* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */
-/* License: GPL */
+/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003 - 2015
+ * License: GPL
+ * Copyright (c) The Exim Maintainers 2016 - 2018
+ */
/* Code for calling spamassassin's spamd. Called from acl.c. */
static const uschar * loglabel = US"spam acl condition:";
+
static int
spamd_param_init(spamd_address_container *spamd)
{
-/* default spamd server weight, time and backup value */
-spamd->weight = SPAMD_WEIGHT;
+/* default spamd server weight, time and priority value */
+spamd->is_rspamd = FALSE;
spamd->is_failed = FALSE;
-spamd->is_backup = FALSE;
+spamd->weight = SPAMD_WEIGHT;
+spamd->timeout = SPAMD_TIMEOUT;
+spamd->retry = 0;
+spamd->priority = 1;
return 0;
}
static int
-spamd_param(const uschar *param, spamd_address_container *spamd)
+spamd_param(const uschar * param, spamd_address_container * spamd)
{
static int timesinceday = -1;
-uschar buffer[256];
-
-/* check backup parameter */
-if (Ustrcmp(param, "backup") == 0)
- {
- spamd->is_backup = TRUE;
- return 0; /* OK */
- }
+const uschar * s;
+const uschar * name;
/*XXX more clever parsing could discard embedded spaces? */
-/* check weight parameter */
-if (sscanf(param, "weight=%u", &spamd->weight))
+if (sscanf(CCS param, "pri=%u", &spamd->priority))
+ return 0; /* OK */
+
+if (sscanf(CCS param, "weight=%u", &spamd->weight))
{
if (spamd->weight == 0) /* this server disabled: skip it */
return 1;
return 0; /* OK */
}
-/* check time parameter */
-if (sscanf(param, "time=%s", buffer))
+if (Ustrncmp(param, "time=", 5) == 0)
{
unsigned int start_h = 0, start_m = 0, start_s = 0;
unsigned int end_h = 24, end_m = 0, end_s = 0;
unsigned int time_start, time_end;
- uschar *start_string;
- uschar *end_string;
- uschar *delimiter;
+ const uschar * end_string;
- if ((delimiter = US strchr(CS buffer, '-')))
+ name = US"time";
+ s = param+5;
+ if ((end_string = Ustrchr(s, '-')))
{
- *delimiter = '\0';
- start_string = buffer;
- end_string = delimiter + 1;
- if (sscanf(CS end_string, "%u.%u.%u", &end_h, &end_m, &end_s) == 0 ||
- sscanf(CS start_string, "%u.%u.%u", &start_h, &start_m, &start_s) == 0)
- {
- log_write(0, LOG_MAIN,
- "%s warning - invalid spamd time value: '%s'", loglabel, buffer);
- return -1; /* syntax error */
- }
+ end_string++;
+ if ( sscanf(CS end_string, "%u.%u.%u", &end_h, &end_m, &end_s) == 0
+ || sscanf(CS s, "%u.%u.%u", &start_h, &start_m, &start_s) == 0
+ )
+ goto badval;
}
else
- {
- log_write(0, LOG_MAIN,
- "%s warning - invalid spamd time value: '%s'", loglabel, buffer);
- return -1; /* syntax error */
- }
+ goto badval;
if (timesinceday < 0)
{
return 0;
}
+if (Ustrncmp(param, "tmo=", 4) == 0)
+ {
+ int sec = readconf_readtime((s = param+4), '\0', FALSE);
+ name = US"timeout";
+ if (sec < 0)
+ goto badval;
+ spamd->timeout = sec;
+ return 0;
+ }
+
+if (Ustrncmp(param, "retry=", 6) == 0)
+ {
+ int sec = readconf_readtime((s = param+6), '\0', FALSE);
+ name = US"retry";
+ if (sec < 0)
+ goto badval;
+ spamd->retry = sec;
+ return 0;
+ }
+
log_write(0, LOG_MAIN, "%s warning - invalid spamd parameter: '%s'",
loglabel, param);
return -1; /* syntax error */
+
+badval:
+ log_write(0, LOG_MAIN,
+ "%s warning - invalid spamd %s value: '%s'", loglabel, name, s);
+ return -1; /* syntax error */
}
static int
-spamd_get_server(spamd_address_container **spamds, int num_servers)
+spamd_get_server(spamd_address_container ** spamds, int num_servers)
{
unsigned int i;
-long rnd, weights = 0;
-static BOOL srandomed = 0;
-BOOL usebackup = FALSE;
+spamd_address_container * sd;
+long rnd, weights;
+unsigned pri;
+static BOOL srandomed = FALSE;
-for (;;)
- {
- /* seedup, if we have only 1 server */
- if (num_servers == 1)
- return (spamds[0]->is_failed ? -1 : 0);
+/* speedup, if we have only 1 server */
+if (num_servers == 1)
+ return (spamds[0]->is_failed ? -1 : 0);
- /* init ranmod */
- if (!srandomed)
- {
- struct timeval tv;
- gettimeofday(&tv, NULL);
- srandom((unsigned int)(tv.tv_usec/1000));
- srandomed = TRUE;
- }
-
- /* get sum of all weights */
- for (i = 0; i < num_servers; i++)
- if (!spamds[i]->is_failed && spamds[i]->is_backup == usebackup)
- weights += spamds[i]->weight;
+/* init ranmod */
+if (!srandomed)
+ {
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ srandom((unsigned int)(tv.tv_usec/1000));
+ srandomed = TRUE;
+ }
- if (weights != 0)
- break;
- if (usebackup) /* all servers failed (backups too) */
- return -1;
- usebackup = TRUE;
+/* scan for highest pri */
+for (pri = 0, i = 0; i < num_servers; i++)
+ {
+ sd = spamds[i];
+ if (!sd->is_failed && sd->priority > pri) pri = sd->priority;
}
-rnd = random() % weights;
+/* get sum of weights */
+for (weights = 0, i = 0; i < num_servers; i++)
+ {
+ sd = spamds[i];
+ if (!sd->is_failed && sd->priority == pri) weights += sd->weight;
+ }
+if (weights == 0) /* all servers failed */
+ return -1;
-for (i = 0; i < num_servers; i++)
- if (!spamds[i]->is_failed && spamds[i]->is_backup == usebackup)
- if ((rnd -= spamds[i]->weight) < 0)
+for (rnd = random() % weights, i = 0; i < num_servers; i++)
+ {
+ sd = spamds[i];
+ if (!sd->is_failed && sd->priority == pri)
+ if ((rnd -= sd->weight) <= 0)
return i;
+ }
log_write(0, LOG_MAIN|LOG_PANIC,
"%s unknown error (memory/cpu corruption?)", loglabel);
int
-spam(uschar **listptr)
+spam(const uschar **listptr)
{
int sep = 0;
-uschar *list = *listptr;
+const uschar *list = *listptr;
uschar *user_name;
uschar user_name_buffer[128];
unsigned long mbox_size;
int spamd_sock = -1;
uschar spamd_buffer[32600];
int i, j, offset, result;
-BOOL is_rspamd;
uschar spamd_version[8];
uschar spamd_short_result[8];
uschar spamd_score_char;
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 */
fd_set select_fd;
#endif
uschar *spamd_address_work;
+spamd_address_container * sd;
/* stop compiler warning */
result = 0;
else
spamd_address_work = spamd_address;
-HDEBUG(D_acl) debug_printf("spamd: addrlist '%s'\n", spamd_address_work);
+DEBUG(D_acl) debug_printf_indent("spamd: addrlist '%s'\n", spamd_address_work);
/* check if previous spamd_address was expanded and has changed. dump cached results if so */
if ( spam_ok
return override ? OK : 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 */
+if (!(mbox_file = spool_mbox(&mbox_size, NULL, NULL)))
+ { /* error while spooling */
log_write(0, LOG_MAIN|LOG_PANIC,
"%s error while creating mbox spool file", loglabel);
return DEFER;
{
int num_servers = 0;
int current_server;
- uschar *address;
- uschar *spamd_address_list_ptr = spamd_address_work;
+ uschar * address;
+ const uschar * spamd_address_list_ptr = spamd_address_work;
spamd_address_container * spamd_address_vector[32];
- spamd_address_container * this_spamd;
-
/* Check how many spamd servers we have
and register their addresses */
- while ((address = string_nextinlist(&spamd_address_list_ptr, &sep,
- NULL, 0)) != NULL)
+ sep = 0; /* default colon-sep */
+ while ((address = string_nextinlist(&spamd_address_list_ptr, &sep, NULL, 0)))
{
- uschar * sublist;
+ const uschar * sublist;
int sublist_sep = -(int)' '; /* default space-sep */
unsigned args;
uschar * s;
- HDEBUG(D_acl) debug_printf("spamd: addr entry '%s'\n", address);
- this_spamd =
- (spamd_address_container *)store_get(sizeof(spamd_address_container));
+ DEBUG(D_acl) debug_printf_indent("spamd: addr entry '%s'\n", address);
+ sd = (spamd_address_container *)store_get(sizeof(spamd_address_container));
- for (sublist = address, args = 0, spamd_param_init(this_spamd);
- s = string_nextinlist(&sublist, &sublist_sep, NULL, 0);
+ for (sublist = address, args = 0, spamd_param_init(sd);
+ (s = string_nextinlist(&sublist, &sublist_sep, NULL, 0));
args++
)
{
- HDEBUG(D_acl) debug_printf("spamd: addr parm '%s'\n", s);
+ DEBUG(D_acl) debug_printf_indent("spamd: addr parm '%s'\n", s);
switch (args)
{
- case 0: this_spamd->hostname = s;
+ case 0: sd->hostspec = s;
if (*s == '/') args++; /* local; no port */
break;
- case 1: this_spamd->tcp_port = atoi(s); break;
- default: spamd_param(s, this_spamd); break;
+ case 1: sd->hostspec = string_sprintf("%s %s", sd->hostspec, s);
+ break;
+ default: spamd_param(s, sd);
+ break;
}
}
if (args < 2)
continue;
}
- spamd_address_vector[num_servers] = this_spamd;
+ spamd_address_vector[num_servers] = sd;
if (++num_servers > 31)
break;
}
goto defer;
}
- while (1)
+ current_server = spamd_get_server(spamd_address_vector, num_servers);
+ sd = spamd_address_vector[current_server];
+ for(;;)
{
- struct hostent *he;
- int i;
- BOOL is_local;
-
- current_server = spamd_get_server(spamd_address_vector, num_servers);
- this_spamd = spamd_address_vector[current_server];
-
- is_local = *this_spamd->hostname == '/';
+ uschar * errstr;
- debug_printf(is_local
- ? "trying server %s\n" : "trying server %s, port %u\n",
- this_spamd->hostname, this_spamd->tcp_port);
+ DEBUG(D_acl) debug_printf_indent("spamd: trying server %s\n", sd->hostspec);
- /* contact a spamd */
- if (is_local)
+ for (;;)
{
- if ((spamd_sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
- {
- log_write(0, LOG_MAIN|LOG_PANIC,
- "%s spamd: unable to acquire socket (%s)",
- loglabel,
- strerror(errno));
- goto defer;
- }
-
- server.sun_family = AF_UNIX;
- Ustrcpy(server.sun_path, this_spamd->hostname);
-
- if (connect(spamd_sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) >= 0)
- break; /* connection OK */
-
- log_write(0, LOG_MAIN,
- "%s spamd: unable to connect to UNIX socket %s (%s)",
- loglabel, server.sun_path, strerror(errno) );
+ /*XXX could potentially use TFO early-data here */
+ if ( (spamd_sock = ip_streamsocket(sd->hostspec, &errstr, 5)) >= 0
+ || sd->retry <= 0
+ )
+ break;
+ DEBUG(D_acl) debug_printf_indent("spamd: server %s: retry conn\n", sd->hostspec);
+ while (sd->retry > 0) sd->retry = sleep(sd->retry);
}
- else
- {
- if ((spamd_sock = ip_socket(SOCK_STREAM, AF_INET)) < 0)
- {
- log_write(0, LOG_MAIN|LOG_PANIC,
- "%s error creating IP socket for spamd", loglabel);
- goto defer;
- }
-
- /*XXX should we use getaddrinfo? */
- if (!(he = gethostbyname(CS this_spamd->hostname)))
- log_write(0, LOG_MAIN|LOG_PANIC,
- "%s failed to lookup host '%s'", loglabel, this_spamd->hostname);
-
- else
- {
- struct in_addr in = *(struct in_addr *) he->h_addr_list[0];
+ if (spamd_sock >= 0)
+ break;
- if (ip_connect(spamd_sock, AF_INET, US inet_ntoa(in),
- this_spamd->tcp_port, 5) > -1)
- break; /* connection OK */
+ log_write(0, LOG_MAIN, "%s spamd: %s", loglabel, errstr);
+ sd->is_failed = TRUE;
- log_write(0, LOG_MAIN,
- "%s warning - spamd connection to '%s', port %u failed: %s",
- loglabel,
- this_spamd->hostname, this_spamd->tcp_port, strerror(errno));
- }
-
- (void)close(spamd_sock);
-
- this_spamd->is_failed = TRUE;
- current_server = spamd_get_server(spamd_address_vector, num_servers);
- if (current_server < 0)
- {
- log_write(0, LOG_MAIN|LOG_PANIC, "%s all spamd servers failed",
- loglabel);
- goto defer;
- }
+ current_server = spamd_get_server(spamd_address_vector, num_servers);
+ if (current_server < 0)
+ {
+ log_write(0, LOG_MAIN|LOG_PANIC, "%s all spamd servers failed", loglabel);
+ goto defer;
}
+ sd = spamd_address_vector[current_server];
}
- is_rspamd = this_spamd->is_rspamd;
- }
-
-if (spamd_sock == -1)
- {
- log_write(0, LOG_MAIN|LOG_PANIC,
- "programming fault, spamd_sock unexpectedly unset");
- goto defer;
}
(void)fcntl(spamd_sock, F_SETFL, O_NONBLOCK);
/* now we are connected to spamd on spamd_sock */
-if (is_rspamd)
- { /* rspamd variant */
- uschar *req_str;
- const char *helo;
- const char *fcrdns;
-
- req_str = string_sprintf("CHECK RSPAMC/1.3\r\nContent-length: %lu\r\n"
- "Queue-Id: %s\r\nFrom: <%s>\r\nRecipient-Number: %d\r\n", mbox_size,
- message_id, sender_address, recipients_count);
+if (sd->is_rspamd)
+ {
+ gstring * req_str;
+ const uschar * s;
+
+ req_str = string_append(NULL, 8,
+ "CHECK RSPAMC/1.3\r\nContent-length: ", string_sprintf("%lu\r\n", mbox_size),
+ "Queue-Id: ", message_id,
+ "\r\nFrom: <", sender_address,
+ ">\r\nRecipient-Number: ", string_sprintf("%d\r\n", recipients_count));
+
for (i = 0; i < recipients_count; i ++)
- req_str = string_sprintf("%sRcpt: <%s>\r\n", req_str, recipients_list[i].address);
- if ((helo = expand_string(US"$sender_helo_name")) != NULL && *helo != '\0')
- req_str = string_sprintf("%sHelo: %s\r\n", req_str, helo);
- if ((fcrdns = expand_string(US"$sender_host_name")) != NULL && *fcrdns != '\0')
- req_str = string_sprintf("%sHostname: %s\r\n", req_str, fcrdns);
- if (sender_host_address != NULL)
- req_str = string_sprintf("%sIP: %s\r\n", req_str, sender_host_address);
- req_str = string_sprintf("%s\r\n", req_str);
- wrote = send(spamd_sock, req_str, Ustrlen(req_str), 0);
+ req_str = string_append(req_str, 3,
+ "Rcpt: <", recipients_list[i].address, ">\r\n");
+ if ((s = expand_string(US"$sender_helo_name")) && *s)
+ req_str = string_append(req_str, 3, "Helo: ", s, "\r\n");
+ if ((s = expand_string(US"$sender_host_name")) && *s)
+ req_str = string_append(req_str, 3, "Hostname: ", s, "\r\n");
+ if (sender_host_address)
+ req_str = string_append(req_str, 3, "IP: ", sender_host_address, "\r\n");
+ if ((s = expand_string(US"$authenticated_id")) && *s)
+ req_str = string_append(req_str, 3, "User: ", s, "\r\n");
+ req_str = string_catn(req_str, US"\r\n", 2);
+ wrote = send(spamd_sock, req_str->s, req_str->ptr, 0);
}
- else
+else
{ /* spamassassin variant */
(void)string_format(spamd_buffer,
sizeof(spamd_buffer),
/* send our request */
wrote = send(spamd_sock, spamd_buffer, Ustrlen(spamd_buffer), 0);
}
+
if (wrote == -1)
{
(void)close(spamd_sock);
log_write(0, LOG_MAIN|LOG_PANIC,
- "%s spamd send failed: %s", loglabel, strerror(errno));
+ "%s spamd %s send failed: %s", loglabel, callout_address, strerror(errno));
goto defer;
}
/* now send the file */
-/* spamd sometimes accepts conections but doesn't read data off
+/* spamd sometimes accepts connections 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
+ * and we poll the descriptor 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.
+ * transaction 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).
*/
{
if (result == -1)
log_write(0, LOG_MAIN|LOG_PANIC,
- "%s %s on spamd socket", loglabel, strerror(errno));
+ "%s %s on spamd %s socket", loglabel, callout_address, strerror(errno));
else
{
- if (time(NULL) - start < SPAMD_TIMEOUT)
+ if (time(NULL) - start < sd->timeout)
goto again;
log_write(0, LOG_MAIN|LOG_PANIC,
- "%s timed out writing spamd socket", loglabel);
+ "%s timed out writing spamd %s, socket", loglabel, callout_address);
}
(void)close(spamd_sock);
goto defer;
if (wrote == -1)
{
log_write(0, LOG_MAIN|LOG_PANIC,
- "%s %s on spamd socket", loglabel, strerror(errno));
+ "%s %s on spamd %s socket", loglabel, callout_address, strerror(errno));
(void)close(spamd_sock);
goto defer;
}
(void)fclose(mbox_file);
/* we're done sending, close socket for writing */
-shutdown(spamd_sock,SHUT_WR);
+if (!sd->is_rspamd)
+ shutdown(spamd_sock,SHUT_WR);
/* read spamd response using what's left of the timeout. */
memset(spamd_buffer, 0, sizeof(spamd_buffer));
while ((i = ip_recv(spamd_sock,
spamd_buffer + offset,
sizeof(spamd_buffer) - offset - 1,
- SPAMD_TIMEOUT - time(NULL) + start)) > 0 )
+ sd->timeout - time(NULL) + start)) > 0)
offset += i;
+spamd_buffer[offset] = '\0'; /* guard byte */
/* error handling */
if (i <= 0 && errno != 0)
{
log_write(0, LOG_MAIN|LOG_PANIC,
- "%s error reading from spamd socket: %s", loglabel, strerror(errno));
+ "%s error reading from spamd %s, socket: %s", loglabel, callout_address, strerror(errno));
(void)close(spamd_sock);
return DEFER;
}
/* reading done */
(void)close(spamd_sock);
-if (is_rspamd)
+if (sd->is_rspamd)
{ /* rspamd variant of reply */
int r;
- if ((r = sscanf(CS spamd_buffer,
+ if ( (r = sscanf(CS spamd_buffer,
"RSPAMD/%7s 0 EX_OK\r\nMetric: default; %7s %lf / %lf / %lf\r\n%n",
spamd_version, spamd_short_result, &spamd_score, &spamd_threshold,
- &spamd_reject_score, &spamd_report_offset)) != 5)
+ &spamd_reject_score, &spamd_report_offset)) != 5
+ || spamd_report_offset >= offset /* verify within buffer */
+ )
{
- log_write(0, LOG_MAIN|LOG_PANIC,
- "%s cannot parse spamd output: %d", loglabel, r);
- return DEFER;
+ log_write(0, LOG_MAIN|LOG_PANIC,
+ "%s cannot parse spamd %s, output: %d", loglabel, callout_address, r);
+ return DEFER;
}
/* now parse action */
p = &spamd_buffer[spamd_report_offset];
spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3)
{
log_write(0, LOG_MAIN|LOG_PANIC,
- "%s cannot parse spamd output", loglabel);
+ "%s cannot parse spamd %s output", loglabel, callout_address);
return DEFER;
}
}
}
#endif
+/* vi: aw ai sw=2
+*/
git://git.exim.org / exim.git / blobdiff