commit 5debcee5a74550c28da735bb1cfc5b4c8f2614a9
author Nikias Bassen <nikias@gmx.li> Tue Oct 04 14:36:57 2022 +0200
committer Nikias Bassen <nikias@gmx.li> Tue Oct 04 14:36:57 2022 +0200
tree 7afdb56a63bb962e90945b2ecb22d44f46140b4e
parent ef7cf8eb545d9ed3fb1f351376dec71608d0127b

mobilebackup: Fix version check to allow operability with really old iOS versions

src/mobilebackup.c

diff --git a/src/mobilebackup.c b/src/mobilebackup.c
index aa29277..1505623 100644
--- a/src/mobilebackup.c
+++ b/src/mobilebackup.c
@@ -279,7 +279,15 @@
 		char *str = NULL;
 		plist_get_string_val(node, &str);
 		if (str) {
-			if (strcmp(str, proto_version) != 0) {
+			int maj = 0;
+			int min = 0;
+			sscanf(str, "%u.%u", &maj, &min);
+			uint32_t this_ver = ((maj & 0xFF) << 8) | (min & 0xFF);
+			maj = 0;
+			min = 0;
+			sscanf(proto_version, "%u.%u", &maj, &min);
+			uint32_t proto_ver = ((maj & 0xFF) << 8) | (min & 0xFF);
+			if (this_ver > proto_ver) {
 				err = MOBILEBACKUP_E_BAD_VERSION;
 			}
 			free(str);
@@ -346,7 +354,15 @@
 		char *str = NULL;
 		plist_get_string_val(node, &str);
 		if (str) {
-			if (strcmp(str, proto_version) != 0) {
+			int maj = 0;
+			int min = 0;
+			sscanf(str, "%u.%u", &maj, &min);
+			uint32_t this_ver = ((maj & 0xFF) << 8) | (min & 0xFF);
+			maj = 0;
+			min = 0;
+			sscanf(proto_version, "%u.%u", &maj, &min);
+			uint32_t proto_ver = ((maj & 0xFF) << 8) | (min & 0xFF);
+			if (this_ver > proto_ver) {
 				err = MOBILEBACKUP_E_BAD_VERSION;
 			}
 			free(str);