From 5b582fdaa0fb518a9b3c8bfe1cbd4151efad3c62 Mon Sep 17 00:00:00 2001
From: Peter Korsgaard <jacmet@sunsite.dk>
Date: Thu, 15 Mar 2007 08:36:18 +0000
Subject: tftp patch

---
 package/busybox/busybox-1.4.1-tftp.patch | 112 +++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 package/busybox/busybox-1.4.1-tftp.patch

diff --git a/package/busybox/busybox-1.4.1-tftp.patch b/package/busybox/busybox-1.4.1-tftp.patch
new file mode 100644
index 000000000..6faf5c728
--- /dev/null
+++ b/package/busybox/busybox-1.4.1-tftp.patch
@@ -0,0 +1,112 @@
+--- busybox-1.4.1/include/libbb.h	Wed Jan 24 22:34:48 2007
++++ busybox-1.4.1-tftp/include/libbb.h	Sat Mar  3 00:02:34 2007
+@@ -290,7 +290,7 @@
+ 
+ /* "new" (ipv4+ipv6) API */
+ typedef struct len_and_sockaddr {
+-	int len;
++	socklen_t len;
+ 	union {
+ 		struct sockaddr sa;
+ 		struct sockaddr_in sin;
+--- busybox-1.4.1/networking/tftp.c	Wed Jan 24 22:34:34 2007
++++ busybox-1.4.1-tftp/networking/tftp.c	Sat Mar  3 00:02:56 2007
+@@ -132,7 +132,7 @@
+ #if ENABLE_FEATURE_TFTP_GET && ENABLE_FEATURE_TFTP_PUT
+ 		const int cmd,
+ #endif
+-		const len_and_sockaddr *peer_lsa,
++		len_and_sockaddr *peer_lsa,
+ 		const char *remotefile, const int localfd,
+ 		unsigned port, int tftp_bufsize)
+ {
+@@ -149,6 +149,9 @@
+ 
+ 	USE_FEATURE_TFTP_BLOCKSIZE(int want_option_ack = 0;)
+ 
++	unsigned org_port;
++	len_and_sockaddr *const from = alloca(offsetof(len_and_sockaddr, sa) + peer_lsa->len);
++
+ 	/* Can't use RESERVE_CONFIG_BUFFER here since the allocation
+ 	 * size varies meaning BUFFERS_GO_ON_STACK would fail */
+ 	/* We must keep the transmit and receive buffers seperate */
+@@ -156,7 +159,7 @@
+ 	char *xbuf = xmalloc(tftp_bufsize += 4);
+ 	char *rbuf = xmalloc(tftp_bufsize);
+ 
+-	port = htons(port);
++	port = org_port = htons(port);
+ 
+ 	socketfd = xsocket(peer_lsa->sa.sa_family, SOCK_DGRAM, 0);
+ 
+@@ -167,10 +170,10 @@
+ 	}
+ 
+ 	while (1) {
+-
+ 		cp = xbuf;
+ 
+ 		/* first create the opcode part */
++		/* (this 16bit store is aligned) */
+ 		*((uint16_t*)cp) = htons(opcode);
+ 		cp += 2;
+ 
+@@ -222,6 +225,7 @@
+ 		/* add ack and data */
+ 
+ 		if (CMD_GET(cmd) ? (opcode == TFTP_ACK) : (opcode == TFTP_DATA)) {
++			/* TODO: unaligned access! */
+ 			*((uint16_t*)cp) = htons(block_nr);
+ 			cp += 2;
+ 			block_nr++;
+@@ -273,28 +277,26 @@
+ 			FD_SET(socketfd, &rfds);
+ 
+ 			switch (select(socketfd + 1, &rfds, NULL, NULL, &tv)) {
+-				struct sockaddr *from;
+-				socklen_t fromlen;
+-
++				unsigned from_port;
+ 			case 1:
+-				fromlen = peer_lsa->len;
+-				from = alloca(fromlen);
+-				memset(from, 0, fromlen);
+-
++				from->len = peer_lsa->len;
++				memset(&from->sa, 0, peer_lsa->len);
+ 				len = recvfrom(socketfd, rbuf, tftp_bufsize, 0,
+-							from, &fromlen);
++							&from->sa, &from->len);
+ 				if (len < 0) {
+ 					bb_perror_msg("recvfrom");
+ 					break;
+ 				}
+-#if ENABLE_FEATURE_IPV6
+-				if (from->sa_family == AF_INET6)
+-					if (((struct sockaddr_in6*)from)->sin6_port != port)
+-						goto recv_again;
+-#endif
+-				if (from->sa_family == AF_INET)
+-					if (((struct sockaddr_in*)from)->sin_port != port)
+-						goto recv_again;
++				from_port = get_nport(from);
++				if (port == org_port) {
++					/* Our first query went to port 69
++					 * but reply will come from different one.
++					 * Remember and use this new port */
++					port = from_port;
++					set_nport(peer_lsa, from_port);
++				}
++				if (port != from_port)
++					goto recv_again;
+ 				timeout = 0;
+ 				break;
+ 			case 0:
+@@ -317,6 +319,7 @@
+ 		}
+ 
+ 		/* process received packet */
++		/* (both accesses seems to be aligned) */
+ 
+ 		opcode = ntohs( ((uint16_t*)rbuf)[0] );
+ 		tmp = ntohs( ((uint16_t*)rbuf)[1] );
-- 
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