diff -u --recursive --new-file ipfwadm-2.3.0.orig/Makefile ipfwadm-2.3.0/Makefile --- ipfwadm-2.3.0.orig/Makefile Tue Jul 30 06:54:22 1996 +++ ipfwadm-2.3.0/Makefile Tue Apr 7 02:09:17 1998 @@ -36,7 +36,7 @@ CC = gcc COPTS = -O2 -CFLAGS = -Wall $(COPTS) +CFLAGS = -Wall $(COPTS) -I. SBIN = /sbin MANDIR = /usr/man INSTALL = install diff -u --recursive --new-file ipfwadm-2.3.0.orig/linux/ip_fw.h ipfwadm-2.3.0/linux/ip_fw.h --- ipfwadm-2.3.0.orig/linux/ip_fw.h Wed Dec 31 18:00:00 1969 +++ ipfwadm-2.3.0/linux/ip_fw.h Tue Apr 7 02:09:07 1998 @@ -0,0 +1,219 @@ +/* + * IP firewalling code. This is taken from 4.4BSD. Please note the + * copyright message below. As per the GPL it must be maintained + * and the licenses thus do not conflict. While this port is subject + * to the GPL I also place my modifications under the original + * license in recognition of the original copyright. + * + * Ported from BSD to Linux, + * Alan Cox 22/Nov/1994. + * Merged and included the FreeBSD-Current changes at Ugen's request + * (but hey it's a lot cleaner now). Ugen would prefer in some ways + * we waited for his final product but since Linux 1.2.0 is about to + * appear it's not practical - Read: It works, it's not clean but please + * don't consider it to be his standard of finished work. + * Alan. + * + * Fixes: + * Pauline Middelink : Added masquerading. + * Jos Vos : Separate input and output firewall + * chains, new "insert" and "append" + * commands to replace "add" commands, + * add ICMP header to struct ip_fwpkt. + * Jos Vos : Add support for matching device names. + * Willy Konynenberg : Add transparent proxying support. + * Jos Vos : Add options for input/output accounting. + * + * All the real work was done by ..... + */ + +/* + * Copyright (c) 1993 Daniel Boulet + * Copyright (c) 1994 Ugen J.S.Antsilevich + * + * Redistribution and use in source forms, with and without modification, + * are permitted provided that this entire comment appears intact. + * + * Redistribution in binary form may occur without any restrictions. + * Obviously, it would be nice if you gave credit where credit is due + * but requiring it would be too onerous. + * + * This software is provided ``AS IS'' without any warranties of any kind. + */ + +/* + * Format of an IP firewall descriptor + * + * src, dst, src_mask, dst_mask are always stored in network byte order. + * flags and num_*_ports are stored in host byte order (of course). + * Port numbers are stored in HOST byte order. + */ + +#ifndef _IP_FW_H +#define _IP_FW_H + +#include +#include +#include +#include +#include + +struct ip_fw +{ + struct ip_fw *fw_next; /* Next firewall on chain */ + 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 */ + struct in_addr fw_via; /* IP address of interface "via" */ + struct device *fw_viadev; /* device of interface "via" */ + unsigned short fw_flg; /* Flags word */ + unsigned short fw_nsp, fw_ndp; /* N'of src ports and # of dst ports */ + /* in ports array (dst ports follow */ + /* src ports; max of 10 ports in all; */ + /* count of 0 means match all ports) */ +#define IP_FW_MAX_PORTS 10 /* A reasonable maximum */ + unsigned short fw_pts[IP_FW_MAX_PORTS]; /* Array of port numbers to match */ + unsigned long fw_pcnt,fw_bcnt; /* Packet and byte counters */ + unsigned char fw_tosand, fw_tosxor; /* Revised packet priority */ + char fw_vianame[IFNAMSIZ]; /* name of interface "via" */ +}; + +/* + * Values for "flags" field . + */ + +#define IP_FW_F_ALL 0x0000 /* This is a universal packet firewall*/ +#define IP_FW_F_TCP 0x0001 /* This is a TCP packet firewall */ +#define IP_FW_F_UDP 0x0002 /* This is a UDP packet firewall */ +#define IP_FW_F_ICMP 0x0003 /* This is a ICMP packet firewall */ +#define IP_FW_F_KIND 0x0003 /* Mask to isolate firewall kind */ +#define IP_FW_F_ACCEPT 0x0004 /* This is an accept firewall (as * + * opposed to a deny firewall)* + * */ +#define IP_FW_F_SRNG 0x0008 /* The first two src ports are a min * + * and max range (stored in host byte * + * order). * + * */ +#define IP_FW_F_DRNG 0x0010 /* The first two dst ports are a min * + * and max range (stored in host byte * + * order). * + * (ports[0] <= port <= ports[1]) * + * */ +#define IP_FW_F_PRN 0x0020 /* In verbose mode print this firewall*/ +#define IP_FW_F_BIDIR 0x0040 /* For bidirectional firewalls */ +#define IP_FW_F_TCPSYN 0x0080 /* For tcp packets-check SYN only */ +#define IP_FW_F_ICMPRPL 0x0100 /* Send back icmp unreachable packet */ +#define IP_FW_F_MASQ 0x0200 /* Masquerading */ +#define IP_FW_F_TCPACK 0x0400 /* For tcp-packets match if ACK is set*/ +#define IP_FW_F_REDIR 0x0800 /* Redirect to local port fw_pts[n] */ +#define IP_FW_F_ACCTIN 0x1000 /* Account incoming packets only. */ +#define IP_FW_F_ACCTOUT 0x2000 /* Account outgoing packets only. */ + +#define IP_FW_F_MASK 0x3FFF /* All possible flag bits mask */ + +/* + * 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_COMMAND 0x00FF /* mask for command without chain */ +#define IP_FW_TYPE 0x0300 /* mask for type (chain) */ +#define IP_FW_SHIFT 8 /* shift count for type (chain) */ + +#define IP_FW_FWD 0 +#define IP_FW_IN 1 +#define IP_FW_OUT 2 +#define IP_FW_ACCT 3 +#define IP_FW_CHAINS 4 /* total number of ip_fw chains */ + +#define IP_FW_INSERT (IP_FW_BASE_CTL) +#define IP_FW_APPEND (IP_FW_BASE_CTL+1) +#define IP_FW_DELETE (IP_FW_BASE_CTL+2) +#define IP_FW_FLUSH (IP_FW_BASE_CTL+3) +#define IP_FW_ZERO (IP_FW_BASE_CTL+4) +#define IP_FW_POLICY (IP_FW_BASE_CTL+5) +#define IP_FW_CHECK (IP_FW_BASE_CTL+6) +#define IP_FW_MASQ_TIMEOUTS (IP_FW_BASE_CTL+7) + +#define IP_FW_INSERT_FWD (IP_FW_INSERT | (IP_FW_FWD << IP_FW_SHIFT)) +#define IP_FW_APPEND_FWD (IP_FW_APPEND | (IP_FW_FWD << IP_FW_SHIFT)) +#define IP_FW_DELETE_FWD (IP_FW_DELETE | (IP_FW_FWD << IP_FW_SHIFT)) +#define IP_FW_FLUSH_FWD (IP_FW_FLUSH | (IP_FW_FWD << IP_FW_SHIFT)) +#define IP_FW_ZERO_FWD (IP_FW_ZERO | (IP_FW_FWD << IP_FW_SHIFT)) +#define IP_FW_POLICY_FWD (IP_FW_POLICY | (IP_FW_FWD << IP_FW_SHIFT)) +#define IP_FW_CHECK_FWD (IP_FW_CHECK | (IP_FW_FWD << IP_FW_SHIFT)) + +#define IP_FW_INSERT_IN (IP_FW_INSERT | (IP_FW_IN << IP_FW_SHIFT)) +#define IP_FW_APPEND_IN (IP_FW_APPEND | (IP_FW_IN << IP_FW_SHIFT)) +#define IP_FW_DELETE_IN (IP_FW_DELETE | (IP_FW_IN << IP_FW_SHIFT)) +#define IP_FW_FLUSH_IN (IP_FW_FLUSH | (IP_FW_IN << IP_FW_SHIFT)) +#define IP_FW_ZERO_IN (IP_FW_ZERO | (IP_FW_IN << IP_FW_SHIFT)) +#define IP_FW_POLICY_IN (IP_FW_POLICY | (IP_FW_IN << IP_FW_SHIFT)) +#define IP_FW_CHECK_IN (IP_FW_CHECK | (IP_FW_IN << IP_FW_SHIFT)) + +#define IP_FW_INSERT_OUT (IP_FW_INSERT | (IP_FW_OUT << IP_FW_SHIFT)) +#define IP_FW_APPEND_OUT (IP_FW_APPEND | (IP_FW_OUT << IP_FW_SHIFT)) +#define IP_FW_DELETE_OUT (IP_FW_DELETE | (IP_FW_OUT << IP_FW_SHIFT)) +#define IP_FW_FLUSH_OUT (IP_FW_FLUSH | (IP_FW_OUT << IP_FW_SHIFT)) +#define IP_FW_ZERO_OUT (IP_FW_ZERO | (IP_FW_OUT << IP_FW_SHIFT)) +#define IP_FW_POLICY_OUT (IP_FW_POLICY | (IP_FW_OUT << IP_FW_SHIFT)) +#define IP_FW_CHECK_OUT (IP_FW_CHECK | (IP_FW_OUT << IP_FW_SHIFT)) + +#define IP_ACCT_INSERT (IP_FW_INSERT | (IP_FW_ACCT << IP_FW_SHIFT)) +#define IP_ACCT_APPEND (IP_FW_APPEND | (IP_FW_ACCT << IP_FW_SHIFT)) +#define IP_ACCT_DELETE (IP_FW_DELETE | (IP_FW_ACCT << IP_FW_SHIFT)) +#define IP_ACCT_FLUSH (IP_FW_FLUSH | (IP_FW_ACCT << IP_FW_SHIFT)) +#define IP_ACCT_ZERO (IP_FW_ZERO | (IP_FW_ACCT << IP_FW_SHIFT)) + +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 */ +}; + +/* + * timeouts for ip masquerading + */ + +struct ip_fw_masq; + +/* + * Main firewall chains definitions and global var's definitions. + */ + +#ifdef __KERNEL__ + +/* Modes used in the ip_fw_chk() routine. */ +#define IP_FW_MODE_FW 0x00 /* kernel firewall check */ +#define IP_FW_MODE_ACCT_IN 0x01 /* accounting (incoming) */ +#define IP_FW_MODE_ACCT_OUT 0x02 /* accounting (outgoing) */ +#define IP_FW_MODE_CHK 0x04 /* check requested by user */ + +#include +#ifdef CONFIG_IP_FIREWALL +extern struct ip_fw *ip_fw_in_chain; +extern struct ip_fw *ip_fw_out_chain; +extern struct ip_fw *ip_fw_fwd_chain; +extern int ip_fw_in_policy; +extern int ip_fw_out_policy; +extern int ip_fw_fwd_policy; +extern int ip_fw_ctl(int, void *, int); +#endif +#ifdef CONFIG_IP_ACCT +extern struct ip_fw *ip_acct_chain; +extern int ip_acct_ctl(int, void *, int); +#endif + +extern int ip_fw_chk(struct iphdr *, struct device *, __u16 *, struct ip_fw *, int, int); +extern void ip_fw_init(void); +#endif /* KERNEL */ + +#endif /* _IP_FW_H */