mirror of https://gitee.com/openkylin/cups.git
294 lines
6.9 KiB
C
294 lines
6.9 KiB
C
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/*
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* Network interface functions for the CUPS scheduler.
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*
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* Copyright © 2007-2018 by Apple Inc.
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* Copyright © 1997-2006 by Easy Software Products, all rights reserved.
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*
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* Licensed under Apache License v2.0. See the file "LICENSE" for more
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* information.
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*/
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/*
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* Include necessary headers.
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*/
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#include <cups/http-private.h>
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#include "cupsd.h"
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#include <cups/getifaddrs-internal.h>
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/*
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* Local functions...
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*/
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static void cupsdNetIFFree(void);
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static int compare_netif(cupsd_netif_t *a, cupsd_netif_t *b);
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/*
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* 'cupsdNetIFFind()' - Find a network interface.
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*/
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cupsd_netif_t * /* O - Network interface data */
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cupsdNetIFFind(const char *name) /* I - Name of interface */
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{
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cupsd_netif_t key; /* Search key */
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/*
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* Update the interface list as needed...
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*/
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if (NetIFUpdate)
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cupsdNetIFUpdate();
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/*
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* Search for the named interface...
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*/
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strlcpy(key.name, name, sizeof(key.name));
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return ((cupsd_netif_t *)cupsArrayFind(NetIFList, &key));
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}
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/*
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* 'cupsdNetIFFree()' - Free the current network interface list.
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*/
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static void
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cupsdNetIFFree(void)
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{
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cupsd_netif_t *current; /* Current interface in array */
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/*
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* Loop through the interface list and free all the records...
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*/
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for (current = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
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current;
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current = (cupsd_netif_t *)cupsArrayNext(NetIFList))
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{
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cupsArrayRemove(NetIFList, current);
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free(current);
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}
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}
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/*
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* 'cupsdNetIFUpdate()' - Update the network interface list as needed...
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*/
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void
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cupsdNetIFUpdate(void)
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{
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int match; /* Matching address? */
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cupsd_listener_t *lis; /* Listen address */
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cupsd_netif_t *temp; /* New interface */
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struct ifaddrs *addrs, /* Interface address list */
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*addr; /* Current interface address */
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char hostname[1024]; /* Hostname for address */
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size_t hostlen; /* Length of hostname */
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/*
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* Only update the list if we need to...
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*/
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if (!NetIFUpdate)
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return;
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NetIFUpdate = 0;
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/*
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* Free the old interfaces...
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*/
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cupsdNetIFFree();
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/*
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* Make sure we have an array...
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*/
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if (!NetIFList)
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NetIFList = cupsArrayNew((cups_array_func_t)compare_netif, NULL);
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if (!NetIFList)
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return;
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/*
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* Grab a new list of interfaces...
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*/
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if (getifaddrs(&addrs) < 0)
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{
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cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdNetIFUpdate: Unable to get interface list - %s", strerror(errno));
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return;
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}
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for (addr = addrs; addr != NULL; addr = addr->ifa_next)
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{
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/*
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* See if this interface address is IPv4 or IPv6...
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*/
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if (addr->ifa_addr == NULL ||
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(addr->ifa_addr->sa_family != AF_INET
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#ifdef AF_INET6
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&& addr->ifa_addr->sa_family != AF_INET6
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#endif
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) ||
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addr->ifa_netmask == NULL || addr->ifa_name == NULL)
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{
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cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdNetIFUpdate: Ignoring \"%s\".", addr->ifa_name);
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continue;
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}
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/*
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* Try looking up the hostname for the address as needed...
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*/
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if (HostNameLookups)
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httpAddrLookup((http_addr_t *)(addr->ifa_addr), hostname,
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sizeof(hostname));
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else
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{
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/*
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* Map the default server address and localhost to the server name
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* and localhost, respectively; for all other addresses, use the
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* numeric address...
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*/
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if (httpAddrLocalhost((http_addr_t *)(addr->ifa_addr)))
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strlcpy(hostname, "localhost", sizeof(hostname));
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else
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httpAddrString((http_addr_t *)(addr->ifa_addr), hostname,
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sizeof(hostname));
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}
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/*
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* Create a new address element...
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*/
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hostlen = strlen(hostname);
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if ((temp = calloc(1, sizeof(cupsd_netif_t) + hostlen)) == NULL)
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{
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cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdNetIFUpdate: Unable to allocate memory for interface.");
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break;
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}
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/*
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* Copy all of the information...
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*/
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strlcpy(temp->name, addr->ifa_name, sizeof(temp->name));
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temp->hostlen = hostlen;
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memcpy(temp->hostname, hostname, hostlen + 1);
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if (addr->ifa_addr->sa_family == AF_INET)
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{
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/*
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* Copy IPv4 addresses...
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*/
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memcpy(&(temp->address), addr->ifa_addr, sizeof(struct sockaddr_in));
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memcpy(&(temp->mask), addr->ifa_netmask, sizeof(struct sockaddr_in));
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if (addr->ifa_dstaddr)
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memcpy(&(temp->broadcast), addr->ifa_dstaddr,
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sizeof(struct sockaddr_in));
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}
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#ifdef AF_INET6
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else
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{
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/*
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* Copy IPv6 addresses...
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*/
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memcpy(&(temp->address), addr->ifa_addr, sizeof(struct sockaddr_in6));
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memcpy(&(temp->mask), addr->ifa_netmask, sizeof(struct sockaddr_in6));
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if (addr->ifa_dstaddr)
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memcpy(&(temp->broadcast), addr->ifa_dstaddr,
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sizeof(struct sockaddr_in6));
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}
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#endif /* AF_INET6 */
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if (!(addr->ifa_flags & IFF_POINTOPOINT) &&
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!httpAddrLocalhost(&(temp->address)))
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temp->is_local = 1;
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/*
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* Determine which port to use when advertising printers...
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*/
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for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
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lis;
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lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
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{
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match = 0;
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if (httpAddrAny(&(lis->address)))
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match = 1;
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else if (addr->ifa_addr->sa_family == AF_INET &&
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lis->address.addr.sa_family == AF_INET &&
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(lis->address.ipv4.sin_addr.s_addr &
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temp->mask.ipv4.sin_addr.s_addr) ==
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(temp->address.ipv4.sin_addr.s_addr &
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temp->mask.ipv4.sin_addr.s_addr))
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match = 1;
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#ifdef AF_INET6
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else if (addr->ifa_addr->sa_family == AF_INET6 &&
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lis->address.addr.sa_family == AF_INET6 &&
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(lis->address.ipv6.sin6_addr.s6_addr[0] &
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temp->mask.ipv6.sin6_addr.s6_addr[0]) ==
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(temp->address.ipv6.sin6_addr.s6_addr[0] &
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temp->mask.ipv6.sin6_addr.s6_addr[0]) &&
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(lis->address.ipv6.sin6_addr.s6_addr[1] &
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temp->mask.ipv6.sin6_addr.s6_addr[1]) ==
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(temp->address.ipv6.sin6_addr.s6_addr[1] &
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temp->mask.ipv6.sin6_addr.s6_addr[1]) &&
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(lis->address.ipv6.sin6_addr.s6_addr[2] &
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temp->mask.ipv6.sin6_addr.s6_addr[2]) ==
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(temp->address.ipv6.sin6_addr.s6_addr[2] &
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temp->mask.ipv6.sin6_addr.s6_addr[2]) &&
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(lis->address.ipv6.sin6_addr.s6_addr[3] &
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temp->mask.ipv6.sin6_addr.s6_addr[3]) ==
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(temp->address.ipv6.sin6_addr.s6_addr[3] &
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temp->mask.ipv6.sin6_addr.s6_addr[3]))
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match = 1;
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#endif /* AF_INET6 */
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if (match)
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{
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temp->port = httpAddrPort(&(lis->address));
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break;
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}
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}
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/*
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* Add it to the array...
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*/
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cupsArrayAdd(NetIFList, temp);
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cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdNetIFUpdate: \"%s\" = %s:%d",
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temp->name, temp->hostname, temp->port);
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}
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freeifaddrs(addrs);
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}
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/*
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* 'compare_netif()' - Compare two network interfaces.
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*/
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static int /* O - Result of comparison */
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compare_netif(cupsd_netif_t *a, /* I - First network interface */
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cupsd_netif_t *b) /* I - Second network interface */
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{
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return (strcmp(a->name, b->name));
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}
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