It seems that the "kernel" should be open and free of policy, with
respect to the IPv4 TOS field.
http://www.dot-biz.com/IPv4/Tutorial/
These commands illustrate that not all TOS values can be easily set.
ping -Q 34 192.168.0.1
ping -Q 35 192.168.0.1
Below are the changes I made to make the kernel more open.
Jim Fleming
http://www.IPv8.info
IPv16....One Better !!
------------
/*
* Networking options
*/
#define CONFIG_PACKET 1
#undef CONFIG_PACKET_MMAP
#undef CONFIG_NETLINK
#define CONFIG_NETFILTER 1
#undef CONFIG_NETFILTER_DEBUG
#undef CONFIG_FILTER
#define CONFIG_UNIX 1
#define CONFIG_INET 1
#undef CONFIG_TUX
#define CONFIG_IPv8_TOS 1
#define CONFIG_IP_MULTICAST 1
#undef CONFIG_IP_ADVANCED_ROUTER
#undef CONFIG_IP_PNP
#undef CONFIG_NET_IPIP
#undef CONFIG_NET_IPGRE
#undef CONFIG_IP_MROUTE
#undef CONFIG_INET_ECN
#undef CONFIG_SYN_COOKIES
#ifndef _LINUX_IP_H
#define _LINUX_IP_H
#include <asm/byteorder.h>
/* SOL_IP socket options */
#ifdef CONFIG_IPv8_TOS
#define IPTOS_TOS_MASK 0xFF
#define IPTOS_TOS(tos) (tos)
#else
#define IPTOS_TOS_MASK 0x1E
#define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK)
#define IPTOS_LOWDELAY 0x10
#define IPTOS_THROUGHPUT 0x08
#define IPTOS_RELIABILITY 0x04
#define IPTOS_MINCOST 0x02
#define IPTOS_PREC_MASK 0xE0
#define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK)
#define IPTOS_PREC_NETCONTROL 0xe0
#define IPTOS_PREC_INTERNETCONTROL 0xc0
#define IPTOS_PREC_CRITIC_ECP 0xa0
#define IPTOS_PREC_FLASHOVERRIDE 0x80
#define IPTOS_PREC_FLASH 0x60
#define IPTOS_PREC_IMMEDIATE 0x40
#define IPTOS_PREC_PRIORITY 0x20
#define IPTOS_PREC_ROUTINE 0x00
#endif
Config.in:bool ' IP: IPv8 TOS' CONFIG_IPv8_TOS
---------------------------------------------------------------------
icmp.c:
#ifdef CONFIG_IPv8_TOS
tos = iph->tos;
#else
tos = icmp_pointers[type].error ?
((iph->tos & IPTOS_TOS_MASK) | IPTOS_PREC_INTERNETCONTROL) :
iph->tos;
#endif
---------------------------------------------------------------------
ip_sockglue.c:
case IP_TOS: /* This sets both TOS and Precedence */
#ifndef CONFIG_IPv8_TOS
/* Reject setting of unused bits */
#ifndef CONFIG_INET_ECN
if (val & ~(IPTOS_TOS_MASK|IPTOS_PREC_MASK))
goto e_inval;
#else
if (sk->type == SOCK_STREAM) {
val &= ~3;
val |= sk->protinfo.af_inet.tos & 3;
}
#endif
if (IPTOS_PREC(val) >= IPTOS_PREC_CRITIC_ECP &&
!capable(CAP_NET_ADMIN)) {
err = -EPERM;
break;
}
#endif
if (sk->protinfo.af_inet.tos != val) {
sk->protinfo.af_inet.tos=val;
sk->priority = rt_tos2priority(val);
sk_dst_reset(sk);
}
break;
case IP_TTL:
---------------------------------------------------------------------
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Nov 30 2001 - 21:00:33 EST