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Backport of WL#798 (MySQL IPv6 support) from 6.0.

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The following 6.0 revisions were analyzed:
  - sp1r-brian@zim.(none)-20071228102738-21894
  - sp1r-brian@zim.(none)-20071228121841-56447
  - sp1r-brian@zim.(none)-20071228205403-56423
  - sp1r-brian@zim.(none)-20071228221139-55341
  - sp1r-brian@zim.(none)-20071228233443-55352
  - sp1r-brian@zim.(none)-20071229094527-61763
  - sp1r-brian@zim.(none)-20071230203739-61746
  - sp1r-brian@zim.(none)-20080102213805-61741
  - sp1r-brian@zim.(none)-20080103201041-61746
  - sp1r-brian@zim.(none)-20080104234927-59875
  - sp1r-brian@zim.(none)-20080105005827-59874
  - sp1r-brian@zim.(none)-20080105012020-59865
  - sp1r-brian@zim.(none)-20080106003858-59857
  - sp1r-brian@zim.(none)-20080123195552-31680
  - sp1r-brian@zim.(none)-20080124201848-29999
  - sp1r-brian@zim.(none)-20080129075144-36991
  - sp1r-cbell/Chuck@mysql_cab_desk.-20080215041806-21954
  - sp1r-vvaintroub@wva.-20080212124547-06272
  - sp1r-dfischer/mysqldev@mysql.com/production.mysql.com-20071223184258-15140
  - sp1r-brian@zim.(none)-20080206122216-35774
  - sp1r-baker@bk-internal.mysql.com-20080209005622-35947
  - sp1r-baker@bk-internal.mysql.com-20080224215608-24613
  - sp1r-baker@bk-internal.mysql.com-20080307170710-63543
  - sp1r-baker@bk-internal.mysql.com-20080312233205-13069
  - sp1r-Reggie@core.-20080402175211-28643
  - kpettersson@mysql.com-20080901101150-4ne74r8v0492vv42
  - alik@sun.com-20090805173811-9fzt0ymcp9tsvn7k
  - alik@sun.com-20090805173937-fcv1fdveodq5x9gb
  - alik@sun.com-20090805175009-g1od16i3t1xkw2qr
  - kostja@sun.com-20090805200643-j9i4fy7ii8ijho5c
  - alik@sun.com-20090807195303-j4fb5m4l1dgdahwo
  - alik@sun.com-20090808114848-3rkzr9kifrijzaqy
  - alik@sun.com-20090810041739-ugmx34h34uid8mox
  - alik@sun.com-20090810105306-rf43rfyzzblsy5e7
  - alik@sun.com-20090810123113-ccdjwai68b5woqdm
  - alik@sun.com-20090811080423-gb7pibec1znaydzy
  - alik@sun.com-20090811082130-5uckar1vx3kdsw7g
  - alik@sun.com-20090812202051-uqkfwwxxcjvo5ean

The following bugfixes are also backported within this patch:
  - Bug#34292: netdb.h missing in hostname.cc
  - Bug#39153: Failing to lookup a host name can lead to crash
    in current IPv6 implementation
  - Bug#38247: Server does not resolve connecting ip's
  - Bug#43006: main.skip_name_resolve fails on Windows in PB2
  - Bug#45606: ACL requires IPv4-mapped addresses to be used
  - Bug#45584: Host name cache does not work as a cache
This commit is contained in:
Alexander Nozdrin 2009-11-25 13:53:23 +03:00
commit 7eb84da890
18 changed files with 1034 additions and 377 deletions
Download patch file Download diff file Expand all files Collapse all files

260
vio/viosocket.c
View file

@ -300,53 +300,209 @@ my_socket vio_fd(Vio* vio)
return vio->sd;
}
/**
Convert a sock-address (AF_INET or AF_INET6) into the "normalized" form,
which is the IPv4 form for IPv4-mapped or IPv4-compatible IPv6 addresses.
my_bool vio_peer_addr(Vio * vio, char *buf, uint16 *port)
@note Background: when IPv4 and IPv6 are used simultaneously, IPv4
addresses may be written in a form of IPv4-mapped or IPv4-compatible IPv6
addresses. That means, one address (a.b.c.d) can be written in three forms:
- IPv4: a.b.c.d;
- IPv4-compatible IPv6: ::a.b.c.d;
- IPv4-mapped IPv4: ::ffff:a.b.c.d;
Having three forms of one address makes it a little difficult to compare
addresses with each other (the IPv4-compatible IPv6-address of foo.bar
will be different from the IPv4-mapped IPv6-address of foo.bar).
@note This function can be made public when it's needed.
@param src [in] source IP address (AF_INET or AF_INET6).
@param src_length [in] length of the src.
@param dst [out] a buffer to store normalized IP address
(sockaddr_storage).
@param dst_length [out] actual length of the normalized IP address.
*/
static void vio_get_normalized_ip(const struct sockaddr *src,
int src_length,
struct sockaddr *dst,
int *dst_length)
{
switch (src->sa_family) {
case AF_INET:
memcpy(dst, src, src_length);
*dst_length= src_length;
break;
#ifdef HAVE_IPV6
case AF_INET6:
{
const struct sockaddr_in6 *src_addr6= (const struct sockaddr_in6 *) src;
const struct in6_addr *src_ip6= &(src_addr6->sin6_addr);
const uint32 *src_ip6_int32= (uint32 *) src_ip6->s6_addr;
if (IN6_IS_ADDR_V4MAPPED(src_ip6) || IN6_IS_ADDR_V4COMPAT(src_ip6))
{
struct sockaddr_in *dst_ip4= (struct sockaddr_in *) dst;
/*
This is an IPv4-mapped or IPv4-compatible IPv6 address. It should
be converted to the IPv4 form.
*/
*dst_length= sizeof (struct sockaddr_in);
memset(dst_ip4, 0, *dst_length);
dst_ip4->sin_family= AF_INET;
dst_ip4->sin_port= src_addr6->sin6_port;
/*
In an IPv4 mapped or compatible address, the last 32 bits represent
the IPv4 address. The byte orders for IPv6 and IPv4 addresses are
the same, so a simple copy is possible.
*/
dst_ip4->sin_addr.s_addr= src_ip6_int32[3];
}
else
{
/* This is a "native" IPv6 address. */
memcpy(dst, src, src_length);
*dst_length= src_length;
}
break;
}
#endif /* HAVE_IPV6 */
}
}
/**
Return the normalized IP address string for a sock-address.
The idea is to return an IPv4-address for an IPv4-mapped and
IPv4-compatible IPv6 address.
The function writes the normalized IP address to the given buffer.
The buffer should have enough space, otherwise error flag is returned.
The system constant INET6_ADDRSTRLEN can be used to reserve buffers of
the right size.
@param addr [in] sockaddr object (AF_INET or AF_INET6).
@param addr_length [in] length of the addr.
@param ip_string [out] buffer to write normalized IP address.
@param ip_string_size [in] size of the ip_string.
@return Error status.
@retval TRUE in case of error (the ip_string buffer is not enough).
@retval FALSE on success.
*/
my_bool vio_get_normalized_ip_string(const struct sockaddr *addr,
int addr_length,
char *ip_string,
size_t ip_string_size)
{
struct sockaddr_storage norm_addr_storage;
struct sockaddr *norm_addr= (struct sockaddr *) &norm_addr_storage;
int norm_addr_length;
int err_code;
vio_get_normalized_ip(addr, addr_length, norm_addr, &norm_addr_length);
err_code= vio_getnameinfo(norm_addr, ip_string, ip_string_size, NULL, 0,
NI_NUMERICHOST);
if (!err_code)
return FALSE;
DBUG_PRINT("error", ("getnameinfo() failed with %d (%s).",
(int) err_code,
(const char *) gai_strerror(err_code)));
return TRUE;
}
/**
Return IP address and port of a VIO client socket.
The function returns an IPv4 address if IPv6 support is disabled.
The function returns an IPv4 address if the client socket is associated
with an IPv4-compatible or IPv4-mapped IPv6 address. Otherwise, the native
IPv6 address is returned.
*/
my_bool vio_peer_addr(Vio *vio, char *ip_buffer, uint16 *port,
size_t ip_buffer_size)
{
DBUG_ENTER("vio_peer_addr");
DBUG_PRINT("enter", ("sd: %d", vio->sd));
DBUG_PRINT("enter", ("Client socked fd: %d", (int) vio->sd));
if (vio->localhost)
{
strmov(buf,"127.0.0.1");
/*
Initialize vio->remote and vio->addLen. Set vio->remote to IPv4 loopback
address.
*/
struct in_addr *ip4= &((struct sockaddr_in *) &(vio->remote))->sin_addr;
vio->remote.ss_family= AF_INET;
vio->addrLen= sizeof (struct sockaddr_in);
ip4->s_addr= htonl(INADDR_LOOPBACK);
/* Initialize ip_buffer and port. */
strmov(ip_buffer, "127.0.0.1");
*port= 0;
}
else
{
size_socket addrLen = sizeof(vio->remote);
if (getpeername(vio->sd, (struct sockaddr *) (&vio->remote),
&addrLen) != 0)
int err_code;
char port_buffer[NI_MAXSERV];
struct sockaddr_storage addr_storage;
struct sockaddr *addr= (struct sockaddr *) &addr_storage;
size_socket addr_length= sizeof (addr_storage);
/* Get sockaddr by socked fd. */
err_code= getpeername(vio->sd, addr, &addr_length);
if (err_code)
{
DBUG_PRINT("exit", ("getpeername gave error: %d", socket_errno));
DBUG_RETURN(1);
DBUG_PRINT("exit", ("getpeername() gave error: %d", socket_errno));
DBUG_RETURN(TRUE);
}
my_inet_ntoa(vio->remote.sin_addr,buf);
*port= ntohs(vio->remote.sin_port);
/* Normalize IP address. */
vio_get_normalized_ip(addr, addr_length,
(struct sockaddr *) &vio->remote, &vio->addrLen);
/* Get IP address & port number. */
err_code= vio_getnameinfo((struct sockaddr *) &vio->remote,
ip_buffer, ip_buffer_size,
port_buffer, NI_MAXSERV,
NI_NUMERICHOST | NI_NUMERICSERV);
if (err_code)
{
DBUG_PRINT("exit", ("getnameinfo() gave error: %s",
gai_strerror(err_code)));
DBUG_RETURN(TRUE);
}
*port= (uint16) strtol(port_buffer, NULL, 10);
}
DBUG_PRINT("exit", ("addr: %s", buf));
DBUG_RETURN(0);
}
/*
Get in_addr for a TCP/IP connection
SYNOPSIS
vio_in_addr()
vio vio handle
in put in_addr here
NOTES
one must call vio_peer_addr() before calling this one
*/
void vio_in_addr(Vio *vio, struct in_addr *in)
{
DBUG_ENTER("vio_in_addr");
if (vio->localhost)
bzero((char*) in, sizeof(*in));
else
*in=vio->remote.sin_addr;
DBUG_VOID_RETURN;
DBUG_PRINT("exit", ("Client IP address: %s; port: %d",
(const char *) ip_buffer,
(int) *port));
DBUG_RETURN(FALSE);
}
@ -377,7 +533,8 @@ static my_bool socket_poll_read(my_socket sd, uint timeout)
FD_ZERO(&errorfds);
FD_SET(fd, &readfds);
FD_SET(fd, &errorfds);
if ((res= select(fd, &readfds, NULL, &errorfds, &tm) <= 0))
/* The first argument is ignored on Windows, so a conversion to int is OK */
if ((res= select((int) fd, &readfds, NULL, &errorfds, &tm) <= 0))
{
DBUG_RETURN(res < 0 ? 0 : 1);
}
@ -879,3 +1036,36 @@ ssize_t vio_pending(Vio *vio)
return 0;
}
/**
This is a wrapper for the system getnameinfo(), because different OS
differ in the getnameinfo() implementation. For instance, Solaris 10
requires that the 2nd argument (salen) must match the actual size of the
struct sockaddr_storage passed to it.
*/
int vio_getnameinfo(const struct sockaddr *sa,
char *hostname, size_t hostname_size,
char *port, size_t port_size,
int flags)
{
int sa_length= 0;
switch (sa->sa_family) {
case AF_INET:
sa_length= sizeof (struct sockaddr_in);
break;
#ifdef HAVE_IPV6
case AF_INET6:
sa_length= sizeof (struct sockaddr_in6);
break;
#endif /* HAVE_IPV6 */
}
return getnameinfo(sa, sa_length,
hostname, hostname_size,
port, port_size,
flags);
}