From: Tom Lane <tgl@sss.pgh.pa.us> Date: Thu, 17 May 2007 23:31:49 +0000 (+0000) Subject: Temporary fix for the problem that pg_stat_activity, inet_client_addr(), X-Git-Tag: REL8_3_BETA1~669 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=dbb769352d89323670d28585cf2af52dd520d378;p=postgresql Temporary fix for the problem that pg_stat_activity, inet_client_addr(), and inet_server_addr() fail if the client connected over a "scoped" IPv6 address. In this case getnameinfo() will return a string ending with a poorly-standardized "%something" zone specifier, which these functions try to feed to network_in(), which won't take it. So that we don't lose functionality altogether, suppress the zone specifier before giving the string to network_in(). Per report from Brian Hirt. TODO: probably someday the inet type should support scoped IPv6 addresses, and then this patch should be reverted. Backpatch to 8.2 ... is it worth going further? --- diff --git a/src/backend/utils/adt/network.c b/src/backend/utils/adt/network.c index c1dadfbcc1..7a190719b8 100644 --- a/src/backend/utils/adt/network.c +++ b/src/backend/utils/adt/network.c @@ -1,7 +1,7 @@ /* * PostgreSQL type definitions for the INET and CIDR types. * - * $PostgreSQL: pgsql/src/backend/utils/adt/network.c,v 1.69 2007/04/06 04:21:43 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/network.c,v 1.70 2007/05/17 23:31:49 tgl Exp $ * * Jon Postel RIP 16 Oct 1998 */ @@ -1142,6 +1142,8 @@ inet_client_addr(PG_FUNCTION_ARGS) if (ret) PG_RETURN_NULL(); + clean_ipv6_addr(port->raddr.addr.ss_family, remote_host); + PG_RETURN_INET_P(network_in(remote_host, false)); } @@ -1216,6 +1218,8 @@ inet_server_addr(PG_FUNCTION_ARGS) if (ret) PG_RETURN_NULL(); + clean_ipv6_addr(port->laddr.addr.ss_family, local_host); + PG_RETURN_INET_P(network_in(local_host, false)); } @@ -1479,3 +1483,32 @@ inetmi(PG_FUNCTION_ARGS) PG_RETURN_INT64(res); } + + +/* + * clean_ipv6_addr --- remove any '%zone' part from an IPv6 address string + * + * XXX This should go away someday! + * + * This is a kluge needed because we don't yet support zones in stored inet + * values. Since the result of getnameinfo() might include a zone spec, + * call this to remove it anywhere we want to feed getnameinfo's output to + * network_in. Beats failing entirely. + * + * An alternative approach would be to let network_in ignore %-parts for + * itself, but that would mean we'd silently drop zone specs in user input, + * which seems not such a good idea. + */ +void +clean_ipv6_addr(int addr_family, char *addr) +{ +#ifdef HAVE_IPV6 + if (addr_family == AF_INET6) + { + char *pct = strchr(addr, '%'); + + if (pct) + *pct = '\0'; + } +#endif +} diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c index f30e57ec2c..4f2eb287dc 100644 --- a/src/backend/utils/adt/pgstatfuncs.c +++ b/src/backend/utils/adt/pgstatfuncs.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.41 2007/03/30 18:34:55 mha Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.42 2007/05/17 23:31:49 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -550,6 +550,8 @@ pg_stat_get_backend_client_addr(PG_FUNCTION_ARGS) if (ret) PG_RETURN_NULL(); + clean_ipv6_addr(beentry->st_clientaddr.addr.ss_family, remote_host); + PG_RETURN_INET_P(DirectFunctionCall1(inet_in, CStringGetDatum(remote_host))); } diff --git a/src/include/utils/builtins.h b/src/include/utils/builtins.h index 22b10841c6..ec5b9720da 100644 --- a/src/include/utils/builtins.h +++ b/src/include/utils/builtins.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.292 2007/05/08 18:56:48 neilc Exp $ + * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.293 2007/05/17 23:31:49 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -797,6 +797,7 @@ extern Datum inetor(PG_FUNCTION_ARGS); extern Datum inetpl(PG_FUNCTION_ARGS); extern Datum inetmi_int8(PG_FUNCTION_ARGS); extern Datum inetmi(PG_FUNCTION_ARGS); +extern void clean_ipv6_addr(int addr_family, char *addr); /* mac.c */ extern Datum macaddr_in(PG_FUNCTION_ARGS);