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generic: platform/mikrotik: support LZOR encoding

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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>
v19.07.3_mercusys_ac12_duma
Thibaut VARÈNE 4 years ago committed by Koen Vandeputte
parent 612b64e6c4
commit fa2369e59b
1 changed files with 261 additions and 1 deletions
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262
target/linux/generic/files/drivers/platform/mikrotik/rb_hardconfig.c
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@ -36,7 +36,7 @@
#include "routerboot.h"
#define RB_HARDCONFIG_VER "0.01"
#define RB_HARDCONFIG_VER "0.02"
#define RB_HC_PR_PFX "[rb_hardconfig] "
/* 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 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 */
static struct hc_hwopt {
const u32 bit;
@ -287,6 +471,76 @@ fail:
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,
void *outbuf, size_t *outlen)
{
@ -303,6 +557,12 @@ static int hc_wlan_data_unpack(const size_t tofs, size_t tlen,
ret = -ENODATA;
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:
/* Skip magic */
lbuf += sizeof(magic);

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