📄 [转载] linux的tcp-ip协议栈阅读笔记(7) - china linux forum.htm
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<P class=post>发信人: AngelFalls (TRY IT), 信区: SysInternals<BR>标 题:
[转载] Linux的TCP/IP协议栈阅读笔记(7)<BR>发信站: 武汉白云黄鹤站 (Wed Oct 4 01:37:24
2000), 转信<BR><BR>【 以下文字转载自 Security 讨论区 】<BR>【 原文由 AngelFalls 所发表
】<BR>看看在net/packet/af_packet.c里面的packet_create函数,这个就是通过<BR>packet_proto_init加入的回调函数,假设定义了CONFIG_SOCK_PACKET,代码<BR>整理如下,这个函数是在用户创建链路层socket的时候被调用的:<BR>static
int packet_create(struct socket *sock, int protocol)<BR>{<BR>struct
sock *sk;<BR>int err;<BR><BR>if (!capable(CAP_NET_RAW))<BR>return
-EPERM;<BR><BR>if (sock->type != SOCK_DGRAM &&
sock->type != SOCK_RAW<BR>&& sock->type !=
SOCK_PACKET<BR>)<BR>return
-ESOCKTNOSUPPORT;<BR>//只有socket(AF_PACKET, [SOCK_DGRAM, SOCK_RAW],
<BR>//或者socket(AF_INET, SOCK_PACKET ,才能调用成功<BR><BR>sock->state =
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