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Properly handle the case when either the aliasing or source address of

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the link are equal to the default aliasing address.  Do not zero them!

This will fix the problem with non-working links added with the source
and/or aliasing address equal to the default aliasing address, but the
default aliasing address is set later, after the link has been set up,
like both natd(8) and ppp(8) do (for objective reasons).

Reviewed by:	Brian Somers <brian@FreeBSD.org>,
		Eivind Eklund <eivind@FreeBSD.org>,
		Charles Mott <cmott@srv.net>
This commit is contained in:
Ruslan Ermilov 1999-09-27 08:40:36 +00:00
parent 77b4241c45
commit 838d9af2c8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=51727
2 changed files with 132 additions and 52 deletions
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92
lib/libalias/alias_db.c
View File

@ -859,17 +859,6 @@ AddLink(struct in_addr src_addr,
link = malloc(sizeof(struct alias_link));
if (link != NULL)
{
/* If either the aliasing address or source address are
equal to the default device address (equal to the
global variable aliasAddress), then set the alias
address field of the link record to zero */
if (src_addr.s_addr == aliasAddress.s_addr)
src_addr.s_addr = 0;
if (alias_addr.s_addr == aliasAddress.s_addr)
alias_addr.s_addr = 0;
/* Basic initialization */
link->src_addr = src_addr;
link->dst_addr = dst_addr;
@ -1030,7 +1019,7 @@ ReLink(struct alias_link *old_link,
}
static struct alias_link *
FindLinkOut(struct in_addr src_addr,
_FindLinkOut(struct in_addr src_addr,
struct in_addr dst_addr,
u_short src_port,
u_short dst_port,
@ -1040,9 +1029,6 @@ FindLinkOut(struct in_addr src_addr,
u_int i;
struct alias_link *link;
if (src_addr.s_addr == aliasAddress.s_addr)
src_addr.s_addr = 0;
i = StartPointOut(src_addr, dst_addr, src_port, dst_port, link_type);
link = linkTableOut[i];
while (link != NULL)
@ -1064,7 +1050,8 @@ FindLinkOut(struct in_addr src_addr,
{
if (dst_port != 0)
{
link = FindLinkOut(src_addr, dst_addr, src_port, 0, link_type, 0);
link = _FindLinkOut(src_addr, dst_addr, src_port, 0,
link_type, 0);
if (link != NULL && replace_partial_links)
{
link = ReLink(link,
@ -1075,7 +1062,38 @@ FindLinkOut(struct in_addr src_addr,
}
else if (dst_addr.s_addr != 0)
{
link = FindLinkOut(src_addr, nullAddress, src_port, 0, link_type, 0);
link = _FindLinkOut(src_addr, nullAddress, src_port, 0,
link_type, 0);
}
}
return(link);
}
static struct alias_link *
FindLinkOut(struct in_addr src_addr,
struct in_addr dst_addr,
u_short src_port,
u_short dst_port,
int link_type,
int replace_partial_links)
{
struct alias_link *link;
link = _FindLinkOut(src_addr, dst_addr, src_port, dst_port,
link_type, replace_partial_links);
if (link == NULL)
{
/* The following allows permanent links to be
specified as using the default source address
(i.e. device interface address) without knowing
in advance what that address is. */
if (aliasAddress.s_addr != 0 &&
src_addr.s_addr == aliasAddress.s_addr)
{
link = _FindLinkOut(nullAddress, dst_addr, src_port, dst_port,
link_type, replace_partial_links);
}
}
@ -1084,7 +1102,7 @@ FindLinkOut(struct in_addr src_addr,
struct alias_link *
FindLinkIn(struct in_addr dst_addr,
_FindLinkIn(struct in_addr dst_addr,
struct in_addr alias_addr,
u_short dst_port,
u_short alias_port,
@ -1114,14 +1132,6 @@ FindLinkIn(struct in_addr dst_addr,
if (dst_port == 0)
flags_in |= LINK_UNKNOWN_DEST_PORT;
/* The following allows permanent links to be
be specified as using the default aliasing address
(i.e. device interface address) without knowing
in advance what that address is. */
if (alias_addr.s_addr == aliasAddress.s_addr)
alias_addr.s_addr = 0;
/* Search loop */
start_point = StartPointIn(alias_addr, alias_port, link_type);
link = linkTableIn[start_point];
@ -1218,6 +1228,36 @@ FindLinkIn(struct in_addr dst_addr,
}
}
struct alias_link *
FindLinkIn(struct in_addr dst_addr,
struct in_addr alias_addr,
u_short dst_port,
u_short alias_port,
int link_type,
int replace_partial_links)
{
struct alias_link *link;
link = _FindLinkIn(dst_addr, alias_addr, dst_port, alias_port,
link_type, replace_partial_links);
if (link == NULL)
{
/* The following allows permanent links to be
specified as using the default aliasing address
(i.e. device interface address) without knowing
in advance what that address is. */
if (aliasAddress.s_addr != 0 &&
alias_addr.s_addr == aliasAddress.s_addr)
{
link = _FindLinkIn(dst_addr, nullAddress, dst_port, alias_port,
link_type, replace_partial_links);
}
}
return(link);
}

92
sys/netinet/libalias/alias_db.c
View File

@ -859,17 +859,6 @@ AddLink(struct in_addr src_addr,
link = malloc(sizeof(struct alias_link));
if (link != NULL)
{
/* If either the aliasing address or source address are
equal to the default device address (equal to the
global variable aliasAddress), then set the alias
address field of the link record to zero */
if (src_addr.s_addr == aliasAddress.s_addr)
src_addr.s_addr = 0;
if (alias_addr.s_addr == aliasAddress.s_addr)
alias_addr.s_addr = 0;
/* Basic initialization */
link->src_addr = src_addr;
link->dst_addr = dst_addr;
@ -1030,7 +1019,7 @@ ReLink(struct alias_link *old_link,
}
static struct alias_link *
FindLinkOut(struct in_addr src_addr,
_FindLinkOut(struct in_addr src_addr,
struct in_addr dst_addr,
u_short src_port,
u_short dst_port,
@ -1040,9 +1029,6 @@ FindLinkOut(struct in_addr src_addr,
u_int i;
struct alias_link *link;
if (src_addr.s_addr == aliasAddress.s_addr)
src_addr.s_addr = 0;
i = StartPointOut(src_addr, dst_addr, src_port, dst_port, link_type);
link = linkTableOut[i];
while (link != NULL)
@ -1064,7 +1050,8 @@ FindLinkOut(struct in_addr src_addr,
{
if (dst_port != 0)
{
link = FindLinkOut(src_addr, dst_addr, src_port, 0, link_type, 0);
link = _FindLinkOut(src_addr, dst_addr, src_port, 0,
link_type, 0);
if (link != NULL && replace_partial_links)
{
link = ReLink(link,
@ -1075,7 +1062,38 @@ FindLinkOut(struct in_addr src_addr,
}
else if (dst_addr.s_addr != 0)
{
link = FindLinkOut(src_addr, nullAddress, src_port, 0, link_type, 0);
link = _FindLinkOut(src_addr, nullAddress, src_port, 0,
link_type, 0);
}
}
return(link);
}
static struct alias_link *
FindLinkOut(struct in_addr src_addr,
struct in_addr dst_addr,
u_short src_port,
u_short dst_port,
int link_type,
int replace_partial_links)
{
struct alias_link *link;
link = _FindLinkOut(src_addr, dst_addr, src_port, dst_port,
link_type, replace_partial_links);
if (link == NULL)
{
/* The following allows permanent links to be
specified as using the default source address
(i.e. device interface address) without knowing
in advance what that address is. */
if (aliasAddress.s_addr != 0 &&
src_addr.s_addr == aliasAddress.s_addr)
{
link = _FindLinkOut(nullAddress, dst_addr, src_port, dst_port,
link_type, replace_partial_links);
}
}
@ -1084,7 +1102,7 @@ FindLinkOut(struct in_addr src_addr,
struct alias_link *
FindLinkIn(struct in_addr dst_addr,
_FindLinkIn(struct in_addr dst_addr,
struct in_addr alias_addr,
u_short dst_port,
u_short alias_port,
@ -1114,14 +1132,6 @@ FindLinkIn(struct in_addr dst_addr,
if (dst_port == 0)
flags_in |= LINK_UNKNOWN_DEST_PORT;
/* The following allows permanent links to be
be specified as using the default aliasing address
(i.e. device interface address) without knowing
in advance what that address is. */
if (alias_addr.s_addr == aliasAddress.s_addr)
alias_addr.s_addr = 0;
/* Search loop */
start_point = StartPointIn(alias_addr, alias_port, link_type);
link = linkTableIn[start_point];
@ -1218,6 +1228,36 @@ FindLinkIn(struct in_addr dst_addr,
}
}
struct alias_link *
FindLinkIn(struct in_addr dst_addr,
struct in_addr alias_addr,
u_short dst_port,
u_short alias_port,
int link_type,
int replace_partial_links)
{
struct alias_link *link;
link = _FindLinkIn(dst_addr, alias_addr, dst_port, alias_port,
link_type, replace_partial_links);
if (link == NULL)
{
/* The following allows permanent links to be
specified as using the default aliasing address
(i.e. device interface address) without knowing
in advance what that address is. */
if (aliasAddress.s_addr != 0 &&
alias_addr.s_addr == aliasAddress.s_addr)
{
link = _FindLinkIn(dst_addr, nullAddress, dst_port, alias_port,
link_type, replace_partial_links);
}
}
return(link);
}