From cedc6ab0e85c17c31d0548309326bb7da87a3415 Mon Sep 17 00:00:00 2001
From: mortenp <none@none>
Date: Sun, 4 Mar 2007 04:26:00 +1100
Subject: [PATCH] Added support for mail size limit (Christoph Wilke)

---
 ChangeLog           |  1 +
 TUNABLES            |  9 +++++++
 src/mlmmj-process.c | 65 ++++++++++++++++++++++++++++++++++++++++++---
 3 files changed, 71 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 7e9e1db5..e7b0a013 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,4 @@
+ o Added support for mail size limit (Christoph Wilke)
  o Log the result of access rules in the operation log (Henne Vogelsang)
  o Ignore empty lines in control files
 1.2.13
diff --git a/TUNABLES b/TUNABLES
index 352c1c98..46366bb9 100644
--- a/TUNABLES
+++ b/TUNABLES
@@ -183,3 +183,12 @@ to specify several entries (one pr. line), it's marked "list".
    If this file exists, subscription to the nomail version of the mailinglist
    will be denied. (Useful if you don't want to allow nomail and notify users
    about it).
+
+ · maxmailsize			(normal)
+
+   With this option the maximal allowed size of incoming mails can be specified.
+
+ · nomaxmailsizedenymails	(boolean)
+
+   If this is set, no reject notifications caused by violation of maxmailsize
+   will be sent.
diff --git a/src/mlmmj-process.c b/src/mlmmj-process.c
index 8ccc0b6d..42428117 100644
--- a/src/mlmmj-process.c
+++ b/src/mlmmj-process.c
@@ -330,7 +330,9 @@ int main(int argc, char **argv)
 	int i, j, opt, noprocess = 0, moderated = 0;
 	int hdrfd, footfd, rawmailfd, donemailfd;
 	int subonlypost = 0, addrtocc = 1, intocc = 0, modnonsubposts = 0;
+	int maxmailsize = 0;
 	int notoccdenymails = 0, noaccessdenymails = 0, nosubonlydenymails = 0;
+	int nomaxmailsizedenymails = 0;
 	char *listdir = NULL, *mailfile = NULL, *headerfilename = NULL;
 	char *footerfilename = NULL, *donemailname = NULL;
 	char *randomstr = NULL, *mqueuename;
@@ -338,7 +340,8 @@ int main(int argc, char **argv)
 	char *bindir, *subjectprefix, *discardname, *listaddr, *listdelim;
 	char *listfqdn, *listname, *fromaddr;
 	char *queuefilename, *recipextra = NULL, *owner = NULL;
-	char *maildata[2] = { "posteraddr", NULL };
+	char *maxmailsizestr;
+	char *maildata[4] = { "posteraddr", NULL, "maxmailsize", NULL };
 	char *envstr, *efrom;
 	struct stat st;
 	uid_t uid;
@@ -613,6 +616,63 @@ int main(int argc, char **argv)
 		return EXIT_SUCCESS;
 	}
 
+	listaddr = getlistaddr(listdir);
+	alternates = ctrlvalues(listdir, "listaddress");
+	
+	/* checking incoming mail's size */
+	maxmailsizestr = ctrlvalue(listdir, "maxmailsize");
+	if(maxmailsizestr) {
+		maxmailsize = atol(maxmailsizestr);
+		if(stat(donemailname, &st) < 0) {
+			log_error(LOG_ARGS, "stat(%s,..) failed", donemailname);
+			exit(EXIT_FAILURE);
+		}
+
+		if(st.st_size > maxmailsize) {
+
+			nomaxmailsizedenymails = statctrl(listdir, "nomaxmailsizedenymails");
+			if (nomaxmailsizedenymails) {
+				errno = 0;
+				log_error(LOG_ARGS, "Discarding %s due to"
+						" size limit (%d bytes too big)",
+						donemailname, (st.st_size - maxmailsize));
+				unlink(donemailname);
+				unlink(mailfile);
+				myfree(donemailname);
+				myfree(maxmailsizestr);
+				exit(EXIT_SUCCESS);
+			}
+
+			listdelim = getlistdelim(listdir);
+			listname = genlistname(listaddr);
+			listfqdn = genlistfqdn(listaddr);
+			fromaddr = concatstr(4, listname, listdelim,
+					"bounces-help@", listfqdn);
+			maildata[3] = maxmailsizestr;
+			queuefilename = prepstdreply(listdir,
+					"maxmailsize", "$listowner$",
+					fromemails.emaillist[0],
+					NULL, 2, maildata, NULL);
+			MY_ASSERT(queuefilename)
+			myfree(listdelim);
+			myfree(listname);
+			myfree(listfqdn);
+			unlink(donemailname);
+			unlink(mailfile);
+			myfree(donemailname);
+			myfree(maxmailsizestr);
+			execlp(mlmmjsend, mlmmjsend,
+					"-l", "1",
+					"-L", listdir,
+					"-T", fromemails.emaillist[0],
+					"-F", fromaddr,
+					"-m", queuefilename, (char *)NULL);
+		
+			log_error(LOG_ARGS, "execlp() of '%s' failed", mlmmjsend);
+			exit(EXIT_FAILURE);
+		}
+	}
+
 	/* discard malformed mail with invalid From: */
 	if(fromemails.emailcount != 1) { 
 		for(i = 0; i < fromemails.emailcount; i++)
@@ -655,9 +715,6 @@ int main(int argc, char **argv)
 
 	unlink(mailfile);
 
-	listaddr = getlistaddr(listdir);
-	alternates = ctrlvalues(listdir, "listaddress");
-
 	addrtocc = !(statctrl(listdir, "tocc"));
 	if(addrtocc) {
 		for(i = 0; i < toemails.emailcount; i++) {
-- 
2.47.3