Make header files conform to style(9).

Reviewed by (*): bde

(*) alias_local.h only got a cursory glance.

12 files changed, 622 insertions, 652 deletions

diff --git a/lib/libalias/alias.c b/lib/libalias/alias.c
index fd35221..bf5fd47 100644
--- a/lib/libalias/alias.c
+++ b/lib/libalias/alias.c
@@ -97,6 +97,8 @@
 #include <netinet/tcp.h>
 #include <netinet/udp.h>
 
+#include <stdio.h>
+
 #include "alias_local.h"
 #include "alias.h"
 
@@ -261,7 +263,7 @@ IcmpAliasIn1(struct ip *pip)
 /* Adjust ICMP checksum */
         accumulate  = ic->icmp_id;
         accumulate -= original_id;
-        ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+        ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /* Put original sequence number back in */
         ic->icmp_id = original_id;
@@ -340,7 +342,7 @@ IcmpAliasIn2(struct ip *pip)
             accumulate -= *sptr;
             accumulate += ud->uh_sport;
             accumulate -= original_port;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /* Un-alias address in IP header */
             DifferentialChecksum(&pip->ip_sum,
@@ -373,7 +375,7 @@ fragment contained in ICMP data section */
             accumulate -= *sptr;
             accumulate += ic2->icmp_id;
             accumulate -= original_id;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /* Un-alias address in IP header */
             DifferentialChecksum(&pip->ip_sum,
@@ -454,7 +456,7 @@ IcmpAliasOut1(struct ip *pip)
 /* Since data field is being modified, adjust ICMP checksum */
         accumulate  = ic->icmp_id;
         accumulate -= alias_id;
-        ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+        ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /* Alias sequence number */
         ic->icmp_id = alias_id;
@@ -534,7 +536,7 @@ IcmpAliasOut2(struct ip *pip)
             accumulate -= *sptr;
             accumulate += ud->uh_dport;
             accumulate -= alias_port;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /*
  * Alias address in IP header if it comes from the host
@@ -572,7 +574,7 @@ fragment contained in ICMP data section */
             accumulate -= *sptr;
             accumulate += ic2->icmp_id;
             accumulate -= alias_id;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /*
  * Alias address in IP header if it comes from the host
@@ -756,7 +758,7 @@ UdpAliasIn(struct ip *pip)
             sptr = (u_short *) &original_address;
             accumulate -= *sptr++;
             accumulate -= *sptr;
-            ADJUST_CHECKSUM(accumulate, ud->uh_sum)
+            ADJUST_CHECKSUM(accumulate, ud->uh_sum);
         }
 
 /* Restore original IP address */
@@ -827,7 +829,7 @@ UdpAliasOut(struct ip *pip)
             sptr = (u_short *) &alias_address;
             accumulate -= *sptr++;
             accumulate -= *sptr;
-            ADJUST_CHECKSUM(accumulate, ud->uh_sum)
+            ADJUST_CHECKSUM(accumulate, ud->uh_sum);
         }
 
 /* Put alias port in UDP header */
@@ -1084,7 +1086,7 @@ TcpAliasOut(struct ip *pip, int maxpacketsize)
             }
         }
 
-        ADJUST_CHECKSUM(accumulate, tc->th_sum)
+        ADJUST_CHECKSUM(accumulate, tc->th_sum);
 
 /* Change source address */
         sptr = (u_short *) &(pip->ip_src);
@@ -1095,7 +1097,7 @@ TcpAliasOut(struct ip *pip, int maxpacketsize)
         accumulate -= *sptr++;
         accumulate -= *sptr;
 
-        ADJUST_CHECKSUM(accumulate, pip->ip_sum)
+        ADJUST_CHECKSUM(accumulate, pip->ip_sum);
 
         return(PKT_ALIAS_OK);
     }
@@ -1475,11 +1477,11 @@ PacketUnaliasOut(char *ptr,           /* valid IP packet */
             if (pip->ip_p == IPPROTO_UDP) {
                 accumulate += ud->uh_sport;
                 accumulate -= original_port;
-                ADJUST_CHECKSUM(accumulate, ud->uh_sum)
+                ADJUST_CHECKSUM(accumulate, ud->uh_sum);
 	    } else { 
                 accumulate += tc->th_sport;
                 accumulate -= original_port;
-                ADJUST_CHECKSUM(accumulate, tc->th_sum)
+                ADJUST_CHECKSUM(accumulate, tc->th_sum);
 	    }
 
             /* Adjust IP checksum */
@@ -1516,7 +1518,7 @@ PacketUnaliasOut(char *ptr,           /* valid IP packet */
             accumulate -= *sptr;
             accumulate += ic->icmp_id;
             accumulate -= original_id;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
             /* Adjust IP checksum */
             DifferentialChecksum(&pip->ip_sum,
diff --git a/lib/libalias/alias.h b/lib/libalias/alias.h
index 7e18edb..607021f 100644
--- a/lib/libalias/alias.h
+++ b/lib/libalias/alias.h
@@ -1,169 +1,156 @@
-/*lint -save -library Flexelint comment for external headers */
+/* lint -save -library Flexelint comment for external headers */
+
+/*-
+ * Alias.h defines the outside world interfaces for the packet aliasing
+ * software.
+ * 
+ * This software is placed into the public domain with no restrictions on its
+ * distribution.
+ * 
+ * $FreeBSD$
+ */
 
-/*
-    Alias.h defines the outside world interfaces for the packet
-    aliasing software.
+#ifndef _ALIAS_H_
+#define	_ALIAS_H_
 
-    This software is placed into the public domain with no restrictions
-    on its distribution.
+/* The external interface to libalias, the packet aliasing engine. */
 
- $FreeBSD$
-*/
+/* Initialization and control functions. */
+void	 PacketAliasInit(void);
+void	 PacketAliasSetAddress(struct in_addr _addr);
+void	 PacketAliasSetFWBase(unsigned int _base, unsigned int _num);
+unsigned int
+	 PacketAliasSetMode(unsigned int _flags, unsigned int _mask);
+void	 PacketAliasUninit(void);
 
+/* Packet Handling functions. */
+int	 PacketAliasIn(char *_ptr, int _maxpacketsize);
+int	 PacketAliasOut(char *_ptr, int _maxpacketsize);
+int	 PacketUnaliasOut(char *_ptr, int _maxpacketsize);
 
-#ifndef _ALIAS_H_
-#define _ALIAS_H_
+/* Port and address redirection functions. */
 
-/* Alias link representative (incomplete struct) */
-struct alias_link;
+/*
+ * An anonymous structure, a pointer to which is returned from
+ * PacketAliasRedirectAddr(), PacketAliasRedirectPort() or
+ * PacketAliasRedirectProto(), passed to PacketAliasAddServer(),
+ * and freed by PacketAliasRedirectDelete().
+ */
+struct	alias_link;
+
+int	 PacketAliasAddServer(struct alias_link *_link,
+	    struct in_addr _addr, unsigned short _port);
+struct alias_link *
+	 PacketAliasRedirectAddr(struct in_addr _src_addr,
+	    struct in_addr _alias_addr);
+void	 PacketAliasRedirectDelete(struct alias_link *_link);
+struct alias_link *
+	 PacketAliasRedirectPort(struct in_addr _src_addr,
+	    unsigned short _src_port, struct in_addr _dst_addr,
+	    unsigned short _dst_port, struct in_addr _alias_addr,
+	    unsigned short _alias_port, unsigned char _proto);
+struct alias_link *
+	 PacketAliasRedirectProto(struct in_addr _src_addr,
+	    struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    unsigned char _proto);
+
+/* Fragment Handling functions. */
+void	 PacketAliasFragmentIn(char *_ptr, char *_ptr_fragment);
+char	*PacketAliasGetFragment(char *_ptr);
+int	 PacketAliasSaveFragment(char *_ptr);
+
+/* Miscellaneous functions. */
+int	 PacketAliasCheckNewLink(void);
+unsigned short
+	 PacketAliasInternetChecksum(unsigned short *_ptr, int _nbytes);
+void	 PacketAliasSetTarget(struct in_addr _target_addr);
+
+/* Transparent proxying routines. */
+int	 PacketAliasProxyRule(const char *_cmd);
+
+/* Mode flags, set using PacketAliasSetMode() */
 
-/* External interfaces (API) to packet aliasing engine */
+/*
+ * If PKT_ALIAS_LOG is set, a message will be printed to /var/log/alias.log
+ * every time a link is created or deleted.  This is useful for debugging.
+ */
+#define	PKT_ALIAS_LOG			0x01
 
-/* Initialization and Control */
-    extern void
-    PacketAliasInit(void);
+/*
+ * If PKT_ALIAS_DENY_INCOMING is set, then incoming connections (e.g. to ftp,
+ * telnet or web servers will be prevented by the aliasing mechanism.
+ */
+#define	PKT_ALIAS_DENY_INCOMING		0x02
 
-    extern void
-    PacketAliasUninit(void);
+/*
+ * If PKT_ALIAS_SAME_PORTS is set, packets will be attempted sent from the
+ * same port as they originated on.  This allows e.g. rsh to work *99% of the
+ * time*, but _not_ 100% (it will be slightly flakey instead of not working
+ * at all).  This mode bit is set by PacketAliasInit(), so it is a default
+ * mode of operation.
+ */
+#define	PKT_ALIAS_SAME_PORTS		0x04
 
-    extern void
-    PacketAliasSetAddress(struct in_addr);
+/*
+ * If PKT_ALIAS_USE_SOCKETS is set, then when partially specified links (e.g.
+ * destination port and/or address is zero), the packet aliasing engine will
+ * attempt to allocate a socket for the aliasing port it chooses.  This will
+ * avoid interference with the host machine.  Fully specified links do not
+ * require this.  This bit is set after a call to PacketAliasInit(), so it is
+ * a default mode of operation.
+ */
+#define	PKT_ALIAS_USE_SOCKETS		0x08
+
+/*-
+ * If PKT_ALIAS_UNREGISTERED_ONLY is set, then only packets with
+ * unregistered source addresses will be aliased.  Private
+ * addresses are those in the following ranges:
+ *
+ *		10.0.0.0     ->   10.255.255.255
+ *		172.16.0.0   ->   172.31.255.255
+ *		192.168.0.0  ->   192.168.255.255
+ */
+#define	PKT_ALIAS_UNREGISTERED_ONLY	0x10
 
-    extern unsigned int
-    PacketAliasSetMode(unsigned int, unsigned int);
+/*
+ * If PKT_ALIAS_RESET_ON_ADDR_CHANGE is set, then the table of dynamic
+ * aliasing links will be reset whenever PacketAliasSetAddress() changes the
+ * default aliasing address.  If the default aliasing address is left
+ * unchanged by this function call, then the table of dynamic aliasing links
+ * will be left intact.  This bit is set after a call to PacketAliasInit().
+ */
+#define	PKT_ALIAS_RESET_ON_ADDR_CHANGE	0x20
 
 #ifndef NO_FW_PUNCH
-    extern void
-    PacketAliasSetFWBase(unsigned int, unsigned int);
+/*
+ * If PKT_ALIAS_PUNCH_FW is set, active FTP and IRC DCC connections will
+ * create a 'hole' in the firewall to allow the transfers to work.  The
+ * ipfw rule number that the hole is created with is controlled by
+ * PacketAliasSetFWBase().  The hole will be attached to that
+ * particular alias_link, so when the link goes away the hole is deleted.
+ */
+#define	PKT_ALIAS_PUNCH_FW		0x100
 #endif
 
-/* Packet Handling */
-    extern int
-    PacketAliasIn(char *, int);
-
-    extern int
-    PacketAliasOut(char *, int);
-
-    extern int
-    PacketUnaliasOut(char *, int);
-
-/* Port and Address Redirection */
-    extern struct alias_link *
-    PacketAliasRedirectPort(struct in_addr, u_short, 
-                            struct in_addr, u_short,
-                            struct in_addr, u_short,
-                            u_char);
-
-    extern int
-    PacketAliasAddServer(struct alias_link *, struct in_addr, u_short);
-
-    extern struct alias_link *
-    PacketAliasRedirectProto(struct in_addr,
-                             struct in_addr,
-                             struct in_addr,
-                             u_char);
-
-    extern struct alias_link *
-    PacketAliasRedirectAddr(struct in_addr,
-                            struct in_addr);
-
-    extern void
-    PacketAliasRedirectDelete(struct alias_link *);
-
-/* Fragment Handling */
-    extern int
-    PacketAliasSaveFragment(char *);
-
-    extern char *
-    PacketAliasGetFragment(char *);
-
-    extern void 
-    PacketAliasFragmentIn(char *, char *);
-
-/* Miscellaneous Functions */
-    extern void
-    PacketAliasSetTarget(struct in_addr);
-
-    extern int
-    PacketAliasCheckNewLink(void);
-
-    extern u_short
-    PacketAliasInternetChecksum(u_short *, int);
-
-/* Transparent Proxying */
-    extern int
-    PacketAliasProxyRule(const char *);
-
-
-/********************** Mode flags ********************/
-/* Set these flags using PacketAliasSetMode() */
-
-/* If PKT_ALIAS_LOG is set, a message will be printed to
-	/var/log/alias.log every time a link is created or deleted.  This
-	is useful for debugging */
-#define PKT_ALIAS_LOG 0x01
-
-/* If PKT_ALIAS_DENY_INCOMING is set, then incoming connections (e.g.
-	to ftp, telnet or web servers will be prevented by the aliasing
-	mechanism.  */
-#define PKT_ALIAS_DENY_INCOMING 0x02
-
-/* If PKT_ALIAS_SAME_PORTS is set, packets will be attempted sent from
-	the same port as they originated on.  This allows e.g. rsh to work
-	*99% of the time*, but _not_ 100%.  (It will be slightly flakey
-	instead of not working at all.)  This mode bit is set by
-        PacketAliasInit(), so it is a default mode of operation. */
-#define PKT_ALIAS_SAME_PORTS 0x04
-
-/* If PKT_ALIAS_USE_SOCKETS is set, then when partially specified
-	links (e.g. destination port and/or address is zero), the packet
-	aliasing engine will attempt to allocate a socket for the aliasing
-	port it chooses.  This will avoid interference with the host
-	machine.  Fully specified links do not require this.  This bit
-        is set after a call to PacketAliasInit(), so it is a default
-        mode of operation. */
-#define PKT_ALIAS_USE_SOCKETS 0x08
-
-/* If PKT_ALIAS_UNREGISTERED_ONLY is set, then only packets with
-	unregistered source addresses will be aliased.  Private
-	addresses are those in the following ranges:
-		10.0.0.0     ->   10.255.255.255
-		172.16.0.0   ->   172.31.255.255
-		192.168.0.0  ->   192.168.255.255  */
-#define PKT_ALIAS_UNREGISTERED_ONLY 0x10
-
-/* If PKT_ALIAS_RESET_ON_ADDR_CHANGE is set, then the table of dynamic
-	aliasing links will be reset whenever PacketAliasSetAddress()
-        changes the default aliasing address.  If the default aliasing
-        address is left unchanged by this function call, then the
-        table of dynamic aliasing links will be left intact.  This
-        bit is set after a call to PacketAliasInit(). */
-#define PKT_ALIAS_RESET_ON_ADDR_CHANGE 0x20
-
-#ifndef NO_FW_PUNCH
-/* If PKT_ALIAS_PUNCH_FW is set, active FTP and IRC DCC connections
-   will create a 'hole' in the firewall to allow the transfers to
-   work.  Where (IPFW "line-numbers") the hole is created is
-   controlled by PacketAliasSetFWBase(base, size). The hole will be
-   attached to that particular alias_link, so when the link goes away
-   so do the hole.  */
-#define PKT_ALIAS_PUNCH_FW 0x100
-#endif
+/*
+ * If PKT_ALIAS_PROXY_ONLY is set, then NAT will be disabled and only
+ * transparent proxying is performed.
+ */
+#define	PKT_ALIAS_PROXY_ONLY		0x40
 
-/* If PKT_ALIAS_PROXY_ONLY is set, then NAT will be disabled and only
-      transparent proxying performed */
-#define PKT_ALIAS_PROXY_ONLY 0x40
+/*
+ * If PKT_ALIAS_REVERSE is set, the actions of PacketAliasIn() and
+ * PacketAliasOut() are reversed.
+ */
+#define	PKT_ALIAS_REVERSE		0x80
 
-/* If PKT_ALIAS_REVERSE is set, the actions of PacketAliasIn()
-      and PacketAliasOut() are reversed */
-#define PKT_ALIAS_REVERSE 0x80
+/* Function return codes. */
+#define	PKT_ALIAS_ERROR			-1
+#define	PKT_ALIAS_OK			1
+#define	PKT_ALIAS_IGNORED		2
+#define	PKT_ALIAS_UNRESOLVED_FRAGMENT	3
+#define	PKT_ALIAS_FOUND_HEADER_FRAGMENT	4
 
-/* Return Codes */
-#define PKT_ALIAS_ERROR -1
-#define PKT_ALIAS_OK 1
-#define PKT_ALIAS_IGNORED 2
-#define PKT_ALIAS_UNRESOLVED_FRAGMENT 3
-#define PKT_ALIAS_FOUND_HEADER_FRAGMENT 4
+#endif /* !_ALIAS_H_ */
 
-#endif
-/*lint -restore */
+/* lint -restore */
diff --git a/lib/libalias/alias_db.c b/lib/libalias/alias_db.c
index f926239..60d425f 100644
--- a/lib/libalias/alias_db.c
+++ b/lib/libalias/alias_db.c
@@ -2634,12 +2634,6 @@ do {                                                    \
 } /*lint -save -e717 */ while(0) /*lint -restore */
 #define fw_tstfield(field, num) ((field)[(num) - fireWallBaseNum])
 
-void
-PacketAliasSetFWBase(unsigned int base, unsigned int num) {
-    fireWallBaseNum = base;
-    fireWallNumNums = num;
-}
-
 static void
 InitPunchFW(void) {
     fireWallField = malloc(fireWallNumNums);
@@ -2784,3 +2778,11 @@ ClearAllFWHoles(void) {
     memset(fireWallField, 0, fireWallNumNums);
 }
 #endif
+
+void
+PacketAliasSetFWBase(unsigned int base, unsigned int num) {
+#ifndef NO_FW_PUNCH
+    fireWallBaseNum = base;
+    fireWallNumNums = num;
+#endif
+}
diff --git a/lib/libalias/alias_local.h b/lib/libalias/alias_local.h
index c4292e4..152406d 100644
--- a/lib/libalias/alias_local.h
+++ b/lib/libalias/alias_local.h
@@ -1,211 +1,203 @@
-/* -*- mode: c; tab-width: 3; c-basic-offset: 3; -*-
-    Alias_local.h contains the function prototypes for alias.c,
-    alias_db.c, alias_util.c and alias_ftp.c, alias_irc.c (as well
-    as any future add-ons).  It also includes macros, globals and
-    struct definitions shared by more than one alias*.c file.
-
-    This include file is intended to be used only within the aliasing
-    software.  Outside world interfaces are defined in alias.h
-
-    This software is placed into the public domain with no restrictions
-    on its distribution.
-
-    Initial version:  August, 1996  (cjm)    
-    
-     <updated several times by original author and Eivind Eklund>
-
-    $FreeBSD$
-*/
-#ifndef ALIAS_LOCAL_H
-#define ALIAS_LOCAL_H
-
-#ifndef NULL
-#define NULL 0
-#endif
-
 /*
-    Macros
+ * Alias_local.h contains the function prototypes for alias.c,
+ * alias_db.c, alias_util.c and alias_ftp.c, alias_irc.c (as well
+ * as any future add-ons).  It also includes macros, globals and
+ * struct definitions shared by more than one alias*.c file.
+ *
+ * This include file is intended to be used only within the aliasing
+ * software.  Outside world interfaces are defined in alias.h
+ *
+ * This software is placed into the public domain with no restrictions
+ * on its distribution.
+ *
+ * Initial version:  August, 1996  (cjm)    
+ *
+ * <updated several times by original author and Eivind Eklund>
+ *
+ * $FreeBSD$
  */
 
-/*
-   The following macro is used to update an
-   internet checksum.  "delta" is a 32-bit
-   accumulation of all the changes to the
-   checksum (adding in new 16-bit words and
-   subtracting out old words), and "cksum"
-   is the checksum value to be updated.
-*/
-#define ADJUST_CHECKSUM(acc, cksum) { \
-    acc += cksum; \
-    if (acc < 0) \
-    { \
-        acc = -acc; \
-        acc = (acc >> 16) + (acc & 0xffff); \
-        acc += acc >> 16; \
-        cksum = (u_short) ~acc; \
-    } \
-    else \
-    { \
-        acc = (acc >> 16) + (acc & 0xffff); \
-        acc += acc >> 16; \
-        cksum = (u_short) acc; \
-    } \
-}
+#ifndef _ALIAS_LOCAL_H_
+#define	_ALIAS_LOCAL_H_
 
+/* Macros */
 
 /*
-    Globals
-*/
+ * The following macro is used to update an
+ * internet checksum.  "delta" is a 32-bit
+ * accumulation of all the changes to the
+ * checksum (adding in new 16-bit words and
+ * subtracting out old words), and "cksum"
+ * is the checksum value to be updated.
+ */
+#define	ADJUST_CHECKSUM(acc, cksum) \
+	do { \
+		acc += cksum; \
+		if (acc < 0) { \
+			acc = -acc; \
+			acc = (acc >> 16) + (acc & 0xffff); \
+			acc += acc >> 16; \
+			cksum = (u_short) ~acc; \
+		} else { \
+			acc = (acc >> 16) + (acc & 0xffff); \
+			acc += acc >> 16; \
+			cksum = (u_short) acc; \
+		} \
+	} while (0)
+
+/* Globals */
 
 extern int packetAliasMode;
 
-
-/*
-    Structs
-*/
-
-struct alias_link;    /* Incomplete structure */
-
-
-/*
-    Prototypes
-*/
+/* Prototypes */
 
 /* General utilities */
-u_short IpChecksum(struct ip *);
-u_short TcpChecksum(struct ip *);
-void DifferentialChecksum(u_short *, u_short *, u_short *, int);
+u_short	 IpChecksum(struct ip *_pip);
+u_short	 TcpChecksum(struct ip *_pip);
+void	 DifferentialChecksum(u_short *_cksum, u_short *_new, u_short *_old,
+	    int _n);
 
 /* Internal data access */
 struct alias_link *
-FindIcmpIn(struct in_addr, struct in_addr, u_short, int);
-
+	 FindIcmpIn(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_short _id_alias, int _create);
 struct alias_link *
-FindIcmpOut(struct in_addr, struct in_addr, u_short, int);
-
+	 FindIcmpOut(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    u_short _id, int _create);
 struct alias_link *
-FindFragmentIn1(struct in_addr, struct in_addr, u_short);
-
+	 FindFragmentIn1(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_short _ip_id);
 struct alias_link *
-FindFragmentIn2(struct in_addr, struct in_addr, u_short);
-
+	 FindFragmentIn2(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_short _ip_id);
 struct alias_link *
-AddFragmentPtrLink(struct in_addr, u_short);
-
+	 AddFragmentPtrLink(struct in_addr _dst_addr, u_short _ip_id);
 struct alias_link *
-FindFragmentPtr(struct in_addr, u_short);
-
+	 FindFragmentPtr(struct in_addr _dst_addr, u_short _ip_id);
 struct alias_link *
-FindProtoIn(struct in_addr, struct in_addr, u_char);
-
+	 FindProtoIn(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_char _proto);
 struct alias_link *
-FindProtoOut(struct in_addr, struct in_addr, u_char);
-
+	 FindProtoOut(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    u_char _proto);
 struct alias_link *
-FindUdpTcpIn (struct in_addr, struct in_addr, u_short, u_short, u_char, int);
-
+	 FindUdpTcpIn(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_short _dst_port, u_short _alias_port, u_char _proto, int _create);
 struct alias_link *
-FindUdpTcpOut(struct in_addr, struct in_addr, u_short, u_short, u_char, int);
-
+	 FindUdpTcpOut(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    u_short _src_port, u_short _dst_port, u_char _proto, int _create);
 struct alias_link *
-AddPptp(struct in_addr, struct in_addr, struct in_addr, u_int16_t);
-
+	 AddPptp(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    struct in_addr _alias_addr, u_int16_t _src_call_id);
 struct alias_link *
-FindPptpOutByCallId(struct in_addr, struct in_addr, u_int16_t);
-
+	 FindPptpOutByCallId(struct in_addr _src_addr,
+	    struct in_addr _dst_addr, u_int16_t _src_call_id);
 struct alias_link *
-FindPptpInByCallId(struct in_addr, struct in_addr, u_int16_t);
-
+	 FindPptpInByCallId(struct in_addr _dst_addr,
+	    struct in_addr _alias_addr, u_int16_t _dst_call_id);
 struct alias_link *
-FindPptpOutByPeerCallId(struct in_addr, struct in_addr, u_int16_t);
-
+	 FindPptpOutByPeerCallId(struct in_addr _src_addr,
+	    struct in_addr _dst_addr, u_int16_t _dst_call_id);
 struct alias_link *
-FindPptpInByPeerCallId(struct in_addr, struct in_addr, u_int16_t);
-
+	 FindPptpInByPeerCallId(struct in_addr _dst_addr,
+	    struct in_addr _alias_addr, u_int16_t _alias_call_id);
 struct alias_link *
-FindRtspOut(struct in_addr, struct in_addr, u_short, u_short, u_char);
-
+	 FindRtspOut(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    u_short _src_port, u_short _alias_port, u_char _proto);
 struct in_addr
-FindOriginalAddress(struct in_addr);
-
+	 FindOriginalAddress(struct in_addr _alias_addr);
 struct in_addr
-FindAliasAddress(struct in_addr);
+	 FindAliasAddress(struct in_addr _original_addr);
 
 /* External data access/modification */
-int FindNewPortGroup(struct in_addr, struct in_addr,
-                     u_short, u_short, u_short, u_char, u_char);
-void GetFragmentAddr(struct alias_link *, struct in_addr *);
-void SetFragmentAddr(struct alias_link *, struct in_addr);
-void GetFragmentPtr(struct alias_link *, char **);
-void SetFragmentPtr(struct alias_link *, char *);
-void SetStateIn(struct alias_link *, int);
-void SetStateOut(struct alias_link *, int);
-int GetStateIn(struct alias_link *);
-int GetStateOut(struct alias_link *);
-struct in_addr GetOriginalAddress(struct alias_link *);
-struct in_addr GetDestAddress(struct alias_link *);
-struct in_addr GetAliasAddress(struct alias_link *);
-struct in_addr GetDefaultAliasAddress(void);
-void SetDefaultAliasAddress(struct in_addr);
-u_short GetOriginalPort(struct alias_link *);
-u_short GetAliasPort(struct alias_link *);
-struct in_addr GetProxyAddress(struct alias_link *);
-void SetProxyAddress(struct alias_link *, struct in_addr);
-u_short GetProxyPort(struct alias_link *);
-void SetProxyPort(struct alias_link *, u_short);
-void SetAckModified(struct alias_link *);
-int GetAckModified(struct alias_link *);
-int GetDeltaAckIn(struct ip *, struct alias_link *);
-int GetDeltaSeqOut(struct ip *, struct alias_link *);
-void AddSeq(struct ip *, struct alias_link *, int);
-void SetExpire(struct alias_link *, int);
-void ClearCheckNewLink(void);
-void SetLastLineCrlfTermed(struct alias_link *, int);
-int GetLastLineCrlfTermed(struct alias_link *);
-void SetDestCallId(struct alias_link *, u_int16_t);
+int	 FindNewPortGroup(struct in_addr _dst_addr, struct in_addr _alias_addr,
+                     u_short _src_port, u_short _dst_port, u_short _port_count,
+		     u_char _proto, u_char _align);
+void	 GetFragmentAddr(struct alias_link *_link, struct in_addr *_src_addr);
+void	 SetFragmentAddr(struct alias_link *_link, struct in_addr _src_addr);
+void	 GetFragmentPtr(struct alias_link *_link, char **_fptr);
+void	 SetFragmentPtr(struct alias_link *_link, char *fptr);
+void	 SetStateIn(struct alias_link *_link, int _state);
+void	 SetStateOut(struct alias_link *_link, int _state);
+int	 GetStateIn(struct alias_link *_link);
+int	 GetStateOut(struct alias_link *_link);
+struct in_addr
+	 GetOriginalAddress(struct alias_link *_link);
+struct in_addr
+	 GetDestAddress(struct alias_link *_link);
+struct in_addr
+	 GetAliasAddress(struct alias_link *_link);
+struct in_addr
+	 GetDefaultAliasAddress(void);
+void	 SetDefaultAliasAddress(struct in_addr _alias_addr);
+u_short	 GetOriginalPort(struct alias_link *_link);
+u_short	 GetAliasPort(struct alias_link *_link);
+struct in_addr
+	 GetProxyAddress(struct alias_link *_link);
+void	 SetProxyAddress(struct alias_link *_link, struct in_addr _addr);
+u_short	 GetProxyPort(struct alias_link *_link);
+void	 SetProxyPort(struct alias_link *_link, u_short _port);
+void	 SetAckModified(struct alias_link *_link);
+int	 GetAckModified(struct alias_link *_link);
+int	 GetDeltaAckIn(struct ip *_pip, struct alias_link *_link);
+int	 GetDeltaSeqOut(struct ip *_pip, struct alias_link *_link);
+void	 AddSeq(struct ip *_pip, struct alias_link *_link, int _delta);
+void	 SetExpire(struct alias_link *_link, int _expire);
+void	 ClearCheckNewLink(void);
+void	 SetLastLineCrlfTermed(struct alias_link *_link, int _yes);
+int	 GetLastLineCrlfTermed(struct alias_link *_link);
+void	 SetDestCallId(struct alias_link *_link, u_int16_t _cid);
 #ifndef NO_FW_PUNCH
-void PunchFWHole(struct alias_link *);
+void	 PunchFWHole(struct alias_link *_link);
 #endif
 
-
 /* Housekeeping function */
-void HouseKeeping(void);
+void	 HouseKeeping(void);
 
 /* Tcp specfic routines */
-/*lint -save -library Suppress flexelint warnings */
+/* lint -save -library Suppress flexelint warnings */
 
 /* FTP routines */
-void AliasHandleFtpOut(struct ip *, struct alias_link *, int);
+void	 AliasHandleFtpOut(struct ip *_pip, struct alias_link *_link,
+	    int _maxpacketsize);
 
 /* IRC routines */
-void AliasHandleIrcOut(struct ip *, struct alias_link *, int);
+void	 AliasHandleIrcOut(struct ip *_pip, struct alias_link *_link,
+	    int _maxsize);
 
 /* RTSP routines */
-void AliasHandleRtspOut(struct ip *, struct alias_link *, int);
+void	 AliasHandleRtspOut(struct ip *_pip, struct alias_link *_link,
+	    int _maxpacketsize);
 
 /* PPTP routines */
-void AliasHandlePptpOut(struct ip *, struct alias_link *);
-void AliasHandlePptpIn(struct ip *, struct alias_link *);
-int AliasHandlePptpGreOut(struct ip *);
-int AliasHandlePptpGreIn(struct ip *);
+void	 AliasHandlePptpOut(struct ip *_pip, struct alias_link *_link);
+void	 AliasHandlePptpIn(struct ip *_pip, struct alias_link *_link);
+int	 AliasHandlePptpGreOut(struct ip *_pip);
+int	 AliasHandlePptpGreIn(struct ip *_pip);
 
 /* NetBIOS routines */
-int AliasHandleUdpNbt(struct ip *, struct alias_link *, struct in_addr *, u_short);
-int AliasHandleUdpNbtNS(struct ip *, struct alias_link *, struct in_addr *, u_short *, struct in_addr *, u_short *);
+int	 AliasHandleUdpNbt(struct ip *_pip, struct alias_link *_link,
+	    struct in_addr *_alias_address, u_short _alias_port);
+int	 AliasHandleUdpNbtNS(struct ip *_pip, struct alias_link *_link,
+	    struct in_addr *_alias_address, u_short *_alias_port,
+	    struct in_addr *_original_address, u_short *_original_port);
 
 /* CUSeeMe routines */
-void AliasHandleCUSeeMeOut(struct ip *, struct alias_link *);
-void AliasHandleCUSeeMeIn(struct ip *, struct in_addr);
+void	 AliasHandleCUSeeMeOut(struct ip *_pip, struct alias_link *_link);
+void	 AliasHandleCUSeeMeIn(struct ip *_pip, struct in_addr _original_addr);
 
 /* Transparent proxy routines */
-int ProxyCheck(struct ip *, struct in_addr *, u_short *);
-void ProxyModify(struct alias_link *, struct ip *, int, int);
-
+int	 ProxyCheck(struct ip *_pip, struct in_addr *_proxy_server_addr,
+	    u_short *_proxy_server_port);
+void	 ProxyModify(struct alias_link *_link, struct ip *_pip,
+	    int _maxpacketsize, int _proxy_type);
 
 enum alias_tcp_state {
-    ALIAS_TCP_STATE_NOT_CONNECTED,
-    ALIAS_TCP_STATE_CONNECTED,
-    ALIAS_TCP_STATE_DISCONNECTED
+	ALIAS_TCP_STATE_NOT_CONNECTED,
+	ALIAS_TCP_STATE_CONNECTED,
+	ALIAS_TCP_STATE_DISCONNECTED
 };
+
 /*lint -restore */
-#endif /* defined(ALIAS_LOCAL_H) */
+
+#endif /* !_ALIAS_LOCAL_H_ */
diff --git a/lib/libalias/alias_nbt.c b/lib/libalias/alias_nbt.c
index 065fe37..74fe56e 100644
--- a/lib/libalias/alias_nbt.c
+++ b/lib/libalias/alias_nbt.c
@@ -241,7 +241,7 @@ int AliasHandleUdpNbt(
 		sptr = (u_short *) alias_address;
 		acc -= *sptr++;
 		acc -= *sptr;
-		ADJUST_CHECKSUM(acc, uh->uh_sum)
+		ADJUST_CHECKSUM(acc, uh->uh_sum);
 	}
     ndh->source_ip = *alias_address;
     ndh->source_port = alias_port;
@@ -358,7 +358,7 @@ AliasHandleResourceNB(
             	sptr = (u_short *) &(nbtarg->newaddr);
             	acc -= *sptr++;
             	acc -= *sptr;
-            	ADJUST_CHECKSUM(acc, *nbtarg->uh_sum)
+            	ADJUST_CHECKSUM(acc, *nbtarg->uh_sum);
 			}
 
 			nb->addr = nbtarg->newaddr;
@@ -426,7 +426,7 @@ AliasHandleResourceA(
             	sptr = (u_short *) &nbtarg->newaddr; /* New */
             	acc -= *sptr++;
             	acc -= *sptr;
-            	ADJUST_CHECKSUM(acc, *nbtarg->uh_sum)
+            	ADJUST_CHECKSUM(acc, *nbtarg->uh_sum);
 			}
 
 			a->addr = nbtarg->newaddr;
diff --git a/lib/libalias/alias_pptp.c b/lib/libalias/alias_pptp.c
index 373e33f..dbab7a9 100644
--- a/lib/libalias/alias_pptp.c
+++ b/lib/libalias/alias_pptp.c
@@ -71,6 +71,8 @@
 #include <netinet/ip.h>
 #include <netinet/tcp.h>
 
+#include <stdio.h>
+
 #include "alias_local.h"
 
 /*
diff --git a/sys/netinet/libalias/alias.c b/sys/netinet/libalias/alias.c
index fd35221..bf5fd47 100644
--- a/sys/netinet/libalias/alias.c
+++ b/sys/netinet/libalias/alias.c
@@ -97,6 +97,8 @@
 #include <netinet/tcp.h>
 #include <netinet/udp.h>
 
+#include <stdio.h>
+
 #include "alias_local.h"
 #include "alias.h"
 
@@ -261,7 +263,7 @@ IcmpAliasIn1(struct ip *pip)
 /* Adjust ICMP checksum */
         accumulate  = ic->icmp_id;
         accumulate -= original_id;
-        ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+        ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /* Put original sequence number back in */
         ic->icmp_id = original_id;
@@ -340,7 +342,7 @@ IcmpAliasIn2(struct ip *pip)
             accumulate -= *sptr;
             accumulate += ud->uh_sport;
             accumulate -= original_port;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /* Un-alias address in IP header */
             DifferentialChecksum(&pip->ip_sum,
@@ -373,7 +375,7 @@ fragment contained in ICMP data section */
             accumulate -= *sptr;
             accumulate += ic2->icmp_id;
             accumulate -= original_id;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /* Un-alias address in IP header */
             DifferentialChecksum(&pip->ip_sum,
@@ -454,7 +456,7 @@ IcmpAliasOut1(struct ip *pip)
 /* Since data field is being modified, adjust ICMP checksum */
         accumulate  = ic->icmp_id;
         accumulate -= alias_id;
-        ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+        ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /* Alias sequence number */
         ic->icmp_id = alias_id;
@@ -534,7 +536,7 @@ IcmpAliasOut2(struct ip *pip)
             accumulate -= *sptr;
             accumulate += ud->uh_dport;
             accumulate -= alias_port;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /*
  * Alias address in IP header if it comes from the host
@@ -572,7 +574,7 @@ fragment contained in ICMP data section */
             accumulate -= *sptr;
             accumulate += ic2->icmp_id;
             accumulate -= alias_id;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
 /*
  * Alias address in IP header if it comes from the host
@@ -756,7 +758,7 @@ UdpAliasIn(struct ip *pip)
             sptr = (u_short *) &original_address;
             accumulate -= *sptr++;
             accumulate -= *sptr;
-            ADJUST_CHECKSUM(accumulate, ud->uh_sum)
+            ADJUST_CHECKSUM(accumulate, ud->uh_sum);
         }
 
 /* Restore original IP address */
@@ -827,7 +829,7 @@ UdpAliasOut(struct ip *pip)
             sptr = (u_short *) &alias_address;
             accumulate -= *sptr++;
             accumulate -= *sptr;
-            ADJUST_CHECKSUM(accumulate, ud->uh_sum)
+            ADJUST_CHECKSUM(accumulate, ud->uh_sum);
         }
 
 /* Put alias port in UDP header */
@@ -1084,7 +1086,7 @@ TcpAliasOut(struct ip *pip, int maxpacketsize)
             }
         }
 
-        ADJUST_CHECKSUM(accumulate, tc->th_sum)
+        ADJUST_CHECKSUM(accumulate, tc->th_sum);
 
 /* Change source address */
         sptr = (u_short *) &(pip->ip_src);
@@ -1095,7 +1097,7 @@ TcpAliasOut(struct ip *pip, int maxpacketsize)
         accumulate -= *sptr++;
         accumulate -= *sptr;
 
-        ADJUST_CHECKSUM(accumulate, pip->ip_sum)
+        ADJUST_CHECKSUM(accumulate, pip->ip_sum);
 
         return(PKT_ALIAS_OK);
     }
@@ -1475,11 +1477,11 @@ PacketUnaliasOut(char *ptr,           /* valid IP packet */
             if (pip->ip_p == IPPROTO_UDP) {
                 accumulate += ud->uh_sport;
                 accumulate -= original_port;
-                ADJUST_CHECKSUM(accumulate, ud->uh_sum)
+                ADJUST_CHECKSUM(accumulate, ud->uh_sum);
 	    } else { 
                 accumulate += tc->th_sport;
                 accumulate -= original_port;
-                ADJUST_CHECKSUM(accumulate, tc->th_sum)
+                ADJUST_CHECKSUM(accumulate, tc->th_sum);
 	    }
 
             /* Adjust IP checksum */
@@ -1516,7 +1518,7 @@ PacketUnaliasOut(char *ptr,           /* valid IP packet */
             accumulate -= *sptr;
             accumulate += ic->icmp_id;
             accumulate -= original_id;
-            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum)
+            ADJUST_CHECKSUM(accumulate, ic->icmp_cksum);
 
             /* Adjust IP checksum */
             DifferentialChecksum(&pip->ip_sum,
diff --git a/sys/netinet/libalias/alias.h b/sys/netinet/libalias/alias.h
index 7e18edb..607021f 100644
--- a/sys/netinet/libalias/alias.h
+++ b/sys/netinet/libalias/alias.h
@@ -1,169 +1,156 @@
-/*lint -save -library Flexelint comment for external headers */
+/* lint -save -library Flexelint comment for external headers */
+
+/*-
+ * Alias.h defines the outside world interfaces for the packet aliasing
+ * software.
+ * 
+ * This software is placed into the public domain with no restrictions on its
+ * distribution.
+ * 
+ * $FreeBSD$
+ */
 
-/*
-    Alias.h defines the outside world interfaces for the packet
-    aliasing software.
+#ifndef _ALIAS_H_
+#define	_ALIAS_H_
 
-    This software is placed into the public domain with no restrictions
-    on its distribution.
+/* The external interface to libalias, the packet aliasing engine. */
 
- $FreeBSD$
-*/
+/* Initialization and control functions. */
+void	 PacketAliasInit(void);
+void	 PacketAliasSetAddress(struct in_addr _addr);
+void	 PacketAliasSetFWBase(unsigned int _base, unsigned int _num);
+unsigned int
+	 PacketAliasSetMode(unsigned int _flags, unsigned int _mask);
+void	 PacketAliasUninit(void);
 
+/* Packet Handling functions. */
+int	 PacketAliasIn(char *_ptr, int _maxpacketsize);
+int	 PacketAliasOut(char *_ptr, int _maxpacketsize);
+int	 PacketUnaliasOut(char *_ptr, int _maxpacketsize);
 
-#ifndef _ALIAS_H_
-#define _ALIAS_H_
+/* Port and address redirection functions. */
 
-/* Alias link representative (incomplete struct) */
-struct alias_link;
+/*
+ * An anonymous structure, a pointer to which is returned from
+ * PacketAliasRedirectAddr(), PacketAliasRedirectPort() or
+ * PacketAliasRedirectProto(), passed to PacketAliasAddServer(),
+ * and freed by PacketAliasRedirectDelete().
+ */
+struct	alias_link;
+
+int	 PacketAliasAddServer(struct alias_link *_link,
+	    struct in_addr _addr, unsigned short _port);
+struct alias_link *
+	 PacketAliasRedirectAddr(struct in_addr _src_addr,
+	    struct in_addr _alias_addr);
+void	 PacketAliasRedirectDelete(struct alias_link *_link);
+struct alias_link *
+	 PacketAliasRedirectPort(struct in_addr _src_addr,
+	    unsigned short _src_port, struct in_addr _dst_addr,
+	    unsigned short _dst_port, struct in_addr _alias_addr,
+	    unsigned short _alias_port, unsigned char _proto);
+struct alias_link *
+	 PacketAliasRedirectProto(struct in_addr _src_addr,
+	    struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    unsigned char _proto);
+
+/* Fragment Handling functions. */
+void	 PacketAliasFragmentIn(char *_ptr, char *_ptr_fragment);
+char	*PacketAliasGetFragment(char *_ptr);
+int	 PacketAliasSaveFragment(char *_ptr);
+
+/* Miscellaneous functions. */
+int	 PacketAliasCheckNewLink(void);
+unsigned short
+	 PacketAliasInternetChecksum(unsigned short *_ptr, int _nbytes);
+void	 PacketAliasSetTarget(struct in_addr _target_addr);
+
+/* Transparent proxying routines. */
+int	 PacketAliasProxyRule(const char *_cmd);
+
+/* Mode flags, set using PacketAliasSetMode() */
 
-/* External interfaces (API) to packet aliasing engine */
+/*
+ * If PKT_ALIAS_LOG is set, a message will be printed to /var/log/alias.log
+ * every time a link is created or deleted.  This is useful for debugging.
+ */
+#define	PKT_ALIAS_LOG			0x01
 
-/* Initialization and Control */
-    extern void
-    PacketAliasInit(void);
+/*
+ * If PKT_ALIAS_DENY_INCOMING is set, then incoming connections (e.g. to ftp,
+ * telnet or web servers will be prevented by the aliasing mechanism.
+ */
+#define	PKT_ALIAS_DENY_INCOMING		0x02
 
-    extern void
-    PacketAliasUninit(void);
+/*
+ * If PKT_ALIAS_SAME_PORTS is set, packets will be attempted sent from the
+ * same port as they originated on.  This allows e.g. rsh to work *99% of the
+ * time*, but _not_ 100% (it will be slightly flakey instead of not working
+ * at all).  This mode bit is set by PacketAliasInit(), so it is a default
+ * mode of operation.
+ */
+#define	PKT_ALIAS_SAME_PORTS		0x04
 
-    extern void
-    PacketAliasSetAddress(struct in_addr);
+/*
+ * If PKT_ALIAS_USE_SOCKETS is set, then when partially specified links (e.g.
+ * destination port and/or address is zero), the packet aliasing engine will
+ * attempt to allocate a socket for the aliasing port it chooses.  This will
+ * avoid interference with the host machine.  Fully specified links do not
+ * require this.  This bit is set after a call to PacketAliasInit(), so it is
+ * a default mode of operation.
+ */
+#define	PKT_ALIAS_USE_SOCKETS		0x08
+
+/*-
+ * If PKT_ALIAS_UNREGISTERED_ONLY is set, then only packets with
+ * unregistered source addresses will be aliased.  Private
+ * addresses are those in the following ranges:
+ *
+ *		10.0.0.0     ->   10.255.255.255
+ *		172.16.0.0   ->   172.31.255.255
+ *		192.168.0.0  ->   192.168.255.255
+ */
+#define	PKT_ALIAS_UNREGISTERED_ONLY	0x10
 
-    extern unsigned int
-    PacketAliasSetMode(unsigned int, unsigned int);
+/*
+ * If PKT_ALIAS_RESET_ON_ADDR_CHANGE is set, then the table of dynamic
+ * aliasing links will be reset whenever PacketAliasSetAddress() changes the
+ * default aliasing address.  If the default aliasing address is left
+ * unchanged by this function call, then the table of dynamic aliasing links
+ * will be left intact.  This bit is set after a call to PacketAliasInit().
+ */
+#define	PKT_ALIAS_RESET_ON_ADDR_CHANGE	0x20
 
 #ifndef NO_FW_PUNCH
-    extern void
-    PacketAliasSetFWBase(unsigned int, unsigned int);
+/*
+ * If PKT_ALIAS_PUNCH_FW is set, active FTP and IRC DCC connections will
+ * create a 'hole' in the firewall to allow the transfers to work.  The
+ * ipfw rule number that the hole is created with is controlled by
+ * PacketAliasSetFWBase().  The hole will be attached to that
+ * particular alias_link, so when the link goes away the hole is deleted.
+ */
+#define	PKT_ALIAS_PUNCH_FW		0x100
 #endif
 
-/* Packet Handling */
-    extern int
-    PacketAliasIn(char *, int);
-
-    extern int
-    PacketAliasOut(char *, int);
-
-    extern int
-    PacketUnaliasOut(char *, int);
-
-/* Port and Address Redirection */
-    extern struct alias_link *
-    PacketAliasRedirectPort(struct in_addr, u_short, 
-                            struct in_addr, u_short,
-                            struct in_addr, u_short,
-                            u_char);
-
-    extern int
-    PacketAliasAddServer(struct alias_link *, struct in_addr, u_short);
-
-    extern struct alias_link *
-    PacketAliasRedirectProto(struct in_addr,
-                             struct in_addr,
-                             struct in_addr,
-                             u_char);
-
-    extern struct alias_link *
-    PacketAliasRedirectAddr(struct in_addr,
-                            struct in_addr);
-
-    extern void
-    PacketAliasRedirectDelete(struct alias_link *);
-
-/* Fragment Handling */
-    extern int
-    PacketAliasSaveFragment(char *);
-
-    extern char *
-    PacketAliasGetFragment(char *);
-
-    extern void 
-    PacketAliasFragmentIn(char *, char *);
-
-/* Miscellaneous Functions */
-    extern void
-    PacketAliasSetTarget(struct in_addr);
-
-    extern int
-    PacketAliasCheckNewLink(void);
-
-    extern u_short
-    PacketAliasInternetChecksum(u_short *, int);
-
-/* Transparent Proxying */
-    extern int
-    PacketAliasProxyRule(const char *);
-
-
-/********************** Mode flags ********************/
-/* Set these flags using PacketAliasSetMode() */
-
-/* If PKT_ALIAS_LOG is set, a message will be printed to
-	/var/log/alias.log every time a link is created or deleted.  This
-	is useful for debugging */
-#define PKT_ALIAS_LOG 0x01
-
-/* If PKT_ALIAS_DENY_INCOMING is set, then incoming connections (e.g.
-	to ftp, telnet or web servers will be prevented by the aliasing
-	mechanism.  */
-#define PKT_ALIAS_DENY_INCOMING 0x02
-
-/* If PKT_ALIAS_SAME_PORTS is set, packets will be attempted sent from
-	the same port as they originated on.  This allows e.g. rsh to work
-	*99% of the time*, but _not_ 100%.  (It will be slightly flakey
-	instead of not working at all.)  This mode bit is set by
-        PacketAliasInit(), so it is a default mode of operation. */
-#define PKT_ALIAS_SAME_PORTS 0x04
-
-/* If PKT_ALIAS_USE_SOCKETS is set, then when partially specified
-	links (e.g. destination port and/or address is zero), the packet
-	aliasing engine will attempt to allocate a socket for the aliasing
-	port it chooses.  This will avoid interference with the host
-	machine.  Fully specified links do not require this.  This bit
-        is set after a call to PacketAliasInit(), so it is a default
-        mode of operation. */
-#define PKT_ALIAS_USE_SOCKETS 0x08
-
-/* If PKT_ALIAS_UNREGISTERED_ONLY is set, then only packets with
-	unregistered source addresses will be aliased.  Private
-	addresses are those in the following ranges:
-		10.0.0.0     ->   10.255.255.255
-		172.16.0.0   ->   172.31.255.255
-		192.168.0.0  ->   192.168.255.255  */
-#define PKT_ALIAS_UNREGISTERED_ONLY 0x10
-
-/* If PKT_ALIAS_RESET_ON_ADDR_CHANGE is set, then the table of dynamic
-	aliasing links will be reset whenever PacketAliasSetAddress()
-        changes the default aliasing address.  If the default aliasing
-        address is left unchanged by this function call, then the
-        table of dynamic aliasing links will be left intact.  This
-        bit is set after a call to PacketAliasInit(). */
-#define PKT_ALIAS_RESET_ON_ADDR_CHANGE 0x20
-
-#ifndef NO_FW_PUNCH
-/* If PKT_ALIAS_PUNCH_FW is set, active FTP and IRC DCC connections
-   will create a 'hole' in the firewall to allow the transfers to
-   work.  Where (IPFW "line-numbers") the hole is created is
-   controlled by PacketAliasSetFWBase(base, size). The hole will be
-   attached to that particular alias_link, so when the link goes away
-   so do the hole.  */
-#define PKT_ALIAS_PUNCH_FW 0x100
-#endif
+/*
+ * If PKT_ALIAS_PROXY_ONLY is set, then NAT will be disabled and only
+ * transparent proxying is performed.
+ */
+#define	PKT_ALIAS_PROXY_ONLY		0x40
 
-/* If PKT_ALIAS_PROXY_ONLY is set, then NAT will be disabled and only
-      transparent proxying performed */
-#define PKT_ALIAS_PROXY_ONLY 0x40
+/*
+ * If PKT_ALIAS_REVERSE is set, the actions of PacketAliasIn() and
+ * PacketAliasOut() are reversed.
+ */
+#define	PKT_ALIAS_REVERSE		0x80
 
-/* If PKT_ALIAS_REVERSE is set, the actions of PacketAliasIn()
-      and PacketAliasOut() are reversed */
-#define PKT_ALIAS_REVERSE 0x80
+/* Function return codes. */
+#define	PKT_ALIAS_ERROR			-1
+#define	PKT_ALIAS_OK			1
+#define	PKT_ALIAS_IGNORED		2
+#define	PKT_ALIAS_UNRESOLVED_FRAGMENT	3
+#define	PKT_ALIAS_FOUND_HEADER_FRAGMENT	4
 
-/* Return Codes */
-#define PKT_ALIAS_ERROR -1
-#define PKT_ALIAS_OK 1
-#define PKT_ALIAS_IGNORED 2
-#define PKT_ALIAS_UNRESOLVED_FRAGMENT 3
-#define PKT_ALIAS_FOUND_HEADER_FRAGMENT 4
+#endif /* !_ALIAS_H_ */
 
-#endif
-/*lint -restore */
+/* lint -restore */
diff --git a/sys/netinet/libalias/alias_db.c b/sys/netinet/libalias/alias_db.c
index f926239..60d425f 100644
--- a/sys/netinet/libalias/alias_db.c
+++ b/sys/netinet/libalias/alias_db.c
@@ -2634,12 +2634,6 @@ do {                                                    \
 } /*lint -save -e717 */ while(0) /*lint -restore */
 #define fw_tstfield(field, num) ((field)[(num) - fireWallBaseNum])
 
-void
-PacketAliasSetFWBase(unsigned int base, unsigned int num) {
-    fireWallBaseNum = base;
-    fireWallNumNums = num;
-}
-
 static void
 InitPunchFW(void) {
     fireWallField = malloc(fireWallNumNums);
@@ -2784,3 +2778,11 @@ ClearAllFWHoles(void) {
     memset(fireWallField, 0, fireWallNumNums);
 }
 #endif
+
+void
+PacketAliasSetFWBase(unsigned int base, unsigned int num) {
+#ifndef NO_FW_PUNCH
+    fireWallBaseNum = base;
+    fireWallNumNums = num;
+#endif
+}
diff --git a/sys/netinet/libalias/alias_local.h b/sys/netinet/libalias/alias_local.h
index c4292e4..152406d 100644
--- a/sys/netinet/libalias/alias_local.h
+++ b/sys/netinet/libalias/alias_local.h
@@ -1,211 +1,203 @@
-/* -*- mode: c; tab-width: 3; c-basic-offset: 3; -*-
-    Alias_local.h contains the function prototypes for alias.c,
-    alias_db.c, alias_util.c and alias_ftp.c, alias_irc.c (as well
-    as any future add-ons).  It also includes macros, globals and
-    struct definitions shared by more than one alias*.c file.
-
-    This include file is intended to be used only within the aliasing
-    software.  Outside world interfaces are defined in alias.h
-
-    This software is placed into the public domain with no restrictions
-    on its distribution.
-
-    Initial version:  August, 1996  (cjm)    
-    
-     <updated several times by original author and Eivind Eklund>
-
-    $FreeBSD$
-*/
-#ifndef ALIAS_LOCAL_H
-#define ALIAS_LOCAL_H
-
-#ifndef NULL
-#define NULL 0
-#endif
-
 /*
-    Macros
+ * Alias_local.h contains the function prototypes for alias.c,
+ * alias_db.c, alias_util.c and alias_ftp.c, alias_irc.c (as well
+ * as any future add-ons).  It also includes macros, globals and
+ * struct definitions shared by more than one alias*.c file.
+ *
+ * This include file is intended to be used only within the aliasing
+ * software.  Outside world interfaces are defined in alias.h
+ *
+ * This software is placed into the public domain with no restrictions
+ * on its distribution.
+ *
+ * Initial version:  August, 1996  (cjm)    
+ *
+ * <updated several times by original author and Eivind Eklund>
+ *
+ * $FreeBSD$
  */
 
-/*
-   The following macro is used to update an
-   internet checksum.  "delta" is a 32-bit
-   accumulation of all the changes to the
-   checksum (adding in new 16-bit words and
-   subtracting out old words), and "cksum"
-   is the checksum value to be updated.
-*/
-#define ADJUST_CHECKSUM(acc, cksum) { \
-    acc += cksum; \
-    if (acc < 0) \
-    { \
-        acc = -acc; \
-        acc = (acc >> 16) + (acc & 0xffff); \
-        acc += acc >> 16; \
-        cksum = (u_short) ~acc; \
-    } \
-    else \
-    { \
-        acc = (acc >> 16) + (acc & 0xffff); \
-        acc += acc >> 16; \
-        cksum = (u_short) acc; \
-    } \
-}
+#ifndef _ALIAS_LOCAL_H_
+#define	_ALIAS_LOCAL_H_
 
+/* Macros */
 
 /*
-    Globals
-*/
+ * The following macro is used to update an
+ * internet checksum.  "delta" is a 32-bit
+ * accumulation of all the changes to the
+ * checksum (adding in new 16-bit words and
+ * subtracting out old words), and "cksum"
+ * is the checksum value to be updated.
+ */
+#define	ADJUST_CHECKSUM(acc, cksum) \
+	do { \
+		acc += cksum; \
+		if (acc < 0) { \
+			acc = -acc; \
+			acc = (acc >> 16) + (acc & 0xffff); \
+			acc += acc >> 16; \
+			cksum = (u_short) ~acc; \
+		} else { \
+			acc = (acc >> 16) + (acc & 0xffff); \
+			acc += acc >> 16; \
+			cksum = (u_short) acc; \
+		} \
+	} while (0)
+
+/* Globals */
 
 extern int packetAliasMode;
 
-
-/*
-    Structs
-*/
-
-struct alias_link;    /* Incomplete structure */
-
-
-/*
-    Prototypes
-*/
+/* Prototypes */
 
 /* General utilities */
-u_short IpChecksum(struct ip *);
-u_short TcpChecksum(struct ip *);
-void DifferentialChecksum(u_short *, u_short *, u_short *, int);
+u_short	 IpChecksum(struct ip *_pip);
+u_short	 TcpChecksum(struct ip *_pip);
+void	 DifferentialChecksum(u_short *_cksum, u_short *_new, u_short *_old,
+	    int _n);
 
 /* Internal data access */
 struct alias_link *
-FindIcmpIn(struct in_addr, struct in_addr, u_short, int);
-
+	 FindIcmpIn(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_short _id_alias, int _create);
 struct alias_link *
-FindIcmpOut(struct in_addr, struct in_addr, u_short, int);
-
+	 FindIcmpOut(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    u_short _id, int _create);
 struct alias_link *
-FindFragmentIn1(struct in_addr, struct in_addr, u_short);
-
+	 FindFragmentIn1(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_short _ip_id);
 struct alias_link *
-FindFragmentIn2(struct in_addr, struct in_addr, u_short);
-
+	 FindFragmentIn2(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_short _ip_id);
 struct alias_link *
-AddFragmentPtrLink(struct in_addr, u_short);
-
+	 AddFragmentPtrLink(struct in_addr _dst_addr, u_short _ip_id);
 struct alias_link *
-FindFragmentPtr(struct in_addr, u_short);
-
+	 FindFragmentPtr(struct in_addr _dst_addr, u_short _ip_id);
 struct alias_link *
-FindProtoIn(struct in_addr, struct in_addr, u_char);
-
+	 FindProtoIn(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_char _proto);
 struct alias_link *
-FindProtoOut(struct in_addr, struct in_addr, u_char);
-
+	 FindProtoOut(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    u_char _proto);
 struct alias_link *
-FindUdpTcpIn (struct in_addr, struct in_addr, u_short, u_short, u_char, int);
-
+	 FindUdpTcpIn(struct in_addr _dst_addr, struct in_addr _alias_addr,
+	    u_short _dst_port, u_short _alias_port, u_char _proto, int _create);
 struct alias_link *
-FindUdpTcpOut(struct in_addr, struct in_addr, u_short, u_short, u_char, int);
-
+	 FindUdpTcpOut(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    u_short _src_port, u_short _dst_port, u_char _proto, int _create);
 struct alias_link *
-AddPptp(struct in_addr, struct in_addr, struct in_addr, u_int16_t);
-
+	 AddPptp(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    struct in_addr _alias_addr, u_int16_t _src_call_id);
 struct alias_link *
-FindPptpOutByCallId(struct in_addr, struct in_addr, u_int16_t);
-
+	 FindPptpOutByCallId(struct in_addr _src_addr,
+	    struct in_addr _dst_addr, u_int16_t _src_call_id);
 struct alias_link *
-FindPptpInByCallId(struct in_addr, struct in_addr, u_int16_t);
-
+	 FindPptpInByCallId(struct in_addr _dst_addr,
+	    struct in_addr _alias_addr, u_int16_t _dst_call_id);
 struct alias_link *
-FindPptpOutByPeerCallId(struct in_addr, struct in_addr, u_int16_t);
-
+	 FindPptpOutByPeerCallId(struct in_addr _src_addr,
+	    struct in_addr _dst_addr, u_int16_t _dst_call_id);
 struct alias_link *
-FindPptpInByPeerCallId(struct in_addr, struct in_addr, u_int16_t);
-
+	 FindPptpInByPeerCallId(struct in_addr _dst_addr,
+	    struct in_addr _alias_addr, u_int16_t _alias_call_id);
 struct alias_link *
-FindRtspOut(struct in_addr, struct in_addr, u_short, u_short, u_char);
-
+	 FindRtspOut(struct in_addr _src_addr, struct in_addr _dst_addr,
+	    u_short _src_port, u_short _alias_port, u_char _proto);
 struct in_addr
-FindOriginalAddress(struct in_addr);
-
+	 FindOriginalAddress(struct in_addr _alias_addr);
 struct in_addr
-FindAliasAddress(struct in_addr);
+	 FindAliasAddress(struct in_addr _original_addr);
 
 /* External data access/modification */
-int FindNewPortGroup(struct in_addr, struct in_addr,
-                     u_short, u_short, u_short, u_char, u_char);
-void GetFragmentAddr(struct alias_link *, struct in_addr *);
-void SetFragmentAddr(struct alias_link *, struct in_addr);
-void GetFragmentPtr(struct alias_link *, char **);
-void SetFragmentPtr(struct alias_link *, char *);
-void SetStateIn(struct alias_link *, int);
-void SetStateOut(struct alias_link *, int);
-int GetStateIn(struct alias_link *);
-int GetStateOut(struct alias_link *);
-struct in_addr GetOriginalAddress(struct alias_link *);
-struct in_addr GetDestAddress(struct alias_link *);
-struct in_addr GetAliasAddress(struct alias_link *);
-struct in_addr GetDefaultAliasAddress(void);
-void SetDefaultAliasAddress(struct in_addr);
-u_short GetOriginalPort(struct alias_link *);
-u_short GetAliasPort(struct alias_link *);
-struct in_addr GetProxyAddress(struct alias_link *);
-void SetProxyAddress(struct alias_link *, struct in_addr);
-u_short GetProxyPort(struct alias_link *);
-void SetProxyPort(struct alias_link *, u_short);
-void SetAckModified(struct alias_link *);
-int GetAckModified(struct alias_link *);
-int GetDeltaAckIn(struct ip *, struct alias_link *);
-int GetDeltaSeqOut(struct ip *, struct alias_link *);
-void AddSeq(struct ip *, struct alias_link *, int);
-void SetExpire(struct alias_link *, int);
-void ClearCheckNewLink(void);
-void SetLastLineCrlfTermed(struct alias_link *, int);
-int GetLastLineCrlfTermed(struct alias_link *);
-void SetDestCallId(struct alias_link *, u_int16_t);
+int	 FindNewPortGroup(struct in_addr _dst_addr, struct in_addr _alias_addr,
+                     u_short _src_port, u_short _dst_port, u_short _port_count,
+		     u_char _proto, u_char _align);
+void	 GetFragmentAddr(struct alias_link *_link, struct in_addr *_src_addr);
+void	 SetFragmentAddr(struct alias_link *_link, struct in_addr _src_addr);
+void	 GetFragmentPtr(struct alias_link *_link, char **_fptr);
+void	 SetFragmentPtr(struct alias_link *_link, char *fptr);
+void	 SetStateIn(struct alias_link *_link, int _state);
+void	 SetStateOut(struct alias_link *_link, int _state);
+int	 GetStateIn(struct alias_link *_link);
+int	 GetStateOut(struct alias_link *_link);
+struct in_addr
+	 GetOriginalAddress(struct alias_link *_link);
+struct in_addr
+	 GetDestAddress(struct alias_link *_link);
+struct in_addr
+	 GetAliasAddress(struct alias_link *_link);
+struct in_addr
+	 GetDefaultAliasAddress(void);
+void	 SetDefaultAliasAddress(struct in_addr _alias_addr);
+u_short	 GetOriginalPort(struct alias_link *_link);
+u_short	 GetAliasPort(struct alias_link *_link);
+struct in_addr
+	 GetProxyAddress(struct alias_link *_link);
+void	 SetProxyAddress(struct alias_link *_link, struct in_addr _addr);
+u_short	 GetProxyPort(struct alias_link *_link);
+void	 SetProxyPort(struct alias_link *_link, u_short _port);
+void	 SetAckModified(struct alias_link *_link);
+int	 GetAckModified(struct alias_link *_link);
+int	 GetDeltaAckIn(struct ip *_pip, struct alias_link *_link);
+int	 GetDeltaSeqOut(struct ip *_pip, struct alias_link *_link);
+void	 AddSeq(struct ip *_pip, struct alias_link *_link, int _delta);
+void	 SetExpire(struct alias_link *_link, int _expire);
+void	 ClearCheckNewLink(void);
+void	 SetLastLineCrlfTermed(struct alias_link *_link, int _yes);
+int	 GetLastLineCrlfTermed(struct alias_link *_link);
+void	 SetDestCallId(struct alias_link *_link, u_int16_t _cid);
 #ifndef NO_FW_PUNCH
-void PunchFWHole(struct alias_link *);
+void	 PunchFWHole(struct alias_link *_link);
 #endif
 
-
 /* Housekeeping function */
-void HouseKeeping(void);
+void	 HouseKeeping(void);
 
 /* Tcp specfic routines */
-/*lint -save -library Suppress flexelint warnings */
+/* lint -save -library Suppress flexelint warnings */
 
 /* FTP routines */
-void AliasHandleFtpOut(struct ip *, struct alias_link *, int);
+void	 AliasHandleFtpOut(struct ip *_pip, struct alias_link *_link,
+	    int _maxpacketsize);
 
 /* IRC routines */
-void AliasHandleIrcOut(struct ip *, struct alias_link *, int);
+void	 AliasHandleIrcOut(struct ip *_pip, struct alias_link *_link,
+	    int _maxsize);
 
 /* RTSP routines */
-void AliasHandleRtspOut(struct ip *, struct alias_link *, int);
+void	 AliasHandleRtspOut(struct ip *_pip, struct alias_link *_link,
+	    int _maxpacketsize);
 
 /* PPTP routines */
-void AliasHandlePptpOut(struct ip *, struct alias_link *);
-void AliasHandlePptpIn(struct ip *, struct alias_link *);
-int AliasHandlePptpGreOut(struct ip *);
-int AliasHandlePptpGreIn(struct ip *);
+void	 AliasHandlePptpOut(struct ip *_pip, struct alias_link *_link);
+void	 AliasHandlePptpIn(struct ip *_pip, struct alias_link *_link);
+int	 AliasHandlePptpGreOut(struct ip *_pip);
+int	 AliasHandlePptpGreIn(struct ip *_pip);
 
 /* NetBIOS routines */
-int AliasHandleUdpNbt(struct ip *, struct alias_link *, struct in_addr *, u_short);
-int AliasHandleUdpNbtNS(struct ip *, struct alias_link *, struct in_addr *, u_short *, struct in_addr *, u_short *);
+int	 AliasHandleUdpNbt(struct ip *_pip, struct alias_link *_link,
+	    struct in_addr *_alias_address, u_short _alias_port);
+int	 AliasHandleUdpNbtNS(struct ip *_pip, struct alias_link *_link,
+	    struct in_addr *_alias_address, u_short *_alias_port,
+	    struct in_addr *_original_address, u_short *_original_port);
 
 /* CUSeeMe routines */
-void AliasHandleCUSeeMeOut(struct ip *, struct alias_link *);
-void AliasHandleCUSeeMeIn(struct ip *, struct in_addr);
+void	 AliasHandleCUSeeMeOut(struct ip *_pip, struct alias_link *_link);
+void	 AliasHandleCUSeeMeIn(struct ip *_pip, struct in_addr _original_addr);
 
 /* Transparent proxy routines */
-int ProxyCheck(struct ip *, struct in_addr *, u_short *);
-void ProxyModify(struct alias_link *, struct ip *, int, int);
-
+int	 ProxyCheck(struct ip *_pip, struct in_addr *_proxy_server_addr,
+	    u_short *_proxy_server_port);
+void	 ProxyModify(struct alias_link *_link, struct ip *_pip,
+	    int _maxpacketsize, int _proxy_type);
 
 enum alias_tcp_state {
-    ALIAS_TCP_STATE_NOT_CONNECTED,
-    ALIAS_TCP_STATE_CONNECTED,
-    ALIAS_TCP_STATE_DISCONNECTED
+	ALIAS_TCP_STATE_NOT_CONNECTED,
+	ALIAS_TCP_STATE_CONNECTED,
+	ALIAS_TCP_STATE_DISCONNECTED
 };
+
 /*lint -restore */
-#endif /* defined(ALIAS_LOCAL_H) */
+
+#endif /* !_ALIAS_LOCAL_H_ */
diff --git a/sys/netinet/libalias/alias_nbt.c b/sys/netinet/libalias/alias_nbt.c
index 065fe37..74fe56e 100644
--- a/sys/netinet/libalias/alias_nbt.c
+++ b/sys/netinet/libalias/alias_nbt.c
@@ -241,7 +241,7 @@ int AliasHandleUdpNbt(
 		sptr = (u_short *) alias_address;
 		acc -= *sptr++;
 		acc -= *sptr;
-		ADJUST_CHECKSUM(acc, uh->uh_sum)
+		ADJUST_CHECKSUM(acc, uh->uh_sum);
 	}
     ndh->source_ip = *alias_address;
     ndh->source_port = alias_port;
@@ -358,7 +358,7 @@ AliasHandleResourceNB(
             	sptr = (u_short *) &(nbtarg->newaddr);
             	acc -= *sptr++;
             	acc -= *sptr;
-            	ADJUST_CHECKSUM(acc, *nbtarg->uh_sum)
+            	ADJUST_CHECKSUM(acc, *nbtarg->uh_sum);
 			}
 
 			nb->addr = nbtarg->newaddr;
@@ -426,7 +426,7 @@ AliasHandleResourceA(
             	sptr = (u_short *) &nbtarg->newaddr; /* New */
             	acc -= *sptr++;
             	acc -= *sptr;
-            	ADJUST_CHECKSUM(acc, *nbtarg->uh_sum)
+            	ADJUST_CHECKSUM(acc, *nbtarg->uh_sum);
 			}
 
 			a->addr = nbtarg->newaddr;
diff --git a/sys/netinet/libalias/alias_pptp.c b/sys/netinet/libalias/alias_pptp.c
index 373e33f..dbab7a9 100644
--- a/sys/netinet/libalias/alias_pptp.c
+++ b/sys/netinet/libalias/alias_pptp.c
@@ -71,6 +71,8 @@
 #include <netinet/ip.h>
 #include <netinet/tcp.h>
 
+#include <stdio.h>
+
 #include "alias_local.h"
 
 /*