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

/* $Cambridge: exim/src/src/spam.c,v 1.11 2005/08/01 14:41:25 ph10 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;
#endif

  /* stop compiler warning */
  result = result;

  /* 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);
  /* socket does not start with '/' -> network socket */
  if (*spamd_address != '/') {
    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;
    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);

    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, 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.
   */
#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);
      if (result == -1 && errno == EINTR)
        continue;
      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;
      }
#endif
      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/%s 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/%s 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') {
      *q = '\t';
      q++;
      /* eat whitespace */
      while( (*p <= ' ') && (*p != '\0') ) {
        p++;
      };
      p--;
    };
    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 */
  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
b07e6aa3	1	/* $Cambridge: exim/src/src/spam.c,v 1.11 2005/08/01 14:41:25 ph10 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;
f452e07e	45	#endif
8523533c	46
5614ee86 TK	47	/* stop compiler warning */
	48	result = result;
	49
8523533c TK	50	/* find the username from the option list */
	51	if ((user_name = string_nextinlist(&list, &sep,
	52	user_name_buffer,
	53	sizeof(user_name_buffer))) == NULL) {
	54	/* no username given, this means no scanning should be done */
	55	return FAIL;
	56	};
	57
	58	/* if username is "0" or "false", do not scan */
	59	if ( (Ustrcmp(user_name,"0") == 0) \|\|
	60	(strcmpic(user_name,US"false") == 0) ) {
	61	return FAIL;
	62	};
	63
	64	/* if there is an additional option, check if it is "true" */
	65	if (strcmpic(list,US"true") == 0) {
	66	/* in that case, always return true later */
	67	override = 1;
	68	};
	69
8e669ac1	70	/* if we scanned for this username last time, just return */
8523533c TK	71	if ( spam_ok && ( Ustrcmp(prev_user_name, user_name) == 0 ) ) {
	72	if (override)
	73	return OK;
	74	else
	75	return spam_rc;
	76	};
8e669ac1	77
8523533c TK	78	/* make sure the eml mbox file is spooled up */
8523533c TK	79	mbox_file = spool_mbox(&mbox_size);
8e669ac1	80
8523533c TK	81	if (mbox_file == NULL) {
	82	/* error while spooling */
	83	log_write(0, LOG_MAIN\|LOG_PANIC,
	84	"spam acl condition: error while creating mbox spool file");
	85	return DEFER;
	86	};
	87
cfe75fc3	88	start = time(NULL);
8523533c TK	89	/* socket does not start with '/' -> network socket */
	90	if (*spamd_address != '/') {
	91	time_t now = time(NULL);
	92	int num_servers = 0;
	93	int current_server = 0;
	94	int start_server = 0;
	95	uschar *address = NULL;
	96	uschar *spamd_address_list_ptr = spamd_address;
	97	uschar address_buffer[256];
	98	spamd_address_container * spamd_address_vector[32];
	99
	100	/* Check how many spamd servers we have
	101	and register their addresses */
	102	while ((address = string_nextinlist(&spamd_address_list_ptr, &sep,
	103	address_buffer,
	104	sizeof(address_buffer))) != NULL) {
8e669ac1	105
8523533c TK	106	spamd_address_container *this_spamd =
8523533c TK	107	(spamd_address_container *)store_get(sizeof(spamd_address_container));
8e669ac1	108
8523533c TK	109	/* grok spamd address and port */
	110	if( sscanf(CS address, "%s %u", this_spamd->tcp_addr, &(this_spamd->tcp_port)) != 2 ) {
	111	log_write(0, LOG_MAIN,
	112	"spam acl condition: warning - invalid spamd address: '%s'", address);
	113	continue;
	114	};
8e669ac1	115
8523533c TK	116	spamd_address_vector[num_servers] = this_spamd;
	117	num_servers++;
	118	if (num_servers > 31)
	119	break;
	120	};
8e669ac1	121
8523533c TK	122	/* check if we have at least one server */
	123	if (!num_servers) {
	124	log_write(0, LOG_MAIN\|LOG_PANIC,
	125	"spam acl condition: no useable spamd server addresses in spamd_address configuration option.");
f1e894f3	126	(void)fclose(mbox_file);
8523533c TK	127	return DEFER;
	128	};
	129
	130	current_server = start_server = (int)now % num_servers;
	131
	132	while (1) {
8e669ac1	133
8523533c TK	134	debug_printf("trying server %s, port %u\n",
	135	spamd_address_vector[current_server]->tcp_addr,
	136	spamd_address_vector[current_server]->tcp_port);
8e669ac1	137
8523533c TK	138	/* contact a spamd */
	139	if ( (spamd_sock = ip_socket(SOCK_STREAM, AF_INET)) < 0) {
	140	log_write(0, LOG_MAIN\|LOG_PANIC,
	141	"spam acl condition: error creating IP socket for spamd");
f1e894f3	142	(void)fclose(mbox_file);
8e669ac1	143	return DEFER;
8523533c	144	};
8e669ac1	145
8523533c TK	146	if (ip_connect( spamd_sock,
	147	AF_INET,
	148	spamd_address_vector[current_server]->tcp_addr,
	149	spamd_address_vector[current_server]->tcp_port,
	150	5 ) > -1) {
	151	/* connection OK */
	152	break;
	153	};
8e669ac1	154
8523533c TK	155	log_write(0, LOG_MAIN\|LOG_PANIC,
	156	"spam acl condition: warning - spamd connection to %s, port %u failed: %s",
	157	spamd_address_vector[current_server]->tcp_addr,
	158	spamd_address_vector[current_server]->tcp_port,
	159	strerror(errno));
	160	current_server++;
	161	if (current_server >= num_servers)
	162	current_server = 0;
	163	if (current_server == start_server) {
	164	log_write(0, LOG_MAIN\|LOG_PANIC, "spam acl condition: all spamd servers failed");
f1e894f3 PH	165	(void)fclose(mbox_file);
f1e894f3 PH	166	(void)close(spamd_sock);
8523533c TK	167	return DEFER;
	168	};
	169	};
	170
	171	}
	172	else {
	173	/* open the local socket */
	174
	175	if ((spamd_sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
	176	log_write(0, LOG_MAIN\|LOG_PANIC,
	177	"malware acl condition: spamd: unable to acquire socket (%s)",
	178	strerror(errno));
f1e894f3	179	(void)fclose(mbox_file);
8523533c TK	180	return DEFER;
	181	}
	182
	183	server.sun_family = AF_UNIX;
	184	Ustrcpy(server.sun_path, spamd_address);
	185
	186	if (connect(spamd_sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
	187	log_write(0, LOG_MAIN\|LOG_PANIC,
	188	"malware acl condition: spamd: unable to connect to UNIX socket %s (%s)",
	189	spamd_address, strerror(errno) );
f1e894f3 PH	190	(void)fclose(mbox_file);
f1e894f3 PH	191	(void)close(spamd_sock);
8523533c TK	192	return DEFER;
	193	}
	194
	195	}
	196
	197	/* now we are connected to spamd on spamd_sock */
b07e6aa3	198	(void)string_format(spamd_buffer,
8523533c	199	sizeof(spamd_buffer),
f7b63901	200	"REPORT SPAMC/1.2\r\nUser: %s\r\nContent-length: %ld\r\n\r\n",
8523533c TK	201	user_name,
	202	mbox_size);
	203
	204	/* send our request */
	205	if (send(spamd_sock, spamd_buffer, Ustrlen(spamd_buffer), 0) < 0) {
f1e894f3	206	(void)close(spamd_sock);
8523533c TK	207	log_write(0, LOG_MAIN\|LOG_PANIC,
8523533c TK	208	"spam acl condition: spamd send failed: %s", strerror(errno));
f1e894f3 PH	209	(void)fclose(mbox_file);
f1e894f3 PH	210	(void)close(spamd_sock);
8523533c TK	211	return DEFER;
	212	};
	213
	214	/* now send the file */
cfe75fc3 PH	215	/* spamd sometimes accepts conections but doesn't read data off
	216	* the connection. We make the file descriptor non-blocking so
	217	* that the write will only write sufficient data without blocking
	218	* and we poll the desciptor to make sure that we can write without
	219	* blocking. Short writes are gracefully handled and if the whole
	220	* trasaction takes too long it is aborted.
f452e07e	221	* Note: poll() is not supported in OSX 10.2.
cfe75fc3	222	*/
f452e07e	223	#ifndef NO_POLL_H
cfe75fc3 PH	224	pollfd.fd = spamd_sock;
cfe75fc3 PH	225	pollfd.events = POLLOUT;
f452e07e	226	#endif
ff790e47	227	(void)fcntl(spamd_sock, F_SETFL, O_NONBLOCK);
8523533c	228	do {
cfe75fc3 PH	229	read = fread(spamd_buffer,1,sizeof(spamd_buffer),mbox_file);
	230	if (read > 0) {
	231	offset = 0;
	232	again:
f452e07e	233	#ifndef NO_POLL_H
cfe75fc3 PH	234	result = poll(&pollfd, 1, 1000);
	235	if (result == -1 && errno == EINTR)
	236	continue;
	237	else if (result < 1) {
	238	if (result == -1)
	239	log_write(0, LOG_MAIN\|LOG_PANIC,
	240	"spam acl condition: %s on spamd socket", strerror(errno));
	241	else {
	242	if (time(NULL) - start < SPAMD_TIMEOUT)
	243	goto again;
	244	log_write(0, LOG_MAIN\|LOG_PANIC,
	245	"spam acl condition: timed out writing spamd socket");
	246	}
f1e894f3 PH	247	(void)close(spamd_sock);
f1e894f3 PH	248	(void)fclose(mbox_file);
8523533c	249	return DEFER;
cfe75fc3	250	}
f452e07e	251	#endif
cfe75fc3	252	wrote = send(spamd_sock,spamd_buffer + offset,read - offset,0);
8d7d227d TK	253	if (wrote == -1)
	254	{
	255	log_write(0, LOG_MAIN\|LOG_PANIC,
	256	"spam acl condition: %s on spamd socket", strerror(errno));
f1e894f3 PH	257	(void)close(spamd_sock);
f1e894f3 PH	258	(void)fclose(mbox_file);
8d7d227d TK	259	return DEFER;
8d7d227d TK	260	}
cfe75fc3 PH	261	if (offset + wrote != read) {
	262	offset += wrote;
	263	goto again;
	264	}
	265	}
	266	}
	267	while (!feof(mbox_file) && !ferror(mbox_file));
	268	if (ferror(mbox_file)) {
	269	log_write(0, LOG_MAIN\|LOG_PANIC,
	270	"spam acl condition: error reading spool file: %s", strerror(errno));
f1e894f3 PH	271	(void)close(spamd_sock);
f1e894f3 PH	272	(void)fclose(mbox_file);
cfe75fc3	273	return DEFER;
8523533c	274	}
8523533c	275
f1e894f3	276	(void)fclose(mbox_file);
8523533c TK	277
	278	/* we're done sending, close socket for writing */
	279	shutdown(spamd_sock,SHUT_WR);
8e669ac1	280
cfe75fc3 PH	281	/* read spamd response using what's left of the timeout.
cfe75fc3 PH	282	*/
8523533c TK	283	memset(spamd_buffer, 0, sizeof(spamd_buffer));
	284	offset = 0;
	285	while((i = ip_recv(spamd_sock,
	286	spamd_buffer + offset,
	287	sizeof(spamd_buffer) - offset - 1,
cfe75fc3	288	SPAMD_TIMEOUT - time(NULL) + start)) > 0 ) {
8523533c TK	289	offset += i;
	290	}
	291
	292	/* error handling */
	293	if((i <= 0) && (errno != 0)) {
	294	log_write(0, LOG_MAIN\|LOG_PANIC,
	295	"spam acl condition: error reading from spamd socket: %s", strerror(errno));
f1e894f3	296	(void)close(spamd_sock);
8523533c TK	297	return DEFER;
	298	}
	299
	300	/* reading done */
f1e894f3	301	(void)close(spamd_sock);
8523533c TK	302
	303	/* dig in the spamd output and put the report in a multiline header, if requested */
	304	if( sscanf(CS spamd_buffer,"SPAMD/%s 0 EX_OK\r\nContent-length: %*u\r\n\r\n%lf/%lf\r\n%n",
	305	spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3 ) {
8e669ac1	306
8523533c TK	307	/* try to fall back to pre-2.50 spamd output */
	308	if( sscanf(CS spamd_buffer,"SPAMD/%s 0 EX_OK\r\nSpam: %*s ; %lf / %lf\r\n\r\n%n",
	309	spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3 ) {
	310	log_write(0, LOG_MAIN\|LOG_PANIC,
	311	"spam acl condition: cannot parse spamd output");
	312	return DEFER;
	313	};
	314	};
	315
	316	/* Create report. Since this is a multiline string,
	317	we must hack it into shape first */
	318	p = &spamd_buffer[spamd_report_offset];
	319	q = spam_report_buffer;
	320	while (*p != '\0') {
	321	/* skip \r */
	322	if (*p == '\r') {
	323	p++;
	324	continue;
	325	};
	326	q = p;
	327	q++;
	328	if (*p == '\n') {
	329	*q = '\t';
	330	q++;
	331	/* eat whitespace */
	332	while( (p <= ' ') && (p != '\0') ) {
	333	p++;
	334	};
	335	p--;
	336	};
	337	p++;
	338	};
	339	/* NULL-terminate */
	340	*q = '\0';
	341	q--;
	342	/* cut off trailing leftovers */
	343	while (*q <= ' ') {
	344	*q = '\0';
	345	q--;
	346	};
	347	spam_report = spam_report_buffer;
	348
	349	/* create spam bar */
	350	spamd_score_char = spamd_score > 0 ? '+' : '-';
	351	j = abs((int)(spamd_score));
	352	i = 0;
	353	if( j != 0 ) {
	354	while((i < j) && (i <= MAX_SPAM_BAR_CHARS))
	355	spam_bar_buffer[i++] = spamd_score_char;
	356	}
	357	else{
	358	spam_bar_buffer[0] = '/';
	359	i = 1;
	360	}
	361	spam_bar_buffer[i] = '\0';
	362	spam_bar = spam_bar_buffer;
	363
	364	/* create "float" spam score */
b07e6aa3	365	(void)string_format(spam_score_buffer, sizeof(spam_score_buffer),"%.1f", spamd_score);
8523533c TK	366	spam_score = spam_score_buffer;
	367
	368	/* create "int" spam score */
	369	j = (int)((spamd_score + 0.001)*10);
b07e6aa3	370	(void)string_format(spam_score_int_buffer, sizeof(spam_score_int_buffer), "%d", j);
8523533c TK	371	spam_score_int = spam_score_int_buffer;
	372
	373	/* compare threshold against score */
	374	if (spamd_score >= spamd_threshold) {
	375	/* spam as determined by user's threshold */
	376	spam_rc = OK;
	377	}
	378	else {
	379	/* not spam */
	380	spam_rc = FAIL;
	381	};
8e669ac1	382
8523533c TK	383	/* remember user name and "been here" for it */
	384	Ustrcpy(prev_user_name, user_name);
	385	spam_ok = 1;
8e669ac1	386
8523533c TK	387	if (override) {
	388	/* always return OK, no matter what the score */
	389	return OK;
	390	}
	391	else {
	392	return spam_rc;
	393	};
	394	}
	395
	396	#endif