From 5b01206f1bb2e62c08bda34b45904ec4f83ac5de Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Tue, 10 Jun 2008 08:33:24 +0200
Subject: [PATCH] socket_wrapper: truncate packets to a 1500 byte payload

Truncate sendto(), recvfrom(), send() and recv() to 1500 bytes
so that're getting a correctly formatted pcap file and the result
look more like real network traffic.

metze
---
 source/lib/socket_wrapper/socket_wrapper.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/source/lib/socket_wrapper/socket_wrapper.c b/source/lib/socket_wrapper/socket_wrapper.c
index 86d9f7a312d..981df523cdd 100644
--- a/source/lib/socket_wrapper/socket_wrapper.c
+++ b/source/lib/socket_wrapper/socket_wrapper.c
@@ -1643,6 +1643,8 @@ _PUBLIC_ ssize_t swrap_recvfrom(int s, void *buf, size_t len, int flags, struct
 		return real_recvfrom(s, buf, len, flags, from, fromlen);
 	}
 
+	len = MIN(len, 1500);
+
 	/* irix 6.4 forgets to null terminate the sun_path string :-( */
 	memset(&un_addr, 0, sizeof(un_addr));
 	ret = real_recvfrom(s, buf, len, flags, (struct sockaddr *)&un_addr, &un_addrlen);
@@ -1671,6 +1673,8 @@ _PUBLIC_ ssize_t swrap_sendto(int s, const void *buf, size_t len, int flags, con
 		return real_sendto(s, buf, len, flags, to, tolen);
 	}
 
+	len = MIN(len, 1500);
+
 	switch (si->type) {
 	case SOCK_STREAM:
 		ret = real_send(s, buf, len, flags);
@@ -1764,6 +1768,8 @@ _PUBLIC_ ssize_t swrap_recv(int s, void *buf, size_t len, int flags)
 		return real_recv(s, buf, len, flags);
 	}
 
+	len = MIN(len, 1500);
+
 	ret = real_recv(s, buf, len, flags);
 	if (ret == -1 && errno != EAGAIN && errno != ENOBUFS) {
 		swrap_dump_packet(si, NULL, SWRAP_RECV_RST, NULL, 0);
@@ -1786,6 +1792,8 @@ _PUBLIC_ ssize_t swrap_send(int s, const void *buf, size_t len, int flags)
 		return real_send(s, buf, len, flags);
 	}
 
+	len = MIN(len, 1500);
+
 	ret = real_send(s, buf, len, flags);
 
 	if (ret == -1) {
-- 
2.34.1