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

/*************************************************
*     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;
uschar *prev_spamd_address_work = NULL;

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;
  };

  /* expand spamd_address if needed */
  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;

  /* check if previous spamd_address was expanded and has changed. dump cached results if so */
  if ( spam_ok && ( prev_spamd_address_work != NULL) && (Ustrcmp(prev_spamd_address_work, spamd_address_work) != 0)) {
    spam_ok = 0;
  }

  /* 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, NULL);

  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_work != '/') {
    int num_servers = 0;
    int current_server;
    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) {

      /* Potential memory leak as we never free the store. */
      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;
    };

    while ( num_servers > 0 ) {
      int i;

      /* Randomly pick a server to try */
      current_server = random_number( num_servers );

      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));

      (void)close(spamd_sock);

      /* Remove the server from the list. XXX We should free the memory */
      num_servers--;
      for( i = current_server; i < num_servers; i++ )
        spamd_address_vector[i] = spamd_address_vector[i+1];
    }

    if ( num_servers == 0 ) {
      log_write(0, LOG_MAIN|LOG_PANIC, "spam acl condition: all spamd servers failed");
      (void)fclose(mbox_file);
      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 expanded spamd_address if needed */
  if (spamd_address_work != spamd_address) {
    prev_spamd_address_work = string_copy(spamd_address_work);
  }
  /* 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
8523533c TK	1	/*************************************************
	2	* Exim - an Internet mail transport agent *
	3	*************************************************/
	4
	5	/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */
	6	/* License: GPL */
	7
	8	/* Code for calling spamassassin's spamd. Called from acl.c. */
	9
	10	#include "exim.h"
	11	#ifdef WITH_CONTENT_SCAN
	12	#include "spam.h"
	13
	14	uschar spam_score_buffer[16];
	15	uschar spam_score_int_buffer[16];
	16	uschar spam_bar_buffer[128];
	17	uschar spam_report_buffer[32600];
	18	uschar prev_user_name[128] = "";
	19	int spam_ok = 0;
	20	int spam_rc = 0;
f7274286	21	uschar *prev_spamd_address_work = NULL;
8523533c TK	22
	23	int spam(uschar **listptr) {
	24	int sep = 0;
	25	uschar list = listptr;
	26	uschar *user_name;
	27	uschar user_name_buffer[128];
f7b63901	28	unsigned long mbox_size;
8523533c TK	29	FILE *mbox_file;
	30	int spamd_sock;
	31	uschar spamd_buffer[32600];
cfe75fc3	32	int i, j, offset, result;
8523533c TK	33	uschar spamd_version[8];
	34	uschar spamd_score_char;
	35	double spamd_threshold, spamd_score;
	36	int spamd_report_offset;
	37	uschar p,q;
	38	int override = 0;
cfe75fc3 PH	39	time_t start;
cfe75fc3 PH	40	size_t read, wrote;
8523533c	41	struct sockaddr_un server;
f452e07e	42	#ifndef NO_POLL_H
cfe75fc3	43	struct pollfd pollfd;
25257489 PH	44	#else /* Patch posted by Erik ? for OS X */
	45	struct timeval select_tv; /* and applied by PH */
	46	fd_set select_fd;
f452e07e	47	#endif
b6e6e716	48	uschar *spamd_address_work;
8523533c	49
5614ee86	50	/* stop compiler warning */
91ecef39	51	result = 0;
5614ee86	52
8523533c TK	53	/* find the username from the option list */
	54	if ((user_name = string_nextinlist(&list, &sep,
	55	user_name_buffer,
	56	sizeof(user_name_buffer))) == NULL) {
	57	/* no username given, this means no scanning should be done */
	58	return FAIL;
	59	};
	60
	61	/* if username is "0" or "false", do not scan */
	62	if ( (Ustrcmp(user_name,"0") == 0) \|\|
	63	(strcmpic(user_name,US"false") == 0) ) {
	64	return FAIL;
	65	};
	66
	67	/* if there is an additional option, check if it is "true" */
	68	if (strcmpic(list,US"true") == 0) {
	69	/* in that case, always return true later */
	70	override = 1;
	71	};
	72
f7274286 PP	73	/* expand spamd_address if needed */
	74	if (*spamd_address == '$') {
	75	spamd_address_work = expand_string(spamd_address);
	76	if (spamd_address_work == NULL) {
	77	log_write(0, LOG_MAIN\|LOG_PANIC,
	78	"spamassassin acl condition: spamd_address starts with $, but expansion failed: %s", expand_string_message);
	79	return DEFER;
	80	}
	81	}
	82	else
	83	spamd_address_work = spamd_address;
	84
	85	/* check if previous spamd_address was expanded and has changed. dump cached results if so */
	86	if ( spam_ok && ( prev_spamd_address_work != NULL) && (Ustrcmp(prev_spamd_address_work, spamd_address_work) != 0)) {
	87	spam_ok = 0;
	88	}
	89
8e669ac1	90	/* if we scanned for this username last time, just return */
8523533c TK	91	if ( spam_ok && ( Ustrcmp(prev_user_name, user_name) == 0 ) ) {
	92	if (override)
	93	return OK;
	94	else
	95	return spam_rc;
	96	};
8e669ac1	97
8523533c	98	/* make sure the eml mbox file is spooled up */
8544e77a	99	mbox_file = spool_mbox(&mbox_size, NULL);
8e669ac1	100
8523533c TK	101	if (mbox_file == NULL) {
	102	/* error while spooling */
	103	log_write(0, LOG_MAIN\|LOG_PANIC,
	104	"spam acl condition: error while creating mbox spool file");
	105	return DEFER;
	106	};
	107
cfe75fc3	108	start = time(NULL);
b6e6e716	109
8523533c	110	/* socket does not start with '/' -> network socket */
b6e6e716	111	if (*spamd_address_work != '/') {
8523533c	112	int num_servers = 0;
29cfeb94	113	int current_server;
8523533c	114	uschar *address = NULL;
e1e7cfcb	115	uschar *spamd_address_list_ptr = spamd_address_work;
8523533c TK	116	uschar address_buffer[256];
	117	spamd_address_container * spamd_address_vector[32];
	118
	119	/* Check how many spamd servers we have
	120	and register their addresses */
	121	while ((address = string_nextinlist(&spamd_address_list_ptr, &sep,
	122	address_buffer,
	123	sizeof(address_buffer))) != NULL) {
8e669ac1	124
29cfeb94	125	/* Potential memory leak as we never free the store. */
8523533c TK	126	spamd_address_container *this_spamd =
8523533c TK	127	(spamd_address_container *)store_get(sizeof(spamd_address_container));
8e669ac1	128
8523533c TK	129	/* grok spamd address and port */
	130	if( sscanf(CS address, "%s %u", this_spamd->tcp_addr, &(this_spamd->tcp_port)) != 2 ) {
	131	log_write(0, LOG_MAIN,
	132	"spam acl condition: warning - invalid spamd address: '%s'", address);
	133	continue;
	134	};
8e669ac1	135
8523533c TK	136	spamd_address_vector[num_servers] = this_spamd;
	137	num_servers++;
	138	if (num_servers > 31)
	139	break;
	140	};
8e669ac1	141
8523533c TK	142	/* check if we have at least one server */
	143	if (!num_servers) {
	144	log_write(0, LOG_MAIN\|LOG_PANIC,
	145	"spam acl condition: no useable spamd server addresses in spamd_address configuration option.");
f1e894f3	146	(void)fclose(mbox_file);
8523533c TK	147	return DEFER;
	148	};
	149
29cfeb94	150	while ( num_servers > 0 ) {
2e64baa9	151	int i;
8523533c	152
29cfeb94 PP	153	/* Randomly pick a server to try */
29cfeb94 PP	154	current_server = random_number( num_servers );
8e669ac1	155
8523533c TK	156	debug_printf("trying server %s, port %u\n",
	157	spamd_address_vector[current_server]->tcp_addr,
	158	spamd_address_vector[current_server]->tcp_port);
8e669ac1	159
8523533c TK	160	/* contact a spamd */
	161	if ( (spamd_sock = ip_socket(SOCK_STREAM, AF_INET)) < 0) {
	162	log_write(0, LOG_MAIN\|LOG_PANIC,
	163	"spam acl condition: error creating IP socket for spamd");
f1e894f3	164	(void)fclose(mbox_file);
8e669ac1	165	return DEFER;
8523533c	166	};
8e669ac1	167
8523533c TK	168	if (ip_connect( spamd_sock,
	169	AF_INET,
	170	spamd_address_vector[current_server]->tcp_addr,
	171	spamd_address_vector[current_server]->tcp_port,
	172	5 ) > -1) {
	173	/* connection OK */
	174	break;
	175	};
8e669ac1	176
8523533c TK	177	log_write(0, LOG_MAIN\|LOG_PANIC,
	178	"spam acl condition: warning - spamd connection to %s, port %u failed: %s",
	179	spamd_address_vector[current_server]->tcp_addr,
	180	spamd_address_vector[current_server]->tcp_port,
	181	strerror(errno));
29cfeb94 PP	182
	183	(void)close(spamd_sock);
	184
	185	/* Remove the server from the list. XXX We should free the memory */
	186	num_servers--;
29cfeb94 PP	187	for( i = current_server; i < num_servers; i++ )
	188	spamd_address_vector[i] = spamd_address_vector[i+1];
	189	}
	190
	191	if ( num_servers == 0 ) {
	192	log_write(0, LOG_MAIN\|LOG_PANIC, "spam acl condition: all spamd servers failed");
	193	(void)fclose(mbox_file);
	194	return DEFER;
	195	}
8523533c TK	196
	197	}
	198	else {
	199	/* open the local socket */
	200
	201	if ((spamd_sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
	202	log_write(0, LOG_MAIN\|LOG_PANIC,
	203	"malware acl condition: spamd: unable to acquire socket (%s)",
	204	strerror(errno));
f1e894f3	205	(void)fclose(mbox_file);
8523533c TK	206	return DEFER;
	207	}
	208
	209	server.sun_family = AF_UNIX;
b6e6e716	210	Ustrcpy(server.sun_path, spamd_address_work);
8523533c TK	211
	212	if (connect(spamd_sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
	213	log_write(0, LOG_MAIN\|LOG_PANIC,
	214	"malware acl condition: spamd: unable to connect to UNIX socket %s (%s)",
b6e6e716	215	spamd_address_work, strerror(errno) );
f1e894f3 PH	216	(void)fclose(mbox_file);
f1e894f3 PH	217	(void)close(spamd_sock);
8523533c TK	218	return DEFER;
	219	}
	220
	221	}
	222
	223	/* now we are connected to spamd on spamd_sock */
b07e6aa3	224	(void)string_format(spamd_buffer,
8523533c	225	sizeof(spamd_buffer),
f7b63901	226	"REPORT SPAMC/1.2\r\nUser: %s\r\nContent-length: %ld\r\n\r\n",
8523533c TK	227	user_name,
	228	mbox_size);
	229
	230	/* send our request */
	231	if (send(spamd_sock, spamd_buffer, Ustrlen(spamd_buffer), 0) < 0) {
f1e894f3	232	(void)close(spamd_sock);
8523533c TK	233	log_write(0, LOG_MAIN\|LOG_PANIC,
8523533c TK	234	"spam acl condition: spamd send failed: %s", strerror(errno));
f1e894f3 PH	235	(void)fclose(mbox_file);
f1e894f3 PH	236	(void)close(spamd_sock);
8523533c TK	237	return DEFER;
	238	};
	239
	240	/* now send the file */
cfe75fc3 PH	241	/* spamd sometimes accepts conections but doesn't read data off
	242	* the connection. We make the file descriptor non-blocking so
	243	* that the write will only write sufficient data without blocking
	244	* and we poll the desciptor to make sure that we can write without
	245	* blocking. Short writes are gracefully handled and if the whole
	246	* trasaction takes too long it is aborted.
25257489 PH	247	* Note: poll() is not supported in OSX 10.2 and is reported to be
25257489 PH	248	* broken in more recent versions (up to 10.4).
cfe75fc3	249	*/
f452e07e	250	#ifndef NO_POLL_H
cfe75fc3 PH	251	pollfd.fd = spamd_sock;
cfe75fc3 PH	252	pollfd.events = POLLOUT;
f452e07e	253	#endif
ff790e47	254	(void)fcntl(spamd_sock, F_SETFL, O_NONBLOCK);
8523533c	255	do {
cfe75fc3 PH	256	read = fread(spamd_buffer,1,sizeof(spamd_buffer),mbox_file);
	257	if (read > 0) {
	258	offset = 0;
	259	again:
f452e07e	260	#ifndef NO_POLL_H
cfe75fc3	261	result = poll(&pollfd, 1, 1000);
25257489 PH	262
	263	/* Patch posted by Erik ? for OS X and applied by PH */
	264	#else
	265	select_tv.tv_sec = 1;
	266	select_tv.tv_usec = 0;
	267	FD_ZERO(&select_fd);
	268	FD_SET(spamd_sock, &select_fd);
	269	result = select(spamd_sock+1, NULL, &select_fd, NULL, &select_tv);
	270	#endif
	271	/* End Erik's patch */
	272
cfe75fc3	273	if (result == -1 && errno == EINTR)
25257489	274	goto again;
cfe75fc3 PH	275	else if (result < 1) {
	276	if (result == -1)
	277	log_write(0, LOG_MAIN\|LOG_PANIC,
	278	"spam acl condition: %s on spamd socket", strerror(errno));
	279	else {
	280	if (time(NULL) - start < SPAMD_TIMEOUT)
	281	goto again;
	282	log_write(0, LOG_MAIN\|LOG_PANIC,
	283	"spam acl condition: timed out writing spamd socket");
	284	}
f1e894f3 PH	285	(void)close(spamd_sock);
f1e894f3 PH	286	(void)fclose(mbox_file);
8523533c	287	return DEFER;
cfe75fc3	288	}
25257489	289
cfe75fc3	290	wrote = send(spamd_sock,spamd_buffer + offset,read - offset,0);
8d7d227d TK	291	if (wrote == -1)
	292	{
	293	log_write(0, LOG_MAIN\|LOG_PANIC,
	294	"spam acl condition: %s on spamd socket", strerror(errno));
f1e894f3 PH	295	(void)close(spamd_sock);
f1e894f3 PH	296	(void)fclose(mbox_file);
8d7d227d TK	297	return DEFER;
8d7d227d TK	298	}
cfe75fc3 PH	299	if (offset + wrote != read) {
	300	offset += wrote;
	301	goto again;
	302	}
	303	}
	304	}
	305	while (!feof(mbox_file) && !ferror(mbox_file));
	306	if (ferror(mbox_file)) {
	307	log_write(0, LOG_MAIN\|LOG_PANIC,
	308	"spam acl condition: error reading spool file: %s", strerror(errno));
f1e894f3 PH	309	(void)close(spamd_sock);
f1e894f3 PH	310	(void)fclose(mbox_file);
cfe75fc3	311	return DEFER;
8523533c	312	}
8523533c	313
f1e894f3	314	(void)fclose(mbox_file);
8523533c TK	315
	316	/* we're done sending, close socket for writing */
	317	shutdown(spamd_sock,SHUT_WR);
8e669ac1	318
cfe75fc3 PH	319	/* read spamd response using what's left of the timeout.
cfe75fc3 PH	320	*/
8523533c TK	321	memset(spamd_buffer, 0, sizeof(spamd_buffer));
	322	offset = 0;
	323	while((i = ip_recv(spamd_sock,
	324	spamd_buffer + offset,
	325	sizeof(spamd_buffer) - offset - 1,
cfe75fc3	326	SPAMD_TIMEOUT - time(NULL) + start)) > 0 ) {
8523533c TK	327	offset += i;
	328	}
	329
	330	/* error handling */
	331	if((i <= 0) && (errno != 0)) {
	332	log_write(0, LOG_MAIN\|LOG_PANIC,
	333	"spam acl condition: error reading from spamd socket: %s", strerror(errno));
f1e894f3	334	(void)close(spamd_sock);
8523533c TK	335	return DEFER;
	336	}
	337
	338	/* reading done */
f1e894f3	339	(void)close(spamd_sock);
8523533c TK	340
8523533c TK	341	/* dig in the spamd output and put the report in a multiline header, if requested */
0806a9c5	342	if( sscanf(CS spamd_buffer,"SPAMD/%7s 0 EX_OK\r\nContent-length: %*u\r\n\r\n%lf/%lf\r\n%n",
8523533c	343	spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3 ) {
8e669ac1	344
8523533c	345	/* try to fall back to pre-2.50 spamd output */
0806a9c5	346	if( sscanf(CS spamd_buffer,"SPAMD/%7s 0 EX_OK\r\nSpam: %*s ; %lf / %lf\r\n\r\n%n",
8523533c TK	347	spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3 ) {
	348	log_write(0, LOG_MAIN\|LOG_PANIC,
	349	"spam acl condition: cannot parse spamd output");
	350	return DEFER;
	351	};
	352	};
	353
	354	/* Create report. Since this is a multiline string,
	355	we must hack it into shape first */
	356	p = &spamd_buffer[spamd_report_offset];
	357	q = spam_report_buffer;
	358	while (*p != '\0') {
	359	/* skip \r */
	360	if (*p == '\r') {
	361	p++;
	362	continue;
	363	};
	364	q = p;
	365	q++;
	366	if (*p == '\n') {
89dec7b6 TF	367	/* add an extra space after the newline to ensure
	368	that it is treated as a header continuation line */
	369	*q = ' ';
8523533c	370	q++;
8523533c TK	371	};
	372	p++;
	373	};
	374	/* NULL-terminate */
	375	*q = '\0';
	376	q--;
	377	/* cut off trailing leftovers */
	378	while (*q <= ' ') {
	379	*q = '\0';
	380	q--;
	381	};
	382	spam_report = spam_report_buffer;
	383
	384	/* create spam bar */
	385	spamd_score_char = spamd_score > 0 ? '+' : '-';
	386	j = abs((int)(spamd_score));
	387	i = 0;
	388	if( j != 0 ) {
	389	while((i < j) && (i <= MAX_SPAM_BAR_CHARS))
	390	spam_bar_buffer[i++] = spamd_score_char;
	391	}
	392	else{
	393	spam_bar_buffer[0] = '/';
	394	i = 1;
	395	}
	396	spam_bar_buffer[i] = '\0';
	397	spam_bar = spam_bar_buffer;
	398
	399	/* create "float" spam score */
b07e6aa3	400	(void)string_format(spam_score_buffer, sizeof(spam_score_buffer),"%.1f", spamd_score);
8523533c TK	401	spam_score = spam_score_buffer;
	402
	403	/* create "int" spam score */
	404	j = (int)((spamd_score + 0.001)*10);
b07e6aa3	405	(void)string_format(spam_score_int_buffer, sizeof(spam_score_int_buffer), "%d", j);
8523533c TK	406	spam_score_int = spam_score_int_buffer;
	407
	408	/* compare threshold against score */
	409	if (spamd_score >= spamd_threshold) {
	410	/* spam as determined by user's threshold */
	411	spam_rc = OK;
	412	}
	413	else {
	414	/* not spam */
	415	spam_rc = FAIL;
	416	};
8e669ac1	417
f7274286 PP	418	/* remember expanded spamd_address if needed */
	419	if (spamd_address_work != spamd_address) {
	420	prev_spamd_address_work = string_copy(spamd_address_work);
b6e6e716	421	}
f7274286 PP	422	/* remember user name and "been here" for it */
	423	Ustrcpy(prev_user_name, user_name);
	424	spam_ok = 1;
8e669ac1	425
8523533c TK	426	if (override) {
	427	/* always return OK, no matter what the score */
	428	return OK;
	429	}
	430	else {
	431	return spam_rc;
	432	};
	433	}
	434
	435	#endif