Fix: cannot run in background

doc/protocol.md

@@ -0,0 +1,132 @@
+# Protocol
+
+## login_packet
+
+### DrComHeader 0-3
+
+0x03 0x01 0x00 len(username)+20->1B
+
+### PasswordMD5 4-19
+
+MD5(0x03 0x01 seed(4B) password(var))->16B
+
+### username 20-55
+
+username(var)
+
+### ControlCheckStatus 56
+
+ControlCheckStatus
+
+### AdapterNum 57
+
+AdapterNum
+
+### MacAddrXORPasswordMD5 58-63
+
+MAC^PasswordMD5
+
+### PasswordMD5_2 64-79
+
+MD5(0x01 password(var) seed(4B))->16B
+
+### HostIpNum 80
+
+0x01
+
+### HostIpList 81-96
+
+HostIP(4B), 0x00*12
+
+### HalfMD5 97-104
+
+MD5(login_packet(0-96),0x14,0x00,0x07,0x0b)->first half, 8b
+
+### DogFlag 105
+
+IPDOG
+
+### host_name 110-141
+
+host_name(var)
+
+### PrimaryDNS 142-145
+
+PrimaryDNS(4B)
+
+### DHCP 146-149
+
+DHCP(4B)
+
+### OSVersionInfoSize 162-165
+
+0x94 0x00 0x00 0x00
+
+### MajorVersion 166-169
+
+0x10 0x00 0x00 0x00
+
+### MinorVersion 170-173
+
+0x00 0x00 0x00 0x00
+
+### BuildNumber 174-177
+
+0x00 0x28 0x00 0x00
+
+### PlatformID 178-181
+
+0x02 0x00 0x00 0x00
+
+### AuthVersion 310-311
+
+AUTH_VERSION(2B)
+
+*Non-ROR* version
+
+### Code 312
+
+0x02
+
+### Len 313
+
+0x0c
+
+### CRC 314-317
+
+crc(login_packet(314B),0x01,0x26,0x07,0x11,mac(6B))->4B
+
+```c
+    sum = 1234;
+    uint64_t ret = 0;
+    for (int i = 0; i < counter + 14; i += 4) {
+        ret = 0;
+        // reverse unsigned char array[4]
+        for (int j = 4; j > 0; j--) {
+            ret = ret * 256 + (int)checksum2_str[i + j - 1];
+        }
+        sum ^= ret;
+    }
+    sum = (1968 * sum) & 0xffffffff;
+    for (int j = 0; j < 4; j++) {
+        checksum2[j] = (unsigned char)(sum >> (j * 8) & 0xff);
+    }
+```
+
+### AdapterAddress 320-325
+
+MAC(6B)
+
+### BroadcastMode 326
+
+0xe9
+
+### unknown 327
+
+0x13
+
+## Keepalive1
+
+*no* keepalive1_mod
+
+###