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-rw-r--r--include/linux/tc_act/tc_pedit.h36
-rw-r--r--include/net/tc_act/tc_pedit.h14
-rw-r--r--net/sched/Kconfig7
-rw-r--r--net/sched/Makefile1
-rw-r--r--net/sched/pedit.c302
5 files changed, 360 insertions, 0 deletions
diff --git a/include/linux/tc_act/tc_pedit.h b/include/linux/tc_act/tc_pedit.h
new file mode 100644
index 000000000000..83e56e32e8e0
--- /dev/null
+++ b/include/linux/tc_act/tc_pedit.h
@@ -0,0 +1,36 @@
+#ifndef __LINUX_TC_PED_H
+#define __LINUX_TC_PED_H
+
+#include <linux/pkt_cls.h>
+
+#define TCA_ACT_PEDIT 7
+
+enum
+{
+ TCA_PEDIT_UNSPEC,
+ TCA_PEDIT_TM,
+ TCA_PEDIT_PARMS,
+ __TCA_PEDIT_MAX
+};
+#define TCA_PEDIT_MAX (__TCA_PEDIT_MAX - 1)
+
+struct tc_pedit_key
+{
+ __u32 mask; /* AND */
+ __u32 val; /*XOR */
+ __u32 off; /*offset */
+ __u32 at;
+ __u32 offmask;
+ __u32 shift;
+};
+
+struct tc_pedit_sel
+{
+ tc_gen;
+ unsigned char nkeys;
+ unsigned char flags;
+ struct tc_pedit_key keys[0];
+};
+#define tc_pedit tc_pedit_sel
+
+#endif
diff --git a/include/net/tc_act/tc_pedit.h b/include/net/tc_act/tc_pedit.h
new file mode 100644
index 000000000000..b1dbf0af7362
--- /dev/null
+++ b/include/net/tc_act/tc_pedit.h
@@ -0,0 +1,14 @@
+#ifndef __NET_TC_PED_H
+#define __NET_TC_PED_H
+
+#include <net/pkt_sched.h>
+
+struct tcf_pedit
+{
+ tca_gen(pedit);
+ unsigned char nkeys;
+ unsigned char flags;
+ struct tc_pedit_key keys[0];
+};
+
+#endif
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index 1302edeeb8c9..e9306fb27983 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -406,3 +406,10 @@ config NET_ACT_MIRRED
---help---
requires new iproute2
This allows packets to be mirrored or redirected to netdevices
+
+config NET_ACT_PEDIT
+ tristate "Generic Packet Editor Actions"
+ depends on NET_CLS_ACT
+ ---help---
+ requires new iproute2
+ This allows for packets to be generically edited
diff --git a/net/sched/Makefile b/net/sched/Makefile
index a2857685b3c1..f69bb707f4a0 100644
--- a/net/sched/Makefile
+++ b/net/sched/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_NET_ACT_POLICE) += police.o
obj-$(CONFIG_NET_CLS_POLICE) += police.o
obj-$(CONFIG_NET_ACT_GACT) += gact.o
obj-$(CONFIG_NET_ACT_MIRRED) += mirred.o
+obj-$(CONFIG_NET_ACT_PEDIT) += pedit.o
obj-$(CONFIG_NET_SCH_CBQ) += sch_cbq.o
obj-$(CONFIG_NET_SCH_HTB) += sch_htb.o
obj-$(CONFIG_NET_SCH_HPFQ) += sch_hpfq.o
diff --git a/net/sched/pedit.c b/net/sched/pedit.c
new file mode 100644
index 000000000000..7df7038b8880
--- /dev/null
+++ b/net/sched/pedit.c
@@ -0,0 +1,302 @@
+/*
+ * net/sched/pedit.c Generic packet editor
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Jamal Hadi Salim (2002-4)
+ */
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/in.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <net/sock.h>
+#include <net/pkt_sched.h>
+#include <linux/tc_act/tc_pedit.h>
+#include <net/tc_act/tc_pedit.h>
+
+
+#define PEDIT_DEB 1
+
+/* use generic hash table */
+#define MY_TAB_SIZE 16
+#define MY_TAB_MASK 15
+static u32 idx_gen;
+static struct tcf_pedit *tcf_pedit_ht[MY_TAB_SIZE];
+static rwlock_t pedit_lock = RW_LOCK_UNLOCKED;
+
+#define tcf_st tcf_pedit
+#define tc_st tc_pedit
+#define tcf_t_lock pedit_lock
+#define tcf_ht tcf_pedit_ht
+
+#define CONFIG_NET_ACT_INIT 1
+#include <net/pkt_act.h>
+
+
+int
+tcf_pedit_init(struct rtattr *rta, struct rtattr *est, struct tc_action *a,int ovr, int bind)
+{
+ struct rtattr *tb[TCA_PEDIT_MAX];
+ struct tc_pedit *parm;
+ int size = 0;
+ int ret = 0;
+ struct tcf_pedit *p = NULL;
+
+ if (rtattr_parse(tb, TCA_PEDIT_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta)) < 0)
+ return -1;
+
+ if (NULL == a || NULL == tb[TCA_PEDIT_PARMS - 1]) {
+ printk("BUG: tcf_pedit_init called with NULL params\n");
+ return -1;
+ }
+
+ parm = RTA_DATA(tb[TCA_PEDIT_PARMS - 1]);
+
+ p = tcf_hash_check(parm, a, ovr, bind);
+
+ if (NULL == p) { /* new */
+
+ if (!parm->nkeys)
+ return -1;
+
+ size = sizeof (*p)+ (parm->nkeys*sizeof(struct tc_pedit_key));
+
+ p = tcf_hash_create(parm,est,a,size,ovr,bind);
+
+ if (NULL == p)
+ return -1;
+ ret = 1;
+ goto override;
+ }
+
+ if (ovr) {
+override:
+ p->flags = parm->flags;
+ p->nkeys = parm->nkeys;
+ p->action = parm->action;
+ memcpy(p->keys,parm->keys,parm->nkeys*(sizeof(struct tc_pedit_key)));
+ }
+
+ return ret;
+}
+
+int
+tcf_pedit_cleanup(struct tc_action *a, int bind)
+{
+ struct tcf_pedit *p;
+ p = PRIV(a,pedit);
+ if (NULL != p)
+ return tcf_hash_release(p, bind);
+ return 0;
+}
+
+/*
+**
+*/
+int
+tcf_pedit(struct sk_buff **pskb, struct tc_action *a)
+{
+ struct tcf_pedit *p;
+ struct sk_buff *skb = *pskb;
+ int i, munged = 0;
+ u8 *pptr;
+
+ p = PRIV(a,pedit);
+
+ if (NULL == p) {
+ printk("BUG: tcf_pedit called with NULL params\n");
+ return -1; /* change to something symbolic */
+ }
+
+ if (!(skb->tc_verd & TC_OK2MUNGE)) {
+ /* should we set skb->cloned? */
+ if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {
+ return p->action;
+ }
+ }
+
+ pptr = skb->nh.raw;
+
+ spin_lock(&p->lock);
+
+ p->tm.lastuse = jiffies;
+
+ if (0 < p->nkeys) {
+ struct tc_pedit_key *tkey = p->keys;
+
+ for (i = p->nkeys; i > 0; i--, tkey++) {
+ u32 *ptr ;
+
+ int offset = tkey->off;
+ if (tkey->offmask) {
+ if (skb->len > tkey->at) {
+ char *j = pptr+tkey->at;
+ offset +=((*j&tkey->offmask)>>tkey->shift);
+ } else {
+ goto bad;
+ }
+ }
+
+ if (offset % 4) {
+ printk("offset must be on 32 bit boundaries\n");
+ goto bad;
+ }
+
+ if (skb->len < 0 || (offset > 0 && offset > skb->len)) {
+ printk("offset %d cant exceed pkt length %d\n",
+ offset, skb->len);
+ goto bad;
+ }
+
+
+ ptr = (u32 *)(pptr+offset);
+ /* just do it, baby */
+ *ptr = ((*ptr & tkey->mask) ^ tkey->val);
+ munged++;
+ }
+
+ if (munged)
+ skb->tc_verd = SET_TC_MUNGED(skb->tc_verd);
+ goto done;
+ } else {
+ printk("pedit BUG: index %d\n",p->index);
+ }
+
+bad:
+ p->stats.overlimits++;
+done:
+ p->stats.bytes += skb->len;
+ p->stats.packets++;
+ spin_unlock(&p->lock);
+ return p->action;
+}
+
+int
+tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a,int bind, int ref)
+{
+ unsigned char *b = skb->tail;
+ struct tc_pedit *opt;
+ struct tcf_pedit *p;
+ struct tcf_t t;
+ int s;
+
+
+ p = PRIV(a,pedit);
+
+ if (NULL == p) {
+ printk("BUG: tcf_pedit_dump called with NULL params\n");
+ goto rtattr_failure;
+ }
+
+ s = sizeof (*opt)+(p->nkeys*sizeof(struct tc_pedit_key));
+
+ /* netlink spinlocks held above us - must use ATOMIC
+ * */
+ opt = kmalloc(s, GFP_ATOMIC);
+ if (opt == NULL)
+ return -ENOBUFS;
+
+ memset(opt, 0, s);
+
+ memcpy(opt->keys,p->keys,p->nkeys*(sizeof(struct tc_pedit_key)));
+ opt->index = p->index;
+ opt->nkeys = p->nkeys;
+ opt->flags = p->flags;
+ opt->action = p->action;
+ opt->refcnt = p->refcnt - ref;
+ opt->bindcnt = p->bindcnt - bind;
+
+
+#ifdef PEDIT_DEB
+ {
+ /* Debug - get rid of later */
+ int i;
+ struct tc_pedit_key *key = opt->keys;
+
+ for (i=0; i<opt->nkeys; i++, key++) {
+ printk( "\n key #%d",i);
+ printk( " at %d: val %08x mask %08x",
+ (unsigned int)key->off,
+ (unsigned int)key->val,
+ (unsigned int)key->mask);
+ }
+ }
+#endif
+
+ RTA_PUT(skb, TCA_PEDIT_PARMS, s, opt);
+ t.install = jiffies - p->tm.install;
+ t.lastuse = jiffies - p->tm.lastuse;
+ t.expires = p->tm.expires;
+ RTA_PUT(skb, TCA_PEDIT_TM, sizeof (t), &t);
+ return skb->len;
+
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+int
+tcf_pedit_stats(struct sk_buff *skb, struct tc_action *a)
+{
+ struct tcf_pedit *p;
+ p = PRIV(a,pedit);
+ if (NULL != p)
+ return qdisc_copy_stats(skb, &p->stats, p->stats_lock);
+
+ return 1;
+}
+
+static
+struct tc_action_ops act_pedit_ops = {
+ .kind = "pedit",
+ .type = TCA_ACT_PEDIT,
+ .capab = TCA_CAP_NONE,
+ .owner = THIS_MODULE,
+ .act = tcf_pedit,
+ .get_stats = tcf_pedit_stats,
+ .dump = tcf_pedit_dump,
+ .cleanup = tcf_pedit_cleanup,
+ .lookup = tcf_hash_search,
+ .init = tcf_pedit_init,
+ .walk = tcf_generic_walker
+};
+
+MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
+MODULE_DESCRIPTION("Generic Packet Editor actions");
+MODULE_LICENSE("GPL");
+
+static int __init
+pedit_init_module(void)
+{
+ return tcf_register_action(&act_pedit_ops);
+}
+
+static void __exit
+pedit_cleanup_module(void)
+{
+ tcf_unregister_action(&act_pedit_ops);
+}
+
+module_init(pedit_init_module);
+module_exit(pedit_cleanup_module);
+
generated by cgit v1.2.3 (git 2.46.0) at 2026-01-25 17:35:54 +0000