So, I'm confused as to what's going on. I've never hacked on the linux kernel, so maybe this is commonplace. If that's the case, sorry for the newb question.
$ git clone https://github.com/torvalds/linux.git
Then,
$ git status
.
# On branch master # Changes not staged for commit: # (use "git add <file>..." to update what will be committed) # (use "git checkout -- <file>..." to discard changes in working directory) # # modified: include/linux/netfilter/xt_CONNMARK.h # modified: include/linux/netfilter/xt_DSCP.h # modified: include/linux/netfilter/xt_MARK.h # modified: include/linux/netfilter/xt_RATEEST.h # modified: include/linux/netfilter/xt_TCPMSS.h # modified: include/linux/netfilter_ipv4/ipt_ECN.h # modified: include/linux/netfilter_ipv4/ipt_TTL.h # modified: include/linux/netfilter_ipv6/ip6t_HL.h # modified: net/ipv4/netfilter/ipt_ECN.c # modified: net/netfilter/xt_DSCP.c # modified: net/netfilter/xt_HL.c # modified: net/netfilter/xt_RATEEST.c # modified: net/netfilter/xt_TCPMSS.c # # Untracked files: # (use "git add <file>..." to include in what will be committed) # # samples/hidraw/
What's the deal?
EDIT : git diff output:
diff --git a/include/linux/netfilter/xt_CONNMARK.h b/include/linux/netfilter/xt_CONNMARK.h index 2f2e48e..efc17a8 100644 --- a/include/linux/netfilter/xt_CONNMARK.h +++ b/include/linux/netfilter/xt_CONNMARK.h @@ -1,6 +1,31 @@ -#ifndef _XT_CONNMARK_H_target -#define _XT_CONNMARK_H_target +#ifndef _XT_CONNMARK_H +#define _XT_CONNMARK_H -#include <linux/netfilter/xt_connmark.h> +#include <linux/types.h> -#endif /*_XT_CONNMARK_H_target*/ +/* Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com> + * by Henrik Nordstrom <[email protected]> + * + * 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. + */ + +enum { + XT_CONNMARK_SET = 0, + XT_CONNMARK_SAVE, + XT_CONNMARK_RESTORE +}; + +struct xt_connmark_tginfo1 { + __u32 ctmark, ctmask, nfmask; + __u8 mode; +}; + +struct xt_connmark_mtinfo1 { + __u32 mark, mask; + __u8 invert; +}; + +#endif /*_XT_CONNMARK_H*/ diff --git a/include/linux/netfilter/xt_DSCP.h b/include/linux/netfilter/xt_DSCP.h index 648e0b3..15f8932 100644 --- a/include/linux/netfilter/xt_DSCP.h +++ b/include/linux/netfilter/xt_DSCP.h @@ -1,26 +1,31 @@ -/* x_tables module for setting the IPv4/IPv6 DSCP field +/* x_tables module for matching the IPv4/IPv6 DSCP field * * (C) 2002 Harald Welte <[email protected]> - * based on ipt_FTOS.c (C) 2000 by Matthew G. Marsh <[email protected]> * This software is distributed under GNU GPL v2, 1991 * * See RFC2474 for a description of the DSCP field within the IP Header. * - * xt_DSCP.h,v 1.7 2002/03/14 12:03:13 laforge Exp + * xt_dscp.h,v 1.3 2002/08/05 19:00:21 laforge Exp */ -#ifndef _XT_DSCP_TARGET_H -#define _XT_DSCP_TARGET_H -#include <linux/netfilter/xt_dscp.h> +#ifndef _XT_DSCP_H +#define _XT_DSCP_H + #include <linux/types.h> -/* target info */ -struct xt_DSCP_info { +#define XT_DSCP_MASK 0xfc /* 11111100 */ +#define XT_DSCP_SHIFT 2 +#define XT_DSCP_MAX 0x3f /* 00111111 */ + +/* match info */ +struct xt_dscp_info { __u8 dscp; + __u8 invert; }; -struct xt_tos_target_info { - __u8 tos_value; +struct xt_tos_match_info { __u8 tos_mask; + __u8 tos_value; + __u8 invert; }; -#endif /* _XT_DSCP_TARGET_H */ +#endif /* _XT_DSCP_H */ diff --git a/include/linux/netfilter/xt_MARK.h b/include/linux/netfilter/xt_MARK.h index 41c456d..ecadc40 100644 --- a/include/linux/netfilter/xt_MARK.h +++ b/include/linux/netfilter/xt_MARK.h @@ -1,6 +1,15 @@ -#ifndef _XT_MARK_H_target -#define _XT_MARK_H_target +#ifndef _XT_MARK_H +#define _XT_MARK_H -#include <linux/netfilter/xt_mark.h> +#include <linux/types.h> -#endif /*_XT_MARK_H_target */ +struct xt_mark_tginfo2 { + __u32 mark, mask; +}; + +struct xt_mark_mtinfo1 { + __u32 mark, mask; + __u8 invert; +}; + +#endif /*_XT_MARK_H*/ diff --git a/include/linux/netfilter/xt_RATEEST.h b/include/linux/netfilter/xt_RATEEST.h index 6605e20..d40a619 100644 --- a/include/linux/netfilter/xt_RATEEST.h +++ b/include/linux/netfilter/xt_RATEEST.h @@ -1,15 +1,37 @@ -#ifndef _XT_RATEEST_TARGET_H -#define _XT_RATEEST_TARGET_H +#ifndef _XT_RATEEST_MATCH_H +#define _XT_RATEEST_MATCH_H #include <linux/types.h> -struct xt_rateest_target_info { - char name[IFNAMSIZ]; - __s8 interval; - __u8 ewma_log; +enum xt_rateest_match_flags { + XT_RATEEST_MATCH_INVERT = 1<<0, + XT_RATEEST_MATCH_ABS = 1<<1, + XT_RATEEST_MATCH_REL = 1<<2, + XT_RATEEST_MATCH_DELTA = 1<<3, + XT_RATEEST_MATCH_BPS = 1<<4, + XT_RATEEST_MATCH_PPS = 1<<5, +}; + +enum xt_rateest_match_mode { + XT_RATEEST_MATCH_NONE, + XT_RATEEST_MATCH_EQ, + XT_RATEEST_MATCH_LT, + XT_RATEEST_MATCH_GT, +}; + +struct xt_rateest_match_info { + char name1[IFNAMSIZ]; + char name2[IFNAMSIZ]; + __u16 flags; + __u16 mode; + __u32 bps1; + __u32 pps1; + __u32 bps2; + __u32 pps2; /* Used internally by the kernel */ - struct xt_rateest *est __attribute__((aligned(8))); + struct xt_rateest *est1 __attribute__((aligned(8))); + struct xt_rateest *est2 __attribute__((aligned(8))); }; -#endif /* _XT_RATEEST_TARGET_H */ +#endif /* _XT_RATEEST_MATCH_H */ diff --git a/include/linux/netfilter/xt_TCPMSS.h b/include/linux/netfilter/xt_TCPMSS.h index 9a6960a..fbac56b 100644 --- a/include/linux/netfilter/xt_TCPMSS.h +++ b/include/linux/netfilter/xt_TCPMSS.h @@ -1,12 +1,11 @@ -#ifndef _XT_TCPMSS_H -#define _XT_TCPMSS_H +#ifndef _XT_TCPMSS_MATCH_H +#define _XT_TCPMSS_MATCH_H #include <linux/types.h> -struct xt_tcpmss_info { - __u16 mss; +struct xt_tcpmss_match_info { + __u16 mss_min, mss_max; + __u8 invert; }; -#define XT_TCPMSS_CLAMP_PMTU 0xffff - -#endif /* _XT_TCPMSS_H */ +#endif /*_XT_TCPMSS_MATCH_H*/ diff --git a/include/linux/netfilter_ipv4/ipt_ECN.h b/include/linux/netfilter_ipv4/ipt_ECN.h index bb88d53..eabf95f 100644 --- a/include/linux/netfilter_ipv4/ipt_ECN.h +++ b/include/linux/netfilter_ipv4/ipt_ECN.h @@ -1,33 +1,35 @@ -/* Header file for iptables ipt_ECN target +/* iptables module for matching the ECN header in IPv4 and TCP header * - * (C) 2002 by Harald Welte <[email protected]> + * (C) 2002 Harald Welte <[email protected]> * * This software is distributed under GNU GPL v2, 1991 * - * ipt_ECN.h,v 1.3 2002/05/29 12:17:40 laforge Exp + * ipt_ecn.h,v 1.4 2002/08/05 19:39:00 laforge Exp */ -#ifndef _IPT_ECN_TARGET_H -#define _IPT_ECN_TARGET_H +#ifndef _IPT_ECN_H +#define _IPT_ECN_H #include <linux/types.h> -#include <linux/netfilter/xt_DSCP.h> +#include <linux/netfilter/xt_dscp.h> #define IPT_ECN_IP_MASK (~XT_DSCP_MASK) -#define IPT_ECN_OP_SET_IP 0x01 /* set ECN bits of IPv4 header */ -#define IPT_ECN_OP_SET_ECE 0x10 /* set ECE bit of TCP header */ -#define IPT_ECN_OP_SET_CWR 0x20 /* set CWR bit of TCP header */ +#define IPT_ECN_OP_MATCH_IP 0x01 +#define IPT_ECN_OP_MATCH_ECE 0x10 +#define IPT_ECN_OP_MATCH_CWR 0x20 -#define IPT_ECN_OP_MASK 0xce +#define IPT_ECN_OP_MATCH_MASK 0xce -struct ipt_ECN_info { - __u8 operation; /* bitset of operations */ - __u8 ip_ect; /* ECT codepoint of IPv4 header, pre-shifted */ +/* match info */ +struct ipt_ecn_info { + __u8 operation; + __u8 invert; + __u8 ip_ect; union { struct { - __u8 ece:1, cwr:1; /* TCP ECT bits */ + __u8 ect; } tcp; } proto; }; -#endif /* _IPT_ECN_TARGET_H */ +#endif /* _IPT_ECN_H */ diff --git a/include/linux/netfilter_ipv4/ipt_TTL.h b/include/linux/netfilter_ipv4/ipt_TTL.h index f6ac169..37bee44 100644 --- a/include/linux/netfilter_ipv4/ipt_TTL.h +++ b/include/linux/netfilter_ipv4/ipt_TTL.h @@ -1,5 +1,5 @@ -/* TTL modification module for IP tables - * (C) 2000 by Harald Welte <[email protected]> */ +/* IP tables module for matching the value of the TTL + * (C) 2000 by Harald Welte <[email protected]> */ #ifndef _IPT_TTL_H #define _IPT_TTL_H @@ -7,14 +7,14 @@ #include <linux/types.h> enum { - IPT_TTL_SET = 0, - IPT_TTL_INC, - IPT_TTL_DEC + IPT_TTL_EQ = 0, /* equals */ + IPT_TTL_NE, /* not equals */ + IPT_TTL_LT, /* less than */ + IPT_TTL_GT, /* greater than */ }; -#define IPT_TTL_MAXMODE IPT_TTL_DEC -struct ipt_TTL_info { +struct ipt_ttl_info { __u8 mode; __u8 ttl; }; diff --git a/include/linux/netfilter_ipv6/ip6t_HL.h b/include/linux/netfilter_ipv6/ip6t_HL.h index ebd8ead..6e76dbc 100644 --- a/include/linux/netfilter_ipv6/ip6t_HL.h +++ b/include/linux/netfilter_ipv6/ip6t_HL.h @@ -1,6 +1,6 @@ -/* Hop Limit modification module for ip6tables +/* ip6tables module for matching the Hop Limit value * Maciej Soltysiak <[email protected]> - * Based on HW's TTL module */ + * Based on HW's ttl module */ #ifndef _IP6T_HL_H #define _IP6T_HL_H @@ -8,14 +8,14 @@ #include <linux/types.h> enum { - IP6T_HL_SET = 0, - IP6T_HL_INC, - IP6T_HL_DEC + IP6T_HL_EQ = 0, /* equals */ + IP6T_HL_NE, /* not equals */ + IP6T_HL_LT, /* less than */ + IP6T_HL_GT, /* greater than */ }; -#define IP6T_HL_MAXMODE IP6T_HL_DEC -struct ip6t_HL_info { +struct ip6t_hl_info { __u8 mode; __u8 hop_limit; }; diff --git a/net/ipv4/netfilter/ipt_ECN.c b/net/ipv4/netfilter/ipt_ECN.c index 4bf3dc4..2b57e52 100644 --- a/net/ipv4/netfilter/ipt_ECN.c +++ b/net/ipv4/netfilter/ipt_ECN.c @@ -1,138 +1,127 @@ -/* iptables module for the IPv4 and TCP ECN bits, Version 1.5 +/* IP tables module for matching the value of the IPv4 and TCP ECN bits * - * (C) 2002 by Harald Welte <[email protected]> + * (C) 2002 by Harald Welte <[email protected]> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. -*/ + */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/in.h> -#include <linux/module.h> -#include <linux/skbuff.h> #include <linux/ip.h> #include <net/ip.h> +#include <linux/module.h> +#include <linux/skbuff.h> #include <linux/tcp.h> -#include <net/checksum.h> #include <linux/netfilter/x_tables.h> #include <linux/netfilter_ipv4/ip_tables.h> -#include <linux/netfilter_ipv4/ipt_ECN.h> +#include <linux/netfilter_ipv4/ipt_ecn.h> -MODULE_LICENSE("GPL"); MODULE_AUTHOR("Harald Welte <[email protected]>"); -MODULE_DESCRIPTION("Xtables: Explicit Congestion Notification (ECN) flag modification"); +MODULE_DESCRIPTION("Xtables: Explicit Congestion Notification (ECN) flag match for IPv4"); +MODULE_LICENSE("GPL"); -/* set ECT codepoint from IP header. - * return false if there was an error. */ -static inline bool -set_ect_ip(struct sk_buff *skb, const struct ipt_ECN_info *einfo) +static inline bool match_ip(const struct sk_buff *skb, + const struct ipt_ecn_info *einfo) { - struct iphdr *iph = ip_hdr(skb); - - if ((iph->tos & IPT_ECN_IP_MASK) != (einfo->ip_ect & IPT_ECN_IP_MASK)) { - __u8 oldtos; - if (!skb_make_writable(skb, sizeof(struct iphdr))) - return false; - iph = ip_hdr(skb); - oldtos = iph->tos; - iph->tos &= ~IPT_ECN_IP_MASK; - iph->tos |= (einfo->ip_ect & IPT_ECN_IP_MASK); - csum_replace2(&iph->check, htons(oldtos), htons(iph->tos)); - } - return true; + return ((ip_hdr(skb)->tos & IPT_ECN_IP_MASK) == einfo->ip_ect) ^ + !!(einfo->invert & IPT_ECN_OP_MATCH_IP); } -/* Return false if there was an error. */ -static inline bool -set_ect_tcp(struct sk_buff *skb, const struct ipt_ECN_info *einfo) +static inline bool match_tcp(const struct sk_buff *skb, + const struct ipt_ecn_info *einfo, + bool *hotdrop) { - struct tcphdr _tcph, *tcph; - __be16 oldval; - - /* Not enough header? */ - tcph = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_tcph), &_tcph); - if (!tcph) + struct tcphdr _tcph; + const struct tcphdr *th; + + /* In practice, TCP match does this, so can't fail. But let's + * be good citizens. + */ + th = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_tcph), &_tcph); + if (th == NULL) { + *hotdrop = false; return false; + } - if ((!(einfo->operation & IPT_ECN_OP_SET_ECE) || - tcph->ece == einfo->proto.tcp.ece) && - (!(einfo->operation & IPT_ECN_OP_SET_CWR) || - tcph->cwr == einfo->proto.tcp.cwr)) - return true; - - if (!skb_make_writable(skb, ip_hdrlen(skb) + sizeof(*tcph))) - return false; - tcph = (void *)ip_hdr(skb) + ip_hdrlen(skb);
...
(Truncated because it will exceed the stackoveflow post body limit otherwise.)
The git clone command creates a copy of an existing repository to a working directory on your local computer.
To clone git repository into a specific folder, you can use -C <path> parameter, e.g. Although it'll still create a whatever folder on top of it, so to clone the content of the repository into current directory, use the following syntax: cd /httpdocs git clone [email protected]:whatever .
Which OS are you using? This error is caused by your filesystem not being case sensitive, like the default on Mac OS X.
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