diff options
author | Ruslan Ermilov <ru@FreeBSD.org> | 2003-06-01 22:49:59 +0000 |
---|---|---|
committer | Ruslan Ermilov <ru@FreeBSD.org> | 2003-06-01 22:49:59 +0000 |
commit | f1a529f3da97dddae7572c8d31d7e912422f1657 (patch) | |
tree | cf06bfc7dad89a44777d0f9f970f360a4b3954a4 /lib/libalias | |
parent | ebe5d44d5a9d9dfa1323f42b460397074654a1bf (diff) | |
download | src-f1a529f3da97dddae7572c8d31d7e912422f1657.tar.gz src-f1a529f3da97dddae7572c8d31d7e912422f1657.zip |
Make the PacketAliasSetAddress() function call optional. If it
is not called, and no static rules match an outgoing packet, the
latter retains its source IP address. This is in support of the
"static NAT only" mode.
Notes
Notes:
svn path=/head/; revision=115648
Diffstat (limited to 'lib/libalias')
-rw-r--r-- | lib/libalias/alias_db.c | 16 | ||||
-rw-r--r-- | lib/libalias/libalias.3 | 13 |
2 files changed, 18 insertions, 11 deletions
diff --git a/lib/libalias/alias_db.c b/lib/libalias/alias_db.c index e3aab97dd0f6..1b59b0572b89 100644 --- a/lib/libalias/alias_db.c +++ b/lib/libalias/alias_db.c @@ -1239,7 +1239,7 @@ FindLinkOut(struct in_addr src_addr, 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 && + if (aliasAddress.s_addr != INADDR_ANY && src_addr.s_addr == aliasAddress.s_addr) { link = _FindLinkOut(nullAddress, dst_addr, src_port, dst_port, @@ -1395,7 +1395,7 @@ FindLinkIn(struct in_addr dst_addr, 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 && + if (aliasAddress.s_addr != INADDR_ANY && alias_addr.s_addr == aliasAddress.s_addr) { link = _FindLinkIn(dst_addr, nullAddress, dst_port, alias_port, @@ -1805,7 +1805,8 @@ FindOriginalAddress(struct in_addr alias_addr) if (targetAddress.s_addr == INADDR_ANY) return alias_addr; else if (targetAddress.s_addr == INADDR_NONE) - return aliasAddress; + return (aliasAddress.s_addr != INADDR_ANY) ? + aliasAddress : alias_addr; else return targetAddress; } @@ -1818,7 +1819,8 @@ FindOriginalAddress(struct in_addr alias_addr) link->server = link->server->next; return (src_addr); } else if (link->src_addr.s_addr == INADDR_ANY) - return aliasAddress; + return (aliasAddress.s_addr != INADDR_ANY) ? + aliasAddress : alias_addr; else return link->src_addr; } @@ -1834,12 +1836,14 @@ FindAliasAddress(struct in_addr original_addr) 0, 0, LINK_ADDR, 0); if (link == NULL) { - return aliasAddress; + return (aliasAddress.s_addr != INADDR_ANY) ? + aliasAddress : original_addr; } else { if (link->alias_addr.s_addr == INADDR_ANY) - return aliasAddress; + return (aliasAddress.s_addr != INADDR_ANY) ? + aliasAddress : original_addr; else return link->alias_addr; } diff --git a/lib/libalias/libalias.3 b/lib/libalias/libalias.3 index cd8b97c39094..71735b2a592a 100644 --- a/lib/libalias/libalias.3 +++ b/lib/libalias/libalias.3 @@ -66,11 +66,12 @@ The packet aliasing engine was designed to operate in user space outside of the kernel, without any access to private kernel data structure, but the source code can also be ported to a kernel environment. .Sh INITIALIZATION AND CONTROL -Two special functions, -.Fn PacketAliasInit -and -.Fn PacketAliasSetAddress , +One special function, +.Fn PacketAliasInit , must always be called before any packet handling may be performed. +Normally, the +.Fn PacketAliasSetAddress +function is called afterwards, to set the default aliasing address. In addition, the operating mode of the packet aliasing engine can be customized by calling .Fn PacketAliasSetMode . @@ -98,7 +99,7 @@ below for the meaning of these mode bits. This function will always return the packet aliasing engine to the same initial state. .Fn PacketAliasSetAddress -must be called afterwards, and any desired changes from the default mode +is normally called afterwards, and any desired changes from the default mode bits listed above require a call to .Fn PacketAliasSetMode . .Pp @@ -130,6 +131,8 @@ local area network are aliased. All outgoing packets are re-mapped to this address unless overridden by a static address mapping established by .Fn PacketAliasRedirectAddr . +If this function is not called, and no static rules match, an outgoing +packet retains its source address. .Pp If the .Dv PKT_ALIAS_RESET_ON_ADDR_CHANGE |