rspamd/contrib/exim/patch-exim-src_spam.c.diff

diff -ru exim-4.70.orig/src/expand.c exim-4.70/src/expand.c
--- exim-4.70.orig/src/expand.c	2016-04-09 13:42:00.227625074 +0200
+++ exim-4.70/src/expand.c	2016-04-09 13:42:37.183633096 +0200
@@ -578,6 +578,7 @@
   { "sn8",                 vtype_filter_int,  &filter_sn[8] },
   { "sn9",                 vtype_filter_int,  &filter_sn[9] },
 #ifdef WITH_CONTENT_SCAN
+  { "spam_action",         vtype_stringptr,   &spam_action },
   { "spam_bar",            vtype_stringptr,   &spam_bar },
   { "spam_report",         vtype_stringptr,   &spam_report },
   { "spam_score",          vtype_stringptr,   &spam_score },
diff -ru exim-4.70.orig/src/globals.c exim-4.70/src/globals.c
--- exim-4.70.orig/src/globals.c	2016-04-09 13:42:00.219625073 +0200
+++ exim-4.70/src/globals.c	2016-04-09 13:42:37.187633096 +0200
@@ -1136,6 +1136,7 @@
 uschar *spamd_address          = US"127.0.0.1 783";
 uschar *spam_bar               = NULL;
 uschar *spam_report            = NULL;
+uschar *spam_action            = NULL;
 uschar *spam_score             = NULL;
 uschar *spam_score_int         = NULL;
 #endif
diff -ru exim-4.70.orig/src/globals.h exim-4.70/src/globals.h
--- exim-4.70.orig/src/globals.h	2016-04-09 13:42:00.219625073 +0200
+++ exim-4.70/src/globals.h	2016-04-09 13:42:37.187633096 +0200
@@ -703,6 +703,7 @@
 extern uschar *spamd_address;          /* address for the spamassassin daemon */
 extern uschar *spam_bar;               /* the spam "bar" (textual representation of spam_score) */
 extern uschar *spam_report;            /* the spamd report (multiline) */
+extern uschar *spam_action;            /* the spamd action */
 extern uschar *spam_score;             /* the spam score (float) */
 extern uschar *spam_score_int;         /* spam_score * 10 (int) */
 #endif
diff -ru exim-4.70.orig/src/spam.c exim-4.70/src/spam.c
--- exim-4.70.orig/src/spam.c	2016-04-09 13:42:00.231625075 +0200
+++ exim-4.70/src/spam.c	2016-04-09 13:43:43.927647677 +0200
@@ -16,6 +16,7 @@
 uschar spam_score_buffer[16];
 uschar spam_score_int_buffer[16];
 uschar spam_bar_buffer[128];
+uschar spam_action_buffer[32];
 uschar spam_report_buffer[32600];
 uschar prev_user_name[128] = "";
 int spam_ok = 0;
@@ -31,9 +32,11 @@
   int spamd_sock;
   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;
-  double spamd_threshold, spamd_score;
+  double spamd_threshold, spamd_score, spamd_reject_score;
   int spamd_report_offset;
   uschar *p,*q;
   int override = 0;
@@ -122,8 +125,15 @@
       spamd_address_container *this_spamd =
         (spamd_address_container *)store_get(sizeof(spamd_address_container));
 
+      /* Check for spamd variant */
+      if( Ustrstr(address, "variant=rspamd") != NULL ) {
+        this_spamd->is_rspamd = TRUE;
+      }
+      else {
+        this_spamd->is_rspamd = FALSE;
+      }
       /* grok spamd address and port */
-      if( sscanf(CS address, "%s %u", this_spamd->tcp_addr, &(this_spamd->tcp_port)) != 2 ) {
+      if( sscanf(CS address, "%23s %hu", this_spamd->tcp_addr, &(this_spamd->tcp_port)) != 2 ) {
         log_write(0, LOG_MAIN,
           "spam acl condition: warning - invalid spamd address: '%s'", address);
         continue;
@@ -165,6 +175,7 @@
                       spamd_address_vector[current_server]->tcp_port,
                       5 ) > -1) {
         /* connection OK */
+        is_rspamd = spamd_address_vector[current_server]->is_rspamd;
         break;
       };
 
@@ -197,12 +208,28 @@
     }
 
     server.sun_family = AF_UNIX;
-    Ustrcpy(server.sun_path, spamd_address_work);
+    p = Ustrstr(spamd_address_work, "variant=rspamd");
+    if( p != NULL ) {
+      is_rspamd = TRUE;
+      /* strip spaces */
+      p --;
+      while (p > spamd_address_work && isspace (*p)) {
+        p --;
+      }
+      Ustrncpy(server.sun_path, spamd_address_work, p - spamd_address_work + 1);
+      /* zero terminate */
+      server.sun_path[p - spamd_address_work + 1] = 0;
+    }
+    else {
+      is_rspamd = FALSE;  
+      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) );
+                server.sun_path, strerror(errno) );
       (void)fclose(mbox_file);
       (void)close(spamd_sock);
       return DEFER;
@@ -210,22 +237,50 @@
 
   }
 
+  (void)fcntl(spamd_sock, F_SETFL, O_NONBLOCK);
   /* 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) {
+  if (is_rspamd) { 
+    /* rspamd variant */
+    const char *helo;
+    const char *fcrdns;
+    const char *authid;
+    uschar *req_str;
+    
+    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);
+    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);
+    if ((authid = expand_string(US"$authenticated_id")) != NULL && *authid != '\0')
+      req_str = string_sprintf("%sUser: %s\r\n", req_str, authid);
+    req_str = string_sprintf("%s\r\n", req_str);
+    wrote = send(spamd_sock, req_str, Ustrlen(req_str), 0); 
+  }
+  else {
+    /* spamassassin variant */
+    (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 */
+    wrote = send(spamd_sock, spamd_buffer, Ustrlen(spamd_buffer), 0);
+  }
+  if(wrote == -1)
+  {
     (void)close(spamd_sock);
     log_write(0, LOG_MAIN|LOG_PANIC,
-         "spam acl condition: spamd send failed: %s", strerror(errno));
+      "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 connections but doesn't read data off
@@ -304,7 +359,9 @@
   (void)fclose(mbox_file);
 
   /* we're done sending, close socket for writing */
-  shutdown(spamd_sock,SHUT_WR);
+  if (!is_rspamd) {
+    shutdown(spamd_sock,SHUT_WR);
+  }
 
   /* read spamd response using what's left of the timeout.
    */
@@ -328,60 +385,93 @@
   /* 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 ) {
+  if (!is_rspamd) {
+    /* 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;
+        };
+    };
+
+    if( spamd_score >= spamd_threshold ) {
+      Ustrcpy(spam_action_buffer, "reject");
+    }
+    else {
+      Ustrcpy(spam_action_buffer, "no action");
+    }
+  }
+  else {
+    /* rspamd variant of reply */
+    int r;
+    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 ) {
       log_write(0, LOG_MAIN|LOG_PANIC,
-         "spam acl condition: cannot parse spamd output");
+            "spam acl condition: cannot parse spamd output: %d", r);
       return DEFER;
     };
-  };
+    /* now parse action */
+    p = &spamd_buffer[spamd_report_offset];
+
+    if( Ustrncmp(p, "Action: ", sizeof("Action: ") - 1) == 0 ) {
+      p += sizeof("Action: ") - 1;
+      q = &spam_action_buffer[0];
+      while (*p && *p != '\r' && (q - spam_action_buffer) < sizeof(spam_action_buffer) - 1) {
+        *q++ = *p++;
+      }
+      *q = '\0';
+    }
+  }
 
   /* 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++;
+	  /* 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--;
+	  *q = '\0';
+	  q--;
   };
+
+  /* common spamd actions */
   spam_report = spam_report_buffer;
+  spam_action = spam_action_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;
+      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[0] = '/';
+      i = 1;
   }
   spam_bar_buffer[i] = '\0';
   spam_bar = spam_bar_buffer;
@@ -397,12 +487,12 @@
 
   /* compare threshold against score */
   if (spamd_score >= spamd_threshold) {
-    /* spam as determined by user's threshold */
-    spam_rc = OK;
+      /* spam as determined by user's threshold */
+      spam_rc = OK;
   }
   else {
-    /* not spam */
-    spam_rc = FAIL;
+      /* not spam */
+      spam_rc = FAIL;
   };
 
   /* remember user name and "been here" for it unless spamd_socket was expanded */
diff -ru exim-4.70.orig/src/spam.h exim-4.70/src/spam.h
--- exim-4.70.orig/src/spam.h	2016-04-09 13:42:00.235625076 +0200
+++ exim-4.70/src/spam.h	2016-04-09 13:42:37.187633096 +0200
@@ -24,7 +24,8 @@
 
 typedef struct spamd_address_container {
   uschar tcp_addr[24];
-  unsigned int tcp_port;
+  unsigned short int tcp_port;
+  int is_rspamd:1;
 } spamd_address_container;
 
 #endif