From 2dd66a8c50f85adcd210b1d482ed1d5ef6e06142 Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Thu, 16 Jan 1997 03:29:34 +0000
Subject: One step towards proper continuation handling.

svn path=/trunk/; revision=774
---
 driver.c | 15 +++++++++++----
 socket.c | 12 ++++++++++++
 socket.h |  5 +++++
 3 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/driver.c b/driver.c
index 531b6f73..c0901c8c 100644
--- a/driver.c
+++ b/driver.c
@@ -329,7 +329,7 @@ char *realname;		/* real name of host */
     char buf [MSGBUFSIZE+1]; 
     char *bufp, *headers, *fromhdr,*tohdr,*cchdr,*bcchdr,*received_for,*envto;
     char *fromptr, *toptr;
-    int n, oldlen;
+    int n, oldlen, ch;
     int inheaders,lines,sizeticker;
     FILE *sinkfp;
     RETSIGTYPE (*sigchld)();
@@ -345,10 +345,17 @@ char *realname;		/* real name of host */
     oldlen = 0;
     while (delimited || len > 0)
     {
-	if (!SockGets(buf,sizeof(buf),sockfp))
-	    return(PS_SOCKET);
+	buf[0] = '\0';
+	do {
+	    if (!SockGets(buf+strlen(buf), sizeof(buf)-strlen(buf)-1, sockfp))
+		return(PS_SOCKET);
+	    vtalarm(ctl->server.timeout);
+	} while
+	    /* we may need to grab RFC822 continuations */
+	    (inheaders && (ch = SockPeek(sockfp)) == ' ' || ch == '\t');
+
+	/* compute length *before* squeezing out CRs */
 	n = strlen(buf);
-	vtalarm(ctl->server.timeout);
 
 	/* squeeze out all carriage returns */
 	for (fromptr = toptr = buf; *fromptr; fromptr++)
diff --git a/socket.c b/socket.c
index 734321fc..6b2076e7 100644
--- a/socket.c
+++ b/socket.c
@@ -136,6 +136,18 @@ char *SockGets(char *buf, int len, FILE *sockfp)
     return buf;
 }
 
+int SockPeek(FILE *sockfp)
+/* peek at the next socket character without actually reading it */
+{
+    int n;
+    char ch;
+
+    if ((n = recv(fileno(sockfp), &ch, 1, MSG_PEEK)) == -1)
+	return -1;
+    else
+	return(ch);
+}
+
 #ifdef MAIN
 /*
  * Use the chargen service to test input beuffering directly.
diff --git a/socket.h b/socket.h
index 6c93c634..f84f5b4d 100644
--- a/socket.h
+++ b/socket.h
@@ -18,6 +18,11 @@ returns buffer on success, NULL on failure.
 */
 char *SockGets(char *buf, int len, FILE *sockfp);
 
+/*
+ * Peek at the next socket character without actually reading it.
+ */
+int SockPeek(FILE *sockfp);
+
 /*
 Write a chunk of bytes to the socket (matches interface of fwrite).
 Returns number of bytes successfully written.
-- 
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