsistat (*fi_helo) __P((SMFICTX *, char *));
1342 return _SMFIS_ABORT;
1343 mi_clr_macros(g->a_ctx, g->a_idx + 1);
1344 if (g->a_ctx->ctx_smfi != NULL &&
1345 (fi_helo = g->a_ctx->ctx_smfi->xxfi_helo) != NULL)
1347 /* paranoia: check for terminating '\0' */
1348 if (g->a_len == 0 || g->a_buf[g->a_len - 1] != '\0')
1350 return (*fi_helo)(g->a_ctx, g->a_buf);
1352 return SMFIS_CONTINUE;
1356 ** ST_HEADER -- header line
1359 ** g -- generic argument structure
1362 ** continue or filter-specified value
1370 sfsistat (*fi_header) __P((SMFICTX *, char *, char *));
1373 return _SMFIS_ABORT;
1374 if (g->a_ctx->ctx_smfi == NULL ||
1375 (fi_header = g->a_ctx->ctx_smfi->xxfi_header) == NULL)
1376 return SMFIS_CONTINUE;
1377 if (dec_arg2(g->a_buf, g->a_len, &hf, &hv) == MI_SUCCESS)
1378 return (*fi_header)(g->a_ctx, hf, hv);
1380 return _SMFIS_ABORT;
1383 #define ARGV_FCT(lf, rf, idx) \
1385 sfsistat (*lf) __P((SMFICTX *, char **)); \
1389 return _SMFIS_ABORT; \
1390 mi_clr_macros(g->a_ctx, g->a_idx + 1); \
1391 if (g->a_ctx->ctx_smfi == NULL || \
1392 (lf = g->a_ctx->ctx_smfi->rf) == NULL) \
1393 return SMFIS_CONTINUE; \
1394 if ((argv = dec_argv(g->a_buf, g->a_len)) == NULL) \
1395 return _SMFIS_ABORT; \
1396 r = (*lf)(g->a_ctx, argv); \
1401 ** ST_SENDER -- MAIL FROM command
1404 ** g -- generic argument structure
1407 ** continue or filter-specified value
1414 ARGV_FCT(fi_envfrom, xxfi_envfrom, CI_MAIL)
1418 ** ST_RCPT -- RCPT TO command
1421 ** g -- generic argument structure
1424 ** continue or filter-specified value
1431 ARGV_FCT(fi_envrcpt, xxfi_envrcpt, CI_RCPT)
1435 ** ST_UNKNOWN -- unrecognized or unimplemented command
1438 ** g -- generic argument structure
1441 ** continue or filter-specified value
1448 sfsistat (*fi_unknown) __P((SMFICTX *, const char *));
1451 return _SMFIS_ABORT;
1452 if (g->a_ctx->ctx_smfi != NULL &&
1453 g->a_ctx->ctx_smfi->xxfi_version > 2 &&
1454 (fi_unknown = g->a_ctx->ctx_smfi->xxfi_unknown) != NULL)
1455 return (*fi_unknown)(g->a_ctx, (const char *) g->a_buf);
1456 return SMFIS_CONTINUE;
1460 ** ST_MACROS -- deal with macros received from the MTA
1463 ** g -- generic argument structure
1469 ** set pointer in macro array to current values.
1479 if (g == NULL || g->a_len < 1)
1481 if ((argv = dec_argv(g->a_buf + 1, g->a_len - 1)) == NULL)
1483 switch (g->a_buf[0])
1510 if (g->a_ctx->ctx_mac_ptr[i] != NULL)
1511 free(g->a_ctx->ctx_mac_ptr[i]);
1512 if (g->a_ctx->ctx_mac_buf[i] != NULL)
1513 free(g->a_ctx->ctx_mac_buf[i]);
1514 g->a_ctx->ctx_mac_ptr[i] = argv;
1515 g->a_ctx->ctx_mac_buf[i] = g->a_buf;
1520 ** ST_QUIT -- quit command
1523 ** g -- generic argument structure
1534 sfsistat (*fi_close) __P((SMFICTX *));
1537 return _SMFIS_ABORT;
1538 if (g->a_ctx->ctx_smfi != NULL &&
1539 (fi_close = g->a_ctx->ctx_smfi->xxfi_close) != NULL)
1540 (void) (*fi_close)(g->a_ctx);
1541 mi_clr_macros(g->a_ctx, 0);
1542 return _SMFIS_NOREPLY;
1546 ** ST_BODYCHUNK -- deal with a piece of the mail body
1549 ** g -- generic argument structure
1552 ** continue or filter-specified value
1559 sfsistat (*fi_body) __P((SMFICTX *, unsigned char *, size_t));
1562 return _SMFIS_ABORT;
1563 if (g->a_ctx->ctx_smfi != NULL &&
1564 (fi_body = g->a_ctx->ctx_smfi->xxfi_body) != NULL)
1565 return (*fi_body)(g->a_ctx, (unsigned char *)g->a_buf,
1567 return SMFIS_CONTINUE;
1571 ** ST_BODYEND -- deal with the last piece of the mail body
1574 ** g -- generic argument structure
1577 ** continue or filter-specified value
1580 ** sends a reply for the body part (if non-empty).
1588 sfsistat (*fi_body) __P((SMFICTX *, unsigned char *, size_t));
1589 sfsistat (*fi_eom) __P((SMFICTX *));
1592 return _SMFIS_ABORT;
1594 if (g->a_ctx->ctx_smfi != NULL)
1596 if ((fi_body = g->a_ctx->ctx_smfi->xxfi_body) != NULL &&
1600 struct timeval timeout;
1602 timeout.tv_sec = g->a_ctx->ctx_timeout;
1603 timeout.tv_usec = 0;
1604 sd = g->a_ctx->ctx_sd;
1605 r = (*fi_body)(g->a_ctx, (unsigned char *)g->a_buf,
1607 if (r != SMFIS_CONTINUE &&
1608 sendreply(r, sd, &timeout, g->a_ctx) != MI_SUCCESS)
1609 return _SMFIS_ABORT;
1612 if (r == SMFIS_CONTINUE &&
1613 (fi_eom = g->a_ctx->ctx_smfi->xxfi_eom) != NULL)
1614 return (*fi_eom)(g->a_ctx);
1619 ** ST_ABORTFCT -- deal with aborts
1622 ** g -- generic argument structure
1625 ** abort or filter-specified value
1632 sfsistat (*fi_abort) __P((SMFICTX *));
1635 return _SMFIS_ABORT;
1636 if (g != NULL && g->a_ctx->ctx_smfi != NULL &&
1637 (fi_abort = g->a_ctx->ctx_smfi->xxfi_abort) != NULL)
1638 (void) (*fi_abort)(g->a_ctx);
1639 return _SMFIS_NOREPLY;
1643 ** TRANS_OK -- is the state transition ok?
1650 ** state transition ok
1660 if (s >= SIZE_NEXT_STATES)
1664 /* is this state transition allowed? */
1665 if ((MI_MASK(new) & next_states[s]) != 0)
1669 ** no: try next state;
1670 ** this works since the relevant states are ordered
1671 ** strict sequentially
1675 if (n >= SIZE_NEXT_STATES)
1679 ** can we actually "skip" this state?
1680 ** see fix_stm() which sets this bit for those
1681 ** states which the filter program is not interested in
1684 if (bitset(NX_SKIP, next_states[n]))
1688 } while (s < SIZE_NEXT_STATES);
1693 ** FIX_STM -- add "skip" bits to the state transition table
1696 ** ctx -- context structure
1702 ** may change state transition table.
1711 if (ctx == NULL || ctx->ctx_smfi == NULL)
1713 fl = ctx->ctx_pflags;
1714 if (bitset(SMFIP_NOCONNECT, fl))
1715 next_states[ST_CONN] |= NX_SKIP;
1716 if (bitset(SMFIP_NOHELO, fl))
1717 next_states[ST_HELO] |= NX_SKIP;
1718 if (bitset(SMFIP_NOMAIL, fl))
1719 next_states[ST_MAIL] |= NX_SKIP;
1720 if (bitset(SMFIP_NORCPT, fl))
1721 next_states[ST_RCPT] |= NX_SKIP;
1722 if (bitset(SMFIP_NOHDRS, fl))
1723 next_states[ST_HDRS] |= NX_SKIP;
1724 if (bitset(SMFIP_NOEOH, fl))
1725 next_states[ST_EOHS] |= NX_SKIP;
1726 if (bitset(SMFIP_NOBODY, fl))
1727 next_states[ST_BODY] |= NX_SKIP;
1728 if (bitset(SMFIP_NODATA, fl))
1729 next_states[ST_DATA] |= NX_SKIP;
1730 if (bitset(SMFIP_NOUNKNOWN, fl))
1731 next_states[ST_UNKN] |= NX_SKIP;
1735 ** DEC_ARGV -- split a buffer into a list of strings, NULL terminated
1738 ** buf -- buffer with several strings
1739 ** len -- length of buffer
1742 ** array of pointers to the individual strings
1755 for (i = 0; i < len; i++)
1763 /* last entry is only for the name */
1764 s = (char **)malloc((nelem + 1) * (sizeof *s));
1768 for (i = 0, elem = 0; i < len && elem < nelem; i++)
1776 s[elem] = &(buf[i + 1]);
1780 /* overwrite last entry (already done above, just paranoia) */
1786 ** DEC_ARG2 -- split a buffer into two strings
1789 ** buf -- buffer with two strings
1790 ** len -- length of buffer
1791 ** s1,s2 -- pointer to result strings
1794 ** MI_FAILURE/MI_SUCCESS
1798 dec_arg2(buf, len, s1, s2)
1806 /* paranoia: check for terminating '\0' */
1807 if (len == 0 || buf[len - 1] != '\0')
1810 for (i = 1; i < len && buf[i] != '\0'; i++)
1819 ** SENDOK -- is it ok for the filter to send stuff to the MTA?
1822 ** ctx -- context structure
1823 ** flag -- flag to check
1826 ** sending allowed (in current state)
1830 mi_sendok(ctx, flag)
1834 if (ctx == NULL || ctx->ctx_smfi == NULL)
1837 /* did the milter request this operation? */
1838 if (flag != 0 && !bitset(flag, ctx->ctx_aflags))
1841 /* are we in the correct state? It must be "End of Message". */
1842 return ctx->ctx_state == ST_ENDM;
1845 #if _FFR_WORKERS_POOL
1847 ** MI_RD_SOCKET_READY - checks if the socket is ready for read(2)
1853 ** true iff socket is ready for read(2)
1856 #define MI_RD_CMD_TO 1
1857 #define MI_RD_MAX_ERR 16
1860 mi_rd_socket_ready (sd)
1867 #else /* SM_CONF_POLL */
1868 fd_set rd_set, exc_set;
1869 #endif /* SM_CONF_POLL */
1875 pfd.events = POLLIN;
1878 n = poll(&pfd, 1, MI_RD_CMD_TO);
1879 #else /* SM_CONF_POLL */
1880 struct timeval timeout;
1884 FD_SET(sd, &rd_set);
1885 FD_SET(sd, &exc_set);
1887 timeout.tv_sec = MI_RD_CMD_TO / 1000;
1888 timeout.tv_usec = 0;
1889 n = select(sd + 1, &rd_set, NULL, &exc_set, &timeout);
1890 #endif /* SM_CONF_POLL */
1905 } while (nerr < MI_RD_MAX_ERR);
1906 if (nerr >= MI_RD_MAX_ERR)
1910 return (pfd.revents != 0);
1911 #else /* SM_CONF_POLL */
1912 return FD_ISSET(sd, &rd_set) || FD_ISSET(sd, &exc_set);
1913 #endif /* SM_CONF_POLL */
1915 #endif /* _FFR_WORKERS_POOL */