/*
- * "$Id: http-addrlist.c 6649 2007-07-11 21:46:42Z mike $"
+ * "$Id$"
*
- * HTTP address list routines for the Common UNIX Printing System (CUPS).
+ * HTTP address list routines for CUPS.
*
- * Copyright 2007-2008 by Apple Inc.
- * Copyright 1997-2007 by Easy Software Products, all rights reserved.
+ * Copyright 2007-2013 by Apple Inc.
+ * Copyright 1997-2007 by Easy Software Products, all rights reserved.
*
- * These coded instructions, statements, and computer programs are the
- * property of Apple Inc. and are protected by Federal copyright
- * law. Distribution and use rights are outlined in the file "LICENSE.txt"
- * which should have been included with this file. If this file is
- * file is missing or damaged, see the license at "http://www.cups.org/".
- *
- * Contents:
- *
- * httpAddrConnect() - Connect to any of the addresses in the list.
- * httpAddrFreeList() - Free an address list.
- * httpAddrGetList() - Get a list of addresses for a hostname.
+ * These coded instructions, statements, and computer programs are the
+ * property of Apple Inc. and are protected by Federal copyright
+ * law. Distribution and use rights are outlined in the file "LICENSE.txt"
+ * which should have been included with this file. If this file is
+ * file is missing or damaged, see the license at "http://www.cups.org/".
*/
/*
* Include necessary headers...
*/
-#include "http-private.h"
-#include "globals.h"
-#include "debug.h"
-#include <stdlib.h>
+#include "cups-private.h"
+#ifdef HAVE_RESOLV_H
+# include <resolv.h>
+#endif /* HAVE_RESOLV_H */
+#ifdef HAVE_POLL
+# include <poll.h>
+#endif /* HAVE_POLL */
+#ifndef WIN32
+# include <fcntl.h>
+#endif /* WIN32 */
/*
* 'httpAddrConnect()' - Connect to any of the addresses in the list.
*
- * @since CUPS 1.2@
+ * @since CUPS 1.2/OS X 10.5@
*/
http_addrlist_t * /* O - Connected address or NULL on failure */
http_addrlist_t *addrlist, /* I - List of potential addresses */
int *sock) /* O - Socket */
{
- int val; /* Socket option value */
+ DEBUG_printf(("httpAddrConnect(addrlist=%p, sock=%p)", addrlist, sock));
+
+ return (httpAddrConnect2(addrlist, sock, 30000, NULL));
+}
+
+
+/*
+ * 'httpAddrConnect2()' - Connect to any of the addresses in the list with a
+ * timeout and optional cancel.
+ *
+ * @since CUPS 1.7/OS X 10.9@
+ */
+
+http_addrlist_t * /* O - Connected address or NULL on failure */
+httpAddrConnect2(
+ http_addrlist_t *addrlist, /* I - List of potential addresses */
+ int *sock, /* O - Socket */
+ int msec, /* I - Timeout in milliseconds */
+ int *cancel) /* I - Pointer to "cancel" variable */
+{
+ int val; /* Socket option value */
+#ifdef O_NONBLOCK
+ socklen_t len; /* Length of value */
+ http_addr_t peer; /* Peer address */
+ int flags, /* Socket flags */
+ remaining; /* Remaining timeout */
+# ifdef HAVE_POLL
+ struct pollfd pfd; /* Polled file descriptor */
+# else
+ fd_set input_set, /* select() input set */
+ output_set; /* select() output set */
+ struct timeval timeout; /* Timeout */
+# endif /* HAVE_POLL */
+ int nfds; /* Result from select()/poll() */
+#endif /* O_NONBLOCK */
+#ifdef DEBUG
+ char temp[256]; /* Temporary address string */
+#endif /* DEBUG */
+ DEBUG_printf(("httpAddrConnect2(addrlist=%p, sock=%p, msec=%d, cancel=%p)",
+ addrlist, sock, msec, cancel));
+
+ if (!sock)
+ {
+ errno = EINVAL;
+ _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
+ return (NULL);
+ }
+
+ if (cancel && *cancel)
+ return (NULL);
+
+ if (msec <= 0 || getenv("CUPS_DISABLE_ASYNC_CONNECT"))
+ msec = INT_MAX;
+
/*
* Loop through each address until we connect or run out of addresses...
*/
while (addrlist)
{
+ if (cancel && *cancel)
+ return (NULL);
+
/*
* Create the socket...
*/
- if ((*sock = (int)socket(addrlist->addr.addr.sa_family, SOCK_STREAM, 0)) < 0)
+ DEBUG_printf(("2httpAddrConnect2: Trying %s:%d...",
+ httpAddrString(&(addrlist->addr), temp, sizeof(temp)),
+ httpAddrPort(&(addrlist->addr))));
+
+ if ((*sock = (int)socket(httpAddrFamily(&(addrlist->addr)), SOCK_STREAM,
+ 0)) < 0)
{
/*
* Don't abort yet, as this could just be an issue with the local
*/
val = 1;
-#ifdef WIN32
- setsockopt(*sock, SOL_SOCKET, SO_REUSEADDR, (const char *)&val,
- sizeof(val));
-#else
- setsockopt(*sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
-#endif /* WIN32 */
+ setsockopt(*sock, SOL_SOCKET, SO_REUSEADDR, CUPS_SOCAST &val, sizeof(val));
#ifdef SO_REUSEPORT
val = 1;
- setsockopt(*sock, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val));
+ setsockopt(*sock, SOL_SOCKET, SO_REUSEPORT, CUPS_SOCAST &val, sizeof(val));
#endif /* SO_REUSEPORT */
#ifdef SO_NOSIGPIPE
val = 1;
- setsockopt(*sock, SOL_SOCKET, SO_NOSIGPIPE, &val, sizeof(val));
+ setsockopt(*sock, SOL_SOCKET, SO_NOSIGPIPE, CUPS_SOCAST &val, sizeof(val));
#endif /* SO_NOSIGPIPE */
/*
*/
val = 1;
-#ifdef WIN32
- setsockopt(*sock, IPPROTO_TCP, TCP_NODELAY, (const char *)&val,
- sizeof(val));
-#else
- setsockopt(*sock, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
-#endif /* WIN32 */
+ setsockopt(*sock, IPPROTO_TCP, TCP_NODELAY, CUPS_SOCAST &val, sizeof(val));
#ifdef FD_CLOEXEC
/*
fcntl(*sock, F_SETFD, FD_CLOEXEC);
#endif /* FD_CLOEXEC */
+#ifdef O_NONBLOCK
+ /*
+ * Do an asynchronous connect by setting the socket non-blocking...
+ */
+
+ DEBUG_printf(("httpAddrConnect2: Setting non-blocking connect()"));
+
+ flags = fcntl(*sock, F_GETFL, 0);
+ if (msec != INT_MAX)
+ {
+ DEBUG_puts("httpAddrConnect2: Setting non-blocking connect()");
+
+ fcntl(*sock, F_SETFL, flags | O_NONBLOCK);
+ }
+#endif /* O_NONBLOCK */
+
/*
* Then connect...
*/
if (!connect(*sock, &(addrlist->addr.addr),
httpAddrLength(&(addrlist->addr))))
- break;
+ {
+ DEBUG_printf(("1httpAddrConnect2: Connected to %s:%d...",
+ httpAddrString(&(addrlist->addr), temp, sizeof(temp)),
+ httpAddrPort(&(addrlist->addr))));
+
+#ifdef O_NONBLOCK
+ fcntl(*sock, F_SETFL, flags);
+#endif /* O_NONBLOCK */
+
+ return (addrlist);
+ }
+
+#ifdef O_NONBLOCK
+# ifdef WIN32
+ if (WSAGetLastError() == WSAEINPROGRESS ||
+ WSAGetLastError() == WSAEWOULDBLOCK)
+# else
+ if (errno == EINPROGRESS || errno == EWOULDBLOCK)
+# endif /* WIN32 */
+ {
+ DEBUG_puts("1httpAddrConnect2: Finishing async connect()");
+
+ fcntl(*sock, F_SETFL, flags);
+
+ for (remaining = msec; remaining > 0; remaining -= 250)
+ {
+ do
+ {
+ if (cancel && *cancel)
+ {
+ /*
+ * Close this socket and return...
+ */
+
+ DEBUG_puts("1httpAddrConnect2: Canceled connect()");
+
+ httpAddrClose(NULL, *sock);
+
+ *sock = -1;
+
+ return (NULL);
+ }
+
+# ifdef HAVE_POLL
+ pfd.fd = *sock;
+ pfd.events = POLLIN | POLLOUT;
+
+ nfds = poll(&pfd, 1, remaining > 250 ? 250 : remaining);
+
+ DEBUG_printf(("1httpAddrConnect2: poll() returned %d (%d)", nfds,
+ errno));
+
+# else
+ FD_ZERO(&input_set);
+ FD_SET(*sock, &input_set);
+ output_set = input_set;
+
+ timeout.tv_sec = 0;
+ timeout.tv_usec = (remaining > 250 ? 250 : remaining) * 1000;
+
+ nfds = select(*sock + 1, &input_set, &output_set, NULL, &timeout);
+
+ DEBUG_printf(("1httpAddrConnect2: select() returned %d (%d)", nfds,
+ errno));
+# endif /* HAVE_POLL */
+ }
+# ifdef WIN32
+ while (nfds < 0 && (WSAGetLastError() == WSAEINTR ||
+ WSAGetLastError() == WSAEWOULDBLOCK));
+# else
+ while (nfds < 0 && (errno == EINTR || errno == EAGAIN));
+# endif /* WIN32 */
+
+ if (nfds > 0)
+ {
+ len = sizeof(peer);
+ if (!getpeername(*sock, (struct sockaddr *)&peer, &len))
+ {
+ DEBUG_printf(("1httpAddrConnect2: Connected to %s:%d...",
+ httpAddrString(&peer, temp, sizeof(temp)),
+ httpAddrPort(&peer)));
+
+ return (addrlist);
+ }
+
+ break;
+ }
+ }
+ }
+#endif /* O_NONBLOCK */
+
+ DEBUG_printf(("1httpAddrConnect2: Unable to connect to %s:%d: %s",
+ httpAddrString(&(addrlist->addr), temp, sizeof(temp)),
+ httpAddrPort(&(addrlist->addr)), strerror(errno)));
+
+#ifndef WIN32
+ if (errno == EINPROGRESS)
+ errno = ETIMEDOUT;
+#endif /* !WIN32 */
/*
* Close this socket and move to the next address...
*/
+ httpAddrClose(NULL, *sock);
+
+ *sock = -1;
+ addrlist = addrlist->next;
+ }
+
+ if (!addrlist)
#ifdef WIN32
- closesocket(*sock);
+ _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, "Connection failed", 0);
#else
- close(*sock);
+ _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, strerror(errno), 0);
#endif /* WIN32 */
- addrlist = addrlist->next;
+ return (addrlist);
+}
+
+
+
+/*
+ * 'httpAddrCopyList()' - Copy an address list.
+ *
+ * @since CUPS 1.7/OS X 10.9@
+ */
+
+http_addrlist_t * /* O - New address list or @code NULL@ on error */
+httpAddrCopyList(
+ http_addrlist_t *src) /* I - Source address list */
+{
+ http_addrlist_t *dst = NULL, /* First list entry */
+ *prev = NULL, /* Previous list entry */
+ *current = NULL;/* Current list entry */
+
+
+ while (src)
+ {
+ if ((current = malloc(sizeof(http_addrlist_t))) == NULL)
+ {
+ current = dst;
+
+ while (current)
+ {
+ prev = current;
+ current = current->next;
+
+ free(prev);
+ }
+
+ return (NULL);
+ }
+
+ memcpy(current, src, sizeof(http_addrlist_t));
+
+ current->next = NULL;
+
+ if (prev)
+ prev->next = current;
+ else
+ dst = current;
+
+ prev = current;
+ src = src->next;
}
- return (addrlist);
+ return (dst);
}
/*
* 'httpAddrFreeList()' - Free an address list.
*
- * @since CUPS 1.2@
+ * @since CUPS 1.2/OS X 10.5@
*/
void
/*
* 'httpAddrGetList()' - Get a list of addresses for a hostname.
*
- * @since CUPS 1.2@
+ * @since CUPS 1.2/OS X 10.5@
*/
http_addrlist_t * /* O - List of addresses or NULL */
http_addrlist_t *first, /* First address in list */
*addr, /* Current address in list */
*temp; /* New address */
+ _cups_globals_t *cg = _cupsGlobals();
+ /* Global data */
#ifdef DEBUG
family == AF_INET ? "INET" : "???", service);
#endif /* DEBUG */
+#ifdef HAVE_RES_INIT
+ /*
+ * STR #2920: Initialize resolver after failure in cups-polld
+ *
+ * If the previous lookup failed, re-initialize the resolver to prevent
+ * temporary network errors from persisting. This *should* be handled by
+ * the resolver libraries, but apparently the glibc folks do not agree.
+ *
+ * We set a flag at the end of this function if we encounter an error that
+ * requires reinitialization of the resolver functions. We then call
+ * res_init() if the flag is set on the next call here or in httpAddrLookup().
+ */
+
+ if (cg->need_res_init)
+ {
+ res_init();
+
+ cg->need_res_init = 0;
+ }
+#endif /* HAVE_RES_INIT */
+
/*
* Lookup the address the best way we can...
*/
}
else
#endif /* AF_LOCAL */
+ if (!hostname || _cups_strcasecmp(hostname, "localhost"))
{
#ifdef HAVE_GETADDRINFO
struct addrinfo hints, /* Address lookup hints */
*results, /* Address lookup results */
*current; /* Current result */
- char ipv6[1024], /* IPv6 address */
+ char ipv6[64], /* IPv6 address */
*ipv6zone; /* Pointer to zone separator */
int ipv6len; /* Length of IPv6 address */
+ int error; /* getaddrinfo() error */
+
/*
* Lookup the address as needed...
}
}
- if (!getaddrinfo(hostname, service, &hints, &results))
+ if ((error = getaddrinfo(hostname, service, &hints, &results)) == 0)
{
/*
* Copy the results to our own address list structure...
if (!temp)
{
httpAddrFreeList(first);
+ _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
return (NULL);
}
freeaddrinfo(results);
}
+ else
+ {
+ if (error == EAI_FAIL)
+ cg->need_res_init = 1;
+
+ _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gai_strerror(error), 0);
+ }
+
#else
if (hostname)
{
portnum = 80;
else if (!strcmp(service, "https"))
portnum = 443;
- else if (!strcmp(service, "ipp"))
+ else if (!strcmp(service, "ipp") || !strcmp(service, "ipps"))
portnum = 631;
else if (!strcmp(service, "lpd"))
portnum = 515;
return (NULL);
first->addr.ipv4.sin_family = AF_INET;
- first->addr.ipv4.sin_addr.s_addr = htonl(((((((ip[0] << 8) |
- ip[1]) << 8) |
- ip[2]) << 8) | ip[3]));
+ first->addr.ipv4.sin_addr.s_addr = htonl((((((((unsigned)ip[0] << 8) |
+ (unsigned)ip[1]) << 8) |
+ (unsigned)ip[2]) << 8) |
+ (unsigned)ip[3]));
first->addr.ipv4.sin_port = htons(portnum);
}
}
addr = temp;
}
}
+ else
+ {
+ if (h_errno == NO_RECOVERY)
+ cg->need_res_init = 1;
+
+ _cupsSetError(IPP_STATUS_ERROR_INTERNAL, hstrerror(h_errno), 0);
+ }
}
#endif /* HAVE_GETADDRINFO */
}
* Detect some common errors and handle them sanely...
*/
- if (!addr && (!hostname || !strcmp(hostname, "localhost")))
+ if (!addr && (!hostname || !_cups_strcasecmp(hostname, "localhost")))
{
struct servent *port; /* Port number for service */
int portnum; /* Port number */
portnum = 80;
else if (!strcmp(service, "https"))
portnum = 443;
- else if (!strcmp(service, "ipp"))
+ else if (!strcmp(service, "ipp") || !strcmp(service, "ipps"))
portnum = 631;
else if (!strcmp(service, "lpd"))
portnum = 515;
else if (!strcmp(service, "socket"))
portnum = 9100;
else
+ {
+ httpAddrFreeList(first);
+
+ _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unknown service name."), 1);
return (NULL);
+ }
- if (hostname && !strcmp(hostname, "localhost"))
+ if (hostname && !_cups_strcasecmp(hostname, "localhost"))
{
/*
* Unfortunately, some users ignore all of the warnings in the
temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t));
if (!temp)
{
+ _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
httpAddrFreeList(first);
return (NULL);
}
temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t));
if (!temp)
{
+ _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
httpAddrFreeList(first);
return (NULL);
}
if (addr)
addr->next = temp;
- else
- addr = temp;
}
}
else if (!hostname)
temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t));
if (!temp)
{
+ _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
httpAddrFreeList(first);
return (NULL);
}
temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t));
if (!temp)
{
+ _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
httpAddrFreeList(first);
return (NULL);
}
if (addr)
addr->next = temp;
- else
- addr = temp;
}
}
}
/*
- * End of "$Id: http-addrlist.c 6649 2007-07-11 21:46:42Z mike $".
+ * End of "$Id$".
*/
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