[exim.git] / src / src / spam.c

/* $Cambridge: exim/src/src/spam.c,v 1.17 2008/07/18 17:55:42 fanf2 Exp $ */

/*************************************************
*     Exim - an Internet mail transport agent    *
*************************************************/

/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */
/* License: GPL */

/* Code for calling spamassassin's spamd. Called from acl.c. */

#include "exim.h"
#ifdef WITH_CONTENT_SCAN
#include "spam.h"

uschar spam_score_buffer[16];
uschar spam_score_int_buffer[16];
uschar spam_bar_buffer[128];
uschar spam_report_buffer[32600];
uschar prev_user_name[128] = "";
int spam_ok = 0;
int spam_rc = 0;

int spam(uschar **listptr) {
  int sep = 0;
  uschar *list = *listptr;
  uschar *user_name;
  uschar user_name_buffer[128];
  unsigned long mbox_size;
  FILE *mbox_file;
  int spamd_sock;
  uschar spamd_buffer[32600];
  int i, j, offset, result;
  uschar spamd_version[8];
  uschar spamd_score_char;
  double spamd_threshold, spamd_score;
  int spamd_report_offset;
  uschar *p,*q;
  int override = 0;
  time_t start;
  size_t read, wrote;
  struct sockaddr_un server;
#ifndef NO_POLL_H
  struct pollfd pollfd;
#else                               /* Patch posted by Erik ? for OS X */
  struct timeval select_tv;         /* and applied by PH */
  fd_set select_fd;
#endif
  uschar *spamd_address_work;

  /* stop compiler warning */
  result = 0;

  /* find the username from the option list */
  if ((user_name = string_nextinlist(&list, &sep,
                                     user_name_buffer,
                                     sizeof(user_name_buffer))) == NULL) {
    /* no username given, this means no scanning should be done */
    return FAIL;
  };

  /* if username is "0" or "false", do not scan */
  if ( (Ustrcmp(user_name,"0") == 0) ||
       (strcmpic(user_name,US"false") == 0) ) {
    return FAIL;
  };

  /* if there is an additional option, check if it is "true" */
  if (strcmpic(list,US"true") == 0) {
    /* in that case, always return true later */
    override = 1;
  };

  /* if we scanned for this username last time, just return */
  if ( spam_ok && ( Ustrcmp(prev_user_name, user_name) == 0 ) ) {
    if (override)
      return OK;
    else
      return spam_rc;
  };

  /* make sure the eml mbox file is spooled up */
  mbox_file = spool_mbox(&mbox_size);

  if (mbox_file == NULL) {
    /* error while spooling */
    log_write(0, LOG_MAIN|LOG_PANIC,
           "spam acl condition: error while creating mbox spool file");
    return DEFER;
  };

  start = time(NULL);

  if (*spamd_address == '$') {
    spamd_address_work = expand_string(spamd_address);
    if (spamd_address_work == NULL) {
      log_write(0, LOG_MAIN|LOG_PANIC,
        "spamassassin acl condition: spamd_address starts with $, but expansion failed: %s", expand_string_message);
      return DEFER;
    }
  }
  else
    spamd_address_work = spamd_address;

  /* socket does not start with '/' -> network socket */
  if (*spamd_address_work != '/') {
    time_t now = time(NULL);
    int num_servers = 0;
    int current_server = 0;
    int start_server = 0;
    uschar *address = NULL;
    uschar *spamd_address_list_ptr = spamd_address_work;
    uschar address_buffer[256];
    spamd_address_container * spamd_address_vector[32];

    /* Check how many spamd servers we have
       and register their addresses */
    while ((address = string_nextinlist(&spamd_address_list_ptr, &sep,
                                        address_buffer,
                                        sizeof(address_buffer))) != NULL) {

      spamd_address_container *this_spamd =
        (spamd_address_container *)store_get(sizeof(spamd_address_container));

      /* grok spamd address and port */
      if( sscanf(CS address, "%s %u", this_spamd->tcp_addr, &(this_spamd->tcp_port)) != 2 ) {
        log_write(0, LOG_MAIN,
          "spam acl condition: warning - invalid spamd address: '%s'", address);
        continue;
      };

      spamd_address_vector[num_servers] = this_spamd;
      num_servers++;
      if (num_servers > 31)
        break;
    };

    /* check if we have at least one server */
    if (!num_servers) {
      log_write(0, LOG_MAIN|LOG_PANIC,
         "spam acl condition: no useable spamd server addresses in spamd_address configuration option.");
      (void)fclose(mbox_file);
      return DEFER;
    };

    current_server = start_server = (int)now % num_servers;

    while (1) {

      debug_printf("trying server %s, port %u\n",
                   spamd_address_vector[current_server]->tcp_addr,
                   spamd_address_vector[current_server]->tcp_port);

      /* contact a spamd */
      if ( (spamd_sock = ip_socket(SOCK_STREAM, AF_INET)) < 0) {
        log_write(0, LOG_MAIN|LOG_PANIC,
           "spam acl condition: error creating IP socket for spamd");
        (void)fclose(mbox_file);
        return DEFER;
      };

      if (ip_connect( spamd_sock,
                      AF_INET,
                      spamd_address_vector[current_server]->tcp_addr,
                      spamd_address_vector[current_server]->tcp_port,
                      5 ) > -1) {
        /* connection OK */
        break;
      };

      log_write(0, LOG_MAIN|LOG_PANIC,
         "spam acl condition: warning - spamd connection to %s, port %u failed: %s",
         spamd_address_vector[current_server]->tcp_addr,
         spamd_address_vector[current_server]->tcp_port,
         strerror(errno));
      current_server++;
      if (current_server >= num_servers)
        current_server = 0;
      if (current_server == start_server) {
        log_write(0, LOG_MAIN|LOG_PANIC, "spam acl condition: all spamd servers failed");
        (void)fclose(mbox_file);
        (void)close(spamd_sock);
        return DEFER;
      };
    };

  }
  else {
    /* open the local socket */

    if ((spamd_sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
      log_write(0, LOG_MAIN|LOG_PANIC,
                "malware acl condition: spamd: unable to acquire socket (%s)",
                strerror(errno));
      (void)fclose(mbox_file);
      return DEFER;
    }

    server.sun_family = AF_UNIX;
    Ustrcpy(server.sun_path, spamd_address_work);

    if (connect(spamd_sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
      log_write(0, LOG_MAIN|LOG_PANIC,
                "malware acl condition: spamd: unable to connect to UNIX socket %s (%s)",
                spamd_address_work, strerror(errno) );
      (void)fclose(mbox_file);
      (void)close(spamd_sock);
      return DEFER;
    }

  }

  /* now we are connected to spamd on spamd_sock */
  (void)string_format(spamd_buffer,
           sizeof(spamd_buffer),
           "REPORT SPAMC/1.2\r\nUser: %s\r\nContent-length: %ld\r\n\r\n",
           user_name,
           mbox_size);

  /* send our request */
  if (send(spamd_sock, spamd_buffer, Ustrlen(spamd_buffer), 0) < 0) {
    (void)close(spamd_sock);
    log_write(0, LOG_MAIN|LOG_PANIC,
         "spam acl condition: spamd send failed: %s", strerror(errno));
    (void)fclose(mbox_file);
    (void)close(spamd_sock);
    return DEFER;
  };

  /* now send the file */
  /* spamd sometimes accepts conections but doesn't read data off
   * the connection.  We make the file descriptor non-blocking so
   * that the write will only write sufficient data without blocking
   * and we poll the desciptor to make sure that we can write without
   * blocking.  Short writes are gracefully handled and if the whole
   * trasaction takes too long it is aborted.
   * Note: poll() is not supported in OSX 10.2 and is reported to be
   *       broken in more recent versions (up to 10.4).
   */
#ifndef NO_POLL_H
  pollfd.fd = spamd_sock;
  pollfd.events = POLLOUT;
#endif
  (void)fcntl(spamd_sock, F_SETFL, O_NONBLOCK);
  do {
    read = fread(spamd_buffer,1,sizeof(spamd_buffer),mbox_file);
    if (read > 0) {
      offset = 0;
again:
#ifndef NO_POLL_H
      result = poll(&pollfd, 1, 1000);

/* Patch posted by Erik ? for OS X and applied by PH */
#else
      select_tv.tv_sec = 1;
      select_tv.tv_usec = 0;
      FD_ZERO(&select_fd);
      FD_SET(spamd_sock, &select_fd);
      result = select(spamd_sock+1, NULL, &select_fd, NULL, &select_tv);
#endif
/* End Erik's patch */

      if (result == -1 && errno == EINTR)
        goto again;
      else if (result < 1) {
        if (result == -1)
          log_write(0, LOG_MAIN|LOG_PANIC,
            "spam acl condition: %s on spamd socket", strerror(errno));
        else {
          if (time(NULL) - start < SPAMD_TIMEOUT)
          goto again;
          log_write(0, LOG_MAIN|LOG_PANIC,
            "spam acl condition: timed out writing spamd socket");
        }
        (void)close(spamd_sock);
        (void)fclose(mbox_file);
        return DEFER;
      }

      wrote = send(spamd_sock,spamd_buffer + offset,read - offset,0);
      if (wrote == -1)
      {
          log_write(0, LOG_MAIN|LOG_PANIC,
            "spam acl condition: %s on spamd socket", strerror(errno));
        (void)close(spamd_sock);
        (void)fclose(mbox_file);
        return DEFER;
      }
      if (offset + wrote != read) {
        offset += wrote;
        goto again;
      }
    }
  }
  while (!feof(mbox_file) && !ferror(mbox_file));
  if (ferror(mbox_file)) {
    log_write(0, LOG_MAIN|LOG_PANIC,
      "spam acl condition: error reading spool file: %s", strerror(errno));
    (void)close(spamd_sock);
    (void)fclose(mbox_file);
    return DEFER;
  }

  (void)fclose(mbox_file);

  /* we're done sending, close socket for writing */
  shutdown(spamd_sock,SHUT_WR);

  /* read spamd response using what's left of the timeout.
   */
  memset(spamd_buffer, 0, sizeof(spamd_buffer));
  offset = 0;
  while((i = ip_recv(spamd_sock,
                     spamd_buffer + offset,
                     sizeof(spamd_buffer) - offset - 1,
                     SPAMD_TIMEOUT - time(NULL) + start)) > 0 ) {
    offset += i;
  }

  /* error handling */
  if((i <= 0) && (errno != 0)) {
    log_write(0, LOG_MAIN|LOG_PANIC,
         "spam acl condition: error reading from spamd socket: %s", strerror(errno));
    (void)close(spamd_sock);
    return DEFER;
  }

  /* reading done */
  (void)close(spamd_sock);

  /* dig in the spamd output and put the report in a multiline header, if requested */
  if( sscanf(CS spamd_buffer,"SPAMD/%7s 0 EX_OK\r\nContent-length: %*u\r\n\r\n%lf/%lf\r\n%n",
             spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3 ) {

    /* try to fall back to pre-2.50 spamd output */
    if( sscanf(CS spamd_buffer,"SPAMD/%7s 0 EX_OK\r\nSpam: %*s ; %lf / %lf\r\n\r\n%n",
               spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3 ) {
      log_write(0, LOG_MAIN|LOG_PANIC,
         "spam acl condition: cannot parse spamd output");
      return DEFER;
    };
  };

  /* Create report. Since this is a multiline string,
  we must hack it into shape first */
  p = &spamd_buffer[spamd_report_offset];
  q = spam_report_buffer;
  while (*p != '\0') {
    /* skip \r */
    if (*p == '\r') {
      p++;
      continue;
    };
    *q = *p;
    q++;
    if (*p == '\n') {
      /* add an extra space after the newline to ensure
      that it is treated as a header continuation line */
      *q = ' ';
      q++;
    };
    p++;
  };
  /* NULL-terminate */
  *q = '\0';
  q--;
  /* cut off trailing leftovers */
  while (*q <= ' ') {
    *q = '\0';
    q--;
  };
  spam_report = spam_report_buffer;

  /* create spam bar */
  spamd_score_char = spamd_score > 0 ? '+' : '-';
  j = abs((int)(spamd_score));
  i = 0;
  if( j != 0 ) {
    while((i < j) && (i <= MAX_SPAM_BAR_CHARS))
       spam_bar_buffer[i++] = spamd_score_char;
  }
  else{
    spam_bar_buffer[0] = '/';
    i = 1;
  }
  spam_bar_buffer[i] = '\0';
  spam_bar = spam_bar_buffer;

  /* create "float" spam score */
  (void)string_format(spam_score_buffer, sizeof(spam_score_buffer),"%.1f", spamd_score);
  spam_score = spam_score_buffer;

  /* create "int" spam score */
  j = (int)((spamd_score + 0.001)*10);
  (void)string_format(spam_score_int_buffer, sizeof(spam_score_int_buffer), "%d", j);
  spam_score_int = spam_score_int_buffer;

  /* compare threshold against score */
  if (spamd_score >= spamd_threshold) {
    /* spam as determined by user's threshold */
    spam_rc = OK;
  }
  else {
    /* not spam */
    spam_rc = FAIL;
  };

  /* remember user name and "been here" for it unless spamd_socket was expanded */
  if (spamd_address_work == spamd_address) {
    Ustrcpy(prev_user_name, user_name);
    spam_ok = 1;
  }

  if (override) {
    /* always return OK, no matter what the score */
    return OK;
  }
  else {
    return spam_rc;
  };
}

#endif
Commit	Line	Data
89dec7b6	1	/* $Cambridge: exim/src/src/spam.c,v 1.17 2008/07/18 17:55:42 fanf2 Exp $ */
8523533c TK	2
	3	/*************************************************
	4	* Exim - an Internet mail transport agent *
	5	*************************************************/
	6
	7	/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */
	8	/* License: GPL */
	9
	10	/* Code for calling spamassassin's spamd. Called from acl.c. */
	11
	12	#include "exim.h"
	13	#ifdef WITH_CONTENT_SCAN
	14	#include "spam.h"
	15
	16	uschar spam_score_buffer[16];
	17	uschar spam_score_int_buffer[16];
	18	uschar spam_bar_buffer[128];
	19	uschar spam_report_buffer[32600];
	20	uschar prev_user_name[128] = "";
	21	int spam_ok = 0;
	22	int spam_rc = 0;
	23
	24	int spam(uschar **listptr) {
	25	int sep = 0;
	26	uschar list = listptr;
	27	uschar *user_name;
	28	uschar user_name_buffer[128];
f7b63901	29	unsigned long mbox_size;
8523533c TK	30	FILE *mbox_file;
	31	int spamd_sock;
	32	uschar spamd_buffer[32600];
cfe75fc3	33	int i, j, offset, result;
8523533c TK	34	uschar spamd_version[8];
	35	uschar spamd_score_char;
	36	double spamd_threshold, spamd_score;
	37	int spamd_report_offset;
	38	uschar p,q;
	39	int override = 0;
cfe75fc3 PH	40	time_t start;
cfe75fc3 PH	41	size_t read, wrote;
8523533c	42	struct sockaddr_un server;
f452e07e	43	#ifndef NO_POLL_H
cfe75fc3	44	struct pollfd pollfd;
25257489 PH	45	#else /* Patch posted by Erik ? for OS X */
	46	struct timeval select_tv; /* and applied by PH */
	47	fd_set select_fd;
f452e07e	48	#endif
b6e6e716	49	uschar *spamd_address_work;
8523533c	50
5614ee86	51	/* stop compiler warning */
91ecef39	52	result = 0;
5614ee86	53
8523533c TK	54	/* find the username from the option list */
	55	if ((user_name = string_nextinlist(&list, &sep,
	56	user_name_buffer,
	57	sizeof(user_name_buffer))) == NULL) {
	58	/* no username given, this means no scanning should be done */
	59	return FAIL;
	60	};
	61
	62	/* if username is "0" or "false", do not scan */
	63	if ( (Ustrcmp(user_name,"0") == 0) \|\|
	64	(strcmpic(user_name,US"false") == 0) ) {
	65	return FAIL;
	66	};
	67
	68	/* if there is an additional option, check if it is "true" */
	69	if (strcmpic(list,US"true") == 0) {
	70	/* in that case, always return true later */
	71	override = 1;
	72	};
	73
8e669ac1	74	/* if we scanned for this username last time, just return */
8523533c TK	75	if ( spam_ok && ( Ustrcmp(prev_user_name, user_name) == 0 ) ) {
	76	if (override)
	77	return OK;
	78	else
	79	return spam_rc;
	80	};
8e669ac1	81
8523533c TK	82	/* make sure the eml mbox file is spooled up */
8523533c TK	83	mbox_file = spool_mbox(&mbox_size);
8e669ac1	84
8523533c TK	85	if (mbox_file == NULL) {
	86	/* error while spooling */
	87	log_write(0, LOG_MAIN\|LOG_PANIC,
	88	"spam acl condition: error while creating mbox spool file");
	89	return DEFER;
	90	};
	91
cfe75fc3	92	start = time(NULL);
b6e6e716 TK	93
	94	if (*spamd_address == '$') {
	95	spamd_address_work = expand_string(spamd_address);
	96	if (spamd_address_work == NULL) {
	97	log_write(0, LOG_MAIN\|LOG_PANIC,
	98	"spamassassin acl condition: spamd_address starts with $, but expansion failed: %s", expand_string_message);
	99	return DEFER;
	100	}
	101	}
	102	else
	103	spamd_address_work = spamd_address;
	104
8523533c	105	/* socket does not start with '/' -> network socket */
b6e6e716	106	if (*spamd_address_work != '/') {
8523533c TK	107	time_t now = time(NULL);
	108	int num_servers = 0;
	109	int current_server = 0;
	110	int start_server = 0;
	111	uschar *address = NULL;
e1e7cfcb	112	uschar *spamd_address_list_ptr = spamd_address_work;
8523533c TK	113	uschar address_buffer[256];
	114	spamd_address_container * spamd_address_vector[32];
	115
	116	/* Check how many spamd servers we have
	117	and register their addresses */
	118	while ((address = string_nextinlist(&spamd_address_list_ptr, &sep,
	119	address_buffer,
	120	sizeof(address_buffer))) != NULL) {
8e669ac1	121
8523533c TK	122	spamd_address_container *this_spamd =
8523533c TK	123	(spamd_address_container *)store_get(sizeof(spamd_address_container));
8e669ac1	124
8523533c TK	125	/* grok spamd address and port */
	126	if( sscanf(CS address, "%s %u", this_spamd->tcp_addr, &(this_spamd->tcp_port)) != 2 ) {
	127	log_write(0, LOG_MAIN,
	128	"spam acl condition: warning - invalid spamd address: '%s'", address);
	129	continue;
	130	};
8e669ac1	131
8523533c TK	132	spamd_address_vector[num_servers] = this_spamd;
	133	num_servers++;
	134	if (num_servers > 31)
	135	break;
	136	};
8e669ac1	137
8523533c TK	138	/* check if we have at least one server */
	139	if (!num_servers) {
	140	log_write(0, LOG_MAIN\|LOG_PANIC,
	141	"spam acl condition: no useable spamd server addresses in spamd_address configuration option.");
f1e894f3	142	(void)fclose(mbox_file);
8523533c TK	143	return DEFER;
	144	};
	145
	146	current_server = start_server = (int)now % num_servers;
	147
	148	while (1) {
8e669ac1	149
8523533c TK	150	debug_printf("trying server %s, port %u\n",
	151	spamd_address_vector[current_server]->tcp_addr,
	152	spamd_address_vector[current_server]->tcp_port);
8e669ac1	153
8523533c TK	154	/* contact a spamd */
	155	if ( (spamd_sock = ip_socket(SOCK_STREAM, AF_INET)) < 0) {
	156	log_write(0, LOG_MAIN\|LOG_PANIC,
	157	"spam acl condition: error creating IP socket for spamd");
f1e894f3	158	(void)fclose(mbox_file);
8e669ac1	159	return DEFER;
8523533c	160	};
8e669ac1	161
8523533c TK	162	if (ip_connect( spamd_sock,
	163	AF_INET,
	164	spamd_address_vector[current_server]->tcp_addr,
	165	spamd_address_vector[current_server]->tcp_port,
	166	5 ) > -1) {
	167	/* connection OK */
	168	break;
	169	};
8e669ac1	170
8523533c TK	171	log_write(0, LOG_MAIN\|LOG_PANIC,
	172	"spam acl condition: warning - spamd connection to %s, port %u failed: %s",
	173	spamd_address_vector[current_server]->tcp_addr,
	174	spamd_address_vector[current_server]->tcp_port,
	175	strerror(errno));
	176	current_server++;
	177	if (current_server >= num_servers)
	178	current_server = 0;
	179	if (current_server == start_server) {
	180	log_write(0, LOG_MAIN\|LOG_PANIC, "spam acl condition: all spamd servers failed");
f1e894f3 PH	181	(void)fclose(mbox_file);
f1e894f3 PH	182	(void)close(spamd_sock);
8523533c TK	183	return DEFER;
	184	};
	185	};
	186
	187	}
	188	else {
	189	/* open the local socket */
	190
	191	if ((spamd_sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
	192	log_write(0, LOG_MAIN\|LOG_PANIC,
	193	"malware acl condition: spamd: unable to acquire socket (%s)",
	194	strerror(errno));
f1e894f3	195	(void)fclose(mbox_file);
8523533c TK	196	return DEFER;
	197	}
	198
	199	server.sun_family = AF_UNIX;
b6e6e716	200	Ustrcpy(server.sun_path, spamd_address_work);
8523533c TK	201
	202	if (connect(spamd_sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
	203	log_write(0, LOG_MAIN\|LOG_PANIC,
	204	"malware acl condition: spamd: unable to connect to UNIX socket %s (%s)",
b6e6e716	205	spamd_address_work, strerror(errno) );
f1e894f3 PH	206	(void)fclose(mbox_file);
f1e894f3 PH	207	(void)close(spamd_sock);
8523533c TK	208	return DEFER;
	209	}
	210
	211	}
	212
	213	/* now we are connected to spamd on spamd_sock */
b07e6aa3	214	(void)string_format(spamd_buffer,
8523533c	215	sizeof(spamd_buffer),
f7b63901	216	"REPORT SPAMC/1.2\r\nUser: %s\r\nContent-length: %ld\r\n\r\n",
8523533c TK	217	user_name,
	218	mbox_size);
	219
	220	/* send our request */
	221	if (send(spamd_sock, spamd_buffer, Ustrlen(spamd_buffer), 0) < 0) {
f1e894f3	222	(void)close(spamd_sock);
8523533c TK	223	log_write(0, LOG_MAIN\|LOG_PANIC,
8523533c TK	224	"spam acl condition: spamd send failed: %s", strerror(errno));
f1e894f3 PH	225	(void)fclose(mbox_file);
f1e894f3 PH	226	(void)close(spamd_sock);
8523533c TK	227	return DEFER;
	228	};
	229
	230	/* now send the file */
cfe75fc3 PH	231	/* spamd sometimes accepts conections but doesn't read data off
	232	* the connection. We make the file descriptor non-blocking so
	233	* that the write will only write sufficient data without blocking
	234	* and we poll the desciptor to make sure that we can write without
	235	* blocking. Short writes are gracefully handled and if the whole
	236	* trasaction takes too long it is aborted.
25257489 PH	237	* Note: poll() is not supported in OSX 10.2 and is reported to be
25257489 PH	238	* broken in more recent versions (up to 10.4).
cfe75fc3	239	*/
f452e07e	240	#ifndef NO_POLL_H
cfe75fc3 PH	241	pollfd.fd = spamd_sock;
cfe75fc3 PH	242	pollfd.events = POLLOUT;
f452e07e	243	#endif
ff790e47	244	(void)fcntl(spamd_sock, F_SETFL, O_NONBLOCK);
8523533c	245	do {
cfe75fc3 PH	246	read = fread(spamd_buffer,1,sizeof(spamd_buffer),mbox_file);
	247	if (read > 0) {
	248	offset = 0;
	249	again:
f452e07e	250	#ifndef NO_POLL_H
cfe75fc3	251	result = poll(&pollfd, 1, 1000);
25257489 PH	252
	253	/* Patch posted by Erik ? for OS X and applied by PH */
	254	#else
	255	select_tv.tv_sec = 1;
	256	select_tv.tv_usec = 0;
	257	FD_ZERO(&select_fd);
	258	FD_SET(spamd_sock, &select_fd);
	259	result = select(spamd_sock+1, NULL, &select_fd, NULL, &select_tv);
	260	#endif
	261	/* End Erik's patch */
	262
cfe75fc3	263	if (result == -1 && errno == EINTR)
25257489	264	goto again;
cfe75fc3 PH	265	else if (result < 1) {
	266	if (result == -1)
	267	log_write(0, LOG_MAIN\|LOG_PANIC,
	268	"spam acl condition: %s on spamd socket", strerror(errno));
	269	else {
	270	if (time(NULL) - start < SPAMD_TIMEOUT)
	271	goto again;
	272	log_write(0, LOG_MAIN\|LOG_PANIC,
	273	"spam acl condition: timed out writing spamd socket");
	274	}
f1e894f3 PH	275	(void)close(spamd_sock);
f1e894f3 PH	276	(void)fclose(mbox_file);
8523533c	277	return DEFER;
cfe75fc3	278	}
25257489	279
cfe75fc3	280	wrote = send(spamd_sock,spamd_buffer + offset,read - offset,0);
8d7d227d TK	281	if (wrote == -1)
	282	{
	283	log_write(0, LOG_MAIN\|LOG_PANIC,
	284	"spam acl condition: %s on spamd socket", strerror(errno));
f1e894f3 PH	285	(void)close(spamd_sock);
f1e894f3 PH	286	(void)fclose(mbox_file);
8d7d227d TK	287	return DEFER;
8d7d227d TK	288	}
cfe75fc3 PH	289	if (offset + wrote != read) {
	290	offset += wrote;
	291	goto again;
	292	}
	293	}
	294	}
	295	while (!feof(mbox_file) && !ferror(mbox_file));
	296	if (ferror(mbox_file)) {
	297	log_write(0, LOG_MAIN\|LOG_PANIC,
	298	"spam acl condition: error reading spool file: %s", strerror(errno));
f1e894f3 PH	299	(void)close(spamd_sock);
f1e894f3 PH	300	(void)fclose(mbox_file);
cfe75fc3	301	return DEFER;
8523533c	302	}
8523533c	303
f1e894f3	304	(void)fclose(mbox_file);
8523533c TK	305
	306	/* we're done sending, close socket for writing */
	307	shutdown(spamd_sock,SHUT_WR);
8e669ac1	308
cfe75fc3 PH	309	/* read spamd response using what's left of the timeout.
cfe75fc3 PH	310	*/
8523533c TK	311	memset(spamd_buffer, 0, sizeof(spamd_buffer));
	312	offset = 0;
	313	while((i = ip_recv(spamd_sock,
	314	spamd_buffer + offset,
	315	sizeof(spamd_buffer) - offset - 1,
cfe75fc3	316	SPAMD_TIMEOUT - time(NULL) + start)) > 0 ) {
8523533c TK	317	offset += i;
	318	}
	319
	320	/* error handling */
	321	if((i <= 0) && (errno != 0)) {
	322	log_write(0, LOG_MAIN\|LOG_PANIC,
	323	"spam acl condition: error reading from spamd socket: %s", strerror(errno));
f1e894f3	324	(void)close(spamd_sock);
8523533c TK	325	return DEFER;
	326	}
	327
	328	/* reading done */
f1e894f3	329	(void)close(spamd_sock);
8523533c TK	330
8523533c TK	331	/* dig in the spamd output and put the report in a multiline header, if requested */
0806a9c5	332	if( sscanf(CS spamd_buffer,"SPAMD/%7s 0 EX_OK\r\nContent-length: %*u\r\n\r\n%lf/%lf\r\n%n",
8523533c	333	spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3 ) {
8e669ac1	334
8523533c	335	/* try to fall back to pre-2.50 spamd output */
0806a9c5	336	if( sscanf(CS spamd_buffer,"SPAMD/%7s 0 EX_OK\r\nSpam: %*s ; %lf / %lf\r\n\r\n%n",
8523533c TK	337	spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3 ) {
	338	log_write(0, LOG_MAIN\|LOG_PANIC,
	339	"spam acl condition: cannot parse spamd output");
	340	return DEFER;
	341	};
	342	};
	343
	344	/* Create report. Since this is a multiline string,
	345	we must hack it into shape first */
	346	p = &spamd_buffer[spamd_report_offset];
	347	q = spam_report_buffer;
	348	while (*p != '\0') {
	349	/* skip \r */
	350	if (*p == '\r') {
	351	p++;
	352	continue;
	353	};
	354	q = p;
	355	q++;
	356	if (*p == '\n') {
89dec7b6 TF	357	/* add an extra space after the newline to ensure
	358	that it is treated as a header continuation line */
	359	*q = ' ';
8523533c	360	q++;
8523533c TK	361	};
	362	p++;
	363	};
	364	/* NULL-terminate */
	365	*q = '\0';
	366	q--;
	367	/* cut off trailing leftovers */
	368	while (*q <= ' ') {
	369	*q = '\0';
	370	q--;
	371	};
	372	spam_report = spam_report_buffer;
	373
	374	/* create spam bar */
	375	spamd_score_char = spamd_score > 0 ? '+' : '-';
	376	j = abs((int)(spamd_score));
	377	i = 0;
	378	if( j != 0 ) {
	379	while((i < j) && (i <= MAX_SPAM_BAR_CHARS))
	380	spam_bar_buffer[i++] = spamd_score_char;
	381	}
	382	else{
	383	spam_bar_buffer[0] = '/';
	384	i = 1;
	385	}
	386	spam_bar_buffer[i] = '\0';
	387	spam_bar = spam_bar_buffer;
	388
	389	/* create "float" spam score */
b07e6aa3	390	(void)string_format(spam_score_buffer, sizeof(spam_score_buffer),"%.1f", spamd_score);
8523533c TK	391	spam_score = spam_score_buffer;
	392
	393	/* create "int" spam score */
	394	j = (int)((spamd_score + 0.001)*10);
b07e6aa3	395	(void)string_format(spam_score_int_buffer, sizeof(spam_score_int_buffer), "%d", j);
8523533c TK	396	spam_score_int = spam_score_int_buffer;
	397
	398	/* compare threshold against score */
	399	if (spamd_score >= spamd_threshold) {
	400	/* spam as determined by user's threshold */
	401	spam_rc = OK;
	402	}
	403	else {
	404	/* not spam */
	405	spam_rc = FAIL;
	406	};
8e669ac1	407
b6e6e716 TK	408	/* remember user name and "been here" for it unless spamd_socket was expanded */
	409	if (spamd_address_work == spamd_address) {
	410	Ustrcpy(prev_user_name, user_name);
	411	spam_ok = 1;
	412	}
8e669ac1	413
8523533c TK	414	if (override) {
	415	/* always return OK, no matter what the score */
	416	return OK;
	417	}
	418	else {
	419	return spam_rc;
	420	};
	421	}
	422
	423	#endif