mirror of git://git.gnupg.org/gnupg.git
keyserver: Improve support for hkps pools.
* dirmngr/ks-engine-hkp.c (hostinfo_s): Add fields cname, v4addr, and v6addr. (create_new_hostinfo): Clear them. (my_getnameinfo): Add args numeric and r_isnumeric. (is_ip_address): New. (map_host): Add arg r_host. Rewrite the code to handle pools in a special way. (ks_hkp_print_hosttable): Change format of help info output. (make_host_part): Add arg optional r_httphost. (send_request): Add arg httphost. (ks_hkp_search, ks_hkp_get, ks_hkp_put): Get httphost and pass it to send_request. -- This changes quite some things on how the hostinfo is maintained. However, it might be better to rework the data structures and have one entry per IP address instead of this clumsy patch.
This commit is contained in:
Werner Koch
parent
8b90d79818
commit
d2d9d4fb60
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@ -69,12 +69,20 @@ struct hostinfo_s
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int *pool; /* A -1 terminated array with indices into
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HOSTTABLE or NULL if NAME is not a pool
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name. */
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int poolidx; /* Index into POOL with the used host. */
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int poolidx; /* Index into POOL with the used host. -1 if not set. */
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unsigned int v4:1; /* Host supports AF_INET. */
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unsigned int v6:1; /* Host supports AF_INET6. */
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unsigned int dead:1; /* Host is currently unresponsive. */
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time_t died_at; /* The time the host was marked dead. IF this is
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time_t died_at; /* The time the host was marked dead. If this is
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0 the host has been manually marked dead. */
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char *cname; /* Canonical name of the host. Only set if this
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is a pool. */
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char *v4addr; /* A string with the v4 IP address of the host.
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NULL if NAME has a numeric IP address or no v4
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address is available. */
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char *v6addr; /* A string with the v6 IP address of the host.
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NULL if NAME has a numeric IP address or no v4
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address is available. */
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char name[1]; /* The hostname. */
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};
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@ -110,6 +118,9 @@ create_new_hostinfo (const char *name)
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hi->v6 = 0;
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hi->dead = 0;
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hi->died_at = 0;
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hi->cname = NULL;
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hi->v4addr = NULL;
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hi->v6addr = NULL;
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/* Add it to the hosttable. */
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for (idx=0; idx < hosttable_size; idx++)
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@ -217,19 +228,28 @@ select_random_host (int *table)
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/* Simplified version of getnameinfo which also returns a numeric
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hostname inside of brackets. The caller should provide a buffer
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for TMPHOST which is 2 bytes larger than the the largest hostname.
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returns 0 on success or an EAI error code. */
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for HOST which is 2 bytes larger than the largest hostname. If
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NUMERIC is true the returned value is numeric IP address. Returns
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0 on success or an EAI error code. True is stored at R_ISNUMERIC
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if HOST has a numeric IP address. */
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static int
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my_getnameinfo (struct addrinfo *ai, char *host, size_t hostlen)
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my_getnameinfo (struct addrinfo *ai, char *host, size_t hostlen,
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int numeric, int *r_isnumeric)
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{
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int ec;
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char *p;
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*r_isnumeric = 0;
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if (hostlen < 5)
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return EAI_OVERFLOW;
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ec = getnameinfo (ai->ai_addr, ai->ai_addrlen,
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host, hostlen, NULL, 0, NI_NAMEREQD);
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if (numeric)
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ec = EAI_NONAME;
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else
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ec = getnameinfo (ai->ai_addr, ai->ai_addrlen,
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host, hostlen, NULL, 0, NI_NAMEREQD);
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if (!ec && *host == '[')
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ec = EAI_FAIL; /* A name may never start with a bracket. */
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else if (ec == EAI_NONAME)
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@ -244,28 +264,66 @@ my_getnameinfo (struct addrinfo *ai, char *host, size_t hostlen)
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p, hostlen, NULL, 0, NI_NUMERICHOST);
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if (!ec && ai->ai_family == AF_INET6)
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strcat (host, "]");
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*r_isnumeric = 1;
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}
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return ec;
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}
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/* Check whether NAME is an IP address. */
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static int
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is_ip_address (const char *name)
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{
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int ndots, n;
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if (*name == '[')
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return 1;
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/* Check whether it is legacy IP address. */
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if (*name == '.')
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return 0; /* No. */
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ndots = n = 0;
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for (; *name; name++)
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{
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if (*name == '.')
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{
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if (name[1] == '.')
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return 0; /* No. */
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if (atoi (name+1) > 255)
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return 0; /* Value too large. */
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ndots++;
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n = 0;
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}
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else if (!strchr ("012345678", *name))
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return 0; /* Not a digit. */
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else if (++n > 3)
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return 0; /* More than 3 digits. */
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}
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return !!(ndots == 3);
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}
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/* Map the host name NAME to the actual to be used host name. This
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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. If FORCE_RESELECT is true a new
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host is always selected. If R_HTTPFLAGS is not NULL if will
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received flags which are to be passed to http_open. */
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receive flags which are to be passed to http_open. If R_HOST is
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not NULL a malloced name of the pool is stored or NULL if it is not
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a pool. */
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static char *
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map_host (ctrl_t ctrl, const char *name, int force_reselect,
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unsigned int *r_httpflags)
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unsigned int *r_httpflags, char **r_host)
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{
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hostinfo_t hi;
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int idx;
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if (r_httpflags)
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*r_httpflags = 0;
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if (r_host)
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*r_host = NULL;
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/* No hostname means localhost. */
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if (!name || !*name)
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@ -280,6 +338,7 @@ map_host (ctrl_t ctrl, const char *name, int force_reselect,
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int *reftbl;
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size_t reftblsize;
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int refidx;
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int is_pool = 0;
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reftblsize = 100;
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reftbl = xtrymalloc (reftblsize * sizeof *reftbl);
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@ -298,13 +357,40 @@ map_host (ctrl_t ctrl, const char *name, int force_reselect,
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/* Find all A records for this entry and put them into the pool
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list - if any. */
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memset (&hints, 0, sizeof (hints));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_CANONNAME;
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/* We can't use the the AI_IDN flag because that does the
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conversion using the current locale. However, GnuPG always
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used UTF-8. To support IDN we would need to make use of the
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libidn API. */
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if (!getaddrinfo (name, NULL, &hints, &aibuf))
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{
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int n_v6, n_v4;
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/* First figure out whether this is a pool. For a pool we
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use a different strategy than for a plains erver: We use
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the canonical name of the pool as the virtual host along
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with the IP addresses. If it is not a pool, we use the
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specified name. */
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n_v6 = n_v4 = 0;
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for (ai = aibuf; ai; ai = ai->ai_next)
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{
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char tmphost[NI_MAXHOST];
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if (ai->ai_family != AF_INET6)
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n_v6++;
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else if (ai->ai_family != AF_INET)
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n_v4++;
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}
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if (n_v6 > 1 || n_v4 > 1)
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is_pool = 1;
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if (is_pool && aibuf->ai_canonname)
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hi->cname = xtrystrdup (aibuf->ai_canonname);
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for (ai = aibuf; ai; ai = ai->ai_next)
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{
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char tmphost[NI_MAXHOST + 2];
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int tmpidx;
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int is_numeric;
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int ec;
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int i;
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@ -312,7 +398,28 @@ map_host (ctrl_t ctrl, const char *name, int force_reselect,
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continue;
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dirmngr_tick (ctrl);
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if ((ec = my_getnameinfo (ai, tmphost, sizeof tmphost)))
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if (!is_pool && !is_ip_address (name))
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{
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/* This is a hostname but not a pool. Use the name
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as given without going through getnameinfo. */
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if (strlen (name)+1 > sizeof tmphost)
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{
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ec = EAI_SYSTEM;
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gpg_err_set_errno (EINVAL);
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}
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else
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{
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ec = 0;
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strcpy (tmphost, name);
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}
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is_numeric = 0;
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}
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else
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ec = my_getnameinfo (ai, tmphost, sizeof tmphost,
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0, &is_numeric);
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if (ec)
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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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@ -324,15 +431,49 @@ map_host (ctrl_t ctrl, const char *name, int force_reselect,
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}
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else
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{
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tmpidx = find_hostinfo (tmphost);
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log_info ("getnameinfo returned for '%s': '%s'%s\n",
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name, tmphost,
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tmpidx == -1? "" : " [already known]");
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if ((tmpidx = find_hostinfo (tmphost)) != -1)
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if (tmpidx == -1) /* Create a new entry. */
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tmpidx = create_new_hostinfo (tmphost);
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if (tmpidx == -1)
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{
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log_info ("getnameinfo returned for '%s': '%s'"
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" [already known]\n", name, tmphost);
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if (ai->ai_family == AF_INET)
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hosttable[tmpidx]->v4 = 1;
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log_error ("map_host for '%s' problem: %s - '%s'"
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" [ignored]\n",
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name, strerror (errno), tmphost);
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}
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else /* Set or update the entry. */
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{
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char *ipaddr = NULL;
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if (!is_numeric)
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{
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ec = my_getnameinfo (ai, tmphost, sizeof tmphost,
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1, &is_numeric);
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if (!ec && !(ipaddr = xtrystrdup (tmphost)))
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ec = EAI_SYSTEM;
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if (ec)
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log_info ("getnameinfo failed: %s\n",
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gai_strerror (ec));
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}
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if (ai->ai_family == AF_INET6)
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hosttable[tmpidx]->v6 = 1;
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{
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hosttable[tmpidx]->v6 = 1;
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xfree (hosttable[tmpidx]->v6addr);
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hosttable[tmpidx]->v6addr = ipaddr;
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}
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else if (ai->ai_family == AF_INET)
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{
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hosttable[tmpidx]->v4 = 1;
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xfree (hosttable[tmpidx]->v4addr);
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hosttable[tmpidx]->v4addr = ipaddr;
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}
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else
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BUG ();
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for (i=0; i < refidx; i++)
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if (reftbl[i] == tmpidx)
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@ -340,35 +481,12 @@ map_host (ctrl_t ctrl, const char *name, int force_reselect,
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if (!(i < refidx) && tmpidx != idx)
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reftbl[refidx++] = tmpidx;
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}
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else
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{
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log_info ("getnameinfo returned for '%s': '%s'\n",
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name, tmphost);
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/* Create a new entry. */
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tmpidx = create_new_hostinfo (tmphost);
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if (tmpidx == -1)
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log_error ("map_host for '%s' problem: %s - '%s'"
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" [ignored]\n",
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name, strerror (errno), tmphost);
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else
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{
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if (ai->ai_family == AF_INET)
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hosttable[tmpidx]->v4 = 1;
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if (ai->ai_family == AF_INET6)
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hosttable[tmpidx]->v6 = 1;
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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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if (!(i < refidx) && tmpidx != idx)
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reftbl[refidx++] = tmpidx;
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}
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}
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}
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}
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freeaddrinfo (aibuf);
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}
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reftbl[refidx] = -1;
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if (refidx)
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if (refidx && is_pool)
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{
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assert (!hi->pool);
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hi->pool = xtryrealloc (reftbl, (refidx+1) * sizeof *reftbl);
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@ -423,12 +541,16 @@ map_host (ctrl_t ctrl, const char *name, int force_reselect,
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supports IPv<N>, we explicit set the corresponding http
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flags. The reason for this is that a host might be listed in
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a pool as not v6 only but actually support v6 when later
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resolved the name is resolved by our http layer. */
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the name is resolved by our http layer. */
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if (!hi->v4)
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*r_httpflags |= HTTP_FLAG_IGNORE_IPv4;
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if (!hi->v6)
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*r_httpflags |= HTTP_FLAG_IGNORE_IPv6;
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}
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if (r_host && hi->pool && hi->cname)
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*r_host = xtrystrdup (hi->cname);
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return xtrystrdup (hi->name);
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}
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@ -571,7 +693,7 @@ ks_hkp_print_hosttable (ctrl_t ctrl)
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char *p, *died;
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const char *diedstr;
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err = ks_print_help (ctrl, "hosttable (idx, ipv4, ipv6, dead, name, time):");
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err = ks_print_help (ctrl, "hosttable (idx, ipv6, ipv4, dead, name, time):");
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if (err)
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return err;
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@ -586,16 +708,26 @@ ks_hkp_print_hosttable (ctrl_t ctrl)
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}
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else
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diedstr = died = NULL;
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err = ks_printf_help (ctrl, "%3d %s %s %s %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%s%s%s%s%s%s%s\n",
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idx, hi->v6? "6":" ", hi->v4? "4":" ",
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hi->dead? "d":" ",
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hi->name,
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hi->v6addr? " v6=":"",
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hi->v6addr? hi->v6addr:"",
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hi->v4addr? " v4=":"",
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hi->v4addr? hi->v4addr:"",
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diedstr? " (":"",
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diedstr? diedstr:"",
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diedstr? ")":"" );
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xfree (died);
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if (err)
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return err;
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if (hi->cname)
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err = ks_printf_help (ctrl, " . %s", hi->cname);
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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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init_membuf (&mb, 256);
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@ -644,13 +776,15 @@ ks_hkp_help (ctrl_t ctrl, parsed_uri_t uri)
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}
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/* Build the remote part or the URL from SCHEME, HOST and an optional
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/* Build the remote part of the URL from SCHEME, HOST and an optional
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PORT. Returns an allocated string or NULL on failure and sets
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ERRNO. */
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ERRNO. If R_HTTPHOST is not NULL it receive a mallcoed string with
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the poolname. */
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static char *
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make_host_part (ctrl_t ctrl,
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const char *scheme, const char *host, unsigned short port,
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int force_reselect, unsigned int *r_httpflags)
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int force_reselect,
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unsigned int *r_httpflags, char **r_httphost)
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{
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char portstr[10];
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char *hostname;
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@ -674,7 +808,7 @@ make_host_part (ctrl_t ctrl,
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/*fixme_do_srv_lookup ()*/
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}
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hostname = map_host (ctrl, host, force_reselect, r_httpflags);
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hostname = map_host (ctrl, host, force_reselect, r_httpflags, r_httphost);
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if (!hostname)
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return NULL;
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@ -693,7 +827,8 @@ ks_hkp_resolve (ctrl_t ctrl, parsed_uri_t uri)
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gpg_error_t err;
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char *hostport = NULL;
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hostport = make_host_part (ctrl, uri->scheme, uri->host, uri->port, 1, NULL);
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hostport = make_host_part (ctrl, uri->scheme, uri->host, uri->port, 1,
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NULL, NULL);
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if (!hostport)
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{
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err = gpg_error_from_syserror ();
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@ -739,12 +874,13 @@ ks_hkp_housekeeping (time_t curtime)
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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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R_FP. HOSTPORTSTR is only used for diagnostics. If HTTPHOST is
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not NULL it will be used as HTTP "Host" header. 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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writing the post data. */
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static gpg_error_t
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send_request (ctrl_t ctrl, const char *request, const char *hostportstr,
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unsigned int httpflags,
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const char *httphost, unsigned int httpflags,
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gpg_error_t (*post_cb)(void *, http_t), void *post_cb_value,
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estream_t *r_fp)
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{
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@ -765,7 +901,7 @@ send_request (ctrl_t ctrl, const char *request, const char *hostportstr,
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err = http_open (&http,
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post_cb? HTTP_REQ_POST : HTTP_REQ_GET,
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request,
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NULL,
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httphost,
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/* fixme: AUTH */ NULL,
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httpflags,
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/* fixme: proxy*/ NULL,
|
||||
|
|
@ -987,6 +1123,7 @@ ks_hkp_search (ctrl_t ctrl, parsed_uri_t uri, const char *pattern,
|
|||
estream_t fp = NULL;
|
||||
int reselect;
|
||||
unsigned int httpflags;
|
||||
char *httphost = NULL;
|
||||
unsigned int tries = SEND_REQUEST_RETRIES;
|
||||
|
||||
*r_fp = NULL;
|
||||
|
|
@ -1035,8 +1172,9 @@ ks_hkp_search (ctrl_t ctrl, parsed_uri_t uri, const char *pattern,
|
|||
char *searchkey;
|
||||
|
||||
xfree (hostport);
|
||||
xfree (httphost); httphost = NULL;
|
||||
hostport = make_host_part (ctrl, uri->scheme, uri->host, uri->port,
|
||||
reselect, &httpflags);
|
||||
reselect, &httpflags, &httphost);
|
||||
if (!hostport)
|
||||
{
|
||||
err = gpg_error_from_syserror ();
|
||||
|
|
@ -1064,7 +1202,8 @@ ks_hkp_search (ctrl_t ctrl, parsed_uri_t uri, const char *pattern,
|
|||
}
|
||||
|
||||
/* Send the request. */
|
||||
err = send_request (ctrl, request, hostport, httpflags, NULL, NULL, &fp);
|
||||
err = send_request (ctrl, request, hostport, httphost, httpflags,
|
||||
NULL, NULL, &fp);
|
||||
if (handle_send_request_error (err, request, &tries))
|
||||
{
|
||||
reselect = 1;
|
||||
|
|
@ -1104,6 +1243,7 @@ ks_hkp_search (ctrl_t ctrl, parsed_uri_t uri, const char *pattern,
|
|||
es_fclose (fp);
|
||||
xfree (request);
|
||||
xfree (hostport);
|
||||
xfree (httphost);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
@ -1123,6 +1263,7 @@ ks_hkp_get (ctrl_t ctrl, parsed_uri_t uri, const char *keyspec, estream_t *r_fp)
|
|||
char *request = NULL;
|
||||
estream_t fp = NULL;
|
||||
int reselect;
|
||||
char *httphost = NULL;
|
||||
unsigned int httpflags;
|
||||
unsigned int tries = SEND_REQUEST_RETRIES;
|
||||
|
||||
|
|
@ -1174,8 +1315,9 @@ ks_hkp_get (ctrl_t ctrl, parsed_uri_t uri, const char *keyspec, estream_t *r_fp)
|
|||
again:
|
||||
/* Build the request string. */
|
||||
xfree (hostport);
|
||||
xfree (httphost); httphost = NULL;
|
||||
hostport = make_host_part (ctrl, uri->scheme, uri->host, uri->port,
|
||||
reselect, &httpflags);
|
||||
reselect, &httpflags, &httphost);
|
||||
if (!hostport)
|
||||
{
|
||||
err = gpg_error_from_syserror ();
|
||||
|
|
@ -1195,7 +1337,8 @@ ks_hkp_get (ctrl_t ctrl, parsed_uri_t uri, const char *keyspec, estream_t *r_fp)
|
|||
}
|
||||
|
||||
/* Send the request. */
|
||||
err = send_request (ctrl, request, hostport, httpflags, NULL, NULL, &fp);
|
||||
err = send_request (ctrl, request, hostport, httphost, httpflags,
|
||||
NULL, NULL, &fp);
|
||||
if (handle_send_request_error (err, request, &tries))
|
||||
{
|
||||
reselect = 1;
|
||||
|
|
@ -1216,6 +1359,7 @@ ks_hkp_get (ctrl_t ctrl, parsed_uri_t uri, const char *keyspec, estream_t *r_fp)
|
|||
es_fclose (fp);
|
||||
xfree (request);
|
||||
xfree (hostport);
|
||||
xfree (httphost);
|
||||
xfree (searchkey);
|
||||
return err;
|
||||
}
|
||||
|
|
@ -1263,6 +1407,7 @@ ks_hkp_put (ctrl_t ctrl, parsed_uri_t uri, const void *data, size_t datalen)
|
|||
struct put_post_parm_s parm;
|
||||
char *armored = NULL;
|
||||
int reselect;
|
||||
char *httphost = NULL;
|
||||
unsigned int httpflags;
|
||||
unsigned int tries = SEND_REQUEST_RETRIES;
|
||||
|
||||
|
|
@ -1285,8 +1430,9 @@ ks_hkp_put (ctrl_t ctrl, parsed_uri_t uri, const void *data, size_t datalen)
|
|||
reselect = 0;
|
||||
again:
|
||||
xfree (hostport);
|
||||
xfree (httphost); httphost = NULL;
|
||||
hostport = make_host_part (ctrl, uri->scheme, uri->host, uri->port,
|
||||
reselect, &httpflags);
|
||||
reselect, &httpflags, &httphost);
|
||||
if (!hostport)
|
||||
{
|
||||
err = gpg_error_from_syserror ();
|
||||
|
|
@ -1302,7 +1448,8 @@ ks_hkp_put (ctrl_t ctrl, parsed_uri_t uri, const void *data, size_t datalen)
|
|||
}
|
||||
|
||||
/* Send the request. */
|
||||
err = send_request (ctrl, request, hostport, 0, put_post_cb, &parm, &fp);
|
||||
err = send_request (ctrl, request, hostport, httphost, 0,
|
||||
put_post_cb, &parm, &fp);
|
||||
if (handle_send_request_error (err, request, &tries))
|
||||
{
|
||||
reselect = 1;
|
||||
|
|
@ -1317,5 +1464,6 @@ ks_hkp_put (ctrl_t ctrl, parsed_uri_t uri, const void *data, size_t datalen)
|
|||
xfree (armored);
|
||||
xfree (request);
|
||||
xfree (hostport);
|
||||
xfree (httphost);
|
||||
return err;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue