From 557686d7b68938522f63e82bdfb27b46096ea130 Mon Sep 17 00:00:00 2001
From: MilhouseVH <milhouseVH.github@nmacleod.com>
Date: Thu, 22 Jun 2017 04:56:54 +0100
Subject: [PATCH] busybox: fix wget with brain-damaged http servers

---
 ...4_fix_for_brain_damaged_http_servers.patch | 80 +++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 packages/sysutils/busybox/patches/busybox-04_fix_for_brain_damaged_http_servers.patch

diff --git a/packages/sysutils/busybox/patches/busybox-04_fix_for_brain_damaged_http_servers.patch b/packages/sysutils/busybox/patches/busybox-04_fix_for_brain_damaged_http_servers.patch
new file mode 100644
index 0000000000..6938421c71
--- /dev/null
+++ b/packages/sysutils/busybox/patches/busybox-04_fix_for_brain_damaged_http_servers.patch
@@ -0,0 +1,80 @@
+From a6f8651911716d1d1624712eb19e4f3608767c7e Mon Sep 17 00:00:00 2001
+From: Denys Vlasenko <vda.linux@googlemail.com>
+Date: Wed, 11 Jan 2017 20:16:45 +0100
+Subject: [PATCH] wget: fix for brain-damaged HTTP servers. Closes 9471
+
+write(3, "GET / HTTP/1.1\r\nUser-Agent: Wget\r\nConnection: close\r\n\r\n", 74) = 74
+shutdown(3, SHUT_WR)    = 0
+alarm(900)              = 900
+read(3, "", 1024)       = 0
+write(2, "wget: error getting response\n", 29) = 29
+exit(1)
+
+The peer simply does not return anything. It closes its connection.
+
+Probably it detects wget closing its writing end: shutdown(3, SHUT_WR).
+
+The point it, closing write side of the socket is _valid_ for HTTP.
+wget sent the full request, it won't be sending anything more:
+it will only receive the response, and that's it.
+
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
+---
+ networking/wget.c | 23 +++++++++++++++--------
+ 1 file changed, 15 insertions(+), 8 deletions(-)
+
+diff --git a/networking/wget.c b/networking/wget.c
+index c82086878..d5a92a950 100644
+--- a/networking/wget.c
++++ b/networking/wget.c
+@@ -137,6 +137,8 @@
+ #endif
+ 
+ 
++#define SSL_SUPPORTED (ENABLE_FEATURE_WGET_OPENSSL || ENABLE_FEATURE_WGET_SSL_HELPER)
++
+ struct host_info {
+ 	char *allocated;
+ 	const char *path;
+@@ -147,7 +149,7 @@ struct host_info {
+ };
+ static const char P_FTP[] ALIGN1 = "ftp";
+ static const char P_HTTP[] ALIGN1 = "http";
+-#if ENABLE_FEATURE_WGET_OPENSSL || ENABLE_FEATURE_WGET_SSL_HELPER
++#if SSL_SUPPORTED
+ static const char P_HTTPS[] ALIGN1 = "https";
+ #endif
+ 
+@@ -448,7 +450,7 @@ static void parse_url(const char *src_url, struct host_info *h)
+ 		if (strcmp(url, P_FTP) == 0) {
+ 			h->port = bb_lookup_port(P_FTP, "tcp", 21);
+ 		} else
+-#if ENABLE_FEATURE_WGET_OPENSSL || ENABLE_FEATURE_WGET_SSL_HELPER
++#if SSL_SUPPORTED
+ 		if (strcmp(url, P_HTTPS) == 0) {
+ 			h->port = bb_lookup_port(P_HTTPS, "tcp", 443);
+ 			h->protocol = P_HTTPS;
+@@ -1089,12 +1091,17 @@ static void download_one_url(const char *url)
+ 		}
+ 
+ 		fflush(sfp);
+-		/* If we use SSL helper, keeping our end of the socket open for writing
+-		 * makes our end (i.e. the same fd!) readable (EAGAIN instead of EOF)
+-		 * even after child closes its copy of the fd.
+-		 * This helps:
+-		 */
+-		shutdown(fileno(sfp), SHUT_WR);
++
++#if SSL_SUPPORTED
++		if (target.protocol == P_HTTPS) {
++			/* If we use SSL helper, keeping our end of the socket open for writing
++			 * makes our end (i.e. the same fd!) readable (EAGAIN instead of EOF)
++			 * even after child closes its copy of the fd.
++			 * This helps:
++			 */
++			shutdown(fileno(sfp), SHUT_WR);
++		}
++#endif
+ 
+ 		/*
+ 		 * Retrieve HTTP response line and check for "200" status code.