memset(&sockaddr, '\0', sizeof sockaddr);
(void) memset(&sockaddr, '\0', sizeof sockaddr);
static char	**dec_argv __P((char *, size_t));static int	dec_arg2 __P((char *, size_t, char **, char **));/* states */#define ST_NONE	(-1)#define ST_INIT	0	/* initial state */#define ST_OPTS	1	/* option negotiation */#define ST_CONN	2	/* connection info */#define ST_HELO	3	/* helo */#define ST_MAIL	4	/* mail from */#define ST_RCPT	5	/* rcpt to */#define ST_HDRS	6	/* headers */#define ST_EOHS	7	/* end of headers */#define ST_BODY	8	/* body */#define ST_ENDM	9	/* end of message */#define ST_QUIT	10	/* quit */#define ST_ABRT	11	/* abort */#define ST_LAST	ST_ABRT#define ST_SKIP	15	/* not a state but required for the state table *//* in a mail transaction? must be before eom according to spec. */#define ST_IN_MAIL(st)	((st) >= ST_MAIL && (st) < ST_ENDM)/***  set of next states**  each state (ST_*) corresponds to bit in an int value (1 << state)**  each state has a set of allowed transitions ('or' of bits of states)**  so a state transition is valid if the mask of the next state**  is set in the NX_* value**  this function is coded in trans_ok(), see below.*/#define MI_MASK(x)	(0x0001 << (x))	/* generate a bit "mask" for a state */#define NX_INIT	(MI_MASK(ST_OPTS))#define NX_OPTS	(MI_MASK(ST_CONN))#define NX_CONN	(MI_MASK(ST_HELO) | MI_MASK(ST_MAIL))#define NX_HELO	(MI_MASK(ST_HELO) | MI_MASK(ST_MAIL))#define NX_MAIL	(MI_MASK(ST_RCPT) | MI_MASK(ST_ABRT))#define NX_RCPT	(MI_MASK(ST_HDRS) | MI_MASK(ST_EOHS) | \		 MI_MASK(ST_BODY) | MI_MASK(ST_ENDM) | \		 MI_MASK(ST_RCPT) | MI_MASK(ST_ABRT))#define NX_HDRS	(MI_MASK(ST_EOHS) | MI_MASK(ST_HDRS) | MI_MASK(ST_ABRT))#define NX_EOHS	(MI_MASK(ST_BODY) | MI_MASK(ST_ENDM) | MI_MASK(ST_ABRT))#define NX_BODY	(MI_MASK(ST_ENDM) | MI_MASK(ST_BODY) | MI_MASK(ST_ABRT))#define NX_ENDM	(MI_MASK(ST_QUIT) | MI_MASK(ST_MAIL))#define NX_QUIT	0#define NX_ABRT	0#define NX_SKIP MI_MASK(ST_SKIP)static int next_states[] ={	NX_INIT,	NX_OPTS,	NX_CONN,	NX_HELO,	NX_MAIL,	NX_RCPT,	NX_HDRS,	NX_EOHS,	NX_BODY,	NX_ENDM,	NX_QUIT,	NX_ABRT};/* commands received by milter */static cmdfct cmds[] ={{SMFIC_ABORT,	CM_ARG0, ST_ABRT,  CT_CONT,	CI_NONE, st_abortfct	},{SMFIC_MACRO,	CM_ARGV, ST_NONE,  CT_KEEP,	CI_NONE, st_macros	},{SMFIC_BODY,	CM_ARG1, ST_BODY,  CT_CONT,	CI_NONE, st_bodychunk	},{SMFIC_CONNECT,	CM_ARG2, ST_CONN,  CT_CONT,	CI_CONN, st_connectinfo	},{SMFIC_BODYEOB,	CM_ARG1, ST_ENDM,  CT_CONT,	CI_NONE, st_bodyend	},{SMFIC_HELO,	CM_ARG1, ST_HELO,  CT_CONT,	CI_HELO, st_helo	},{SMFIC_HEADER,	CM_ARG2, ST_HDRS,  CT_CONT,	CI_NONE, st_header	},{SMFIC_MAIL,	CM_ARGV, ST_MAIL,  CT_CONT,	CI_MAIL, st_sender	},{SMFIC_OPTNEG,	CM_ARGO, ST_OPTS,  CT_CONT,	CI_NONE, st_optionneg	},{SMFIC_EOH,	CM_ARG0, ST_EOHS,  CT_CONT,	CI_NONE, st_eoh		},{SMFIC_QUIT,	CM_ARG0, ST_QUIT,  CT_END,	CI_NONE, st_quit	},{SMFIC_RCPT,	CM_ARGV, ST_RCPT,  CT_IGNO,	CI_RCPT, st_rcpt	}};/* additional (internal) reply codes */#define _SMFIS_KEEP	20#define _SMFIS_ABORT	21#define _SMFIS_OPTIONS	22#define _SMFIS_NOREPLY	23#define _SMFIS_FAIL	(-1)#define _SMFIS_NONE	(-2)/***  MI_ENGINE -- receive commands and process them****	Parameters:**		ctx -- context structure****	Returns:**		MI_FAILURE/MI_SUCCESS*/intmi_engine(ctx)	SMFICTX_PTR ctx;{	size_t len;	int i;	socket_t sd;	int ret = MI_SUCCESS;	int ncmds = sizeof(cmds) / sizeof(cmdfct);	int curstate = ST_INIT;	int newstate;	bool call_abort;	sfsistat r;	char cmd;	char *buf = NULL;	genarg arg;	struct timeval timeout;	int (*f) __P((genarg *));	sfsistat (*fi_abort) __P((SMFICTX *));	sfsistat (*fi_close) __P((SMFICTX *));	arg.a_ctx = ctx;	sd = ctx->ctx_sd;	fi_abort = ctx->ctx_smfi->xxfi_abort;	mi_clr_macros(ctx, 0);	fix_stm(ctx);	r = _SMFIS_NONE;	do	{		/* call abort only if in a mail transaction */		call_abort = ST_IN_MAIL(curstate);		timeout.tv_sec = ctx->ctx_timeout;		timeout.tv_usec = 0;		if (mi_stop() == MILTER_ABRT)		{			if (ctx->ctx_dbg > 3)				sm_dprintf("[%d] milter_abort\n",					(int) ctx->ctx_id);			ret = MI_FAILURE;			break;		}		/*		**  Notice: buf is allocated by mi_rd_cmd() and it will		**  usually be free()d after it has been used in f().		**  However, if the function returns _SMFIS_KEEP then buf		**  contains macros and will not be free()d.		**  Hence r must be set to _SMFIS_NONE if a new buf is		**  allocated to avoid problem with housekeeping, esp.		**  if the code "break"s out of the loop.		*/		r = _SMFIS_NONE;		if ((buf = mi_rd_cmd(sd, &timeout, &cmd, &len,				     ctx->ctx_smfi->xxfi_name)) == NULL &&		    cmd < SMFIC_VALIDCMD)		{			if (ctx->ctx_dbg > 5)				sm_dprintf("[%d] mi_engine: mi_rd_cmd error (%x)\n",					(int) ctx->ctx_id, (int) cmd);			/*			**  eof is currently treated as failure ->			**  abort() instead of close(), otherwise use:			**  if (cmd != SMFIC_EOF)			*/			ret = MI_FAILURE;			break;		}		if (ctx->ctx_dbg > 4)			sm_dprintf("[%d] got cmd '%c' len %d\n",				(int) ctx->ctx_id, cmd, (int) len);		for (i = 0; i < ncmds; i++)		{			if (cmd == cmds[i].cm_cmd)				break;		}		if (i >= ncmds)		{			/* unknown command */			if (ctx->ctx_dbg > 1)				sm_dprintf("[%d] cmd '%c' unknown\n",					(int) ctx->ctx_id, cmd);			ret = MI_FAILURE;			break;		}		if ((f = cmds[i].cm_fct) == NULL)		{			/* stop for now */			if (ctx->ctx_dbg > 1)				sm_dprintf("[%d] cmd '%c' not impl\n",					(int) ctx->ctx_id, cmd);			ret = MI_FAILURE;			break;		}		/* is new state ok? */		newstate = cmds[i].cm_next;		if (ctx->ctx_dbg > 5)			sm_dprintf("[%d] cur %x new %x nextmask %x\n",				(int) ctx->ctx_id,				curstate, newstate, next_states[curstate]);		if (newstate != ST_NONE && !trans_ok(curstate, newstate))		{			if (ctx->ctx_dbg > 1)				sm_dprintf("[%d] abort: cur %d (%x) new %d (%x) next %x\n",					(int) ctx->ctx_id,					curstate, MI_MASK(curstate),					newstate, MI_MASK(newstate),					next_states[curstate]);			/* call abort only if in a mail transaction */			if (fi_abort != NULL && call_abort)				(void) (*fi_abort)(ctx);			/*			**  try to reach the new state from HELO			**  if it can't be reached, ignore the command.			*/			curstate = ST_HELO;			if (!trans_ok(curstate, newstate))			{				if (buf != NULL)				{					free(buf);					buf = NULL;				}				continue;			}		}		arg.a_len = len;		arg.a_buf = buf;		if (newstate != ST_NONE)		{			curstate = newstate;			ctx->ctx_state = curstate;		}		arg.a_idx = cmds[i].cm_macros;		/* call function to deal with command */		r = (*f)(&arg);		if (r != _SMFIS_KEEP && buf != NULL)		{			free(buf);			buf = NULL;		}		if (sendreply(r, sd, &timeout, ctx) != MI_SUCCESS)		{			ret = MI_FAILURE;			break;		}		call_abort = ST_IN_MAIL(curstate);		if (r == SMFIS_ACCEPT)		{			/* accept mail, no further actions taken */			curstate = ST_HELO;		}		else if (r == SMFIS_REJECT || r == SMFIS_DISCARD ||			 r ==  SMFIS_TEMPFAIL)		{			/*			**  further actions depend on current state			**  if the IGNO bit is set: "ignore" the error,			**  i.e., stay in the current state			*/			if (!bitset(CT_IGNO, cmds[i].cm_todo))				curstate = ST_HELO;		}		else if (r == _SMFIS_ABORT)		{			if (ctx->ctx_dbg > 5)				sm_dprintf("[%d] function returned abort\n",					(int) ctx->ctx_id);			ret = MI_FAILURE;			break;		}	} while (!bitset(CT_END, cmds[i].cm_todo));	if (ret != MI_SUCCESS)	{		/* call abort only if in a mail transaction */		if (fi_abort != NULL && call_abort)			(void) (*fi_abort)(ctx);	}	/* close must always be called */	if ((fi_close = ctx->ctx_smfi->xxfi_close) != NULL)		(void) (*fi_close)(ctx);	if (r != _SMFIS_KEEP && buf != NULL)		free(buf);	mi_clr_macros(ctx, 0);	return ret;}/***  SENDREPLY -- send a reply to the MTA****	Parameters:**		r -- reply code**		sd -- socket descriptor**		timeout_ptr -- (ptr to) timeout to use for sending**		ctx -- context structure****	Returns:**		MI_SUCCESS/MI_FAILURE*/static intsendreply(r, sd, timeout_ptr, ctx)	sfsistat r;	socket_t sd;	struct timeval *timeout_ptr;	SMFICTX_PTR ctx;{	int ret = MI_SUCCESS;	switch (r)	{	  case SMFIS_CONTINUE:		ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_CONTINUE, NULL, 0);		break;	  case SMFIS_TEMPFAIL:	  case SMFIS_REJECT:		if (ctx->ctx_reply != NULL &&		    ((r == SMFIS_TEMPFAIL && *ctx->ctx_reply == '4') ||		     (r == SMFIS_REJECT && *ctx->ctx_reply == '5')))		{			ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_REPLYCODE,					ctx->ctx_reply,					strlen(ctx->ctx_reply) + 1);			free(ctx->ctx_reply);			ctx->ctx_reply = NULL;		}		else		{			ret = mi_wr_cmd(sd, timeout_ptr, r == SMFIS_REJECT ?					SMFIR_REJECT : SMFIR_TEMPFAIL, NULL, 0);		}		break;	  case SMFIS_DISCARD:		ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_DISCARD, NULL, 0);		break;	  case SMFIS_ACCEPT:		ret = mi_wr_cmd(sd, timeout_ptr, SMFIR_ACCEPT, NULL, 0);		break;	  case _SMFIS_OPTIONS:		{			char buf[MILTER_OPTLEN];			mi_int32 v;			v = htonl(ctx->ctx_smfi->xxfi_version);			(void) memcpy(&(buf[0]), (void *) &v, MILTER_LEN_BYTES);			v = htonl(ctx->ctx_smfi->xxfi_flags);			(void) memcpy(&(buf[MILTER_LEN_BYTES]), (void *) &v,				      MILTER_LEN_BYTES);			v = htonl(ctx->ctx_pflags);			(void) memcpy(&(buf[MILTER_LEN_BYTES * 2]), (void *) &v,				      MILTER_LEN_BYTES);			ret = mi_wr_cmd(sd, timeout_ptr, SMFIC_OPTNEG, buf,				       MILTER_OPTLEN);		}		break;	  default:	/* don't send a reply */		break;	}	return ret;}/***  CLR_MACROS -- clear set of macros starting from a given index****	Parameters:**		ctx -- context structure**		m -- index from which to clear all macros****	Returns:**		None.*/voidmi_clr_macros(ctx, m)	SMFICTX_PTR ctx;	int m;{	int i;	for (i = m; i < MAX_MACROS_ENTRIES; i++)	{		if (ctx->ctx_mac_ptr[i] != NULL)		{			free(ctx->ctx_mac_ptr[i]);			ctx->ctx_mac_ptr[i] = NULL;		}		if (ctx->ctx_mac_buf[i] != NULL)		{			free(ctx->ctx_mac_buf[i]);			ctx->ctx_mac_buf[i] = NULL;		}	}}/***  ST_OPTIONNEG -- negotiate options****	Parameters:**		g -- generic argument structure****	Returns:**		abort/send options/continue*/static intst_optionneg(g)	genarg *g;{	mi_int32 i, v;	if (g == NULL || g->a_ctx->ctx_smfi == NULL)		return SMFIS_CONTINUE;	mi_clr_macros(g->a_ctx, g->a_idx + 1);	/* check for minimum length */	if (g->a_len < MILTER_OPTLEN)	{		smi_log(SMI_LOG_ERR,			"%s: st_optionneg[%d]: len too short %d < %d",			g->a_ctx->ctx_smfi->xxfi_name,			(int) g->a_ctx->ctx_id, (int) g->a_len,			MILTER_OPTLEN);		return _SMFIS_ABORT;	}	(void) memcpy((void *) &i, (void *) &(g->a_buf[0]),		      MILTER_LEN_BYTES);	v = ntohl(i);	if (v < g->a_ctx->ctx_smfi->xxfi_version)	{		/* hard failure for now! */		smi_log(SMI_LOG_ERR,			"%s: st_optionneg[%d]: version mismatch MTA: %d < milter: %d",			g->a_ctx->ctx_smfi->xxfi_name,			(int) g->a_ctx->ctx_id, (int) v,			g->a_ctx->ctx_smfi->xxfi_version);		return _SMFIS_ABORT;	}	(void) memcpy((void *) &i, (void *) &(g->a_buf[MILTER_LEN_BYTES]),		      MILTER_LEN_BYTES);	v = ntohl(i);	/* no flags? set to default value for V1 actions */	if (v == 0)		v = SMFI_V1_ACTS;	i = g->a_ctx->ctx_smfi->xxfi_flags;	if ((v & i) != i)	{		smi_log(SMI_LOG_ERR,			"%s: st_optionneg[%d]: 0x%x does not fulfill action requirements 0x%x",			g->a_ctx->ctx_smfi->xxfi_name,			(int) g->a_ctx->ctx_id, v, i);		return _SMFIS_ABORT;	}	(void) memcpy((void *) &i, (void *) &(g->a_buf[MILTER_LEN_BYTES * 2]),		      MILTER_LEN_BYTES);	v = ntohl(i);	/* no flags? set to default value for V1 protocol */	if (v == 0)		v = SMFI_V1_PROT;	i = g->a_ctx->ctx_pflags;	if ((v & i) != i)	{		smi_log(SMI_LOG_ERR,			"%s: st_optionneg[%d]: 0x%x does not fulfill protocol requirements 0x%x",			g->a_ctx->ctx_smfi->xxfi_name,			(int) g->a_ctx->ctx_id, v, i);		return _SMFIS_ABORT;	}	return _SMFIS_OPTIONS;}/***  ST_CONNECTINFO -- receive connection information****	Parameters:**		g -- generic argument structure****	Returns:**		continue or filter-specified value*/static intst_connectinfo(g)	genarg *g;{	size_t l;	size_t i;	char *s, family;	unsigned short port = 0;	_SOCK_ADDR sockaddr;	sfsistat (*fi_connect) __P((SMFICTX *, char *, _SOCK_ADDR *));	if (g == NULL)		return _SMFIS_ABORT;	mi_clr_macros(g->a_ctx, g->a_idx + 1);	if (g->a_ctx->ctx_smfi == NULL ||	    (fi_connect = g->a_ctx->ctx_smfi->xxfi_connect) == NULL)		return SMFIS_CONTINUE;	s = g->a_buf;	i = 0;	l = g->a_len;	while (s[i] != '\0' && i <= l)		++i;	if (i >= l)		return _SMFIS_ABORT;	/* Move past trailing \0 in host string */	i++;	family = s[i++];	memset(&sockaddr, '\0', sizeof sockaddr);	if (family != SMFIA_UNKNOWN)	{		(void) memcpy((void *) &port, (void *) (s + i),			      sizeof port);		if ((i += sizeof port) >= l)		{			smi_log(SMI_LOG_ERR,				"%s: connect[%d]: wrong len %d >= %d",				g->a_ctx->ctx_smfi->xxfi_name,				(int) g->a_ctx->ctx_id, (int) i, (int) l);			return _SMFIS_ABORT;		}		/* make sure string is terminated */		if (s[l - 1] != '\0')			return _SMFIS_ABORT;# if NETINET		if (family == SMFIA_INET)		{			if (inet_aton(s + i, (struct in_addr *) &sockaddr.sin.sin_addr)			    != 1)			{				smi_log(SMI_LOG_ERR,					"%s: connect[%d]: inet_aton failed",					g->a_ctx->ctx_smfi->xxfi_name,					(int) g->a_ctx->ctx_id);				return _SMFIS_ABORT;			}			sockaddr.sa.sa_family = AF_INET;			if (port > 0)				sockaddr.sin.sin_port = port;		}		else# endif /* NETINET */# if NETINET6		if (family == SMFIA_INET6)		{			if (mi_inet_pton(AF_INET6, s + i,					 &sockaddr.sin6.sin6_addr) != 1)			{				smi_log(SMI_LOG_ERR,					"%s: connect[%d]: mi_inet_pton failed",					g->a_ctx->ctx_smfi->xxfi_name,					(int) g->a_ctx->ctx_id);				return _SMFIS_ABORT;			}			sockaddr.sa.sa_family = AF_INET6;			if (port > 0)				sockaddr.sin6.sin6_port = port;		}		else# endif /* NETINET6 */# if NETUNIX		if (family == SMFIA_UNIX)		{			if (sm_strlcpy(sockaddr.sunix.sun_path, s + i,			    sizeof sockaddr.sunix.sun_path) >=			    sizeof sockaddr.sunix.sun_path)			{				smi_log(SMI_LOG_ERR,					"%s: connect[%d]: path too long",					g->a_ctx->ctx_smfi->xxfi_name,					(int) g->a_ctx->ctx_id);				return _SMFIS_ABORT;			}			sockaddr.sunix.sun_family = AF_UNIX;		}		else# endif /* NETUNIX */		{			smi_log(SMI_LOG_ERR,				"%s: connect[%d]: unknown family %d",				g->a_ctx->ctx_smfi->xxfi_name,				(int) g->a_ctx->ctx_id, family);			return _SMFIS_ABORT;		}	}	return (*fi_connect)(g->a_ctx, g->a_buf,			     family != SMFIA_UNKNOWN ? &sockaddr : NULL);}/***  ST_EOH -- end of headers****	Parameters:**		g -- generic argument structure****	Returns:**		continue or filter-specified value*/static intst_eoh(g)	genarg *g;{	sfsistat (*fi_eoh) __P((SMFICTX *));	if (g == NULL)		return _SMFIS_ABORT;	if (g->a_ctx->ctx_smfi != NULL &&	    (fi_eoh = g->a_ctx->ctx_smfi->xxfi_eoh) != NULL)		return (*fi_eoh)(g->a_ctx);	return SMFIS_CONTINUE;}/***  ST_HELO -- helo/ehlo command****	Parameters:**		g -- generic argument structure****	Returns:**		continue or filter-specified value*/static intst_helo(g)	genarg *g;{	sfsistat (*fi_helo) __P((SMFICTX *, char *));	if (g == NULL)		return _SMFIS_ABORT;	mi_clr_macros(g->a_ctx, g->a_idx + 1);	if (g->a_ctx->ctx_smfi != NULL &&	    (fi_helo = g->a_ctx->ctx_smfi->xxfi_helo) != NULL)		return (*fi_helo)(g->a_ctx, g->a_buf);	return SMFIS_CONTINUE;}/***  ST_HEADER -- header line****	Parameters:**		g -- generic argument structure****	Returns:**		continue or filter-specified value*/static intst_header(g)	genarg *g;{	char *hf, *hv;	sfsistat (*fi_header) __P((SMFICTX *, char *, char *));	if (g == NULL)		return _SMFIS_ABORT;	if (g->a_ctx->ctx_smfi == NULL ||	    (fi_header = g->a_ctx->ctx_smfi->xxfi_header) == NULL)		return SMFIS_CONTINUE;	if (dec_arg2(g->a_buf, g->a_len, &hf, &hv) == MI_SUCCESS)		return (*fi_header)(g->a_ctx, hf, hv);	else		return _SMFIS_ABORT;}#define ARGV_FCT(lf, rf, idx)					\	char **argv;						\	sfsistat (*lf) __P((SMFICTX *, char **));		\	int r;							\								\	if (g == NULL)						\		return _SMFIS_ABORT;				\	mi_clr_macros(g->a_ctx, g->a_idx + 1);			\	if (g->a_ctx->ctx_smfi == NULL ||			\	    (lf = g->a_ctx->ctx_smfi->rf) == NULL)		\		return SMFIS_CONTINUE;				\	if ((argv = dec_argv(g->a_buf, g->a_len)) == NULL)	\		return _SMFIS_ABORT;				\	r = (*lf)(g->a_ctx, argv);				\	free(argv);						\	return r;/***  ST_SENDER -- MAIL FROM command****	Parameters:**		g -- generic argument structure****	Returns:**		continue or filter-specified value*/static intst_sender(g)	genarg *g;{	ARGV_FCT(fi_envfrom, xxfi_envfrom, CI_MAIL)}/***  ST_RCPT -- RCPT TO command****	Parameters:**		g -- generic argument structure****	Returns:**		continue or filter-specified value*/static intst_rcpt(g)	genarg *g;{	ARGV_FCT(fi_envrcpt, xxfi_envrcpt, CI_RCPT)}/***  ST_MACROS -- deal with macros received from the MTA****	Parameters:**		g -- generic argument structure****	Returns:**		continue/keep****	Side effects:**		set pointer in macro array to current values.*/static intst_macros(g)	genarg *g;{	int i;	char **argv;	if (g == NULL || g->a_len < 1)		return _SMFIS_FAIL;	if ((argv = dec_argv(g->a_buf + 1, g->a_len - 1)) == NULL)		return _SMFIS_FAIL;	switch (g->a_buf[0])	{	  case SMFIC_CONNECT:		i = CI_CONN;		break;	  case SMFIC_HELO:		i = CI_HELO;		break;	  case SMFIC_MAIL:		i = CI_MAIL;		break;	  case SMFIC_RCPT:		i = CI_RCPT;		break;	  default:		free(argv);		return _SMFIS_FAIL;	}	if (g->a_ctx->ctx_mac_ptr[i] != NULL)		free(g->a_ctx->ctx_mac_ptr[i]);	if (g->a_ctx->ctx_mac_buf[i] != NULL)		free(g->a_ctx->ctx_mac_buf[i]);	g->a_ctx->ctx_mac_ptr[i] = argv;	g->a_ctx->ctx_mac_buf[i] = g->a_buf;	return _SMFIS_KEEP;}/***  ST_QUIT -- quit command****	Parameters:**		g -- generic argument structure****	Returns:**		noreply*/static intst_quit(g)	genarg *g;{	return _SMFIS_NOREPLY;}/***  ST_BODYCHUNK -- deal with a piece of the mail body****	Parameters:**		g -- generic argument structure****	Returns:**		continue or filter-specified value*/static intst_bodychunk(g)	genarg *g;{	sfsistat (*fi_body) __P((SMFICTX *, unsigned char *, size_t));	if (g == NULL)		return _SMFIS_ABORT;	if (g->a_ctx->ctx_smfi != NULL &&	    (fi_body = g->a_ctx->ctx_smfi->xxfi_body) != NULL)		return (*fi_body)(g->a_ctx, (unsigned char *)g->a_buf,				  g->a_len);	return SMFIS_CONTINUE;}/***  ST_BODYEND -- deal with the last piece of the mail body****	Parameters:**		g -- generic argument structure****	Returns:**		continue or filter-specified value****	Side effects:**		sends a reply for the body part (if non-empty).*/static intst_bodyend(g)	genarg *g;{	sfsistat r;	sfsistat (*fi_body) __P((SMFICTX *, unsigned char *, size_t));	sfsistat (*fi_eom) __P((SMFICTX *));	if (g == NULL)		return _SMFIS_ABORT;	r = SMFIS_CONTINUE;	if (g->a_ctx->ctx_smfi != NULL)	{		if ((fi_body = g->a_ctx->ctx_smfi->xxfi_body) != NULL &&		    g->a_len > 0)		{			socket_t sd;			struct timeval timeout;			timeout.tv_sec = g->a_ctx->ctx_timeout;			timeout.tv_usec = 0;			sd = g->a_ctx->ctx_sd;			r = (*fi_body)(g->a_ctx, (unsigned char *)g->a_buf,				       g->a_len);			if (r != SMFIS_CONTINUE &&			    sendreply(r, sd, &timeout, g->a_ctx) != MI_SUCCESS)				return _SMFIS_ABORT;		}	}	if (r == SMFIS_CONTINUE &&	    (fi_eom = g->a_ctx->ctx_smfi->xxfi_eom) != NULL)		return (*fi_eom)(g->a_ctx);	return r;}/***  ST_ABORTFCT -- deal with aborts****	Parameters:**		g -- generic argument structure****	Returns:**		abort or filter-specified value*/static intst_abortfct(g)	genarg *g;{	sfsistat (*fi_abort) __P((SMFICTX *));	if (g == NULL)		return _SMFIS_ABORT;	if (g != NULL && g->a_ctx->ctx_smfi != NULL &&	    (fi_abort = g->a_ctx->ctx_smfi->xxfi_abort) != NULL)		(void) (*fi_abort)(g->a_ctx);	return _SMFIS_NOREPLY;}/***  TRANS_OK -- is the state transition ok?****	Parameters:**		old -- old state**		new -- new state****	Returns:**		state transition ok*/static booltrans_ok(old, new)	int old, new;{	int s, n;	s = old;	do	{		/* is this state transition allowed? */		if ((MI_MASK(new) & next_states[s]) != 0)			return true;		/*		**  no: try next state;		**  this works since the relevant states are ordered		**  strict sequentially		*/		n = s + 1;		/*		**  can we actually "skip" this state?		**  see fix_stm() which sets this bit for those		**  states which the filter program is not interested in		*/		if (bitset(NX_SKIP, next_states[n]))			s = n;		else			return false;	} while (s <= ST_LAST);	return false;}/***  FIX_STM -- add "skip" bits to the state transition table****	Parameters:**		ctx -- context structure****	Returns:**		None.****	Side effects:**		may change state transition table.*/static voidfix_stm(ctx)	SMFICTX_PTR ctx;{	unsigned long fl;	if (ctx == NULL || ctx->ctx_smfi == NULL)		return;	fl = ctx->ctx_pflags;	if (bitset(SMFIP_NOCONNECT, fl))		next_states[ST_CONN] |= NX_SKIP;	if (bitset(SMFIP_NOHELO, fl))		next_states[ST_HELO] |= NX_SKIP;	if (bitset(SMFIP_NOMAIL, fl))		next_states[ST_MAIL] |= NX_SKIP;	if (bitset(SMFIP_NORCPT, fl))		next_states[ST_RCPT] |= NX_SKIP;	if (bitset(SMFIP_NOHDRS, fl))		next_states[ST_HDRS] |= NX_SKIP;	if (bitset(SMFIP_NOEOH, fl))		next_states[ST_EOHS] |= NX_SKIP;	if (bitset(SMFIP_NOBODY, fl))		next_states[ST_BODY] |= NX_SKIP;}/***  DEC_ARGV -- split a buffer into a list of strings, NULL terminated****	Parameters:**		buf -- buffer with several strings**		len -- length of buffer****	Returns:**		array of pointers to the individual strings*/static char **dec_argv(buf, len)	char *buf;	size_t len;{	char **s;	size_t i;	int elem, nelem;	nelem = 0;	for (i = 0; i < len; i++)	{		if (buf[i] == '\0')			++nelem;	}	if (nelem == 0)		return NULL;	/* last entry is only for the name */	s = (char **)malloc((nelem + 1) * (sizeof *s));	if (s == NULL)		return NULL;	s[0] = buf;	for (i = 0, elem = 0; i < len && elem < nelem; i++)	{		if (buf[i] == '\0')			s[++elem] = &(buf[i + 1]);	}	/* overwrite last entry */	s[elem] = NULL;	return s;}