[求助]如何改变route table

Allan.Yu

小弟进来用busybox作系统shell，
但单单route命令无法加入，
但系统设计中需要改变route table，
请问有没有其他改变route table的方法或工具，
或者有关相关busybox增加route命令经验的朋友谈谈看法

Allan.Yu

谢谢各位了

Tetris

busybox是什么？

Allan.Yu

一种轻量的shell工具集
提供几乎所有shell工具
只是都是简化版
所以轻量
但在嵌入式系统中非常流行

Tetris

linux下加路由是:
route add -net xxx.xxx.xxx.1 netmask 255.255.255.255 dev eth0
route add -net 123.100.0.0 netmask 255.255.0.0 gw xxx.xxx.xxx.1 dev eth0

Allan.Yu

我是想问问有没有人用程序的方法改过route table
或者其他非工具

Tetris

噢，这个问题啊。
strace一下route的运行，就可以看到它做了一些什么事了啊。可能是直接写/proc，也可能是用ioctl，不会很复杂。

Allan.Yu

有可能
但不会是proc
proc节点没有写操作

Tetris

1. 
   
2. execve("/sbin/route", ["route", "add", "-net", "111.111.0.0", "netmask", "255.255.0.0", "gw", "162.105.146.1", "dev", "eth1"], [/* 2
   
3. 7 vars */]) = 0
   
4. uname({sys="Linux", node="bigpc", ...}) = 0
   
5. brk(0)                                  = 0x80533c8
   
6. open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or directory)
   
7. open("/usr/local/lib/tls/i686/mmx/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
   
8. stat64("/usr/local/lib/tls/i686/mmx", 0xbfffa7b4) = -1 ENOENT (No such file or directory)
   
9. open("/usr/local/lib/tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
   
10. stat64("/usr/local/lib/tls/i686", 0xbfffa7b4) = -1 ENOENT (No such file or directory)
    
11. open("/usr/local/lib/tls/mmx/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
    
12. stat64("/usr/local/lib/tls/mmx", 0xbfffa7b4) = -1 ENOENT (No such file or directory)
    
13. open("/usr/local/lib/tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
    
14. stat64("/usr/local/lib/tls", 0xbfffa7b4) = -1 ENOENT (No such file or directory)
    
15. open("/usr/local/lib/i686/mmx/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
    
16. stat64("/usr/local/lib/i686/mmx", 0xbfffa7b4) = -1 ENOENT (No such file or directory)
    
17. open("/usr/local/lib/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
    
18. stat64("/usr/local/lib/i686", 0xbfffa7b4) = -1 ENOENT (No such file or directory)
    
19. open("/usr/local/lib/mmx/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
    
20. stat64("/usr/local/lib/mmx", 0xbfffa7b4) = -1 ENOENT (No such file or directory)
    
21. open("/usr/local/lib/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
    
22. stat64("/usr/local/lib", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
    
23. open("/etc/ld.so.cache", O_RDONLY)      = 3
    
24. fstat64(3, {st_mode=S_IFREG|0644, st_size=76185, ...}) = 0
    
25. old_mmap(NULL, 76185, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb75d8000
    
26. close(3)                                = 0
    
27. open("/lib/tls/libc.so.6", O_RDONLY)    = 3
    
28. read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000X\1\000"..., 512) = 512
    
29. fstat64(3, {st_mode=S_IFREG|0755, st_size=1563240, ...}) = 0
    
30. old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb75d7000
    
31. old_mmap(NULL, 1272460, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xb74a0000
    
32. old_mmap(0xb75d1000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x130000) = 0xb75d1000
    
33. old_mmap(0xb75d4000, 10892, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb75d4000
    
34. close(3)                                = 0
    
35. set_thread_area({entry_number:-1 -> 6, base_addr:0xb75d7760, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_page
    
36. s:1, seg_not_present:0, useable:1}) = 0
    
37. munmap(0xb75d8000, 76185)               = 0
    
38. open("/usr/lib/locale/locale-archive", O_RDONLY|O_LARGEFILE) = 3
    
39. fstat64(3, {st_mode=S_IFREG|0644, st_size=32148976, ...}) = 0
    
40. mmap2(NULL, 2097152, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb72a0000
    
41. close(3)                                = 0
    
42. brk(0)                                  = 0x80533c8
    
43. brk(0x80743c8)                          = 0x80743c8
    
44. brk(0)                                  = 0x80743c8
    
45. brk(0x8075000)                          = 0x8075000
    
46. open("/usr/share/locale/locale.alias", O_RDONLY) = 3
    
47. fstat64(3, {st_mode=S_IFREG|0644, st_size=2601, ...}) = 0
    
48. mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb729f000
    
49. read(3, "# Locale name alias data base.\n#"..., 4096) = 2601
    
50. read(3, "", 4096)                       = 0
    
51. close(3)                                = 0
    
52. munmap(0xb729f000, 4096)                = 0
    
53. open("/usr/lib/locale/en/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory)
    
54. socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
    
55. ioctl(3, 0x890b, 0xbfffae40)            = 0
    
56. close(3)                                = 0
    
57. exit_group(0)                           = ?
    
58.                                                                
    

复制代码

Allan.Yu

Tetris兄辛苦了
看到这个，我想起UNIX网络编程上的一些东西
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
ioctl(3, 0x890b, 0xbfffae40)            = 0
close(3)                    

我去试试，希望有作用