base/SOURCES/0007-URL-encoded-Targetnames.patch

From e061cba1b91650ab08ae8fa50e8cadb13ac3d97d Mon Sep 17 00:00:00 2001
From: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Date: Sun, 16 Jun 2013 11:35:14 -0700
Subject: [RHEL7 libiscsi PATCH 07/18] URL encoded Targetnames

Assume target names are URL encoded with '%' as the special character.

Any sequence of '%' followed by two bytes in the target name will be replaced
with the byte that the second two bytes represent in hexadecimal.

Example
iqn.ronnie.test%3A1234
will be translated to iqn.ronnie.test:1234

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry-picked from upstream commit e061cba1b91650ab08ae8fa50e8cadb13ac3d97d)

[The right thing to do here is probably to not use this simple-minded code
 and use QEMU's URI parser.  I need to find a testcase, then I will create
 a bug. - Paolo]
---
 include/iscsi.h |  12 ++++--
 lib/init.c      | 114 +++++++++++++++++++++++++++++++++++++++-----------------
 lib/login.c     |   1 +
 3 files changed, 88 insertions(+), 39 deletions(-)

diff --git a/include/iscsi.h b/include/iscsi.h
index f14d404..a4ed932 100644
--- a/include/iscsi.h
+++ b/include/iscsi.h
@@ -125,6 +125,10 @@ iscsi_set_initial_r2t(struct iscsi_context *iscsi, enum iscsi_initial_r2t initia
  * iSCSI URL format :
  * iscsi://[<username>[%<password>]@]<host>[:<port>]/<target-iqn>/<lun>
  *
+ * Target names are url encoded with '%' as a special character.
+ * Example:
+ * "iqn.ronnie.test%3A1234" will be translated to "iqn.ronnie.test:1234"
+ *
  * Function will return a pointer to an iscsi url structure if successful,
  * or it will return NULL and set iscsi_get_error() accrodingly if there was a problem
  * with the URL.
diff --git a/lib/init.c b/lib/init.c
index 18f3fb2..60a1b6d 100644
--- a/lib/init.c
+++ b/lib/init.c
@@ -358,6 +358,45 @@ iscsi_is_logged_in(struct iscsi_context *iscsi)
 	return iscsi->is_loggedin;
 }
 
+static int
+h2i(int h)
+{
+	if (h >= 'a' && h <= 'f') {
+		return h - 'a' + 10;
+	}
+	if (h >= 'A' && h <= 'F') {
+		return h - 'A' + 10;
+	}
+	return h - '0';
+}
+
+static void
+iscsi_decode_url_string(char *str)
+{
+	while (*str) {
+		char *tmp = str;
+		char c;
+
+		if (*str++ != '%') {
+			continue;
+		}
+
+		if (*str == 0) {
+			return;
+		}
+		c = h2i(*str++) << 4;
+
+		if (*str == 0) {
+			return;
+		}
+		c |= h2i(*str++);
+
+		*tmp++ = c;
+		memmove(tmp, str, strlen(str));
+		tmp[strlen(str)] = 0;
+	}
+}
+
 struct iscsi_url *
 iscsi_parse_url(struct iscsi_context *iscsi, const char *url, int full)
 {
@@ -373,15 +412,18 @@ iscsi_parse_url(struct iscsi_context *iscsi, const char *url, int full)
 
 	if (strncmp(url, "iscsi://", 8)) {
 		if (full) {
-		iscsi_set_error(iscsi, "Invalid URL %s\niSCSI URL must be of "
-				"the form: %s",url,ISCSI_URL_SYNTAX); }
-		else {
-		iscsi_set_error(iscsi, "Invalid URL %s\niSCSI Portal URL must be of "
-				"the form: %s",url,ISCSI_PORTAL_URL_SYNTAX); }
+			iscsi_set_error(iscsi, "Invalid URL %s\niSCSI URL must "
+				"be of the form: %s",
+				url, ISCSI_URL_SYNTAX);
+		} else {
+			iscsi_set_error(iscsi, "Invalid URL %s\niSCSI Portal "
+				"URL must be of the form: %s",
+				url, ISCSI_PORTAL_URL_SYNTAX);
+		}
 		return NULL;
 	}
 
-	strncpy(str,url + 8,MAX_STRING_SIZE);
+	strncpy(str,url + 8, MAX_STRING_SIZE);
 	portal = str;
 
 	user   = getenv("LIBISCSI_CHAP_USERNAME");
@@ -406,56 +448,56 @@ iscsi_parse_url(struct iscsi_context *iscsi, const char *url, int full)
 	if (full) {
 		target = strchr(portal, '/');
 		if (target == NULL) {
-			iscsi_set_error(iscsi, "Invalid URL %s\nCould not parse "
-				"'<target-iqn>'\niSCSI URL must be of the "
-				"form: %s",
-				url,
-				ISCSI_URL_SYNTAX);
+			iscsi_set_error(iscsi, "Invalid URL %s\nCould not "
+				"parse '<target-iqn>'\niSCSI URL must be of "
+				"the form: %s",
+				url, ISCSI_URL_SYNTAX);
 			return NULL;
 		}
 		*target++ = 0;
 
 		if (*target == 0) {
-			iscsi_set_error(iscsi, "Invalid URL %s\nCould not parse "
-				"<target-iqn>\n"
-				"iSCSI URL must be of the form: %s",
-				url,
-				ISCSI_URL_SYNTAX);
+			iscsi_set_error(iscsi, "Invalid URL %s\nCould not "
+				"parse <target-iqn>\niSCSI URL must be of the "
+				"form: %s",
+				url, ISCSI_URL_SYNTAX);
 			return NULL;
 		}
 
 		lun = strchr(target, '/');
 		if (lun == NULL) {
-			iscsi_set_error(iscsi, "Invalid URL %s\nCould not parse <lun>\n"
-				"iSCSI URL must be of the form: %s",
-				url,
-				ISCSI_URL_SYNTAX);
+			iscsi_set_error(iscsi, "Invalid URL %s\nCould not "
+				"parse <lun>\niSCSI URL must be of the form: "
+				"%s",
+				url, ISCSI_URL_SYNTAX);
 			return NULL;
 		}
 		*lun++ = 0;
 
 		l = strtol(lun, &tmp, 10);
 		if (*lun == 0 || *tmp != 0) {
-			iscsi_set_error(iscsi, "Invalid URL %s\nCould not parse <lun>\n"
-				"iSCSI URL must be of the form: %s",
-				url,
-				ISCSI_URL_SYNTAX);
+			iscsi_set_error(iscsi, "Invalid URL %s\nCould not "
+				"parse <lun>\niSCSI URL must be of the form: "
+				"%s",
+				url, ISCSI_URL_SYNTAX);
 			return NULL;
 		}
-	}
-	else
-	{
+	} else {
 		tmp=strchr(portal,'/');
-		if (tmp) *tmp=0;
+		if (tmp) {
+			*tmp=0;
+		}
 	}
 	
-	if (iscsi != NULL)
+	if (iscsi != NULL) {
 		iscsi_url = iscsi_malloc(iscsi, sizeof(struct iscsi_url));
-	else
+	} else {
 		iscsi_url = malloc(sizeof(struct iscsi_url));
-	
+	}
+
 	if (iscsi_url == NULL) {
-		iscsi_set_error(iscsi, "Out-of-memory: Failed to allocate iscsi_url structure");
+		iscsi_set_error(iscsi, "Out-of-memory: Failed to allocate "
+			"iscsi_url structure");
 		return NULL;
 	}
 	memset(iscsi_url, 0, sizeof(struct iscsi_url));
@@ -464,15 +506,17 @@ iscsi_parse_url(struct iscsi_context *iscsi, const char *url, int full)
 	strncpy(iscsi_url->portal,portal,MAX_STRING_SIZE);
 
 	if (user != NULL && passwd != NULL) {
-		strncpy(iscsi_url->user,user,MAX_STRING_SIZE);
-		strncpy(iscsi_url->passwd,passwd,MAX_STRING_SIZE);
+		strncpy(iscsi_url->user, user, MAX_STRING_SIZE);
+		strncpy(iscsi_url->passwd, passwd, MAX_STRING_SIZE);
 	}
 
 	if (full) {
-		strncpy(iscsi_url->target,target,MAX_STRING_SIZE);
+		strncpy(iscsi_url->target, target, MAX_STRING_SIZE);
 		iscsi_url->lun = l;
 	}
 
+	iscsi_decode_url_string(&iscsi_url->target[0]);
+
 	return iscsi_url;
 }
 
diff --git a/lib/login.c b/lib/login.c
index 29fe4b3..0448ce2 100644
--- a/lib/login.c
+++ b/lib/login.c
@@ -622,6 +622,7 @@ h2i(int h)
 	}
 	return h - '0';
 }
+
 static int
 i2h(int i)
 {
-- 
1.8.1.4