diff options
Diffstat (limited to 'net/ipv4/icmp.c')
| -rw-r--r-- | net/ipv4/icmp.c | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 1f0c7e0..ff670ca 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -69,7 +69,6 @@ #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/fcntl.h> -#include <linux/sysrq.h> #include <linux/socket.h> #include <linux/in.h> #include <linux/inet.h> @@ -706,8 +705,6 @@ static void icmp_unreach(struct sk_buff *skb) &iph->daddr); } else { info = ntohs(icmph->un.frag.mtu); - if (!info) - goto out; } break; case ICMP_SR_FAILED: @@ -777,30 +774,6 @@ static void icmp_redirect(struct sk_buff *skb) } /* - * 32bit and 64bit have different timestamp length, so we check for - * the cookie at offset 20 and verify it is repeated at offset 50 - */ -#define CO_POS0 20 -#define CO_POS1 50 -#define CO_SIZE sizeof(int) -#define ICMP_SYSRQ_SIZE 57 - -/* - * We got a ICMP_SYSRQ_SIZE sized ping request. Check for the cookie - * pattern and if it matches send the next byte as a trigger to sysrq. - */ -static void icmp_check_sysrq(struct net *net, struct sk_buff *skb) -{ - int cookie = htonl(net->ipv4.sysctl_icmp_echo_sysrq); - char *p = skb->data; - - if (!memcmp(&cookie, p + CO_POS0, CO_SIZE) && - !memcmp(&cookie, p + CO_POS1, CO_SIZE) && - p[CO_POS0 + CO_SIZE] == p[CO_POS1 + CO_SIZE]) - handle_sysrq(p[CO_POS0 + CO_SIZE]); -} - -/* * Handle ICMP_ECHO ("ping") requests. * * RFC 1122: 3.2.2.6 MUST have an echo server that answers ICMP echo @@ -827,11 +800,6 @@ static void icmp_echo(struct sk_buff *skb) icmp_param.data_len = skb->len; icmp_param.head_len = sizeof(struct icmphdr); icmp_reply(&icmp_param, skb); - - if (skb->len == ICMP_SYSRQ_SIZE && - net->ipv4.sysctl_icmp_echo_sysrq) { - icmp_check_sysrq(net, skb); - } } } |