From 835110044bd970518e10b28348ce6619818ce363 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Sun, 18 May 2008 18:35:35 +0200 Subject: Remove obsolete patches and files and move ulogd to repository top-level directory --- kernel/ipt_ULOG.c | 370 ------------------------------------------------------ 1 file changed, 370 deletions(-) delete mode 100644 kernel/ipt_ULOG.c (limited to 'kernel/ipt_ULOG.c') diff --git a/kernel/ipt_ULOG.c b/kernel/ipt_ULOG.c deleted file mode 100644 index 90b5a8e..0000000 --- a/kernel/ipt_ULOG.c +++ /dev/null @@ -1,370 +0,0 @@ -/* - * netfilter module for userspace packet logging daemons - * - * (C) 2000-2002 by Harald Welte - * - * 2000/09/22 ulog-cprange feature added - * 2001/01/04 in-kernel queue as proposed by Sebastian Zander - * - * 2001/01/30 per-rule nlgroup conflicts with global queue. - * nlgroup now global (sysctl) - * 2001/04/19 ulog-queue reworked, now fixed buffer size specified at - * module loadtime -HW - * 2002/07/07 remove broken nflog_rcv() function -HW - * 2002/08/29 fix shifted/unshifted nlgroup bug -HW - * 2002/10/30 fix uninitialized mac_len field - - * - * Released under the terms of the GPL - * - * This module accepts two parameters: - * - * nlbufsiz: - * The parameter specifies how big the buffer for each netlink multicast - * group is. e.g. If you say nlbufsiz=8192, up to eight kb of packets will - * get accumulated in the kernel until they are sent to userspace. It is - * NOT possible to allocate more than 128kB, and it is strongly discouraged, - * because atomically allocating 128kB inside the network rx softirq is not - * reliable. Please also keep in mind that this buffer size is allocated for - * each nlgroup you are using, so the total kernel memory usage increases - * by that factor. - * - * flushtimeout: - * Specify, after how many clock ticks (intel: 100 per second) the queue - * should be flushed even if it is not full yet. - * - * $Id: ipt_ULOG.c,v 1.21 2002/08/29 10:54:34 laforge Exp $ - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Harald Welte "); -MODULE_DESCRIPTION("IP tables userspace logging module"); - -#define ULOG_NL_EVENT 111 /* Harald's favorite number */ -#define ULOG_MAXNLGROUPS 32 /* numer of nlgroups */ - -#if 0 -#define DEBUGP(format, args...) printk(__FILE__ ":" __FUNCTION__ ":" \ - format, ## args) -#else -#define DEBUGP(format, args...) -#endif - -#define PRINTR(format, args...) do { if (net_ratelimit()) printk(format, ## args); } while (0) - -static unsigned int nlbufsiz = 4096; -MODULE_PARM(nlbufsiz, "i"); -MODULE_PARM_DESC(nlbufsiz, "netlink buffer size"); - -static unsigned int flushtimeout = 10 * HZ; -MODULE_PARM(flushtimeout, "i"); -MODULE_PARM_DESC(flushtimeout, "buffer flush timeout"); - -/* global data structures */ - -typedef struct { - unsigned int qlen; /* number of nlmsgs' in the skb */ - struct nlmsghdr *lastnlh; /* netlink header of last msg in skb */ - struct sk_buff *skb; /* the pre-allocated skb */ - struct timer_list timer; /* the timer function */ -} ulog_buff_t; - -static ulog_buff_t ulog_buffers[ULOG_MAXNLGROUPS]; /* array of buffers */ - -static struct sock *nflognl; /* our socket */ -static size_t qlen; /* current length of multipart-nlmsg */ -DECLARE_LOCK(ulog_lock); /* spinlock */ - -/* send one ulog_buff_t to userspace */ -static void ulog_send(unsigned int nlgroupnum) -{ - ulog_buff_t *ub = &ulog_buffers[nlgroupnum]; - - if (timer_pending(&ub->timer)) { - DEBUGP("ipt_ULOG: ulog_send: timer was pending, deleting\n"); - del_timer(&ub->timer); - } - - /* last nlmsg needs NLMSG_DONE */ - if (ub->qlen > 1) - ub->lastnlh->nlmsg_type = NLMSG_DONE; - - NETLINK_CB(ub->skb).dst_groups = (1 << nlgroupnum); - DEBUGP("ipt_ULOG: throwing %d packets to netlink mask %u\n", - ub->qlen, nlgroup); - netlink_broadcast(nflognl, ub->skb, 0, (1 << nlgroupnum), GFP_ATOMIC); - - ub->qlen = 0; - ub->skb = NULL; - ub->lastnlh = NULL; - -} - - -/* timer function to flush queue in ULOG_FLUSH_INTERVAL time */ -static void ulog_timer(unsigned long data) -{ - DEBUGP("ipt_ULOG: timer function called, calling ulog_send\n"); - - /* lock to protect against somebody modifying our structure - * from ipt_ulog_target at the same time */ - LOCK_BH(&ulog_lock); - ulog_send(data); - UNLOCK_BH(&ulog_lock); -} - -struct sk_buff *ulog_alloc_skb(unsigned int size) -{ - struct sk_buff *skb; - - /* alloc skb which should be big enough for a whole - * multipart message. WARNING: has to be <= 131000 - * due to slab allocator restrictions */ - - skb = alloc_skb(nlbufsiz, GFP_ATOMIC); - if (!skb) { - PRINTR("ipt_ULOG: can't alloc whole buffer %ub!\n", - nlbufsiz); - - /* try to allocate only as much as we need for - * current packet */ - - skb = alloc_skb(size, GFP_ATOMIC); - if (!skb) - PRINTR("ipt_ULOG: can't even allocate %ub\n", size); - } - - return skb; -} - -static unsigned int ipt_ulog_target(struct sk_buff **pskb, - unsigned int hooknum, - const struct net_device *in, - const struct net_device *out, - const void *targinfo, void *userinfo) -{ - ulog_buff_t *ub; - ulog_packet_msg_t *pm; - size_t size, copy_len; - struct nlmsghdr *nlh; - struct ipt_ulog_info *loginfo = (struct ipt_ulog_info *) targinfo; - - /* ffs == find first bit set, necessary because userspace - * is already shifting groupnumber, but we need unshifted. - * ffs() returns [1..32], we need [0..31] */ - unsigned int groupnum = ffs(loginfo->nl_group) - 1; - - /* calculate the size of the skb needed */ - if ((loginfo->copy_range == 0) || - (loginfo->copy_range > (*pskb)->len)) { - copy_len = (*pskb)->len; - } else { - copy_len = loginfo->copy_range; - } - - size = NLMSG_SPACE(sizeof(*pm) + copy_len); - - ub = &ulog_buffers[groupnum]; - - LOCK_BH(&ulog_lock); - - if (!ub->skb) { - if (!(ub->skb = ulog_alloc_skb(size))) - goto alloc_failure; - } else if (ub->qlen >= loginfo->qthreshold || - size > skb_tailroom(ub->skb)) { - /* either the queue len is too high or we don't have - * enough room in nlskb left. send it to userspace. */ - - ulog_send(groupnum); - - if (!(ub->skb = ulog_alloc_skb(size))) - goto alloc_failure; - } - - DEBUGP("ipt_ULOG: qlen %d, qthreshold %d\n", ub->qlen, - loginfo->qthreshold); - - /* NLMSG_PUT contains a hidden goto nlmsg_failure !!! */ - nlh = NLMSG_PUT(ub->skb, 0, ub->qlen, ULOG_NL_EVENT, - size - sizeof(*nlh)); - ub->qlen++; - - pm = NLMSG_DATA(nlh); - - /* copy hook, prefix, timestamp, payload, etc. */ - pm->data_len = copy_len; - pm->timestamp_sec = (*pskb)->stamp.tv_sec; - pm->timestamp_usec = (*pskb)->stamp.tv_usec; - pm->mark = (*pskb)->nfmark; - pm->hook = hooknum; - if (loginfo->prefix[0] != '\0') - strncpy(pm->prefix, loginfo->prefix, sizeof(pm->prefix)); - else - *(pm->prefix) = '\0'; - - if (in && in->hard_header_len > 0 - && (*pskb)->mac.raw != (void *) (*pskb)->nh.iph - && in->hard_header_len <= ULOG_MAC_LEN) { - memcpy(pm->mac, (*pskb)->mac.raw, in->hard_header_len); - pm->mac_len = in->hard_header_len; - } else - pm->mac_len = 0; - - if (in) - strncpy(pm->indev_name, in->name, sizeof(pm->indev_name)); - else - pm->indev_name[0] = '\0'; - - if (out) - strncpy(pm->outdev_name, out->name, sizeof(pm->outdev_name)); - else - pm->outdev_name[0] = '\0'; - - if (copy_len) - memcpy(pm->payload, (*pskb)->data, copy_len); - - /* check if we are building multi-part messages */ - if (ub->qlen > 1) { - ub->lastnlh->nlmsg_flags |= NLM_F_MULTI; - } - - /* if threshold is reached, send message to userspace */ - if (qlen >= loginfo->qthreshold) { - if (loginfo->qthreshold > 1) - nlh->nlmsg_type = NLMSG_DONE; - } - - ub->lastnlh = nlh; - - /* if timer isn't already running, start it */ - if (!timer_pending(&ub->timer)) { - ub->timer.expires = jiffies + flushtimeout; - add_timer(&ub->timer); - } - - UNLOCK_BH(&ulog_lock); - - return IPT_CONTINUE; - - -nlmsg_failure: - PRINTR("ipt_ULOG: error during NLMSG_PUT\n"); - -alloc_failure: - PRINTR("ipt_ULOG: Error building netlink message\n"); - - UNLOCK_BH(&ulog_lock); - - return IPT_CONTINUE; -} - -static int ipt_ulog_checkentry(const char *tablename, - const struct ipt_entry *e, - void *targinfo, - unsigned int targinfosize, - unsigned int hookmask) -{ - struct ipt_ulog_info *loginfo = (struct ipt_ulog_info *) targinfo; - - if (targinfosize != IPT_ALIGN(sizeof(struct ipt_ulog_info))) { - DEBUGP("ipt_ULOG: targinfosize %u != 0\n", targinfosize); - return 0; - } - - if (loginfo->prefix[sizeof(loginfo->prefix) - 1] != '\0') { - DEBUGP("ipt_ULOG: prefix term %i\n", - loginfo->prefix[sizeof(loginfo->prefix) - 1]); - return 0; - } - - if (loginfo->qthreshold > ULOG_MAX_QLEN) { - DEBUGP("ipt_ULOG: queue threshold %i > MAX_QLEN\n", - loginfo->qthreshold); - return 0; - } - - return 1; -} - -static struct ipt_target ipt_ulog_reg = - { {NULL, NULL}, "ULOG", ipt_ulog_target, ipt_ulog_checkentry, NULL, -THIS_MODULE -}; - -static int __init init(void) -{ - int i; - - DEBUGP("ipt_ULOG: init module\n"); - - if (nlbufsiz >= 128*1024) { - printk("Netlink buffer has to be <= 128kB\n"); - return -EINVAL; - } - - /* initialize ulog_buffers */ - for (i = 0; i < ULOG_MAXNLGROUPS; i++) { - memset(&ulog_buffers[i], 0, sizeof(ulog_buff_t)); - init_timer(&ulog_buffers[i].timer); - ulog_buffers[i].timer.function = ulog_timer; - ulog_buffers[i].timer.data = i; - } - - nflognl = netlink_kernel_create(NETLINK_NFLOG, NULL); - if (!nflognl) - return -ENOMEM; - - if (ipt_register_target(&ipt_ulog_reg) != 0) { - sock_release(nflognl->socket); - return -EINVAL; - } - - return 0; -} - -static void __exit fini(void) -{ - ulog_buff_t *ub; - int i; - - DEBUGP("ipt_ULOG: cleanup_module\n"); - - ipt_unregister_target(&ipt_ulog_reg); - sock_release(nflognl->socket); - - /* remove pending timers and free allocated skb's */ - for (i = 0; i < ULOG_MAXNLGROUPS; i++) { - ub = &ulog_buffers[i]; - if (timer_pending(&ub->timer)) { - DEBUGP("timer was pending, deleting\n"); - del_timer(&ub->timer); - } - - if (ub->skb) { - kfree_skb(ub->skb); - ub->skb = NULL; - } - } - -} - -module_init(init); -module_exit(fini); -- cgit v1.2.3