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dirmngr: Fix HKP host selection code.
* dirmngr/server.c (cmd_keyserver): Add option --resolve and change
--print-hosttable to --hosttable.
* dirmngr/ks-action.c (ks_printf_help): New.
(ks_action_resolve): New.
* dirmngr/ks-engine-hkp.c (select_random_host): Fix selection.
(ks_hkp_print_hosttable): Print to assuan stream.
(map_host): Remove debug code. Add arg FORCE_SELECT. Return numeric
IP addr if it can't be resolved.
(make_host_part): Add arg FORCE_SELECT; change callers to pass false.
(ks_hkp_resolve): New.
--
The new options for the keyserver command are useful for debugging.
For example:
$ tools/gpg-connect-agent -S /usr/local/var/run/gnupg/S.dirmngr \
'keyserver hkp://keys.gnupg.net' \
'keyserver http://http-keys.gnupg.net' \
'keyserver --resolve --hosttable' /bye
yields:
OK
OK
S # http://astrath.net:80
S # http://2001:41d0:1:e673::1:11371
S # hosttable (idx, ipv4, ipv6, dead, name):
S # 0 http-keys.gnupg.net
S # . --> 10 11 12 1 5 8 7 4* 2 9 6 3
S # 1 4 37.250.168.245.bredband.tre.se
S # 2 4 6 keys.exosphere.de
S # 3 4 6 poseidon.muc.drweb-av.de
S # 4 4 astrath.net
S # 5 4 79.143.214.216
S # 6 4 openpgp.andrew.kvalhe.im
S # 7 4 app.aaiedu.hr
S # 8 4 6 alita.karotte.org
S # 9 4 6 keyserver.bau5net.com
S # 10 4 194.94.127.122
S # 11 6 2001:4d88:1ffc:477::7
S # 12 6 2a00:1280:8000:2:1:8:0:1
S # 13 keys.gnupg.net
S # . --> 23 28* 30 17 22 8 7 27 25 14 21 20 19 29 [...]
S # 14 4 hufu.ki.iif.hu
S # 15 4 pks.ms.mff.cuni.cz
S # 16 4 pgpkeys.co.uk
S # 17 4 80-239-156-219.customer.teliacarrier.com
S # 18 4 srv01.secure-u.de
S # 19 4 mallos.xs4all.nl
S # 20 4 kronecker.scientia.net
S # 21 4 keyserver.ut.mephi.ru
S # 22 4 89-68-150-88.dynamic.chello.pl
S # 23 6 2001:1608:21:6:84:200:66:125
S # 24 6 sks.es.net
S # 25 6 gstueve-1-pt.tunnel.tserv13.ash1.ipv6.he.net
S # 26 6 sks.mrball.net
S # 27 6 gozer.rediris.es
S # 28 6 2001:41d0:1:e673::1
S # 29 6 oteiza.siccegge.de
S # 30 6 2403:4200:401:10::13
S # 31 6 statler.serviz.fr
OK
This commit is contained in:
Werner Koch
parent
f30d8b0188
commit
3c35b46a32
5 changed files with 158 additions and 49 deletions
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@ -1,5 +1,6 @@
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/* ks-engine-hkp.c - HKP keyserver engine
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* Copyright (C) 2011, 2012 Free Software Foundation, Inc.
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* Copyright (C) 2011, 2012, 2014 Werner Koch
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*
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* This file is part of GnuPG.
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*
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@ -94,6 +95,7 @@ create_new_hostinfo (const char *name)
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hi->lastfail = (time_t)(-1);
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hi->v4 = 0;
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hi->v6 = 0;
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hi->dead = 0;
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/* Add it to the hosttable. */
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for (idx=0; idx < hosttable_size; idx++)
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@ -161,8 +163,8 @@ select_random_host (int *table)
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size_t tblsize;
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int pidx, idx;
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/* We create a new table so that we select only from currently alive
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hosts. */
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/* We create a new table so that we randomly select only from
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currently alive hosts. */
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for (idx=0, tblsize=0; (pidx = table[idx]) != -1; idx++)
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if (hosttable[pidx] && !hosttable[pidx]->dead)
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tblsize++;
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@ -179,7 +181,7 @@ select_random_host (int *table)
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if (tblsize == 1) /* Save a get_uint_nonce. */
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pidx = tbl[0];
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else
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pidx = get_uint_nonce () % tblsize;
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pidx = tbl[get_uint_nonce () % tblsize];
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xfree (tbl);
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return pidx;
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@ -190,9 +192,10 @@ select_random_host (int *table)
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allows us to manage round robin DNS names. We use our own strategy
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to choose one of the hosts. For example we skip those hosts which
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failed for some time and we stick to one host for a time
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independent of DNS retry times. */
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independent of DNS retry times. If FORCE_RESELECT is true a new
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host is always selected. */
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static char *
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map_host (const char *name)
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map_host (const char *name, int force_reselect)
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{
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hostinfo_t hi;
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int idx;
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@ -241,12 +244,13 @@ map_host (const char *name)
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if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
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continue;
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log_printhex ("getaddrinfo returned", ai->ai_addr,ai->ai_addrlen);
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if ((ec=getnameinfo (ai->ai_addr, ai->ai_addrlen,
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tmphost, sizeof tmphost,
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NULL, 0, NI_NAMEREQD)))
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log_info ("getnameinfo failed while checking '%s': %s\n",
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name, gai_strerror (ec));
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NULL, 0, 0)))
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{
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log_info ("getnameinfo failed while checking '%s': %s\n",
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name, gai_strerror (ec));
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}
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else if (refidx+1 >= reftblsize)
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{
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log_error ("getnameinfo returned for '%s': '%s'"
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@ -266,7 +270,7 @@ map_host (const char *name)
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for (i=0; i < refidx; i++)
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if (reftbl[i] == tmpidx)
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break;
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break;
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if (!(i < refidx) && tmpidx != idx)
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reftbl[refidx++] = tmpidx;
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}
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@ -319,8 +323,10 @@ map_host (const char *name)
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{
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/* If the currently selected host is now marked dead, force a
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re-selection . */
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if (hi->poolidx >= 0 && hi->poolidx < hosttable_size
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&& hosttable[hi->poolidx] && hosttable[hi->poolidx]->dead)
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if (force_reselect)
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hi->poolidx = -1;
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else if (hi->poolidx >= 0 && hi->poolidx < hosttable_size
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&& hosttable[hi->poolidx] && hosttable[hi->poolidx]->dead)
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hi->poolidx = -1;
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/* Select a host if needed. */
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@ -369,33 +375,48 @@ mark_host_dead (const char *name)
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/* Debug function to print the entire hosttable. */
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void
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ks_hkp_print_hosttable (void)
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gpg_error_t
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ks_hkp_print_hosttable (ctrl_t ctrl)
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{
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gpg_error_t err;
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int idx, idx2;
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hostinfo_t hi;
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membuf_t mb;
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char *p;
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err = ks_print_help (ctrl, "hosttable (idx, ipv4, ipv6, dead, name):");
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if (err)
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return err;
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for (idx=0; idx < hosttable_size; idx++)
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if ((hi=hosttable[idx]))
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{
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log_info ("hosttable %3d %s %s %s %s\n",
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idx, hi->v4? "4":" ", hi->v6? "6":" ",
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hi->dead? "d":" ", hi->name);
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err = ks_printf_help (ctrl, "%3d %s %s %s %s\n",
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idx, hi->v4? "4":" ", hi->v6? "6":" ",
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hi->dead? "d":" ", hi->name);
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if (err)
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return err;
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if (hi->pool)
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{
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log_info (" -->");
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init_membuf (&mb, 256);
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put_membuf_printf (&mb, " . -->");
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for (idx2=0; hi->pool[idx2] != -1; idx2++)
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{
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log_printf (" %d", hi->pool[idx2]);
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if (hi->poolidx == idx2)
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log_printf ("*");
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put_membuf_printf (&mb, " %d", hi->pool[idx2]);
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if (hi->poolidx == hi->pool[idx2])
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put_membuf_printf (&mb, "*");
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}
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log_printf ("\n");
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/* for (idx2=0; hi->pool[idx2] != -1; idx2++) */
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/* log_info (" (%s)\n", */
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/* hosttable[hi->pool[idx2]]->name); */
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put_membuf( &mb, "", 1);
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p = get_membuf (&mb, NULL);
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if (!p)
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return gpg_error_from_syserror ();
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err = ks_print_help (ctrl, p);
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xfree (p);
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if (err)
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return err;
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}
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}
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return 0;
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}
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@ -425,7 +446,8 @@ ks_hkp_help (ctrl_t ctrl, parsed_uri_t uri)
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PORT. Returns an allocated string or NULL on failure and sets
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ERRNO. */
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static char *
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make_host_part (const char *scheme, const char *host, unsigned short port)
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make_host_part (const char *scheme, const char *host, unsigned short port,
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int force_reselect)
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{
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char portstr[10];
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char *hostname;
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@ -449,7 +471,7 @@ make_host_part (const char *scheme, const char *host, unsigned short port)
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/*fixme_do_srv_lookup ()*/
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}
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hostname = map_host (host);
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hostname = map_host (host, force_reselect);
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if (!hostname)
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return NULL;
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@ -459,6 +481,32 @@ make_host_part (const char *scheme, const char *host, unsigned short port)
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}
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/* Resolve all known keyserver names and update the hosttable. This
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is mainly useful for debugging because the resolving is anyway done
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on demand. */
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gpg_error_t
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ks_hkp_resolve (ctrl_t ctrl, parsed_uri_t uri)
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{
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gpg_error_t err;
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char *hostport = NULL;
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hostport = make_host_part (uri->scheme, uri->host, uri->port, 1);
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if (!hostport)
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{
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err = gpg_error_from_syserror ();
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err = ks_printf_help (ctrl, "%s://%s:%hu: resolve failed: %s",
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uri->scheme, uri->host, uri->port,
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gpg_strerror (err));
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}
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else
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{
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err = ks_printf_help (ctrl, "%s", hostport);
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xfree (hostport);
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}
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return err;
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}
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/* Send an HTTP request. On success returns an estream object at
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R_FP. HOSTPORTSTR is only used for diagnostics. If POST_CB is not
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NULL a post request is used and that callback is called to allow
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@ -636,7 +684,6 @@ armor_data (char **r_string, const void *data, size_t datalen)
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}
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/* Search the keyserver identified by URI for keys matching PATTERN.
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On success R_FP has an open stream to read the data. */
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@ -694,7 +741,7 @@ ks_hkp_search (ctrl_t ctrl, parsed_uri_t uri, const char *pattern,
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{
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char *searchkey;
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hostport = make_host_part (uri->scheme, uri->host, uri->port);
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hostport = make_host_part (uri->scheme, uri->host, uri->port, 0);
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if (!hostport)
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{
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err = gpg_error_from_syserror ();
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@ -725,7 +772,7 @@ ks_hkp_search (ctrl_t ctrl, parsed_uri_t uri, const char *pattern,
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if (err)
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goto leave;
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/* Start reading the response. */
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/* Peek at the response. */
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{
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int c = es_getc (fp);
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if (c == -1)
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@ -736,8 +783,8 @@ ks_hkp_search (ctrl_t ctrl, parsed_uri_t uri, const char *pattern,
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}
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if (c == '<')
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{
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/* The document begins with a '<', assume it's a HTML
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response, which we don't support. */
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/* The document begins with a '<': Assume a HTML response,
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which we don't support. */
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err = gpg_error (GPG_ERR_UNSUPPORTED_ENCODING);
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goto leave;
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}
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@ -800,7 +847,7 @@ ks_hkp_get (ctrl_t ctrl, parsed_uri_t uri, const char *keyspec, estream_t *r_fp)
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}
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/* Build the request string. */
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hostport = make_host_part (uri->scheme, uri->host, uri->port);
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hostport = make_host_part (uri->scheme, uri->host, uri->port, 0);
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if (!hostport)
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{
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err = gpg_error_from_syserror ();
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@ -892,7 +939,7 @@ ks_hkp_put (ctrl_t ctrl, parsed_uri_t uri, const void *data, size_t datalen)
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armored = NULL;
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/* Build the request string. */
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hostport = make_host_part (uri->scheme, uri->host, uri->port);
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hostport = make_host_part (uri->scheme, uri->host, uri->port, 0);
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if (!hostport)
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{
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err = gpg_error_from_syserror ();
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