iptables: add connmark savedscp support
iptables: connmark - add savedscp option Naive user space front end to xt_connmark 'savedscp' option. e.g. iptables -A QOS_MARK_eth0 -t mangle -j CONNMARK --savedscp-mark 0xfc000000/0x01000000 Will save DSCP into the top 6 bits and OR 0x01 (ie set) the least significant bit of most significant byte. Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
This commit is contained in:
Kevin Darbyshire-Bryant
@@ -10,7 +10,7 @@ include $(INCLUDE_DIR)/kernel.mk
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PKG_NAME:=iptables
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PKG_NAME:=iptables
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PKG_VERSION:=1.8.3
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PKG_VERSION:=1.8.3
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PKG_RELEASE:=1
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PKG_RELEASE:=2
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PKG_SOURCE_URL:=https://netfilter.org/projects/iptables/files
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PKG_SOURCE_URL:=https://netfilter.org/projects/iptables/files
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PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
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PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
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@@ -0,0 +1,206 @@
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From 69b427fb5e1211c1110ce63be62b70504d04b0ff Mon Sep 17 00:00:00 2001
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From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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Date: Sat, 23 Mar 2019 10:21:03 +0000
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Subject: [PATCH] savedscp
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Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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---
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extensions/libxt_CONNMARK.c | 68 ++++++++++++++++++++++++++-
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include/linux/netfilter/xt_connmark.h | 3 +-
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2 files changed, 69 insertions(+), 2 deletions(-)
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--- a/extensions/libxt_CONNMARK.c
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+++ b/extensions/libxt_CONNMARK.c
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@@ -49,6 +49,7 @@ enum {
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O_CTMASK,
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O_NFMASK,
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O_MASK,
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+ O_SAVEDSCP_MARK,
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F_SET_MARK = 1 << O_SET_MARK,
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F_SAVE_MARK = 1 << O_SAVE_MARK,
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F_RESTORE_MARK = 1 << O_RESTORE_MARK,
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@@ -61,8 +62,10 @@ enum {
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F_CTMASK = 1 << O_CTMASK,
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F_NFMASK = 1 << O_NFMASK,
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F_MASK = 1 << O_MASK,
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+ F_SAVEDSCP_MARK = 1 << O_SAVEDSCP_MARK,
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F_OP_ANY = F_SET_MARK | F_SAVE_MARK | F_RESTORE_MARK |
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- F_AND_MARK | F_OR_MARK | F_XOR_MARK | F_SET_XMARK,
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+ F_AND_MARK | F_OR_MARK | F_XOR_MARK | F_SET_XMARK |
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+ F_SAVEDSCP_MARK,
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};
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static const char *const xt_connmark_shift_ops[] = {
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@@ -75,6 +78,7 @@ static void CONNMARK_help(void)
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printf(
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"CONNMARK target options:\n"
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" --set-mark value[/mask] Set conntrack mark value\n"
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+" --savedscp-mark dscpmask/statemask Save DSCP to conntrack mark value\n"
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" --save-mark [--mask mask] Save the packet nfmark in the connection\n"
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" --restore-mark [--mask mask] Restore saved nfmark value\n");
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}
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@@ -83,6 +87,8 @@ static void CONNMARK_help(void)
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static const struct xt_option_entry CONNMARK_opts[] = {
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{.name = "set-mark", .id = O_SET_MARK, .type = XTTYPE_MARKMASK32,
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.excl = F_OP_ANY},
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+ {.name = "savedscp-mark", .id = O_SAVEDSCP_MARK, .type = XTTYPE_MARKMASK32,
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+ .excl = F_OP_ANY},
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{.name = "save-mark", .id = O_SAVE_MARK, .type = XTTYPE_NONE,
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.excl = F_OP_ANY},
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{.name = "restore-mark", .id = O_RESTORE_MARK, .type = XTTYPE_NONE,
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@@ -98,6 +104,8 @@ static const struct xt_option_entry conn
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.excl = F_OP_ANY},
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{.name = "set-mark", .id = O_SET_MARK, .type = XTTYPE_MARKMASK32,
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.excl = F_OP_ANY},
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+ {.name = "savedscp-mark", .id = O_SAVEDSCP_MARK, .type = XTTYPE_MARKMASK32,
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+ .excl = F_OP_ANY},
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{.name = "and-mark", .id = O_AND_MARK, .type = XTTYPE_UINT32,
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.excl = F_OP_ANY},
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{.name = "or-mark", .id = O_OR_MARK, .type = XTTYPE_UINT32,
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@@ -124,6 +132,8 @@ static const struct xt_option_entry conn
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.excl = F_OP_ANY},
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{.name = "set-mark", .id = O_SET_MARK, .type = XTTYPE_MARKMASK32,
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.excl = F_OP_ANY},
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+ {.name = "savedscp-mark", .id = O_SAVEDSCP_MARK, .type = XTTYPE_MARKMASK32,
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+ .excl = F_OP_ANY},
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{.name = "and-mark", .id = O_AND_MARK, .type = XTTYPE_UINT32,
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.excl = F_OP_ANY},
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{.name = "or-mark", .id = O_OR_MARK, .type = XTTYPE_UINT32,
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@@ -158,6 +168,7 @@ static void connmark_tg_help(void)
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" --restore-mark [--ctmask mask] [--nfmask mask]\n"
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" Copy nfmark to ctmark using masks\n"
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" --set-mark value[/mask] Set conntrack mark value\n"
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+" --savedscp-mark value/mask Save DSCP to conntrack mark value\n"
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" --save-mark [--mask mask] Save the packet nfmark in the connection\n"
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" --restore-mark [--mask mask] Restore saved nfmark value\n"
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" --and-mark value Binary AND the ctmark with bits\n"
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@@ -210,6 +221,11 @@ static void CONNMARK_parse(struct xt_opt
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markinfo->mark = cb->val.mark;
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markinfo->mask = cb->val.mask;
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break;
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+ case O_SAVEDSCP_MARK:
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+ markinfo->mode = XT_CONNMARK_SAVEDSCP;
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+ markinfo->mark = cb->val.mark;
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+ markinfo->mask = cb->val.mask;
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+ break;
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case O_SAVE_MARK:
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markinfo->mode = XT_CONNMARK_SAVE;
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break;
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@@ -238,6 +254,19 @@ static void connmark_tg_parse(struct xt_
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info->ctmark = cb->val.mark;
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info->ctmask = cb->val.mark | cb->val.mask;
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break;
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+ case O_SAVEDSCP_MARK:
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+ info->mode = XT_CONNMARK_SAVEDSCP;
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+ info->ctmark = cb->val.mark;
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+ info->ctmask = cb->val.mask;
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+ info->nfmask = info->ctmark ? ffs(info->ctmark) - 1 : 0;
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+ /* need 6 contiguous bits */
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+ if ((0x3f & (info->ctmark >> info->nfmask)) != 0x3f)
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+ xtables_error(PARAMETER_PROBLEM,
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+ "CONNMARK savedscp: insufficient contiguous dscpmask bits");
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+ if (info->ctmark & info->ctmask)
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+ xtables_error(PARAMETER_PROBLEM,
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+ "CONNMARK savedscp: dscpmask/statemask bits overlap");
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+ break;
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case O_AND_MARK:
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info->mode = XT_CONNMARK_SET;
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info->ctmark = 0;
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@@ -283,6 +312,19 @@ static void connmark_tg_parse_v2(struct
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info->ctmark = cb->val.mark;
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info->ctmask = cb->val.mark | cb->val.mask;
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break;
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+ case O_SAVEDSCP_MARK:
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+ info->mode = XT_CONNMARK_SAVEDSCP;
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+ info->ctmark = cb->val.mark;
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+ info->ctmask = cb->val.mask;
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+ info->shift_bits = info->ctmark ? ffs(info->ctmark) - 1 : 0;
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+ /* need 6 contiguous bits */
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+ if ((0x3f & (info->ctmark >> info->shift_bits)) != 0x3f)
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+ xtables_error(PARAMETER_PROBLEM,
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+ "CONNMARK savedscp: insufficient contiguous dscpmask bits");
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+ if (info->ctmark & info->ctmask)
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+ xtables_error(PARAMETER_PROBLEM,
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+ "CONNMARK savedscp: dscpmask/statemask bits overlap");
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+ break;
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case O_AND_MARK:
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info->mode = XT_CONNMARK_SET;
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info->ctmark = 0;
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@@ -351,6 +393,11 @@ static void CONNMARK_print(const void *i
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print_mark(markinfo->mark);
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print_mask("/", markinfo->mask);
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break;
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+ case XT_CONNMARK_SAVEDSCP:
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+ printf(" CONNMARK savedscp ");
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+ print_mark(markinfo->mark);
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+ print_mask("/", markinfo->mask);
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+ break;
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case XT_CONNMARK_SAVE:
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printf(" CONNMARK save ");
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print_mask("mask ", markinfo->mask);
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@@ -386,6 +433,10 @@ connmark_tg_print(const void *ip, const
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printf(" CONNMARK xset 0x%x/0x%x",
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info->ctmark, info->ctmask);
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break;
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+ case XT_CONNMARK_SAVEDSCP:
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+ printf(" CONNMARK DSCP set 0x%x/0x%x",
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+ info->ctmark, info->ctmask);
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+ break;
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case XT_CONNMARK_SAVE:
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if (info->nfmask == UINT32_MAX && info->ctmask == UINT32_MAX)
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printf(" CONNMARK save");
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@@ -433,6 +484,10 @@ connmark_tg_print_v2(const void *ip, con
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printf(" CONNMARK xset 0x%x/0x%x",
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info->ctmark, info->ctmask);
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break;
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+ case XT_CONNMARK_SAVEDSCP:
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+ printf(" CONNMARK DSCP xset 0x%x/0x%x",
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+ info->ctmark, info->ctmask);
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+ break;
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case XT_CONNMARK_SAVE:
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if (info->nfmask == UINT32_MAX && info->ctmask == UINT32_MAX)
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printf(" CONNMARK save");
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@@ -474,6 +529,11 @@ static void CONNMARK_save(const void *ip
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print_mark(markinfo->mark);
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print_mask("/", markinfo->mask);
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break;
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+ case XT_CONNMARK_SAVEDSCP:
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+ printf(" --savedscp-mark ");
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+ print_mark(markinfo->mark);
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+ print_mask("/", markinfo->mask);
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+ break;
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case XT_CONNMARK_SAVE:
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printf(" --save-mark ");
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print_mask("--mask ", markinfo->mask);
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@@ -505,6 +565,9 @@ connmark_tg_save(const void *ip, const s
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case XT_CONNMARK_SET:
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printf(" --set-xmark 0x%x/0x%x", info->ctmark, info->ctmask);
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break;
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+ case XT_CONNMARK_SAVEDSCP:
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+ printf(" --savedscp-mark 0x%x/0x%x", info->ctmark, info->ctmask);
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+ break;
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case XT_CONNMARK_SAVE:
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printf(" --save-mark --nfmask 0x%x --ctmask 0x%x",
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info->nfmask, info->ctmask);
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@@ -529,6 +592,9 @@ connmark_tg_save_v2(const void *ip, cons
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case XT_CONNMARK_SET:
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printf(" --set-xmark 0x%x/0x%x", info->ctmark, info->ctmask);
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break;
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+ case XT_CONNMARK_SAVEDSCP:
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+ printf(" --savedscp-mark 0x%x/0x%x", info->ctmark, info->ctmask);
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+ break;
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case XT_CONNMARK_SAVE:
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printf(" --save-mark --nfmask 0x%x --ctmask 0x%x",
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info->nfmask, info->ctmask);
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--- a/include/linux/netfilter/xt_connmark.h
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+++ b/include/linux/netfilter/xt_connmark.h
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@@ -15,7 +15,8 @@
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enum {
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XT_CONNMARK_SET = 0,
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XT_CONNMARK_SAVE,
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- XT_CONNMARK_RESTORE
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+ XT_CONNMARK_RESTORE,
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+ XT_CONNMARK_SAVEDSCP
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};
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struct xt_connmark_tginfo1 {
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