generic: platform/mikrotik: support LZOR encoding
Some newer MikroTik RouterBOARD devices use a new encoding scheme for their WLAN calibration data. This patch provides support for decoding this new scheme. Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
This commit is contained in:
		 Thibaut VARÈNE
					Thibaut VARÈNE
				
			
				
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						 Koen Vandeputte
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			| @@ -36,7 +36,7 @@ | |||||||
|  |  | ||||||
| #include "routerboot.h" | #include "routerboot.h" | ||||||
|  |  | ||||||
| #define RB_HARDCONFIG_VER		"0.01" | #define RB_HARDCONFIG_VER		"0.02" | ||||||
| #define RB_HC_PR_PFX			"[rb_hardconfig] " | #define RB_HC_PR_PFX			"[rb_hardconfig] " | ||||||
|  |  | ||||||
| /* ID values for hardware settings */ | /* ID values for hardware settings */ | ||||||
| @@ -75,6 +75,190 @@ static struct kobject *hc_kobj; | |||||||
| static u8 *hc_buf;		// ro buffer after init(): no locking required | static u8 *hc_buf;		// ro buffer after init(): no locking required | ||||||
| static size_t hc_buflen; | static size_t hc_buflen; | ||||||
|  |  | ||||||
|  | /* | ||||||
|  |  * For LZOR style WLAN data unpacking. | ||||||
|  |  * This binary blob is prepended to the data encoded on some devices as | ||||||
|  |  * RB_ID_WLAN_DATA, the result is then first decompressed with LZO, and then | ||||||
|  |  * finally RLE-decoded. | ||||||
|  |  * This binary blob has been extracted from RouterOS by | ||||||
|  |  * https://forum.openwrt.org/u/ius | ||||||
|  |  */ | ||||||
|  | static const u8 hc_lzor_prefix[] = { | ||||||
|  | 	0x00, 0x05, 0x4c, 0x4c, 0x44, 0x00, 0x34, 0xfe, | ||||||
|  | 	0xfe, 0x34, 0x11, 0x3c, 0x1e, 0x3c, 0x2e, 0x3c, | ||||||
|  | 	0x4c, 0x34, 0x00, 0x52, 0x62, 0x92, 0xa2, 0xb2, | ||||||
|  | 	0xc3, 0x2a, 0x14, 0x00, 0x00, 0x05, 0xfe, 0x6a, | ||||||
|  | 	0x3c, 0x16, 0x32, 0x16, 0x11, 0x1e, 0x12, 0x46, | ||||||
|  | 	0x32, 0x46, 0x11, 0x4e, 0x12, 0x36, 0x32, 0x36, | ||||||
|  | 	0x11, 0x3e, 0x12, 0x5a, 0x9a, 0x64, 0x00, 0x04, | ||||||
|  | 	0xfe, 0x10, 0x3c, 0x00, 0x01, 0x00, 0x00, 0x28, | ||||||
|  | 	0x0c, 0x00, 0x0f, 0xfe, 0x14, 0x00, 0x24, 0x24, | ||||||
|  | 	0x23, 0x24, 0x24, 0x23, 0x25, 0x22, 0x21, 0x21, | ||||||
|  | 	0x23, 0x22, 0x21, 0x22, 0x21, 0x2d, 0x38, 0x00, | ||||||
|  | 	0x0c, 0x25, 0x25, 0x24, 0x25, 0x25, 0x24, 0x23, | ||||||
|  | 	0x22, 0x21, 0x20, 0x23, 0x21, 0x21, 0x22, 0x21, | ||||||
|  | 	0x2d, 0x38, 0x00, 0x28, 0xb0, 0x00, 0x00, 0x22, | ||||||
|  | 	0x00, 0x00, 0xc0, 0xfe, 0x03, 0x00, 0xc0, 0x00, | ||||||
|  | 	0x62, 0xff, 0x62, 0xff, 0xfe, 0x06, 0x00, 0xbb, | ||||||
|  | 	0xff, 0xba, 0xff, 0xfe, 0x08, 0x00, 0x9e, 0xff, | ||||||
|  | 	0xfe, 0x0a, 0x00, 0x53, 0xff, 0xfe, 0x02, 0x00, | ||||||
|  | 	0x20, 0xff, 0xb1, 0xfe, 0xfe, 0xb2, 0xfe, 0xfe, | ||||||
|  | 	0xed, 0xfe, 0xfe, 0xfe, 0x04, 0x00, 0x3a, 0xff, | ||||||
|  | 	0x3a, 0xff, 0xde, 0xfd, 0x5f, 0x04, 0x33, 0xff, | ||||||
|  | 	0x4c, 0x74, 0x03, 0x05, 0x05, 0xff, 0x6d, 0xfe, | ||||||
|  | 	0xfe, 0x6d, 0xfe, 0xfe, 0xaf, 0x08, 0x63, 0xff, | ||||||
|  | 	0x64, 0x6f, 0x08, 0xac, 0xff, 0xbf, 0x6d, 0x08, | ||||||
|  | 	0x7a, 0x6d, 0x08, 0x96, 0x74, 0x04, 0x00, 0x08, | ||||||
|  | 	0x79, 0xff, 0xda, 0xfe, 0xfe, 0xdb, 0xfe, 0xfe, | ||||||
|  | 	0x56, 0xff, 0xfe, 0x04, 0x00, 0x5e, 0xff, 0x5e, | ||||||
|  | 	0xff, 0x6c, 0xfe, 0xfe, 0xfe, 0x06, 0x00, 0x41, | ||||||
|  | 	0xff, 0x7f, 0x74, 0x03, 0x00, 0x11, 0x44, 0xff, | ||||||
|  | 	0xa9, 0xfe, 0xfe, 0xa9, 0xfe, 0xfe, 0xa5, 0x8f, | ||||||
|  | 	0x01, 0x00, 0x08, 0x01, 0x01, 0x02, 0x04, 0x08, | ||||||
|  | 	0x02, 0x04, 0x08, 0x08, 0x01, 0x01, 0xfe, 0x22, | ||||||
|  | 	0x00, 0x4c, 0x60, 0x64, 0x8c, 0x90, 0xd0, 0xd4, | ||||||
|  | 	0xd8, 0x5c, 0x10, 0x09, 0xd8, 0xff, 0xb0, 0xff, | ||||||
|  | 	0x00, 0x00, 0xba, 0xff, 0x14, 0x00, 0xba, 0xff, | ||||||
|  | 	0x64, 0x00, 0x00, 0x08, 0xfe, 0x06, 0x00, 0x74, | ||||||
|  | 	0xff, 0x42, 0xff, 0xce, 0xff, 0x60, 0xff, 0x0a, | ||||||
|  | 	0x00, 0xb4, 0x00, 0xa0, 0x00, 0xa0, 0xfe, 0x07, | ||||||
|  | 	0x00, 0x0a, 0x00, 0xb0, 0xff, 0x96, 0x4d, 0x00, | ||||||
|  | 	0x56, 0x57, 0x18, 0xa6, 0xff, 0x92, 0x70, 0x11, | ||||||
|  | 	0x00, 0x12, 0x90, 0x90, 0x76, 0x5a, 0x54, 0x54, | ||||||
|  | 	0x4c, 0x46, 0x38, 0x00, 0x10, 0x10, 0x08, 0xfe, | ||||||
|  | 	0x05, 0x00, 0x38, 0x29, 0x25, 0x23, 0x22, 0x22, | ||||||
|  | 	0x1f, 0x00, 0x00, 0x00, 0xf6, 0xe1, 0xdd, 0xf8, | ||||||
|  | 	0xfe, 0x00, 0xfe, 0x15, 0x00, 0x00, 0xd0, 0x02, | ||||||
|  | 	0x74, 0x02, 0x08, 0xf8, 0xe5, 0xde, 0x02, 0x04, | ||||||
|  | 	0x04, 0xfd, 0x00, 0x00, 0x00, 0x07, 0x50, 0x2d, | ||||||
|  | 	0x01, 0x90, 0x90, 0x76, 0x60, 0xb0, 0x07, 0x07, | ||||||
|  | 	0x0c, 0x0c, 0x04, 0xfe, 0x05, 0x00, 0x66, 0x66, | ||||||
|  | 	0x5a, 0x56, 0xbc, 0x01, 0x06, 0xfc, 0xfc, 0xf1, | ||||||
|  | 	0xfe, 0x07, 0x00, 0x24, 0x95, 0x70, 0x64, 0x18, | ||||||
|  | 	0x06, 0x2c, 0xff, 0xb5, 0xfe, 0xfe, 0xb5, 0xfe, | ||||||
|  | 	0xfe, 0xe2, 0x8c, 0x24, 0x02, 0x2f, 0xff, 0x2f, | ||||||
|  | 	0xff, 0xb4, 0x78, 0x02, 0x05, 0x73, 0xff, 0xed, | ||||||
|  | 	0xfe, 0xfe, 0x4f, 0xff, 0x36, 0x74, 0x1e, 0x09, | ||||||
|  | 	0x4f, 0xff, 0x50, 0xff, 0xfe, 0x16, 0x00, 0x70, | ||||||
|  | 	0xac, 0x70, 0x8e, 0xac, 0x40, 0x0e, 0x01, 0x70, | ||||||
|  | 	0x7f, 0x8e, 0xac, 0x6c, 0x00, 0x0b, 0xfe, 0x02, | ||||||
|  | 	0x00, 0xfe, 0x0a, 0x2c, 0x2a, 0x2a, 0x28, 0x26, | ||||||
|  | 	0x1e, 0x1e, 0xfe, 0x02, 0x20, 0x65, 0x20, 0x00, | ||||||
|  | 	0x00, 0x05, 0x12, 0x00, 0x11, 0x1e, 0x11, 0x11, | ||||||
|  | 	0x41, 0x1e, 0x41, 0x11, 0x31, 0x1e, 0x31, 0x11, | ||||||
|  | 	0x70, 0x75, 0x7a, 0x7f, 0x84, 0x89, 0x8e, 0x93, | ||||||
|  | 	0x98, 0x30, 0x20, 0x00, 0x02, 0x00, 0xfe, 0x06, | ||||||
|  | 	0x3c, 0xbc, 0x32, 0x0c, 0x00, 0x00, 0x2a, 0x12, | ||||||
|  | 	0x1e, 0x12, 0x2e, 0x12, 0xcc, 0x12, 0x11, 0x1a, | ||||||
|  | 	0x1e, 0x1a, 0x2e, 0x1a, 0x4c, 0x10, 0x1e, 0x10, | ||||||
|  | 	0x11, 0x18, 0x1e, 0x42, 0x1e, 0x42, 0x2e, 0x42, | ||||||
|  | 	0xcc, 0x42, 0x11, 0x4a, 0x1e, 0x4a, 0x2e, 0x4a, | ||||||
|  | 	0x4c, 0x40, 0x1e, 0x40, 0x11, 0x48, 0x1e, 0x32, | ||||||
|  | 	0x1e, 0x32, 0x2e, 0x32, 0xcc, 0x32, 0x11, 0x3a, | ||||||
|  | 	0x1e, 0x3a, 0x2e, 0x3a, 0x4c, 0x30, 0x1e, 0x30, | ||||||
|  | 	0x11, 0x38, 0x1e, 0x27, 0x9a, 0x01, 0x9d, 0xa2, | ||||||
|  | 	0x2f, 0x28, 0x00, 0x00, 0x46, 0xde, 0xc4, 0xbf, | ||||||
|  | 	0xa6, 0x9d, 0x81, 0x7b, 0x5c, 0x61, 0x40, 0xc7, | ||||||
|  | 	0xc0, 0xae, 0xa9, 0x8c, 0x83, 0x6a, 0x62, 0x50, | ||||||
|  | 	0x3e, 0xce, 0xc2, 0xae, 0xa3, 0x8c, 0x7b, 0x6a, | ||||||
|  | 	0x5a, 0x50, 0x35, 0xd7, 0xc2, 0xb7, 0xa4, 0x95, | ||||||
|  | 	0x7e, 0x72, 0x5a, 0x59, 0x37, 0xfe, 0x02, 0xf8, | ||||||
|  | 	0x8c, 0x95, 0x90, 0x8f, 0x00, 0xd7, 0xc0, 0xb7, | ||||||
|  | 	0xa2, 0x95, 0x7b, 0x72, 0x56, 0x59, 0x32, 0xc7, | ||||||
|  | 	0xc3, 0xae, 0xad, 0x8c, 0x85, 0x6a, 0x63, 0x50, | ||||||
|  | 	0x3e, 0xce, 0xc3, 0xae, 0xa4, 0x8c, 0x7c, 0x6a, | ||||||
|  | 	0x59, 0x50, 0x34, 0xd7, 0xc2, 0xb7, 0xa5, 0x95, | ||||||
|  | 	0x7e, 0x72, 0x59, 0x59, 0x36, 0xfc, 0x05, 0x00, | ||||||
|  | 	0x02, 0xce, 0xc5, 0xae, 0xa5, 0x95, 0x83, 0x72, | ||||||
|  | 	0x5c, 0x59, 0x36, 0xbf, 0xc6, 0xa5, 0xab, 0x8c, | ||||||
|  | 	0x8c, 0x6a, 0x67, 0x50, 0x41, 0x64, 0x07, 0x00, | ||||||
|  | 	0x02, 0x95, 0x8c, 0x72, 0x65, 0x59, 0x3f, 0xce, | ||||||
|  | 	0xc7, 0xae, 0xa8, 0x95, 0x86, 0x72, 0x5f, 0x59, | ||||||
|  | 	0x39, 0xfe, 0x02, 0xf8, 0x8b, 0x7c, 0x0b, 0x09, | ||||||
|  | 	0xb7, 0xc2, 0x9d, 0xa4, 0x83, 0x85, 0x6a, 0x6b, | ||||||
|  | 	0x50, 0x44, 0xb7, 0xc1, 0x64, 0x01, 0x00, 0x06, | ||||||
|  | 	0x61, 0x5d, 0x48, 0x3d, 0xae, 0xc4, 0x9d, 0xad, | ||||||
|  | 	0x7b, 0x85, 0x61, 0x66, 0x48, 0x46, 0xae, 0xc3, | ||||||
|  | 	0x95, 0xa3, 0x72, 0x7c, 0x59, 0x56, 0x38, 0x31, | ||||||
|  | 	0x7c, 0x0b, 0x00, 0x0c, 0x96, 0x91, 0x8f, 0x00, | ||||||
|  | 	0xb7, 0xc0, 0xa5, 0xab, 0x8c, 0x8a, 0x6a, 0x64, | ||||||
|  | 	0x50, 0x3c, 0xb7, 0xc0, 0x9d, 0xa0, 0x83, 0x80, | ||||||
|  | 	0x6a, 0x64, 0x50, 0x3d, 0xb7, 0xc5, 0x9d, 0xa5, | ||||||
|  | 	0x83, 0x87, 0x6c, 0x08, 0x07, 0xae, 0xc0, 0x9d, | ||||||
|  | 	0xa8, 0x83, 0x88, 0x6a, 0x6d, 0x50, 0x46, 0xfc, | ||||||
|  | 	0x05, 0x00, 0x16, 0xbf, 0xc0, 0xa5, 0xa2, 0x8c, | ||||||
|  | 	0x7f, 0x6a, 0x57, 0x50, 0x2f, 0xb7, 0xc7, 0xa5, | ||||||
|  | 	0xb1, 0x8c, 0x8e, 0x72, 0x6d, 0x59, 0x45, 0xbf, | ||||||
|  | 	0xc6, 0xa5, 0xa8, 0x8c, 0x87, 0x6a, 0x5f, 0x50, | ||||||
|  | 	0x37, 0xbf, 0xc2, 0xa5, 0xa4, 0x8c, 0x83, 0x6a, | ||||||
|  | 	0x5c, 0x50, 0x34, 0xbc, 0x05, 0x00, 0x0e, 0x90, | ||||||
|  | 	0x00, 0xc7, 0xc2, 0xae, 0xaa, 0x95, 0x82, 0x7b, | ||||||
|  | 	0x60, 0x61, 0x3f, 0xb7, 0xc6, 0xa5, 0xb1, 0x8c, | ||||||
|  | 	0x8d, 0x72, 0x6b, 0x61, 0x51, 0xbf, 0xc4, 0xa5, | ||||||
|  | 	0xa5, 0x8c, 0x82, 0x72, 0x61, 0x59, 0x39, 0x6c, | ||||||
|  | 	0x26, 0x03, 0x95, 0x82, 0x7b, 0x61, 0x61, 0x40, | ||||||
|  | 	0xfc, 0x05, 0x00, 0x00, 0x7e, 0xd7, 0xc3, 0xb7, | ||||||
|  | 	0xa8, 0x9d, 0x80, 0x83, 0x5d, 0x6a, 0x3f, 0xbf, | ||||||
|  | 	0xc7, 0xa5, 0xa8, 0x8c, 0x84, 0x72, 0x60, 0x61, | ||||||
|  | 	0x46, 0xbf, 0xc2, 0xae, 0xb0, 0x9d, 0x92, 0x83, | ||||||
|  | 	0x6f, 0x6a, 0x50, 0xd7, 0xc3, 0xb7, 0xa7, 0x9d, | ||||||
|  | 	0x80, 0x83, 0x5e, 0x6a, 0x40, 0xfe, 0x02, 0xf8, | ||||||
|  | 	0x8d, 0x96, 0x90, 0x90, 0xfe, 0x05, 0x00, 0x8a, | ||||||
|  | 	0xc4, 0x63, 0xb8, 0x3c, 0xa6, 0x29, 0x97, 0x16, | ||||||
|  | 	0x81, 0x84, 0xb7, 0x5b, 0xa9, 0x33, 0x94, 0x1e, | ||||||
|  | 	0x83, 0x11, 0x70, 0xb8, 0xc2, 0x70, 0xb1, 0x4d, | ||||||
|  | 	0xa3, 0x2a, 0x8d, 0x1b, 0x7b, 0xa8, 0xbc, 0x68, | ||||||
|  | 	0xab, 0x47, 0x9d, 0x27, 0x87, 0x18, 0x75, 0xae, | ||||||
|  | 	0xc6, 0x7d, 0xbb, 0x4d, 0xaa, 0x1c, 0x84, 0x11, | ||||||
|  | 	0x72, 0xa3, 0xbb, 0x6e, 0xad, 0x3c, 0x97, 0x24, | ||||||
|  | 	0x85, 0x16, 0x71, 0x80, 0xb2, 0x57, 0xa4, 0x30, | ||||||
|  | 	0x8e, 0x1c, 0x7c, 0x10, 0x68, 0xbb, 0xbd, 0x75, | ||||||
|  | 	0xac, 0x4f, 0x9e, 0x2b, 0x87, 0x1a, 0x76, 0x96, | ||||||
|  | 	0xc5, 0x5e, 0xb5, 0x3e, 0xa5, 0x1f, 0x8c, 0x12, | ||||||
|  | 	0x7a, 0xc1, 0xc6, 0x42, 0x9f, 0x27, 0x8c, 0x16, | ||||||
|  | 	0x77, 0x0f, 0x67, 0x9d, 0xbc, 0x68, 0xad, 0x36, | ||||||
|  | 	0x95, 0x20, 0x83, 0x11, 0x6d, 0x9b, 0xb8, 0x67, | ||||||
|  | 	0xa8, 0x34, 0x90, 0x1f, 0x7c, 0x10, 0x67, 0x9e, | ||||||
|  | 	0xc9, 0x6a, 0xbb, 0x37, 0xa4, 0x20, 0x90, 0x11, | ||||||
|  | 	0x7b, 0xc6, 0xc8, 0x47, 0xa4, 0x2a, 0x90, 0x18, | ||||||
|  | 	0x7b, 0x10, 0x6c, 0xae, 0xc4, 0x5d, 0xad, 0x37, | ||||||
|  | 	0x9a, 0x1f, 0x85, 0x13, 0x75, 0x70, 0xad, 0x42, | ||||||
|  | 	0x99, 0x25, 0x84, 0x17, 0x74, 0x0b, 0x56, 0x87, | ||||||
|  | 	0xc8, 0x57, 0xb8, 0x2b, 0x9e, 0x19, 0x8a, 0x0d, | ||||||
|  | 	0x74, 0xa7, 0xc8, 0x6e, 0xb9, 0x36, 0xa0, 0x1f, | ||||||
|  | 	0x8b, 0x11, 0x75, 0x94, 0xbe, 0x4b, 0xa5, 0x2a, | ||||||
|  | 	0x92, 0x18, 0x7c, 0x0f, 0x6b, 0xaf, 0xc0, 0x58, | ||||||
|  | 	0xa8, 0x34, 0x94, 0x1d, 0x7d, 0x12, 0x6d, 0x82, | ||||||
|  | 	0xc0, 0x52, 0xb0, 0x25, 0x94, 0x14, 0x7f, 0x0c, | ||||||
|  | 	0x68, 0x84, 0xbf, 0x3e, 0xa4, 0x22, 0x8e, 0x10, | ||||||
|  | 	0x76, 0x0b, 0x65, 0x88, 0xb6, 0x42, 0x9b, 0x26, | ||||||
|  | 	0x87, 0x14, 0x70, 0x0c, 0x5f, 0xc5, 0xc2, 0x3e, | ||||||
|  | 	0x97, 0x23, 0x83, 0x13, 0x6c, 0x0c, 0x5c, 0xb1, | ||||||
|  | 	0xc9, 0x76, 0xbc, 0x4a, 0xaa, 0x20, 0x8d, 0x12, | ||||||
|  | 	0x78, 0x93, 0xbf, 0x46, 0xa3, 0x26, 0x8d, 0x14, | ||||||
|  | 	0x74, 0x0c, 0x62, 0xc8, 0xc4, 0x3b, 0x97, 0x21, | ||||||
|  | 	0x82, 0x11, 0x6a, 0x0a, 0x59, 0xa3, 0xb9, 0x68, | ||||||
|  | 	0xa9, 0x30, 0x8d, 0x1a, 0x78, 0x0f, 0x61, 0xa0, | ||||||
|  | 	0xc9, 0x73, 0xbe, 0x50, 0xb1, 0x30, 0x9f, 0x14, | ||||||
|  | 	0x80, 0x83, 0xb7, 0x3c, 0x9a, 0x20, 0x84, 0x0e, | ||||||
|  | 	0x6a, 0x0a, 0x57, 0xac, 0xc2, 0x68, 0xb0, 0x2e, | ||||||
|  | 	0x92, 0x19, 0x7c, 0x0d, 0x63, 0x93, 0xbe, 0x62, | ||||||
|  | 	0xb0, 0x3c, 0x9e, 0x1a, 0x80, 0x0e, 0x6b, 0xbb, | ||||||
|  | 	0x02, 0xa0, 0x02, 0xa0, 0x02, 0x6f, 0x00, 0x75, | ||||||
|  | 	0x00, 0x75, 0x00, 0x00, 0x00, 0xad, 0x02, 0xb3, | ||||||
|  | 	0x02, 0x6f, 0x00, 0x87, 0x00, 0x85, 0xfe, 0x03, | ||||||
|  | 	0x00, 0xc2, 0x02, 0x82, 0x4d, 0x92, 0x6e, 0x4d, | ||||||
|  | 	0xb1, 0xa8, 0x84, 0x01, 0x00, 0x07, 0x7e, 0x00, | ||||||
|  | 	0xa8, 0x02, 0xa4, 0x02, 0xa4, 0x02, 0xa2, 0x00, | ||||||
|  | 	0xa6, 0x00, 0xa6, 0x00, 0x00, 0x00, 0xb4, 0x02, | ||||||
|  | 	0xb4, 0x02, 0x92, 0x00, 0x96, 0x00, 0x96, 0x46, | ||||||
|  | 	0x04, 0xb0, 0x02, 0x64, 0x02, 0x0a, 0x8c, 0x00, | ||||||
|  | 	0x90, 0x02, 0x98, 0x02, 0x98, 0x02, 0x0e, 0x01, | ||||||
|  | 	0x11, 0x01, 0x11, 0x50, 0xc3, 0x08, 0x88, 0x02, | ||||||
|  | 	0x88, 0x02, 0x19, 0x01, 0x02, 0x01, 0x02, 0x01, | ||||||
|  | 	0xf3, 0x2d, 0x00, 0x00 | ||||||
|  | }; | ||||||
|  |  | ||||||
| /* Array of known hw_options bits with human-friendly parsing */ | /* Array of known hw_options bits with human-friendly parsing */ | ||||||
| static struct hc_hwopt { | static struct hc_hwopt { | ||||||
| 	const u32 bit; | 	const u32 bit; | ||||||
| @@ -287,6 +471,76 @@ fail: | |||||||
| 	return ret; | 	return ret; | ||||||
| } | } | ||||||
|  |  | ||||||
|  | /* | ||||||
|  |  * If the RB_ID_WLAN_DATA payload starts with RB_MAGIC_LZOR, then past | ||||||
|  |  * that magic number is a payload that must be appended to the hc_lzor_prefix, | ||||||
|  |  * the resulting blob is LZO-compressed. In the LZO decompression result, | ||||||
|  |  * the RB_MAGIC_ERD magic number (aligned) must be located. Following that | ||||||
|  |  * magic, there is a routerboot tag node (id 0x1) locating the RLE-encoded | ||||||
|  |  * calibration data payload. | ||||||
|  |  */ | ||||||
|  | static int hc_wlan_data_unpack_lzor(const u8 *inbuf, size_t inlen, | ||||||
|  | 				    void *outbuf, size_t *outlen) | ||||||
|  | { | ||||||
|  | 	u16 rle_ofs, rle_len; | ||||||
|  | 	size_t templen; | ||||||
|  | 	u8 *tempbuf; | ||||||
|  | 	int ret; | ||||||
|  |  | ||||||
|  | 	templen = inlen + sizeof(hc_lzor_prefix); | ||||||
|  | 	if (templen > *outlen) | ||||||
|  | 		return -EFBIG; | ||||||
|  |  | ||||||
|  | 	/* Temporary buffer same size as the outbuf */ | ||||||
|  | 	tempbuf = kmalloc(*outlen, GFP_KERNEL); | ||||||
|  | 	if (!outbuf) | ||||||
|  | 		return -ENOMEM; | ||||||
|  |  | ||||||
|  | 	/* Concatenate into the outbuf */ | ||||||
|  | 	memcpy(outbuf, hc_lzor_prefix, sizeof(hc_lzor_prefix)); | ||||||
|  | 	memcpy(outbuf + sizeof(hc_lzor_prefix), inbuf, inlen); | ||||||
|  |  | ||||||
|  | 	/* LZO-decompress templen bytes of outbuf into the tempbuf */ | ||||||
|  | 	ret = lzo1x_decompress_safe(outbuf, templen, tempbuf, outlen); | ||||||
|  | 	if (ret) { | ||||||
|  | 		pr_debug(RB_HC_PR_PFX "LZO decompression error (%d)\n", ret); | ||||||
|  | 		goto fail; | ||||||
|  | 	} | ||||||
|  | 	templen = *outlen; | ||||||
|  |  | ||||||
|  | 	/* | ||||||
|  | 	 * Post decompression we have a blob (possibly byproduct of the lzo | ||||||
|  | 	 * dictionary). We need to find RB_MAGIC_ERD. The magic number seems to | ||||||
|  | 	 * be 32bit-aligned in the decompression output. | ||||||
|  | 	 */ | ||||||
|  |  | ||||||
|  | 	while (RB_MAGIC_ERD != *(u32 *)tempbuf) { | ||||||
|  | 		tempbuf += 4; | ||||||
|  | 		templen -= 4; | ||||||
|  | 	} | ||||||
|  |  | ||||||
|  | 	/* Past magic. Look for tag node */ | ||||||
|  | 	ret = routerboot_tag_find(tempbuf, templen, 0x1, &rle_ofs, &rle_len); | ||||||
|  | 	if (ret) { | ||||||
|  | 		pr_debug(RB_HC_PR_PFX "RLE data not found\n"); | ||||||
|  | 		goto fail; | ||||||
|  | 	} | ||||||
|  |  | ||||||
|  | 	if (rle_len > templen) { | ||||||
|  | 		pr_debug(RB_HC_PR_PFX "Invalid RLE data length\n"); | ||||||
|  | 		goto fail; | ||||||
|  | 	} | ||||||
|  |  | ||||||
|  | 	/* RLE-decode tempbuf back into the outbuf */ | ||||||
|  | 	ret = routerboot_rle_decode(tempbuf+rle_ofs, rle_len, outbuf, outlen); | ||||||
|  | 	if (ret) | ||||||
|  | 		pr_debug(RB_HC_PR_PFX "RLE decoding error (%d)\n", ret); | ||||||
|  |  | ||||||
|  | fail: | ||||||
|  | 	kfree(tempbuf); | ||||||
|  | 	return ret; | ||||||
|  | } | ||||||
|  |  | ||||||
| static int hc_wlan_data_unpack(const size_t tofs, size_t tlen, | static int hc_wlan_data_unpack(const size_t tofs, size_t tlen, | ||||||
| 			       void *outbuf, size_t *outlen) | 			       void *outbuf, size_t *outlen) | ||||||
| { | { | ||||||
| @@ -303,6 +557,12 @@ static int hc_wlan_data_unpack(const size_t tofs, size_t tlen, | |||||||
|  |  | ||||||
| 	ret = -ENODATA; | 	ret = -ENODATA; | ||||||
| 	switch (magic) { | 	switch (magic) { | ||||||
|  | 	case RB_MAGIC_LZOR: | ||||||
|  | 		/* Skip magic */ | ||||||
|  | 		lbuf += sizeof(magic); | ||||||
|  | 		tlen -= sizeof(magic); | ||||||
|  | 		ret = hc_wlan_data_unpack_lzor(lbuf, tlen, outbuf, outlen); | ||||||
|  | 		break; | ||||||
| 	case RB_MAGIC_ERD: | 	case RB_MAGIC_ERD: | ||||||
| 		/* Skip magic */ | 		/* Skip magic */ | ||||||
| 		lbuf += sizeof(magic); | 		lbuf += sizeof(magic); | ||||||
|   | |||||||
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