gcc cross compiler union compatible issue.

有些platform 的struct or union 預設為4個bytes(一般會預期應該要2個bytes)

目前可用

__attribute__((__packed__))來解決

其它的code要小心有沒有類似的問題

typedef union _MACHTTRANSMIT_SETTING {         unsigned short word;         union //short 2 bytes，但有些可能 assign 4 bytes         {                 unsigned short MCS:7; // MCS                 unsigned short BW:1; //channel bandwidth 20MHz or 40 MHz                 unsigned short ShortGI:1;                 unsigned short STBC:2; //SPACE                 unsigned short rsv:3;                 unsigned short MODE:2; // Use definition MODE_xxx.         } __attribute__((__packed__))field; }__attribute__((__packed__)) MACHTTRANSMIT_SETTING, *PMACHTTRANSMIT_SETTING; int main(int argc, char *argv[]) {         MACHTTRANSMIT_SETTING m;         printf("m: %d, m->word:%d@%p\n", sizeof(m), sizeof(m.word), &m.word);         printf("m: %d, m->:%d@%p\n", sizeof(m), sizeof(m.word), &m.word);         printf("ok: %d, m->:%d@%p\n", sizeof(m), sizeof(m.field), &m.field); }
X86	others
peter@team-server:~$ ./a.out m: 2, m->word:2@0xbff97a32 m: 2, m->:2@0xbff97a32 ok: 2, m->:1@0xbff97a32	/tmp/rootfs # ./a.out m: 2, m->word:2@0x4261fcd4 m: 2, m->:2@0x4261fcd4 ok: 2, m->:1@0x4261fcd4

how to change default stack size...

方法一:

gcc -Wl,--defsym,__stacksize=0x80000 -o foo foo.c

方法二:

peter@team-server:sbin$ arm-elf-readelf -l foo

Elf file type is EXEC (Executable file)

Entry point 0x37fc

There are 6 program headers, starting at offset 52

Program Headers:

  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align

  PHDR           0x000034 0x00000034 0x00000034 0x000c0 0x000c0 R E 0x4

  INTERP         0x0000f4 0x000000f4 0x000000f4 0x00014 0x00014 R   0x1

      [Requesting program interpreter: /lib/ld-uClibc.so.0]

  LOAD           0x000000 0x00000000 0x00000000 0x1f668 0x1f668 R E 0x1000

  LOAD           0x01f668 0x00020668 0x00020668 0x0b718 0x0ba98 RW  0x1000

  DYNAMIC        0x01f67c 0x0002067c 0x0002067c 0x000c8 0x000c8 RW  0x4

  GNU_STACK      0x000000 0x00000000 0x00000000 0x00000 0x20000 RWE 0x8 //原來的stack為256KB

 Section to Segment mapping:

  Segment Sections...

   00

   01     .interp

   02     .interp .hash .dynsym .dynstr .rel.dyn .rel.plt .init .plt .text .fini .rofixup

   03     .ctors .dtors .jcr .dynamic .data .got .bss

   04     .dynamic

   05

peter@team-server:sbin$

peter@team-server:sbin$ ../../../fdpichdr/fdpichdr -s 0x100000  foo

peter@team-server:sbin$ arm-elf-readelf -l foo

Elf file type is EXEC (Executable file)

Entry point 0x37fc

There are 6 program headers, starting at offset 52

Program Headers:

  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align

  PHDR           0x000034 0x00000034 0x00000034 0x000c0 0x000c0 R E 0x4

  INTERP         0x0000f4 0x000000f4 0x000000f4 0x00014 0x00014 R   0x1

      [Requesting program interpreter: /lib/ld-uClibc.so.0]

  LOAD           0x000000 0x00000000 0x00000000 0x1f668 0x1f668 R E 0x1000

  LOAD           0x01f668 0x00020668 0x00020668 0x0b718 0x0ba98 RW  0x1000

  DYNAMIC        0x01f67c 0x0002067c 0x0002067c 0x000c8 0x000c8 RW  0x4

  GNU_STACK      0x000000 0x00000000 0x00000000 0x00000 0x100000 RWE 0x8    //現在有1MB

 Section to Segment mapping:

  Segment Sections...

   00

   01     .interp

   02     .interp .hash .dynsym .dynstr .rel.dyn .rel.plt .init .plt .text .fini .rofixup

   03     .ctors .dtors .jcr .dynamic .data .got .bss

   04     .dynamic

   05     .bss

office 2007 快速鍵

http://www.ithome.com.tw/itadm/article.php?c=46929
http://bbs.mychat.to/reads.php?tid=781220
http://272586.blogspot.com/2008/05/excel_22.html

Keyboard Shortcut	Result in Excel 2000 - General
F1 Key	Help
F2 Key	Edit current Cell
F5 Key	Goto
F7 Key	Spell Check
F12 Key	Save file as
CTRL and A	Select entire worksheet.
CTRL and B	Toggle Bold Text.
CTRL and C	Copies the item or items selected to the Clipboard and can be pasted using CTRL and V.
CTRL and F	Displays the Find dialog box.
CTRL and H	Displays the Replace dialog box.
CTRL and I	Toggles Italic Text.
CTRL and N	New File.
CTRL and O	Open File.
CTRL and P	Print.
CTRL and S	Save File.
CTRL and U	Toggles Underlined Text.
CTRL and V	Paste the contents of the clipboard.
CTRL and X	Cut the selected item.
CTRL and Y	Redo the last undone action
CTRL and Z	Undoes the last action.
CTRL and 1	Displays Format Cells Dialogue Box
CTRL and 5	Toggles Strikethrough Text

---

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---

Keyboard Shortcut	Result in Excel 2000 - Formulas
ALT and =	Autosum
ALT and F8	Macros
CTRL and ;	Insert Current Date
CTRL and :	Insert Current Time

---

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---

Keyboard Shortcut	Result in Excel 2000 - Movement
Left Arrow	One Cell Left (also SHIFT and TAB)
Right Arrow	One Cell Right (also TAB)
Up Arrow	One Cell Up
Down Arrow	One Cell Down
Home	Go to End of row
CTRL and left Arrow	Go to End of Column
CTRL and Home	Go to Top of Worksheet (A1)
CTRL and End	Go to End of Worksheet
CTRL and PAGE-DOWN	Go to Next Worksheet

---

back to top | © Copyright 2001-2010 helpwithpcs.com

---

Keyboard Shortcut	Result in Excel 2000 - Cell Selection
CTRL and Spacebar	Select the entire Column
SHIFT and Spacebar	Select the entire Row
CTRL and A	Select Entire Worksheet
SHIFT and Left Cursor	Select all cells to the left of the active one
SHIFT and Right Cursor	Select all cells to the right of the active one

LAB L2TPD + IPSec in NONE-MMU

l2tpd: rp-l2tpd
ipsec: openswan patched.


------------------------------------------
config:

peter@team-server:ppp$ cat l2tpd.conf

# comment

# Global section (by default, we start in global mode)
global

# Load handlers
load-handler "sync-pppd.so"
load-handler "cmd.so"

# Bind address
listen-port 1701

# Configure the sync-pppd handler.  You MUST have a "section sync-pppd" line
# even if you don't set any options.
section sync-pppd
pppd-path /sbin/pppd
lns-pppd-opts "require-pap 10.0.0.1:10.0.0.2 lcp-echo-interval 30 lcp-echo-failure 6"
lac-pppd-opts "user exampe name example noipdefault ipcp-accept-local ipcp-accept-remote lcp-echo-interval 30 lcp-echo-failure 6"

# Peer section
section peer
peer 172.21.33.92 #-----(1)
#secret s3cr3t ---------(2)

port 1701

hide-avps no

section cmd

------------------------

(1). please modify remote client IP correctly.

(2). if uncomment it, an error message show as: stop_conntrol on L2TP tunnel phase.?

lns-handler sync-pppd  0.002 51449/0: Peer host name is 'test-55e98b2637'

   0.003 l2tp_peer_find(172.21.33.92) examining peer 172.21.33.92/32

   0.004 l2tp_peer_find(172.21.33.92) found 172.21.33.92/32

   0.005 auth_gen_response(secret=s3cr3t) -> a49eacc864ed2f63d48973e8571f56d7

######################################


#cat options
#noipdefault
#defaultroute
#passive
debug
refuse-eap
lcp-echo-interval 30
lcp-echo-failure 4


require-pap
maxfail 3
#user "sw2_vpn_user" #---(1)
mtu  1400
mru  1400
auth  #noauth #--(2)
noaccomp
nopcomp
noccp
-am

------------------------

(1). if uncomment options "user". it will shown blow message!

Mar 18 19:56:43 DIR865 user.notice The remote system is required to authenticate itself
Mar 18 19:56:43 DIR865 daemon.err pppd[2848]: The remote system is required to authenticate itself
Mar 18 19:56:43 DIR865 user.notice pppd
Mar 18 19:56:43 DIR865 user.notice :
Mar 18 19:56:43 DIR865 user.notice but I couldn't find any suitable secret (password) for it to use to do so.
Mar 18 19:56:43 DIR865 daemon.err pppd[2848]: but I couldn't find any suitable secret (password) for it to use to do so.

(2). noauth is used to "said: I am server. and did need not PAP nor CHAP authentication, so you guy are allowed just get  by IPCP.

openswn porting

這回改到porting openswan的問題

在quick mode negotiate completed後要用netlink加sa到xfrm …

but出現以下問題(不能加入sa)...

kernel: 2.6.28.10

Openswan 2.4.12

| checking transid: 12 keylen: 16 auth: 1

| checking transid: 12 keylen: 16 auth: 2

"conn_psk" #2: ERROR: netlink response for Add SA esp.f44e8ed@172.21.33.70 included errno 93: Protocol not supported

003 "conn_psk" #2: ERROR: netlink response for Add SA esp.f44e8ed@172.21.33.70 included errno 93: Protocol not supported

| complete state transition with STF_INTERNAL_ERROR

032 "conn_psk" #2: STATE_QUICK_I1: internal error

| state transition function for STATE_QUICK_I1 had internal error

| next event EVENT_RETRANSMIT in 8 seconds for #2

pluto的程式在這裡加入sa (kernel_netlink.c) netlink_add_sa

kernel對應的應該是: (xfrm_user.c)xfrm_add_sa

但2.6應該是不用klips…

結論是…我少了一些module
insmod ./hmac.ko