diff options
Diffstat (limited to 'release/src/linux/linux/include/linux/netfilter_ipv4/ipchains_core.h')
| -rw-r--r-- | release/src/linux/linux/include/linux/netfilter_ipv4/ipchains_core.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/release/src/linux/linux/include/linux/netfilter_ipv4/ipchains_core.h b/release/src/linux/linux/include/linux/netfilter_ipv4/ipchains_core.h new file mode 100644 index 00000000..13546ff8 --- /dev/null +++ b/release/src/linux/linux/include/linux/netfilter_ipv4/ipchains_core.h @@ -0,0 +1,193 @@ +/* + * This code is heavily based on the code in ip_fw.h; see that file for + * copyrights and attributions. This code is basically GPL. + * + * 15-Feb-1997: Major changes to allow graphs for firewall rules. + * Paul Russell <Paul.Russell@rustcorp.com.au> and + * Michael Neuling <Michael.Neuling@rustcorp.com.au> + * 2-Nov-1997: Changed types to __u16, etc. + * Removed IP_FW_F_TCPACK & IP_FW_F_BIDIR. + * Added inverse flags field. + * Removed multiple port specs. + */ + +/* + * Format of an IP firewall descriptor + * + * src, dst, src_mask, dst_mask are always stored in network byte order. + * flags are stored in host byte order (of course). + * Port numbers are stored in HOST byte order. + */ + +#ifndef _IP_FWCHAINS_H +#define _IP_FWCHAINS_H + +#ifdef __KERNEL__ +#include <linux/icmp.h> +#include <linux/in.h> +#include <linux/ip.h> +#include <linux/tcp.h> +#include <linux/udp.h> +#endif /* __KERNEL__ */ +#define IP_FW_MAX_LABEL_LENGTH 8 +typedef char ip_chainlabel[IP_FW_MAX_LABEL_LENGTH+1]; + +struct ip_fw +{ + struct in_addr fw_src, fw_dst; /* Source and destination IP addr */ + struct in_addr fw_smsk, fw_dmsk; /* Mask for src and dest IP addr */ + __u32 fw_mark; /* ID to stamp on packet */ + __u16 fw_proto; /* Protocol, 0 = ANY */ + __u16 fw_flg; /* Flags word */ + __u16 fw_invflg; /* Inverse flags */ + __u16 fw_spts[2]; /* Source port range. */ + __u16 fw_dpts[2]; /* Destination port range. */ + __u16 fw_redirpt; /* Port to redirect to. */ + __u16 fw_outputsize; /* Max amount to output to + NETLINK */ + char fw_vianame[IFNAMSIZ]; /* name of interface "via" */ + __u8 fw_tosand, fw_tosxor; /* Revised packet priority */ +}; + +struct ip_fwuser +{ + struct ip_fw ipfw; + ip_chainlabel label; +}; + +/* Values for "fw_flg" field . */ +#define IP_FW_F_PRN 0x0001 /* Print packet if it matches */ +#define IP_FW_F_TCPSYN 0x0002 /* For tcp packets-check SYN only */ +#define IP_FW_F_FRAG 0x0004 /* Set if rule is a fragment rule */ +#define IP_FW_F_MARKABS 0x0008 /* Set the mark to fw_mark, not add. */ +#define IP_FW_F_WILDIF 0x0010 /* Need only match start of interface name. */ +#define IP_FW_F_NETLINK 0x0020 /* Redirect to netlink: 2.1.x only */ +#define IP_FW_F_MASK 0x003F /* All possible flag bits mask */ + +/* Values for "fw_invflg" field. */ +#define IP_FW_INV_SRCIP 0x0001 /* Invert the sense of fw_src. */ +#define IP_FW_INV_DSTIP 0x0002 /* Invert the sense of fw_dst. */ +#define IP_FW_INV_PROTO 0x0004 /* Invert the sense of fw_proto. */ +#define IP_FW_INV_SRCPT 0x0008 /* Invert the sense of source ports. */ +#define IP_FW_INV_DSTPT 0x0010 /* Invert the sense of destination ports. */ +#define IP_FW_INV_VIA 0x0020 /* Invert the sense of fw_vianame. */ +#define IP_FW_INV_SYN 0x0040 /* Invert the sense of IP_FW_F_TCPSYN. */ +#define IP_FW_INV_FRAG 0x0080 /* Invert the sense of IP_FW_F_FRAG. */ + +/* + * New IP firewall options for [gs]etsockopt at the RAW IP level. + * Unlike BSD Linux inherits IP options so you don't have to use + * a raw socket for this. Instead we check rights in the calls. */ + +#define IP_FW_BASE_CTL 64 /* base for firewall socket options */ + +#define IP_FW_APPEND (IP_FW_BASE_CTL) /* Takes ip_fwchange */ +#define IP_FW_REPLACE (IP_FW_BASE_CTL+1) /* Takes ip_fwnew */ +#define IP_FW_DELETE_NUM (IP_FW_BASE_CTL+2) /* Takes ip_fwdelnum */ +#define IP_FW_DELETE (IP_FW_BASE_CTL+3) /* Takes ip_fwchange */ +#define IP_FW_INSERT (IP_FW_BASE_CTL+4) /* Takes ip_fwnew */ +#define IP_FW_FLUSH (IP_FW_BASE_CTL+5) /* Takes ip_chainlabel */ +#define IP_FW_ZERO (IP_FW_BASE_CTL+6) /* Takes ip_chainlabel */ +#define IP_FW_CHECK (IP_FW_BASE_CTL+7) /* Takes ip_fwtest */ +#define IP_FW_MASQ_TIMEOUTS (IP_FW_BASE_CTL+8) /* Takes 3 ints */ +#define IP_FW_CREATECHAIN (IP_FW_BASE_CTL+9) /* Takes ip_chainlabel */ +#define IP_FW_DELETECHAIN (IP_FW_BASE_CTL+10) /* Takes ip_chainlabel */ +#define IP_FW_POLICY (IP_FW_BASE_CTL+11) /* Takes ip_fwpolicy */ +/* Masquerade control, only 1 optname */ + +#define IP_FW_MASQ_CTL (IP_FW_BASE_CTL+12) /* General ip_masq ctl */ + +/* Builtin chain labels */ +#define IP_FW_LABEL_FORWARD "forward" +#define IP_FW_LABEL_INPUT "input" +#define IP_FW_LABEL_OUTPUT "output" + +/* Special targets */ +#define IP_FW_LABEL_MASQUERADE "MASQ" +#define IP_FW_LABEL_REDIRECT "REDIRECT" +#define IP_FW_LABEL_ACCEPT "ACCEPT" +#define IP_FW_LABEL_BLOCK "DENY" +#define IP_FW_LABEL_REJECT "REJECT" +#define IP_FW_LABEL_RETURN "RETURN" +#define IP_FW_LABEL_QUEUE "QUEUE" + +/* Files in /proc/net */ +#define IP_FW_PROC_CHAINS "ip_fwchains" +#define IP_FW_PROC_CHAIN_NAMES "ip_fwnames" + + +struct ip_fwpkt +{ + struct iphdr fwp_iph; /* IP header */ + union { + struct tcphdr fwp_tcph; /* TCP header or */ + struct udphdr fwp_udph; /* UDP header */ + struct icmphdr fwp_icmph; /* ICMP header */ + } fwp_protoh; + struct in_addr fwp_via; /* interface address */ + char fwp_vianame[IFNAMSIZ]; /* interface name */ +}; + +/* The argument to IP_FW_DELETE and IP_FW_APPEND */ +struct ip_fwchange +{ + struct ip_fwuser fwc_rule; + ip_chainlabel fwc_label; +}; + +/* The argument to IP_FW_CHECK. */ +struct ip_fwtest +{ + struct ip_fwpkt fwt_packet; /* Packet to be tested */ + ip_chainlabel fwt_label; /* Block to start test in */ +}; + +/* The argument to IP_FW_DELETE_NUM */ +struct ip_fwdelnum +{ + __u32 fwd_rulenum; + ip_chainlabel fwd_label; +}; + +/* The argument to IP_FW_REPLACE and IP_FW_INSERT */ +struct ip_fwnew +{ + __u32 fwn_rulenum; + struct ip_fwuser fwn_rule; + ip_chainlabel fwn_label; +}; + +/* The argument to IP_FW_POLICY */ +struct ip_fwpolicy +{ + ip_chainlabel fwp_policy; + ip_chainlabel fwp_label; +}; +/* + * timeouts for ip masquerading + */ + +extern int ip_fw_masq_timeouts(void *, int); + + +/* + * Main firewall chains definitions and global var's definitions. + */ + +#ifdef __KERNEL__ + +#include <linux/config.h> +#include <linux/version.h> +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0) +#include <linux/init.h> +extern void ip_fw_init(void) __init; +#else /* 2.0.x */ +extern void ip_fw_init(void); +#endif /* 2.1.x */ +extern int ip_fw_ctl(int, void *, int); +#ifdef CONFIG_IP_MASQUERADE +extern int ip_masq_uctl(int, char *, int); +#endif +#endif /* KERNEL */ + +#endif /* _IP_FWCHAINS_H */ |