Merge master.kernel.org:/pub/scm/linux/kernel/git/acme/net-2.6
This commit is contained in:
commit
76a081e5b3
|
@ -1,7 +1,6 @@
|
|||
DCCP protocol
|
||||
============
|
||||
|
||||
Last updated: 10 November 2005
|
||||
|
||||
Contents
|
||||
========
|
||||
|
@ -42,8 +41,11 @@ Socket options
|
|||
DCCP_SOCKOPT_PACKET_SIZE is used for CCID3 to set default packet size for
|
||||
calculations.
|
||||
|
||||
DCCP_SOCKOPT_SERVICE sets the service. This is compulsory as per the
|
||||
specification. If you don't set it you will get EPROTO.
|
||||
DCCP_SOCKOPT_SERVICE sets the service. The specification mandates use of
|
||||
service codes (RFC 4340, sec. 8.1.2); if this socket option is not set,
|
||||
the socket will fall back to 0 (which means that no meaningful service code
|
||||
is present). Connecting sockets set at most one service option; for
|
||||
listening sockets, multiple service codes can be specified.
|
||||
|
||||
Notes
|
||||
=====
|
||||
|
|
|
@ -169,6 +169,12 @@ enum {
|
|||
DCCPO_MAX_CCID_SPECIFIC = 255,
|
||||
};
|
||||
|
||||
/* DCCP CCIDS */
|
||||
enum {
|
||||
DCCPC_CCID2 = 2,
|
||||
DCCPC_CCID3 = 3,
|
||||
};
|
||||
|
||||
/* DCCP features */
|
||||
enum {
|
||||
DCCPF_RESERVED = 0,
|
||||
|
@ -320,7 +326,7 @@ static inline unsigned int dccp_hdr_len(const struct sk_buff *skb)
|
|||
/* initial values for each feature */
|
||||
#define DCCPF_INITIAL_SEQUENCE_WINDOW 100
|
||||
#define DCCPF_INITIAL_ACK_RATIO 2
|
||||
#define DCCPF_INITIAL_CCID 2
|
||||
#define DCCPF_INITIAL_CCID DCCPC_CCID2
|
||||
#define DCCPF_INITIAL_SEND_ACK_VECTOR 1
|
||||
/* FIXME: for now we're default to 1 but it should really be 0 */
|
||||
#define DCCPF_INITIAL_SEND_NDP_COUNT 1
|
||||
|
@ -404,6 +410,7 @@ struct dccp_service_list {
|
|||
};
|
||||
|
||||
#define DCCP_SERVICE_INVALID_VALUE htonl((__u32)-1)
|
||||
#define DCCP_SERVICE_CODE_IS_ABSENT 0
|
||||
|
||||
static inline int dccp_list_has_service(const struct dccp_service_list *sl,
|
||||
const __be32 service)
|
||||
|
@ -484,11 +491,6 @@ static inline struct dccp_minisock *dccp_msk(const struct sock *sk)
|
|||
return (struct dccp_minisock *)&dccp_sk(sk)->dccps_minisock;
|
||||
}
|
||||
|
||||
static inline int dccp_service_not_initialized(const struct sock *sk)
|
||||
{
|
||||
return dccp_sk(sk)->dccps_service == DCCP_SERVICE_INVALID_VALUE;
|
||||
}
|
||||
|
||||
static inline const char *dccp_role(const struct sock *sk)
|
||||
{
|
||||
switch (dccp_sk(sk)->dccps_role) {
|
||||
|
|
|
@ -40,6 +40,22 @@ config IP_DCCP_DEBUG
|
|||
|
||||
Just say N.
|
||||
|
||||
config NET_DCCPPROBE
|
||||
tristate "DCCP connection probing"
|
||||
depends on PROC_FS && KPROBES
|
||||
---help---
|
||||
This module allows for capturing the changes to DCCP connection
|
||||
state in response to incoming packets. It is used for debugging
|
||||
DCCP congestion avoidance modules. If you don't understand
|
||||
what was just said, you don't need it: say N.
|
||||
|
||||
Documentation on how to use the packet generator can be found
|
||||
at http://linux-net.osdl.org/index.php/DccpProbe
|
||||
|
||||
To compile this code as a module, choose M here: the
|
||||
module will be called dccp_probe.
|
||||
|
||||
|
||||
endmenu
|
||||
|
||||
endmenu
|
||||
|
|
|
@ -11,9 +11,11 @@ dccp_ipv4-y := ipv4.o
|
|||
dccp-$(CONFIG_IP_DCCP_ACKVEC) += ackvec.o
|
||||
|
||||
obj-$(CONFIG_INET_DCCP_DIAG) += dccp_diag.o
|
||||
obj-$(CONFIG_NET_DCCPPROBE) += dccp_probe.o
|
||||
|
||||
dccp-$(CONFIG_SYSCTL) += sysctl.o
|
||||
|
||||
dccp_diag-y := diag.o
|
||||
dccp_probe-y := probe.o
|
||||
|
||||
obj-y += ccids/
|
||||
|
|
|
@ -808,7 +808,7 @@ static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
|
|||
}
|
||||
|
||||
static struct ccid_operations ccid2 = {
|
||||
.ccid_id = 2,
|
||||
.ccid_id = DCCPC_CCID2,
|
||||
.ccid_name = "ccid2",
|
||||
.ccid_owner = THIS_MODULE,
|
||||
.ccid_hc_tx_obj_size = sizeof(struct ccid2_hc_tx_sock),
|
||||
|
|
|
@ -1240,7 +1240,7 @@ static int ccid3_hc_tx_getsockopt(struct sock *sk, const int optname, int len,
|
|||
}
|
||||
|
||||
static struct ccid_operations ccid3 = {
|
||||
.ccid_id = 3,
|
||||
.ccid_id = DCCPC_CCID3,
|
||||
.ccid_name = "ccid3",
|
||||
.ccid_owner = THIS_MODULE,
|
||||
.ccid_hc_tx_obj_size = sizeof(struct ccid3_hc_tx_sock),
|
||||
|
|
|
@ -56,9 +56,6 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
|
|||
|
||||
dp->dccps_role = DCCP_ROLE_CLIENT;
|
||||
|
||||
if (dccp_service_not_initialized(sk))
|
||||
return -EPROTO;
|
||||
|
||||
if (addr_len < sizeof(struct sockaddr_in))
|
||||
return -EINVAL;
|
||||
|
||||
|
|
198
net/dccp/probe.c
Normal file
198
net/dccp/probe.c
Normal file
|
@ -0,0 +1,198 @@
|
|||
/*
|
||||
* dccp_probe - Observe the DCCP flow with kprobes.
|
||||
*
|
||||
* The idea for this came from Werner Almesberger's umlsim
|
||||
* Copyright (C) 2004, Stephen Hemminger <shemminger@osdl.org>
|
||||
*
|
||||
* Modified for DCCP from Stephen Hemminger's code
|
||||
* Copyright (C) 2006, Ian McDonald <ian.mcdonald@jandi.co.nz>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/kprobes.h>
|
||||
#include <linux/socket.h>
|
||||
#include <linux/dccp.h>
|
||||
#include <linux/proc_fs.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/kfifo.h>
|
||||
#include <linux/vmalloc.h>
|
||||
|
||||
#include "dccp.h"
|
||||
#include "ccid.h"
|
||||
#include "ccids/ccid3.h"
|
||||
|
||||
static int port;
|
||||
|
||||
static int bufsize = 64 * 1024;
|
||||
|
||||
static const char procname[] = "dccpprobe";
|
||||
|
||||
struct {
|
||||
struct kfifo *fifo;
|
||||
spinlock_t lock;
|
||||
wait_queue_head_t wait;
|
||||
struct timeval tstart;
|
||||
} dccpw;
|
||||
|
||||
static void printl(const char *fmt, ...)
|
||||
{
|
||||
va_list args;
|
||||
int len;
|
||||
struct timeval now;
|
||||
char tbuf[256];
|
||||
|
||||
va_start(args, fmt);
|
||||
do_gettimeofday(&now);
|
||||
|
||||
now.tv_sec -= dccpw.tstart.tv_sec;
|
||||
now.tv_usec -= dccpw.tstart.tv_usec;
|
||||
if (now.tv_usec < 0) {
|
||||
--now.tv_sec;
|
||||
now.tv_usec += 1000000;
|
||||
}
|
||||
|
||||
len = sprintf(tbuf, "%lu.%06lu ",
|
||||
(unsigned long) now.tv_sec,
|
||||
(unsigned long) now.tv_usec);
|
||||
len += vscnprintf(tbuf+len, sizeof(tbuf)-len, fmt, args);
|
||||
va_end(args);
|
||||
|
||||
kfifo_put(dccpw.fifo, tbuf, len);
|
||||
wake_up(&dccpw.wait);
|
||||
}
|
||||
|
||||
static int jdccp_sendmsg(struct kiocb *iocb, struct sock *sk,
|
||||
struct msghdr *msg, size_t size)
|
||||
{
|
||||
const struct dccp_minisock *dmsk = dccp_msk(sk);
|
||||
const struct inet_sock *inet = inet_sk(sk);
|
||||
const struct ccid3_hc_tx_sock *hctx;
|
||||
|
||||
if (dmsk->dccpms_tx_ccid == DCCPC_CCID3)
|
||||
hctx = ccid3_hc_tx_sk(sk);
|
||||
else
|
||||
hctx = NULL;
|
||||
|
||||
if (port == 0 || ntohs(inet->dport) == port ||
|
||||
ntohs(inet->sport) == port) {
|
||||
if (hctx)
|
||||
printl("%d.%d.%d.%d:%u %d.%d.%d.%d:%u %d %d %d %d %d\n",
|
||||
NIPQUAD(inet->saddr), ntohs(inet->sport),
|
||||
NIPQUAD(inet->daddr), ntohs(inet->dport), size,
|
||||
hctx->ccid3hctx_s, hctx->ccid3hctx_rtt,
|
||||
hctx->ccid3hctx_p, hctx->ccid3hctx_t_ipi);
|
||||
else
|
||||
printl("%d.%d.%d.%d:%u %d.%d.%d.%d:%u %d\n",
|
||||
NIPQUAD(inet->saddr), ntohs(inet->sport),
|
||||
NIPQUAD(inet->daddr), ntohs(inet->dport), size);
|
||||
}
|
||||
|
||||
jprobe_return();
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct jprobe dccp_send_probe = {
|
||||
.kp = { .addr = (kprobe_opcode_t *)&dccp_sendmsg, },
|
||||
.entry = (kprobe_opcode_t *)&jdccp_sendmsg,
|
||||
};
|
||||
|
||||
static int dccpprobe_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
kfifo_reset(dccpw.fifo);
|
||||
do_gettimeofday(&dccpw.tstart);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t dccpprobe_read(struct file *file, char __user *buf,
|
||||
size_t len, loff_t *ppos)
|
||||
{
|
||||
int error = 0, cnt = 0;
|
||||
unsigned char *tbuf;
|
||||
|
||||
if (!buf || len < 0)
|
||||
return -EINVAL;
|
||||
|
||||
if (len == 0)
|
||||
return 0;
|
||||
|
||||
tbuf = vmalloc(len);
|
||||
if (!tbuf)
|
||||
return -ENOMEM;
|
||||
|
||||
error = wait_event_interruptible(dccpw.wait,
|
||||
__kfifo_len(dccpw.fifo) != 0);
|
||||
if (error)
|
||||
goto out_free;
|
||||
|
||||
cnt = kfifo_get(dccpw.fifo, tbuf, len);
|
||||
error = copy_to_user(buf, tbuf, cnt);
|
||||
|
||||
out_free:
|
||||
vfree(tbuf);
|
||||
|
||||
return error ? error : cnt;
|
||||
}
|
||||
|
||||
static struct file_operations dccpprobe_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = dccpprobe_open,
|
||||
.read = dccpprobe_read,
|
||||
};
|
||||
|
||||
static __init int dccpprobe_init(void)
|
||||
{
|
||||
int ret = -ENOMEM;
|
||||
|
||||
init_waitqueue_head(&dccpw.wait);
|
||||
spin_lock_init(&dccpw.lock);
|
||||
dccpw.fifo = kfifo_alloc(bufsize, GFP_KERNEL, &dccpw.lock);
|
||||
|
||||
if (!proc_net_fops_create(procname, S_IRUSR, &dccpprobe_fops))
|
||||
goto err0;
|
||||
|
||||
ret = register_jprobe(&dccp_send_probe);
|
||||
if (ret)
|
||||
goto err1;
|
||||
|
||||
pr_info("DCCP watch registered (port=%d)\n", port);
|
||||
return 0;
|
||||
err1:
|
||||
proc_net_remove(procname);
|
||||
err0:
|
||||
kfifo_free(dccpw.fifo);
|
||||
return ret;
|
||||
}
|
||||
module_init(dccpprobe_init);
|
||||
|
||||
static __exit void dccpprobe_exit(void)
|
||||
{
|
||||
kfifo_free(dccpw.fifo);
|
||||
proc_net_remove(procname);
|
||||
unregister_jprobe(&dccp_send_probe);
|
||||
|
||||
}
|
||||
module_exit(dccpprobe_exit);
|
||||
|
||||
MODULE_PARM_DESC(port, "Port to match (0=all)");
|
||||
module_param(port, int, 0);
|
||||
|
||||
MODULE_PARM_DESC(bufsize, "Log buffer size (default 64k)");
|
||||
module_param(bufsize, int, 0);
|
||||
|
||||
MODULE_AUTHOR("Ian McDonald <ian.mcdonald@jandi.co.nz>");
|
||||
MODULE_DESCRIPTION("DCCP snooper");
|
||||
MODULE_LICENSE("GPL");
|
|
@ -217,7 +217,7 @@ int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized)
|
|||
icsk->icsk_sync_mss = dccp_sync_mss;
|
||||
dp->dccps_mss_cache = 536;
|
||||
dp->dccps_role = DCCP_ROLE_UNDEFINED;
|
||||
dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;
|
||||
dp->dccps_service = DCCP_SERVICE_CODE_IS_ABSENT;
|
||||
dp->dccps_l_ack_ratio = dp->dccps_r_ack_ratio = 1;
|
||||
|
||||
return 0;
|
||||
|
@ -267,12 +267,6 @@ static inline int dccp_listen_start(struct sock *sk)
|
|||
struct dccp_sock *dp = dccp_sk(sk);
|
||||
|
||||
dp->dccps_role = DCCP_ROLE_LISTEN;
|
||||
/*
|
||||
* Apps need to use setsockopt(DCCP_SOCKOPT_SERVICE)
|
||||
* before calling listen()
|
||||
*/
|
||||
if (dccp_service_not_initialized(sk))
|
||||
return -EPROTO;
|
||||
return inet_csk_listen_start(sk, TCP_SYNQ_HSIZE);
|
||||
}
|
||||
|
||||
|
@ -540,9 +534,6 @@ static int dccp_getsockopt_service(struct sock *sk, int len,
|
|||
int err = -ENOENT, slen = 0, total_len = sizeof(u32);
|
||||
|
||||
lock_sock(sk);
|
||||
if (dccp_service_not_initialized(sk))
|
||||
goto out;
|
||||
|
||||
if ((sl = dp->dccps_service_list) != NULL) {
|
||||
slen = sl->dccpsl_nr * sizeof(u32);
|
||||
total_len += slen;
|
||||
|
|
Loading…
Reference in a new issue