| /* |
| * HTTP address routines for CUPS. |
| * |
| * Copyright 2007-2014 by Apple Inc. |
| * Copyright 1997-2006 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/". |
| * |
| * This file is subject to the Apple OS-Developed Software exception. |
| */ |
| |
| /* |
| * Include necessary headers... |
| */ |
| |
| #include "cups-private.h" |
| #include <sys/stat.h> |
| #ifdef HAVE_RESOLV_H |
| # include <resolv.h> |
| #endif /* HAVE_RESOLV_H */ |
| #ifdef __APPLE__ |
| # include <CoreFoundation/CoreFoundation.h> |
| # include <SystemConfiguration/SystemConfiguration.h> |
| #endif /* __APPLE__ */ |
| |
| |
| /* |
| * 'httpAddrAny()' - Check for the "any" address. |
| * |
| * @since CUPS 1.2/macOS 10.5@ |
| */ |
| |
| int /* O - 1 if "any", 0 otherwise */ |
| httpAddrAny(const http_addr_t *addr) /* I - Address to check */ |
| { |
| if (!addr) |
| return (0); |
| |
| #ifdef AF_INET6 |
| if (addr->addr.sa_family == AF_INET6 && |
| IN6_IS_ADDR_UNSPECIFIED(&(addr->ipv6.sin6_addr))) |
| return (1); |
| #endif /* AF_INET6 */ |
| |
| if (addr->addr.sa_family == AF_INET && |
| ntohl(addr->ipv4.sin_addr.s_addr) == 0x00000000) |
| return (1); |
| |
| return (0); |
| } |
| |
| |
| /* |
| * 'httpAddrClose()' - Close a socket created by @link httpAddrConnect@ or |
| * @link httpAddrListen@. |
| * |
| * Pass @code NULL@ for sockets created with @link httpAddrConnect@ and the |
| * listen address for sockets created with @link httpAddrListen@. This will |
| * ensure that domain sockets are removed when closed. |
| * |
| * @since CUPS 2.0/OS 10.10@ |
| */ |
| |
| int /* O - 0 on success, -1 on failure */ |
| httpAddrClose(http_addr_t *addr, /* I - Listen address or @code NULL@ */ |
| int fd) /* I - Socket file descriptor */ |
| { |
| #ifdef WIN32 |
| if (closesocket(fd)) |
| #else |
| if (close(fd)) |
| #endif /* WIN32 */ |
| return (-1); |
| |
| #ifdef AF_LOCAL |
| if (addr && addr->addr.sa_family == AF_LOCAL) |
| return (unlink(addr->un.sun_path)); |
| #endif /* AF_LOCAL */ |
| |
| return (0); |
| } |
| |
| |
| /* |
| * 'httpAddrEqual()' - Compare two addresses. |
| * |
| * @since CUPS 1.2/macOS 10.5@ |
| */ |
| |
| int /* O - 1 if equal, 0 if not */ |
| httpAddrEqual(const http_addr_t *addr1, /* I - First address */ |
| const http_addr_t *addr2) /* I - Second address */ |
| { |
| if (!addr1 && !addr2) |
| return (1); |
| |
| if (!addr1 || !addr2) |
| return (0); |
| |
| if (addr1->addr.sa_family != addr2->addr.sa_family) |
| return (0); |
| |
| #ifdef AF_LOCAL |
| if (addr1->addr.sa_family == AF_LOCAL) |
| return (!strcmp(addr1->un.sun_path, addr2->un.sun_path)); |
| #endif /* AF_LOCAL */ |
| |
| #ifdef AF_INET6 |
| if (addr1->addr.sa_family == AF_INET6) |
| return (!memcmp(&(addr1->ipv6.sin6_addr), &(addr2->ipv6.sin6_addr), 16)); |
| #endif /* AF_INET6 */ |
| |
| return (addr1->ipv4.sin_addr.s_addr == addr2->ipv4.sin_addr.s_addr); |
| } |
| |
| |
| /* |
| * 'httpAddrLength()' - Return the length of the address in bytes. |
| * |
| * @since CUPS 1.2/macOS 10.5@ |
| */ |
| |
| int /* O - Length in bytes */ |
| httpAddrLength(const http_addr_t *addr) /* I - Address */ |
| { |
| if (!addr) |
| return (0); |
| |
| #ifdef AF_INET6 |
| if (addr->addr.sa_family == AF_INET6) |
| return (sizeof(addr->ipv6)); |
| else |
| #endif /* AF_INET6 */ |
| #ifdef AF_LOCAL |
| if (addr->addr.sa_family == AF_LOCAL) |
| return ((int)(offsetof(struct sockaddr_un, sun_path) + strlen(addr->un.sun_path) + 1)); |
| else |
| #endif /* AF_LOCAL */ |
| if (addr->addr.sa_family == AF_INET) |
| return (sizeof(addr->ipv4)); |
| else |
| return (0); |
| |
| } |
| |
| |
| /* |
| * 'httpAddrListen()' - Create a listening socket bound to the specified |
| * address and port. |
| * |
| * @since CUPS 1.7/macOS 10.9@ |
| */ |
| |
| int /* O - Socket or -1 on error */ |
| httpAddrListen(http_addr_t *addr, /* I - Address to bind to */ |
| int port) /* I - Port number to bind to */ |
| { |
| int fd = -1, /* Socket */ |
| val, /* Socket value */ |
| status; /* Bind status */ |
| |
| |
| /* |
| * Range check input... |
| */ |
| |
| if (!addr || port < 0) |
| return (-1); |
| |
| /* |
| * Create the socket and set options... |
| */ |
| |
| if ((fd = socket(addr->addr.sa_family, SOCK_STREAM, 0)) < 0) |
| { |
| _cupsSetHTTPError(HTTP_STATUS_ERROR); |
| return (-1); |
| } |
| |
| val = 1; |
| setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, CUPS_SOCAST &val, sizeof(val)); |
| |
| #ifdef IPV6_V6ONLY |
| if (addr->addr.sa_family == AF_INET6) |
| setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, CUPS_SOCAST &val, sizeof(val)); |
| #endif /* IPV6_V6ONLY */ |
| |
| /* |
| * Bind the socket... |
| */ |
| |
| #ifdef AF_LOCAL |
| if (addr->addr.sa_family == AF_LOCAL) |
| { |
| mode_t mask; /* Umask setting */ |
| |
| /* |
| * Remove any existing domain socket file... |
| */ |
| |
| unlink(addr->un.sun_path); |
| |
| /* |
| * Save the current umask and set it to 0 so that all users can access |
| * the domain socket... |
| */ |
| |
| mask = umask(0); |
| |
| /* |
| * Bind the domain socket... |
| */ |
| |
| status = bind(fd, (struct sockaddr *)addr, (socklen_t)httpAddrLength(addr)); |
| |
| /* |
| * Restore the umask and fix permissions... |
| */ |
| |
| umask(mask); |
| chmod(addr->un.sun_path, 0140777); |
| } |
| else |
| #endif /* AF_LOCAL */ |
| { |
| _httpAddrSetPort(addr, port); |
| |
| status = bind(fd, (struct sockaddr *)addr, (socklen_t)httpAddrLength(addr)); |
| } |
| |
| if (status) |
| { |
| _cupsSetHTTPError(HTTP_STATUS_ERROR); |
| |
| close(fd); |
| |
| return (-1); |
| } |
| |
| /* |
| * Listen... |
| */ |
| |
| if (listen(fd, 5)) |
| { |
| _cupsSetHTTPError(HTTP_STATUS_ERROR); |
| |
| close(fd); |
| |
| return (-1); |
| } |
| |
| /* |
| * Close on exec... |
| */ |
| |
| #ifndef WIN32 |
| fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); |
| #endif /* !WIN32 */ |
| |
| #ifdef SO_NOSIGPIPE |
| /* |
| * Disable SIGPIPE for this socket. |
| */ |
| |
| val = 1; |
| setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, CUPS_SOCAST &val, sizeof(val)); |
| #endif /* SO_NOSIGPIPE */ |
| |
| return (fd); |
| } |
| |
| |
| /* |
| * 'httpAddrLocalhost()' - Check for the local loopback address. |
| * |
| * @since CUPS 1.2/macOS 10.5@ |
| */ |
| |
| int /* O - 1 if local host, 0 otherwise */ |
| httpAddrLocalhost( |
| const http_addr_t *addr) /* I - Address to check */ |
| { |
| if (!addr) |
| return (1); |
| |
| #ifdef AF_INET6 |
| if (addr->addr.sa_family == AF_INET6 && |
| IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr))) |
| return (1); |
| #endif /* AF_INET6 */ |
| |
| #ifdef AF_LOCAL |
| if (addr->addr.sa_family == AF_LOCAL) |
| return (1); |
| #endif /* AF_LOCAL */ |
| |
| if (addr->addr.sa_family == AF_INET && |
| (ntohl(addr->ipv4.sin_addr.s_addr) & 0xff000000) == 0x7f000000) |
| return (1); |
| |
| return (0); |
| } |
| |
| |
| /* |
| * 'httpAddrLookup()' - Lookup the hostname associated with the address. |
| * |
| * @since CUPS 1.2/macOS 10.5@ |
| */ |
| |
| char * /* O - Host name */ |
| httpAddrLookup( |
| const http_addr_t *addr, /* I - Address to lookup */ |
| char *name, /* I - Host name buffer */ |
| int namelen) /* I - Size of name buffer */ |
| { |
| _cups_globals_t *cg = _cupsGlobals(); |
| /* Global data */ |
| |
| |
| DEBUG_printf(("httpAddrLookup(addr=%p, name=%p, namelen=%d)", (void *)addr, (void *)name, namelen)); |
| |
| /* |
| * Range check input... |
| */ |
| |
| if (!addr || !name || namelen <= 2) |
| { |
| if (name && namelen >= 1) |
| *name = '\0'; |
| |
| return (NULL); |
| } |
| |
| #ifdef AF_LOCAL |
| if (addr->addr.sa_family == AF_LOCAL) |
| { |
| strlcpy(name, addr->un.sun_path, (size_t)namelen); |
| return (name); |
| } |
| #endif /* AF_LOCAL */ |
| |
| /* |
| * Optimize lookups for localhost/loopback addresses... |
| */ |
| |
| if (httpAddrLocalhost(addr)) |
| { |
| strlcpy(name, "localhost", (size_t)namelen); |
| return (name); |
| } |
| |
| #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 */ |
| |
| #ifdef HAVE_GETNAMEINFO |
| { |
| /* |
| * STR #2486: httpAddrLookup() fails when getnameinfo() returns EAI_AGAIN |
| * |
| * FWIW, I think this is really a bug in the implementation of |
| * getnameinfo(), but falling back on httpAddrString() is easy to |
| * do... |
| */ |
| |
| int error = getnameinfo(&addr->addr, (socklen_t)httpAddrLength(addr), name, (socklen_t)namelen, NULL, 0, 0); |
| |
| if (error) |
| { |
| if (error == EAI_FAIL) |
| cg->need_res_init = 1; |
| |
| return (httpAddrString(addr, name, namelen)); |
| } |
| } |
| #else |
| { |
| struct hostent *host; /* Host from name service */ |
| |
| |
| # ifdef AF_INET6 |
| if (addr->addr.sa_family == AF_INET6) |
| host = gethostbyaddr((char *)&(addr->ipv6.sin6_addr), |
| sizeof(struct in_addr), AF_INET6); |
| else |
| # endif /* AF_INET6 */ |
| host = gethostbyaddr((char *)&(addr->ipv4.sin_addr), |
| sizeof(struct in_addr), AF_INET); |
| |
| if (host == NULL) |
| { |
| /* |
| * No hostname, so return the raw address... |
| */ |
| |
| if (h_errno == NO_RECOVERY) |
| cg->need_res_init = 1; |
| |
| return (httpAddrString(addr, name, namelen)); |
| } |
| |
| strlcpy(name, host->h_name, (size_t)namelen); |
| } |
| #endif /* HAVE_GETNAMEINFO */ |
| |
| DEBUG_printf(("1httpAddrLookup: returning \"%s\"...", name)); |
| |
| return (name); |
| } |
| |
| |
| /* |
| * 'httpAddrFamily()' - Get the address family of an address. |
| */ |
| |
| int /* O - Address family */ |
| httpAddrFamily(http_addr_t *addr) /* I - Address */ |
| { |
| if (addr) |
| return (addr->addr.sa_family); |
| else |
| return (0); |
| } |
| |
| |
| /* |
| * 'httpAddrPort()' - Get the port number associated with an address. |
| * |
| * @since CUPS 1.7/macOS 10.9@ |
| */ |
| |
| int /* O - Port number */ |
| httpAddrPort(http_addr_t *addr) /* I - Address */ |
| { |
| if (!addr) |
| return (-1); |
| #ifdef AF_INET6 |
| else if (addr->addr.sa_family == AF_INET6) |
| return (ntohs(addr->ipv6.sin6_port)); |
| #endif /* AF_INET6 */ |
| else if (addr->addr.sa_family == AF_INET) |
| return (ntohs(addr->ipv4.sin_port)); |
| else |
| return (0); |
| } |
| |
| |
| /* |
| * '_httpAddrSetPort()' - Set the port number associated with an address. |
| */ |
| |
| void |
| _httpAddrSetPort(http_addr_t *addr, /* I - Address */ |
| int port) /* I - Port */ |
| { |
| if (!addr || port <= 0) |
| return; |
| |
| #ifdef AF_INET6 |
| if (addr->addr.sa_family == AF_INET6) |
| addr->ipv6.sin6_port = htons(port); |
| else |
| #endif /* AF_INET6 */ |
| if (addr->addr.sa_family == AF_INET) |
| addr->ipv4.sin_port = htons(port); |
| } |
| |
| |
| /* |
| * 'httpAddrString()' - Convert an address to a numeric string. |
| * |
| * @since CUPS 1.2/macOS 10.5@ |
| */ |
| |
| char * /* O - Numeric address string */ |
| httpAddrString(const http_addr_t *addr, /* I - Address to convert */ |
| char *s, /* I - String buffer */ |
| int slen) /* I - Length of string */ |
| { |
| DEBUG_printf(("httpAddrString(addr=%p, s=%p, slen=%d)", (void *)addr, (void *)s, slen)); |
| |
| /* |
| * Range check input... |
| */ |
| |
| if (!addr || !s || slen <= 2) |
| { |
| if (s && slen >= 1) |
| *s = '\0'; |
| |
| return (NULL); |
| } |
| |
| #ifdef AF_LOCAL |
| if (addr->addr.sa_family == AF_LOCAL) |
| { |
| if (addr->un.sun_path[0] == '/') |
| strlcpy(s, addr->un.sun_path, (size_t)slen); |
| else |
| strlcpy(s, "localhost", (size_t)slen); |
| } |
| else |
| #endif /* AF_LOCAL */ |
| if (addr->addr.sa_family == AF_INET) |
| { |
| unsigned temp; /* Temporary address */ |
| |
| temp = ntohl(addr->ipv4.sin_addr.s_addr); |
| |
| snprintf(s, (size_t)slen, "%d.%d.%d.%d", (temp >> 24) & 255, |
| (temp >> 16) & 255, (temp >> 8) & 255, temp & 255); |
| } |
| #ifdef AF_INET6 |
| else if (addr->addr.sa_family == AF_INET6) |
| { |
| char *sptr, /* Pointer into string */ |
| temps[64]; /* Temporary string for address */ |
| |
| # ifdef HAVE_GETNAMEINFO |
| if (getnameinfo(&addr->addr, (socklen_t)httpAddrLength(addr), temps, sizeof(temps), NULL, 0, NI_NUMERICHOST)) |
| { |
| /* |
| * If we get an error back, then the address type is not supported |
| * and we should zero out the buffer... |
| */ |
| |
| s[0] = '\0'; |
| |
| return (NULL); |
| } |
| else if ((sptr = strchr(temps, '%')) != NULL) |
| { |
| /* |
| * Convert "%zone" to "+zone" to match URI form... |
| */ |
| |
| *sptr = '+'; |
| } |
| |
| # else |
| int i; /* Looping var */ |
| unsigned temp; /* Current value */ |
| const char *prefix; /* Prefix for address */ |
| |
| |
| prefix = ""; |
| for (sptr = temps, i = 0; i < 4 && addr->ipv6.sin6_addr.s6_addr32[i]; i ++) |
| { |
| temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
| |
| snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s%x", prefix, (temp >> 16) & 0xffff); |
| prefix = ":"; |
| sptr += strlen(sptr); |
| |
| temp &= 0xffff; |
| |
| if (temp || i == 3 || addr->ipv6.sin6_addr.s6_addr32[i + 1]) |
| { |
| snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s%x", prefix, temp); |
| sptr += strlen(sptr); |
| } |
| } |
| |
| if (i < 4) |
| { |
| while (i < 4 && !addr->ipv6.sin6_addr.s6_addr32[i]) |
| i ++; |
| |
| if (i < 4) |
| { |
| snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s:", prefix); |
| prefix = ":"; |
| sptr += strlen(sptr); |
| |
| for (; i < 4; i ++) |
| { |
| temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
| |
| if ((temp & 0xffff0000) || |
| (i > 0 && addr->ipv6.sin6_addr.s6_addr32[i - 1])) |
| { |
| snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s%x", prefix, (temp >> 16) & 0xffff); |
| sptr += strlen(sptr); |
| } |
| |
| snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s%x", prefix, temp & 0xffff); |
| sptr += strlen(sptr); |
| } |
| } |
| else if (sptr == s) |
| { |
| /* |
| * Empty address... |
| */ |
| |
| strlcpy(temps, "::", sizeof(temps)); |
| } |
| else |
| { |
| /* |
| * Empty at end... |
| */ |
| |
| strlcpy(sptr, "::", sizeof(temps) - (size_t)(sptr - temps)); |
| } |
| } |
| # endif /* HAVE_GETNAMEINFO */ |
| |
| /* |
| * Add "[v1." and "]" around IPv6 address to convert to URI form. |
| */ |
| |
| snprintf(s, (size_t)slen, "[v1.%s]", temps); |
| } |
| #endif /* AF_INET6 */ |
| else |
| strlcpy(s, "UNKNOWN", (size_t)slen); |
| |
| DEBUG_printf(("1httpAddrString: returning \"%s\"...", s)); |
| |
| return (s); |
| } |
| |
| |
| /* |
| * 'httpGetAddress()' - Get the address of the connected peer of a connection. |
| * |
| * Returns @code NULL@ if the socket is currently unconnected. |
| * |
| * @since CUPS 2.0/OS 10.10@ |
| */ |
| |
| http_addr_t * /* O - Connected address or @code NULL@ */ |
| httpGetAddress(http_t *http) /* I - HTTP connection */ |
| { |
| if (http) |
| return (http->hostaddr); |
| else |
| return (NULL); |
| } |
| |
| |
| /* |
| * 'httpGetHostByName()' - Lookup a hostname or IPv4 address, and return |
| * address records for the specified name. |
| * |
| * @deprecated@ |
| */ |
| |
| struct hostent * /* O - Host entry */ |
| httpGetHostByName(const char *name) /* I - Hostname or IP address */ |
| { |
| const char *nameptr; /* Pointer into name */ |
| unsigned ip[4]; /* IP address components */ |
| _cups_globals_t *cg = _cupsGlobals(); |
| /* Pointer to library globals */ |
| |
| |
| DEBUG_printf(("httpGetHostByName(name=\"%s\")", name)); |
| |
| /* |
| * Avoid lookup delays and configuration problems when connecting |
| * to the localhost address... |
| */ |
| |
| if (!strcmp(name, "localhost")) |
| name = "127.0.0.1"; |
| |
| /* |
| * This function is needed because some operating systems have a |
| * buggy implementation of gethostbyname() that does not support |
| * IP addresses. If the first character of the name string is a |
| * number, then sscanf() is used to extract the IP components. |
| * We then pack the components into an IPv4 address manually, |
| * since the inet_aton() function is deprecated. We use the |
| * htonl() macro to get the right byte order for the address. |
| * |
| * We also support domain sockets when supported by the underlying |
| * OS... |
| */ |
| |
| #ifdef AF_LOCAL |
| if (name[0] == '/') |
| { |
| /* |
| * A domain socket address, so make an AF_LOCAL entry and return it... |
| */ |
| |
| cg->hostent.h_name = (char *)name; |
| cg->hostent.h_aliases = NULL; |
| cg->hostent.h_addrtype = AF_LOCAL; |
| cg->hostent.h_length = (int)strlen(name) + 1; |
| cg->hostent.h_addr_list = cg->ip_ptrs; |
| cg->ip_ptrs[0] = (char *)name; |
| cg->ip_ptrs[1] = NULL; |
| |
| DEBUG_puts("1httpGetHostByName: returning domain socket address..."); |
| |
| return (&cg->hostent); |
| } |
| #endif /* AF_LOCAL */ |
| |
| for (nameptr = name; isdigit(*nameptr & 255) || *nameptr == '.'; nameptr ++); |
| |
| if (!*nameptr) |
| { |
| /* |
| * We have an IPv4 address; break it up and provide the host entry |
| * to the caller. |
| */ |
| |
| if (sscanf(name, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) != 4) |
| return (NULL); /* Must have 4 numbers */ |
| |
| if (ip[0] > 255 || ip[1] > 255 || ip[2] > 255 || ip[3] > 255) |
| return (NULL); /* Invalid byte ranges! */ |
| |
| cg->ip_addr = htonl((((((((unsigned)ip[0] << 8) | (unsigned)ip[1]) << 8) | |
| (unsigned)ip[2]) << 8) | |
| (unsigned)ip[3])); |
| |
| /* |
| * Fill in the host entry and return it... |
| */ |
| |
| cg->hostent.h_name = (char *)name; |
| cg->hostent.h_aliases = NULL; |
| cg->hostent.h_addrtype = AF_INET; |
| cg->hostent.h_length = 4; |
| cg->hostent.h_addr_list = cg->ip_ptrs; |
| cg->ip_ptrs[0] = (char *)&(cg->ip_addr); |
| cg->ip_ptrs[1] = NULL; |
| |
| DEBUG_puts("1httpGetHostByName: returning IPv4 address..."); |
| |
| return (&cg->hostent); |
| } |
| else |
| { |
| /* |
| * Use the gethostbyname() function to get the IPv4 address for |
| * the name... |
| */ |
| |
| DEBUG_puts("1httpGetHostByName: returning domain lookup address(es)..."); |
| |
| return (gethostbyname(name)); |
| } |
| } |
| |
| |
| /* |
| * 'httpGetHostname()' - Get the FQDN for the connection or local system. |
| * |
| * When "http" points to a connected socket, return the hostname or |
| * address that was used in the call to httpConnect() or httpConnectEncrypt(), |
| * or the address of the client for the connection from httpAcceptConnection(). |
| * Otherwise, return the FQDN for the local system using both gethostname() |
| * and gethostbyname() to get the local hostname with domain. |
| * |
| * @since CUPS 1.2/macOS 10.5@ |
| */ |
| |
| const char * /* O - FQDN for connection or system */ |
| httpGetHostname(http_t *http, /* I - HTTP connection or NULL */ |
| char *s, /* I - String buffer for name */ |
| int slen) /* I - Size of buffer */ |
| { |
| if (http) |
| { |
| if (!s || slen <= 1) |
| { |
| if (http->hostname[0] == '/') |
| return ("localhost"); |
| else |
| return (http->hostname); |
| } |
| else if (http->hostname[0] == '/') |
| strlcpy(s, "localhost", (size_t)slen); |
| else |
| strlcpy(s, http->hostname, (size_t)slen); |
| } |
| else |
| { |
| /* |
| * Get the hostname... |
| */ |
| |
| if (!s || slen <= 1) |
| return (NULL); |
| |
| if (gethostname(s, (size_t)slen) < 0) |
| strlcpy(s, "localhost", (size_t)slen); |
| |
| if (!strchr(s, '.')) |
| { |
| #ifdef HAVE_SCDYNAMICSTORECOPYCOMPUTERNAME |
| /* |
| * The hostname is not a FQDN, so use the local hostname from the |
| * SystemConfiguration framework... |
| */ |
| |
| SCDynamicStoreRef sc = SCDynamicStoreCreate(kCFAllocatorDefault, |
| CFSTR("libcups"), NULL, NULL); |
| /* System configuration data */ |
| CFStringRef local = sc ? SCDynamicStoreCopyLocalHostName(sc) : NULL; |
| /* Local host name */ |
| char localStr[1024]; /* Local host name C string */ |
| |
| if (local && CFStringGetCString(local, localStr, sizeof(localStr), |
| kCFStringEncodingUTF8)) |
| { |
| /* |
| * Append ".local." to the hostname we get... |
| */ |
| |
| snprintf(s, (size_t)slen, "%s.local.", localStr); |
| } |
| |
| if (local) |
| CFRelease(local); |
| if (sc) |
| CFRelease(sc); |
| |
| #else |
| /* |
| * The hostname is not a FQDN, so look it up... |
| */ |
| |
| struct hostent *host; /* Host entry to get FQDN */ |
| |
| if ((host = gethostbyname(s)) != NULL && host->h_name) |
| { |
| /* |
| * Use the resolved hostname... |
| */ |
| |
| strlcpy(s, host->h_name, (size_t)slen); |
| } |
| #endif /* HAVE_SCDYNAMICSTORECOPYCOMPUTERNAME */ |
| } |
| |
| /* |
| * Make sure .local hostnames end with a period... |
| */ |
| |
| if (strlen(s) > 6 && !strcmp(s + strlen(s) - 6, ".local")) |
| strlcat(s, ".", (size_t)slen); |
| } |
| |
| /* |
| * Return the hostname with as much domain info as we have... |
| */ |
| |
| return (s); |
| } |
| |
| |
| /* |
| * 'httpResolveHostname()' - Resolve the hostname of the HTTP connection |
| * address. |
| * |
| * @since CUPS 2.0/OS 10.10@ |
| */ |
| |
| const char * /* O - Resolved hostname or @code NULL@ */ |
| httpResolveHostname(http_t *http, /* I - HTTP connection */ |
| char *buffer, /* I - Hostname buffer */ |
| size_t bufsize) /* I - Size of buffer */ |
| { |
| if (!http) |
| return (NULL); |
| |
| if (isdigit(http->hostname[0] & 255) || http->hostname[0] == '[') |
| { |
| char temp[1024]; /* Temporary string */ |
| |
| if (httpAddrLookup(http->hostaddr, temp, sizeof(temp))) |
| strlcpy(http->hostname, temp, sizeof(http->hostname)); |
| else |
| return (NULL); |
| } |
| |
| if (buffer) |
| { |
| if (http->hostname[0] == '/') |
| strlcpy(buffer, "localhost", bufsize); |
| else |
| strlcpy(buffer, http->hostname, bufsize); |
| |
| return (buffer); |
| } |
| else if (http->hostname[0] == '/') |
| return ("localhost"); |
| else |
| return (http->hostname); |
| } |