From: "Lev V. Vanyan" <remedy@mirotel.net>
To: linux-kernel@vger.kernel.org
Subject: net.ipv4.icmp_default_ttl
Date: Tue, 11 Jun 2002 17:00:44 +0300 [thread overview]
Message-ID: <02061117004401.01217@fortress.mirotel.net> (raw)
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forgot to send diffed sysctl.h changes. here is full diff text:
- --- linux/net/ipv4/sysctl_net_ipv4.c Wed Oct 31 01:08:12 2001
+++ linux-2.4.18/net/ipv4/sysctl_net_ipv4.c Mon Jun 10 21:51:08 2002
@@ -22,6 +22,7 @@
extern int sysctl_icmp_echo_ignore_all;
extern int sysctl_icmp_echo_ignore_broadcasts;
extern int sysctl_icmp_ignore_bogus_error_responses;
+extern int sysctl_icmp_default_ttl;
/* From ip_fragment.c */
extern int sysctl_ipfrag_low_thresh;
@@ -176,6 +177,9 @@
{NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
"icmp_ignore_bogus_error_responses",
&sysctl_icmp_ignore_bogus_error_responses, sizeof(int), 0644, NULL,
&proc_dointvec},
+ {NET_IPV4_ICMP_DEFAULT_TTL, "icmp_default_ttl",
+ &sysctl_icmp_default_ttl,sizeof(int), 0644,NULL,
+ &proc_dointvec},
{NET_IPV4_ROUTE, "route", NULL, 0, 0555, ipv4_route_table},
#ifdef CONFIG_IP_MULTICAST
{NET_IPV4_IGMP_MAX_MEMBERSHIPS, "igmp_max_memberships",
- --- linux/net/ipv4/ip_output.c Thu Oct 18 00:16:39 2001
+++ linux-2.4.18/net/ipv4/ip_output.c Tue Jun 11 15:58:07 2002
@@ -84,6 +84,9 @@
int sysctl_ip_dynaddr = 0;
int sysctl_ip_default_ttl = IPDEFTTL;
+#ifdef CONFIG_SYSCTL
+extern int sysctl_icmp_default_ttl;
+#endif
/* Generate a checksum for an outgoing IP datagram. */
__inline__ void ip_send_check(struct iphdr *iph)
@@ -572,10 +575,17 @@
*/
mf = htons(IP_MF);
}
- - if (rt->rt_type == RTN_MULTICAST)
- - iph->ttl = sk->protinfo.af_inet.mc_ttl;
- - else
- - iph->ttl = sk->protinfo.af_inet.ttl;
+#ifdef CONFIG_SYSCTL
+ if(sk->protocol != IPPROTO_ICMP) {
+#endif
+ if (rt->rt_type == RTN_MULTICAST)
+ iph->ttl = sk->protinfo.af_inet.mc_ttl;
+ else
+ iph->ttl = sk->protinfo.af_inet.ttl;
+#ifdef CONFIG_SYSCTL
+ }
+ else iph->ttl = sysctl_icmp_default_ttl;
+#endif
iph->protocol = sk->protocol;
iph->check = 0;
iph->saddr = rt->rt_src;
@@ -693,10 +703,19 @@
iph->tos=sk->protinfo.af_inet.tos;
iph->tot_len = htons(length);
iph->frag_off = df;
- - iph->ttl=sk->protinfo.af_inet.mc_ttl;
+ /* set TTL for ICMP packets */
+#ifdef CONFIG_SYSCTL
+ if(iph->protocol == IPPROTO_ICMP)
+ iph->ttl = sysctl_icmp_default_ttl;
+ else {
+#endif
+ if(rt->rt_type != RTN_MULTICAST)
+ iph->ttl = sk->protinfo.af_inet.ttl;
+ else iph->ttl = sk->protinfo.af_inet.mc_ttl;
+#ifdef CONFIG_SYSCTL
+ }
+#endif
ip_select_ident(iph, &rt->u.dst, sk);
- - if (rt->rt_type != RTN_MULTICAST)
- - iph->ttl=sk->protinfo.af_inet.ttl;
iph->protocol=sk->protocol;
iph->saddr=rt->rt_src;
iph->daddr=rt->rt_dst;
- --- linux/net/ipv4/icmp.c Mon Feb 25 21:38:14 2002
+++ linux-2.4.18/net/ipv4/icmp.c Tue Jun 11 15:36:36 2002
@@ -143,6 +143,9 @@
int sysctl_icmp_echo_ignore_all;
int sysctl_icmp_echo_ignore_broadcasts;
+/* Control max icmp ttl. */
+int sysctl_icmp_default_ttl = 255;
+
/* Control parameter - ignore bogus broadcast responses? */
int sysctl_icmp_ignore_bogus_error_responses;
- --- /usr/src/linux/include/linux/sysctl.h Mon Nov 26 15:29:17 2001
+++ /usr/src/linux-2.4.18/include/linux/sysctl.h Mon Jun 10 21:50:50 2002
@@ -289,7 +289,8 @@
NET_TCP_ADV_WIN_SCALE=87,
NET_IPV4_NONLOCAL_BIND=88,
NET_IPV4_ICMP_RATELIMIT=89,
- - NET_IPV4_ICMP_RATEMASK=90
+ NET_IPV4_ICMP_RATEMASK=90,
+ NET_IPV4_ICMP_DEFAULT_TTL=91
};
enum {
- --
Lev V. Vanyan Software Engineer
Mirotel ISP nic-hdl: VL1580-RIPE, LV2560-NIC
mailto: remedy@mirotel.net
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next reply other threads:[~2002-06-11 14:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-11 14:00 Lev V. Vanyan [this message]
2002-06-11 14:11 ` net sysctls questions Padraig Brady
2002-06-11 14:12 ` David S. Miller
2002-06-11 14:29 ` Padraig Brady
2002-06-11 22:23 ` [PATCH] ip-sysctl.txt Padraig Brady
2002-06-12 6:21 ` David S. Miller
2002-06-13 9:57 ` net sysctls questions Remedy
2002-06-13 9:59 ` David S. Miller
2002-06-13 10:18 ` Remedy
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