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android / platform / external / libcups / 5fb2ccdf3347f61b570c8e340f90db5cd28b29bc / . / cups / http-support.c
blob: 767fbf68920c4494a8cd3c19cff4ae376d7c0c05 [file] [log] [blame]
/*
* HTTP support routines for CUPS.
*
* Copyright 2007-2018 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
* 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"
#ifdef HAVE_DNSSD
# include <dns_sd.h>
# ifdef _WIN32
# include <io.h>
# elif defined(HAVE_POLL)
# include <poll.h>
# else
# include <sys/select.h>
# endif /* _WIN32 */
#elif defined(HAVE_AVAHI)
# include <avahi-client/client.h>
# include <avahi-client/lookup.h>
# include <avahi-common/simple-watch.h>
#endif /* HAVE_DNSSD */
/*
* Local types...
*/
typedef struct _http_uribuf_s /* URI buffer */
{
#ifdef HAVE_AVAHI
AvahiSimplePoll *poll; /* Poll state */
#endif /* HAVE_AVAHI */
char *buffer; /* Pointer to buffer */
size_t bufsize; /* Size of buffer */
int options; /* Options passed to _httpResolveURI */
const char *resource; /* Resource from URI */
const char *uuid; /* UUID from URI */
} _http_uribuf_t;
/*
* Local globals...
*/
static const char * const http_days[7] =/* Days of the week */
{
"Sun",
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat"
};
static const char * const http_months[12] =
{ /* Months of the year */
"Jan",
"Feb",
"Mar",
"Apr",
"May",
"Jun",
"Jul",
"Aug",
"Sep",
"Oct",
"Nov",
"Dec"
};
static const char * const http_states[] =
{ /* HTTP state strings */
"HTTP_STATE_ERROR",
"HTTP_STATE_WAITING",
"HTTP_STATE_OPTIONS",
"HTTP_STATE_GET",
"HTTP_STATE_GET_SEND",
"HTTP_STATE_HEAD",
"HTTP_STATE_POST",
"HTTP_STATE_POST_RECV",
"HTTP_STATE_POST_SEND",
"HTTP_STATE_PUT",
"HTTP_STATE_PUT_RECV",
"HTTP_STATE_DELETE",
"HTTP_STATE_TRACE",
"HTTP_STATE_CONNECT",
"HTTP_STATE_STATUS",
"HTTP_STATE_UNKNOWN_METHOD",
"HTTP_STATE_UNKNOWN_VERSION"
};
/*
* Local functions...
*/
static const char *http_copy_decode(char *dst, const char *src,
int dstsize, const char *term,
int decode);
static char *http_copy_encode(char *dst, const char *src,
char *dstend, const char *reserved,
const char *term, int encode);
#ifdef HAVE_DNSSD
static void DNSSD_API http_resolve_cb(DNSServiceRef sdRef,
DNSServiceFlags flags,
uint32_t interfaceIndex,
DNSServiceErrorType errorCode,
const char *fullName,
const char *hostTarget,
uint16_t port, uint16_t txtLen,
const unsigned char *txtRecord,
void *context);
#endif /* HAVE_DNSSD */
#ifdef HAVE_AVAHI
static void http_client_cb(AvahiClient *client,
AvahiClientState state, void *simple_poll);
static int http_poll_cb(struct pollfd *pollfds, unsigned int num_pollfds,
int timeout, void *context);
static void http_resolve_cb(AvahiServiceResolver *resolver,
AvahiIfIndex interface,
AvahiProtocol protocol,
AvahiResolverEvent event,
const char *name, const char *type,
const char *domain, const char *host_name,
const AvahiAddress *address, uint16_t port,
AvahiStringList *txt,
AvahiLookupResultFlags flags, void *context);
#endif /* HAVE_AVAHI */
/*
* 'httpAssembleURI()' - Assemble a uniform resource identifier from its
* components.
*
* This function escapes reserved characters in the URI depending on the
* value of the "encoding" argument. You should use this function in
* place of traditional string functions whenever you need to create a
* URI string.
*
* @since CUPS 1.2/macOS 10.5@
*/
http_uri_status_t /* O - URI status */
httpAssembleURI(
http_uri_coding_t encoding, /* I - Encoding flags */
char *uri, /* I - URI buffer */
int urilen, /* I - Size of URI buffer */
const char *scheme, /* I - Scheme name */
const char *username, /* I - Username */
const char *host, /* I - Hostname or address */
int port, /* I - Port number */
const char *resource) /* I - Resource */
{
char *ptr, /* Pointer into URI buffer */
*end; /* End of URI buffer */
/*
* Range check input...
*/
if (!uri || urilen < 1 || !scheme || port < 0)
{
if (uri)
*uri = '\0';
return (HTTP_URI_STATUS_BAD_ARGUMENTS);
}
/*
* Assemble the URI starting with the scheme...
*/
end = uri + urilen - 1;
ptr = http_copy_encode(uri, scheme, end, NULL, NULL, 0);
if (!ptr)
goto assemble_overflow;
if (!strcmp(scheme, "geo") || !strcmp(scheme, "mailto") || !strcmp(scheme, "tel"))
{
/*
* geo:, mailto:, and tel: only have :, no //...
*/
if (ptr < end)
*ptr++ = ':';
else
goto assemble_overflow;
}
else
{
/*
* Schemes other than geo:, mailto:, and tel: typically have //...
*/
if ((ptr + 2) < end)
{
*ptr++ = ':';
*ptr++ = '/';
*ptr++ = '/';
}
else
goto assemble_overflow;
}
/*
* Next the username and hostname, if any...
*/
if (host)
{
const char *hostptr; /* Pointer into hostname */
int have_ipv6; /* Do we have an IPv6 address? */
if (username && *username)
{
/*
* Add username@ first...
*/
ptr = http_copy_encode(ptr, username, end, "/?#[]@", NULL,
encoding & HTTP_URI_CODING_USERNAME);
if (!ptr)
goto assemble_overflow;
if (ptr < end)
*ptr++ = '@';
else
goto assemble_overflow;
}
/*
* Then add the hostname. Since IPv6 is a particular pain to deal
* with, we have several special cases to deal with. If we get
* an IPv6 address with brackets around it, assume it is already in
* URI format. Since DNS-SD service names can sometimes look like
* raw IPv6 addresses, we specifically look for "._tcp" in the name,
* too...
*/
for (hostptr = host,
have_ipv6 = strchr(host, ':') && !strstr(host, "._tcp");
*hostptr && have_ipv6;
hostptr ++)
if (*hostptr != ':' && !isxdigit(*hostptr & 255))
{
have_ipv6 = *hostptr == '%';
break;
}
if (have_ipv6)
{
/*
* We have a raw IPv6 address...
*/
if (strchr(host, '%') && !(encoding & HTTP_URI_CODING_RFC6874))
{
/*
* We have a link-local address, add "[v1." prefix...
*/
if ((ptr + 4) < end)
{
*ptr++ = '[';
*ptr++ = 'v';
*ptr++ = '1';
*ptr++ = '.';
}
else
goto assemble_overflow;
}
else
{
/*
* We have a normal (or RFC 6874 link-local) address, add "[" prefix...
*/
if (ptr < end)
*ptr++ = '[';
else
goto assemble_overflow;
}
/*
* Copy the rest of the IPv6 address, and terminate with "]".
*/
while (ptr < end && *host)
{
if (*host == '%')
{
/*
* Convert/encode zone separator
*/
if (encoding & HTTP_URI_CODING_RFC6874)
{
if (ptr >= (end - 2))
goto assemble_overflow;
*ptr++ = '%';
*ptr++ = '2';
*ptr++ = '5';
}
else
*ptr++ = '+';
host ++;
}
else
*ptr++ = *host++;
}
if (*host)
goto assemble_overflow;
if (ptr < end)
*ptr++ = ']';
else
goto assemble_overflow;
}
else
{
/*
* Otherwise, just copy the host string (the extra chars are not in the
* "reg-name" ABNF rule; anything <= SP or >= DEL plus % gets automatically
* percent-encoded.
*/
ptr = http_copy_encode(ptr, host, end, "\"#/:<>?@[\\]^`{|}", NULL,
encoding & HTTP_URI_CODING_HOSTNAME);
if (!ptr)
goto assemble_overflow;
}
/*
* Finish things off with the port number...
*/
if (port > 0)
{
snprintf(ptr, (size_t)(end - ptr + 1), ":%d", port);
ptr += strlen(ptr);
if (ptr >= end)
goto assemble_overflow;
}
}
/*
* Last but not least, add the resource string...
*/
if (resource)
{
char *query; /* Pointer to query string */
/*
* Copy the resource string up to the query string if present...
*/
query = strchr(resource, '?');
ptr = http_copy_encode(ptr, resource, end, NULL, "?",
encoding & HTTP_URI_CODING_RESOURCE);
if (!ptr)
goto assemble_overflow;
if (query)
{
/*
* Copy query string without encoding...
*/
ptr = http_copy_encode(ptr, query, end, NULL, NULL,
encoding & HTTP_URI_CODING_QUERY);
if (!ptr)
goto assemble_overflow;
}
}
else if (ptr < end)
*ptr++ = '/';
else
goto assemble_overflow;
/*
* Nul-terminate the URI buffer and return with no errors...
*/
*ptr = '\0';
return (HTTP_URI_STATUS_OK);
/*
* Clear the URI string and return an overflow error; I don't usually
* like goto's, but in this case it makes sense...
*/
assemble_overflow:
*uri = '\0';
return (HTTP_URI_STATUS_OVERFLOW);
}
/*
* 'httpAssembleURIf()' - Assemble a uniform resource identifier from its
* components with a formatted resource.
*
* This function creates a formatted version of the resource string
* argument "resourcef" and escapes reserved characters in the URI
* depending on the value of the "encoding" argument. You should use
* this function in place of traditional string functions whenever
* you need to create a URI string.
*
* @since CUPS 1.2/macOS 10.5@
*/
http_uri_status_t /* O - URI status */
httpAssembleURIf(
http_uri_coding_t encoding, /* I - Encoding flags */
char *uri, /* I - URI buffer */
int urilen, /* I - Size of URI buffer */
const char *scheme, /* I - Scheme name */
const char *username, /* I - Username */
const char *host, /* I - Hostname or address */
int port, /* I - Port number */
const char *resourcef, /* I - Printf-style resource */
...) /* I - Additional arguments as needed */
{
va_list ap; /* Pointer to additional arguments */
char resource[1024]; /* Formatted resource string */
int bytes; /* Bytes in formatted string */
/*
* Range check input...
*/
if (!uri || urilen < 1 || !scheme || port < 0 || !resourcef)
{
if (uri)
*uri = '\0';
return (HTTP_URI_STATUS_BAD_ARGUMENTS);
}
/*
* Format the resource string and assemble the URI...
*/
va_start(ap, resourcef);
bytes = vsnprintf(resource, sizeof(resource), resourcef, ap);
va_end(ap);
if ((size_t)bytes >= sizeof(resource))
{
*uri = '\0';
return (HTTP_URI_STATUS_OVERFLOW);
}
else
return (httpAssembleURI(encoding, uri, urilen, scheme, username, host,
port, resource));
}
/*
* 'httpAssembleUUID()' - Assemble a name-based UUID URN conforming to RFC 4122.
*
* This function creates a unique 128-bit identifying number using the server
* name, port number, random data, and optionally an object name and/or object
* number. The result is formatted as a UUID URN as defined in RFC 4122.
*
* The buffer needs to be at least 46 bytes in size.
*
* @since CUPS 1.7/macOS 10.9@
*/
char * /* I - UUID string */
httpAssembleUUID(const char *server, /* I - Server name */
int port, /* I - Port number */
const char *name, /* I - Object name or NULL */
int number, /* I - Object number or 0 */
char *buffer, /* I - String buffer */
size_t bufsize) /* I - Size of buffer */
{
char data[1024]; /* Source string for MD5 */
unsigned char md5sum[16]; /* MD5 digest/sum */
/*
* Build a version 3 UUID conforming to RFC 4122.
*
* Start with the MD5 sum of the server, port, object name and
* number, and some random data on the end.
*/
snprintf(data, sizeof(data), "%s:%d:%s:%d:%04x:%04x", server,
port, name ? name : server, number,
(unsigned)CUPS_RAND() & 0xffff, (unsigned)CUPS_RAND() & 0xffff);
cupsHashData("md5", (unsigned char *)data, strlen(data), md5sum, sizeof(md5sum));
/*
* Generate the UUID from the MD5...
*/
snprintf(buffer, bufsize,
"urn:uuid:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x",
md5sum[0], md5sum[1], md5sum[2], md5sum[3], md5sum[4], md5sum[5],
(md5sum[6] & 15) | 0x30, md5sum[7], (md5sum[8] & 0x3f) | 0x40,
md5sum[9], md5sum[10], md5sum[11], md5sum[12], md5sum[13],
md5sum[14], md5sum[15]);
return (buffer);
}
/*
* 'httpDecode64()' - Base64-decode a string.
*
* This function is deprecated. Use the httpDecode64_2() function instead
* which provides buffer length arguments.
*
* @deprecated@ @exclude all@
*/
char * /* O - Decoded string */
httpDecode64(char *out, /* I - String to write to */
const char *in) /* I - String to read from */
{
int outlen; /* Output buffer length */
/*
* Use the old maximum buffer size for binary compatibility...
*/
outlen = 512;
return (httpDecode64_2(out, &outlen, in));
}
/*
* 'httpDecode64_2()' - Base64-decode a string.
*
* The caller must initialize "outlen" to the maximum size of the decoded
* string before calling @code httpDecode64_2@. On return "outlen" contains the
* decoded length of the string.
*
* @since CUPS 1.1.21/macOS 10.4@
*/
char * /* O - Decoded string */
httpDecode64_2(char *out, /* I - String to write to */
int *outlen, /* IO - Size of output string */
const char *in) /* I - String to read from */
{
int pos; /* Bit position */
unsigned base64; /* Value of this character */
char *outptr, /* Output pointer */
*outend; /* End of output buffer */
/*
* Range check input...
*/
if (!out || !outlen || *outlen < 1 || !in)
return (NULL);
if (!*in)
{
*out = '\0';
*outlen = 0;
return (out);
}
/*
* Convert from base-64 to bytes...
*/
for (outptr = out, outend = out + *outlen - 1, pos = 0; *in != '\0'; in ++)
{
/*
* Decode this character into a number from 0 to 63...
*/
if (*in >= 'A' && *in <= 'Z')
base64 = (unsigned)(*in - 'A');
else if (*in >= 'a' && *in <= 'z')
base64 = (unsigned)(*in - 'a' + 26);
else if (*in >= '0' && *in <= '9')
base64 = (unsigned)(*in - '0' + 52);
else if (*in == '+')
base64 = 62;
else if (*in == '/')
base64 = 63;
else if (*in == '=')
break;
else
continue;
/*
* Store the result in the appropriate chars...
*/
switch (pos)
{
case 0 :
if (outptr < outend)
*outptr = (char)(base64 << 2);
pos ++;
break;
case 1 :
if (outptr < outend)
*outptr++ |= (char)((base64 >> 4) & 3);
if (outptr < outend)
*outptr = (char)((base64 << 4) & 255);
pos ++;
break;
case 2 :
if (outptr < outend)
*outptr++ |= (char)((base64 >> 2) & 15);
if (outptr < outend)
*outptr = (char)((base64 << 6) & 255);
pos ++;
break;
case 3 :
if (outptr < outend)
*outptr++ |= (char)base64;
pos = 0;
break;
}
}
*outptr = '\0';
/*
* Return the decoded string and size...
*/
*outlen = (int)(outptr - out);
return (out);
}
/*
* 'httpEncode64()' - Base64-encode a string.
*
* This function is deprecated. Use the httpEncode64_2() function instead
* which provides buffer length arguments.
*
* @deprecated@ @exclude all@
*/
char * /* O - Encoded string */
httpEncode64(char *out, /* I - String to write to */
const char *in) /* I - String to read from */
{
return (httpEncode64_2(out, 512, in, (int)strlen(in)));
}
/*
* 'httpEncode64_2()' - Base64-encode a string.
*
* @since CUPS 1.1.21/macOS 10.4@
*/
char * /* O - Encoded string */
httpEncode64_2(char *out, /* I - String to write to */
int outlen, /* I - Maximum size of output string */
const char *in, /* I - String to read from */
int inlen) /* I - Size of input string */
{
char *outptr, /* Output pointer */
*outend; /* End of output buffer */
static const char base64[] = /* Base64 characters... */
{
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789"
"+/"
};
/*
* Range check input...
*/
if (!out || outlen < 1 || !in)
return (NULL);
/*
* Convert bytes to base-64...
*/
for (outptr = out, outend = out + outlen - 1; inlen > 0; in ++, inlen --)
{
/*
* Encode the up to 3 characters as 4 Base64 numbers...
*/
if (outptr < outend)
*outptr ++ = base64[(in[0] & 255) >> 2];
if (outptr < outend)
{
if (inlen > 1)
*outptr ++ = base64[(((in[0] & 255) << 4) | ((in[1] & 255) >> 4)) & 63];
else
*outptr ++ = base64[((in[0] & 255) << 4) & 63];
}
in ++;
inlen --;
if (inlen <= 0)
{
if (outptr < outend)
*outptr ++ = '=';
if (outptr < outend)
*outptr ++ = '=';
break;
}
if (outptr < outend)
{
if (inlen > 1)
*outptr ++ = base64[(((in[0] & 255) << 2) | ((in[1] & 255) >> 6)) & 63];
else
*outptr ++ = base64[((in[0] & 255) << 2) & 63];
}
in ++;
inlen --;
if (inlen <= 0)
{
if (outptr < outend)
*outptr ++ = '=';
break;
}
if (outptr < outend)
*outptr ++ = base64[in[0] & 63];
}
*outptr = '\0';
/*
* Return the encoded string...
*/
return (out);
}
/*
* 'httpGetDateString()' - Get a formatted date/time string from a time value.
*
* @deprecated@ @exclude all@
*/
const char * /* O - Date/time string */
httpGetDateString(time_t t) /* I - Time in seconds */
{
_cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
return (httpGetDateString2(t, cg->http_date, sizeof(cg->http_date)));
}
/*
* 'httpGetDateString2()' - Get a formatted date/time string from a time value.
*
* @since CUPS 1.2/macOS 10.5@
*/
const char * /* O - Date/time string */
httpGetDateString2(time_t t, /* I - Time in seconds */
char *s, /* I - String buffer */
int slen) /* I - Size of string buffer */
{
struct tm *tdate; /* UNIX date/time data */
tdate = gmtime(&t);
if (tdate)
snprintf(s, (size_t)slen, "%s, %02d %s %d %02d:%02d:%02d GMT", http_days[tdate->tm_wday], tdate->tm_mday, http_months[tdate->tm_mon], tdate->tm_year + 1900, tdate->tm_hour, tdate->tm_min, tdate->tm_sec);
else
s[0] = '\0';
return (s);
}
/*
* 'httpGetDateTime()' - Get a time value from a formatted date/time string.
*/
time_t /* O - Time in seconds */
httpGetDateTime(const char *s) /* I - Date/time string */
{
int i; /* Looping var */
char mon[16]; /* Abbreviated month name */
int day, year; /* Day of month and year */
int hour, min, sec; /* Time */
int days; /* Number of days since 1970 */
static const int normal_days[] = /* Days to a month, normal years */
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 };
static const int leap_days[] = /* Days to a month, leap years */
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 };
DEBUG_printf(("2httpGetDateTime(s=\"%s\")", s));
/*
* Extract the date and time from the formatted string...
*/
if (sscanf(s, "%*s%d%15s%d%d:%d:%d", &day, mon, &year, &hour, &min, &sec) < 6)
return (0);
DEBUG_printf(("4httpGetDateTime: day=%d, mon=\"%s\", year=%d, hour=%d, "
"min=%d, sec=%d", day, mon, year, hour, min, sec));
/*
* Convert the month name to a number from 0 to 11.
*/
for (i = 0; i < 12; i ++)
if (!_cups_strcasecmp(mon, http_months[i]))
break;
if (i >= 12)
return (0);
DEBUG_printf(("4httpGetDateTime: i=%d", i));
/*
* Now convert the date and time to a UNIX time value in seconds since
* 1970. We can't use mktime() since the timezone may not be UTC but
* the date/time string *is* UTC.
*/
if ((year & 3) == 0 && ((year % 100) != 0 || (year % 400) == 0))
days = leap_days[i] + day - 1;
else
days = normal_days[i] + day - 1;
DEBUG_printf(("4httpGetDateTime: days=%d", days));
days += (year - 1970) * 365 + /* 365 days per year (normally) */
((year - 1) / 4 - 492) - /* + leap days */
((year - 1) / 100 - 19) + /* - 100 year days */
((year - 1) / 400 - 4); /* + 400 year days */
DEBUG_printf(("4httpGetDateTime: days=%d\n", days));
return (days * 86400 + hour * 3600 + min * 60 + sec);
}
/*
* 'httpSeparate()' - Separate a Universal Resource Identifier into its
* components.
*
* This function is deprecated; use the httpSeparateURI() function instead.
*
* @deprecated@ @exclude all@
*/
void
httpSeparate(const char *uri, /* I - Universal Resource Identifier */
char *scheme, /* O - Scheme [32] (http, https, etc.) */
char *username, /* O - Username [1024] */
char *host, /* O - Hostname [1024] */
int *port, /* O - Port number to use */
char *resource) /* O - Resource/filename [1024] */
{
httpSeparateURI(HTTP_URI_CODING_ALL, uri, scheme, 32, username,
HTTP_MAX_URI, host, HTTP_MAX_URI, port, resource,
HTTP_MAX_URI);
}
/*
* 'httpSeparate2()' - Separate a Universal Resource Identifier into its
* components.
*
* This function is deprecated; use the httpSeparateURI() function instead.
*
* @since CUPS 1.1.21/macOS 10.4@
* @deprecated@ @exclude all@
*/
void
httpSeparate2(const char *uri, /* I - Universal Resource Identifier */
char *scheme, /* O - Scheme (http, https, etc.) */
int schemelen, /* I - Size of scheme buffer */
char *username, /* O - Username */
int usernamelen, /* I - Size of username buffer */
char *host, /* O - Hostname */
int hostlen, /* I - Size of hostname buffer */
int *port, /* O - Port number to use */
char *resource, /* O - Resource/filename */
int resourcelen) /* I - Size of resource buffer */
{
httpSeparateURI(HTTP_URI_CODING_ALL, uri, scheme, schemelen, username,
usernamelen, host, hostlen, port, resource, resourcelen);
}
/*
* 'httpSeparateURI()' - Separate a Universal Resource Identifier into its
* components.
*
* @since CUPS 1.2/macOS 10.5@
*/
http_uri_status_t /* O - Result of separation */
httpSeparateURI(
http_uri_coding_t decoding, /* I - Decoding flags */
const char *uri, /* I - Universal Resource Identifier */
char *scheme, /* O - Scheme (http, https, etc.) */
int schemelen, /* I - Size of scheme buffer */
char *username, /* O - Username */
int usernamelen, /* I - Size of username buffer */
char *host, /* O - Hostname */
int hostlen, /* I - Size of hostname buffer */
int *port, /* O - Port number to use */
char *resource, /* O - Resource/filename */
int resourcelen) /* I - Size of resource buffer */
{
char *ptr, /* Pointer into string... */
*end; /* End of string */
const char *sep; /* Separator character */
http_uri_status_t status; /* Result of separation */
/*
* Initialize everything to blank...
*/
if (scheme && schemelen > 0)
*scheme = '\0';
if (username && usernamelen > 0)
*username = '\0';
if (host && hostlen > 0)
*host = '\0';
if (port)
*port = 0;
if (resource && resourcelen > 0)
*resource = '\0';
/*
* Range check input...
*/
if (!uri || !port || !scheme || schemelen <= 0 || !username ||
usernamelen <= 0 || !host || hostlen <= 0 || !resource ||
resourcelen <= 0)
return (HTTP_URI_STATUS_BAD_ARGUMENTS);
if (!*uri)
return (HTTP_URI_STATUS_BAD_URI);
/*
* Grab the scheme portion of the URI...
*/
status = HTTP_URI_STATUS_OK;
if (!strncmp(uri, "//", 2))
{
/*
* Workaround for HP IPP client bug...
*/
strlcpy(scheme, "ipp", (size_t)schemelen);
status = HTTP_URI_STATUS_MISSING_SCHEME;
}
else if (*uri == '/')
{
/*
* Filename...
*/
strlcpy(scheme, "file", (size_t)schemelen);
status = HTTP_URI_STATUS_MISSING_SCHEME;
}
else
{
/*
* Standard URI with scheme...
*/
for (ptr = scheme, end = scheme + schemelen - 1;
*uri && *uri != ':' && ptr < end;)
if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789-+.", *uri) != NULL)
*ptr++ = *uri++;
else
break;
*ptr = '\0';
if (*uri != ':' || *scheme == '.' || !*scheme)
{
*scheme = '\0';
return (HTTP_URI_STATUS_BAD_SCHEME);
}
uri ++;
}
/*
* Set the default port number...
*/
if (!strcmp(scheme, "http"))
*port = 80;
else if (!strcmp(scheme, "https"))
*port = 443;
else if (!strcmp(scheme, "ipp") || !strcmp(scheme, "ipps"))
*port = 631;
else if (!_cups_strcasecmp(scheme, "lpd"))
*port = 515;
else if (!strcmp(scheme, "socket")) /* Not yet registered with IANA... */
*port = 9100;
else if (strcmp(scheme, "file") && strcmp(scheme, "mailto") && strcmp(scheme, "tel"))
status = HTTP_URI_STATUS_UNKNOWN_SCHEME;
/*
* Now see if we have a hostname...
*/
if (!strncmp(uri, "//", 2))
{
/*
* Yes, extract it...
*/
uri += 2;
/*
* Grab the username, if any...
*/
if ((sep = strpbrk(uri, "@/")) != NULL && *sep == '@')
{
/*
* Get a username:password combo...
*/
uri = http_copy_decode(username, uri, usernamelen, "@",
decoding & HTTP_URI_CODING_USERNAME);
if (!uri)
{
*username = '\0';
return (HTTP_URI_STATUS_BAD_USERNAME);
}
uri ++;
}
/*
* Then the hostname/IP address...
*/
if (*uri == '[')
{
/*
* Grab IPv6 address...
*/
uri ++;
if (*uri == 'v')
{
/*
* Skip IPvFuture ("vXXXX.") prefix...
*/
uri ++;
while (isxdigit(*uri & 255))
uri ++;
if (*uri != '.')
{
*host = '\0';
return (HTTP_URI_STATUS_BAD_HOSTNAME);
}
uri ++;
}
uri = http_copy_decode(host, uri, hostlen, "]",
decoding & HTTP_URI_CODING_HOSTNAME);
if (!uri)
{
*host = '\0';
return (HTTP_URI_STATUS_BAD_HOSTNAME);
}
/*
* Validate value...
*/
if (*uri != ']')
{
*host = '\0';
return (HTTP_URI_STATUS_BAD_HOSTNAME);
}
uri ++;
for (ptr = host; *ptr; ptr ++)
if (*ptr == '+')
{
/*
* Convert zone separator to % and stop here...
*/
*ptr = '%';
break;
}
else if (*ptr == '%')
{
/*
* Stop at zone separator (RFC 6874)
*/
break;
}
else if (*ptr != ':' && *ptr != '.' && !isxdigit(*ptr & 255))
{
*host = '\0';
return (HTTP_URI_STATUS_BAD_HOSTNAME);
}
}
else
{
/*
* Validate the hostname or IPv4 address first...
*/
for (ptr = (char *)uri; *ptr; ptr ++)
if (strchr(":?/", *ptr))
break;
else if (!strchr("abcdefghijklmnopqrstuvwxyz" /* unreserved */
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" /* unreserved */
"0123456789" /* unreserved */
"-._~" /* unreserved */
"%" /* pct-encoded */
"!$&'()*+,;=" /* sub-delims */
"\\", *ptr)) /* SMB domain */
{
*host = '\0';
return (HTTP_URI_STATUS_BAD_HOSTNAME);
}
/*
* Then copy the hostname or IPv4 address to the buffer...
*/
uri = http_copy_decode(host, uri, hostlen, ":?/",
decoding & HTTP_URI_CODING_HOSTNAME);
if (!uri)
{
*host = '\0';
return (HTTP_URI_STATUS_BAD_HOSTNAME);
}
}
/*
* Validate hostname for file scheme - only empty and localhost are
* acceptable.
*/
if (!strcmp(scheme, "file") && strcmp(host, "localhost") && host[0])
{
*host = '\0';
return (HTTP_URI_STATUS_BAD_HOSTNAME);
}
/*
* See if we have a port number...
*/
if (*uri == ':')
{
/*
* Yes, collect the port number...
*/
if (!isdigit(uri[1] & 255))
{
*port = 0;
return (HTTP_URI_STATUS_BAD_PORT);
}
*port = (int)strtol(uri + 1, (char **)&uri, 10);
if (*port <= 0 || *port > 65535)
{
*port = 0;
return (HTTP_URI_STATUS_BAD_PORT);
}
if (*uri != '/' && *uri)
{
*port = 0;
return (HTTP_URI_STATUS_BAD_PORT);
}
}
}
/*
* The remaining portion is the resource string...
*/
if (*uri == '?' || !*uri)
{
/*
* Hostname but no path...
*/
status = HTTP_URI_STATUS_MISSING_RESOURCE;
*resource = '/';
/*
* Copy any query string...
*/
if (*uri == '?')
uri = http_copy_decode(resource + 1, uri, resourcelen - 1, NULL,
decoding & HTTP_URI_CODING_QUERY);
else
resource[1] = '\0';
}
else
{
uri = http_copy_decode(resource, uri, resourcelen, "?",
decoding & HTTP_URI_CODING_RESOURCE);
if (uri && *uri == '?')
{
/*
* Concatenate any query string...
*/
char *resptr = resource + strlen(resource);
uri = http_copy_decode(resptr, uri,
resourcelen - (int)(resptr - resource), NULL,
decoding & HTTP_URI_CODING_QUERY);
}
}
if (!uri)
{
*resource = '\0';
return (HTTP_URI_STATUS_BAD_RESOURCE);
}
/*
* Return the URI separation status...
*/
return (status);
}
/*
* '_httpSetDigestAuthString()' - Calculate a Digest authentication response
* using the appropriate RFC 2068/2617/7616
* algorithm.
*/
int /* O - 1 on success, 0 on failure */
_httpSetDigestAuthString(
http_t *http, /* I - HTTP connection */
const char *nonce, /* I - Nonce value */
const char *method, /* I - HTTP method */
const char *resource) /* I - HTTP resource path */
{
char kd[65], /* Final MD5/SHA-256 digest */
ha1[65], /* Hash of username:realm:password */
ha2[65], /* Hash of method:request-uri */
username[HTTP_MAX_VALUE],
/* username:password */
*password, /* Pointer to password */
temp[1024], /* Temporary string */
digest[1024]; /* Digest auth data */
unsigned char hash[32]; /* Hash buffer */
size_t hashsize; /* Size of hash */
DEBUG_printf(("2_httpSetDigestAuthString(http=%p, nonce=\"%s\", method=\"%s\", resource=\"%s\")", http, nonce, method, resource));
if (nonce && *nonce && strcmp(nonce, http->nonce))
{
strlcpy(http->nonce, nonce, sizeof(http->nonce));
if (nonce == http->nextnonce)
http->nextnonce[0] = '\0';
http->nonce_count = 1;
}
else
http->nonce_count ++;
strlcpy(username, http->userpass, sizeof(username));
if ((password = strchr(username, ':')) != NULL)
*password++ = '\0';
else
return (0);
if (http->algorithm[0])
{
/*
* Follow RFC 2617/7616...
*/
int i; /* Looping var */
char cnonce[65]; /* cnonce value */
const char *hashalg; /* Hashing algorithm */
for (i = 0; i < 64; i ++)
cnonce[i] = "0123456789ABCDEF"[CUPS_RAND() & 15];
cnonce[64] = '\0';
if (!_cups_strcasecmp(http->algorithm, "MD5"))
{
/*
* RFC 2617 Digest with MD5
*/
hashalg = "md5";
}
else if (!_cups_strcasecmp(http->algorithm, "SHA-256"))
{
/*
* RFC 7616 Digest with SHA-256
*/
hashalg = "sha2-256";
}
else
{
/*
* Some other algorithm we don't support, skip this one...
*/
return (0);
}
/*
* Calculate digest value...
*/
/* H(A1) = H(username:realm:password) */
snprintf(temp, sizeof(temp), "%s:%s:%s", username, http->realm, password);
hashsize = (size_t)cupsHashData(hashalg, (unsigned char *)temp, strlen(temp), hash, sizeof(hash));
cupsHashString(hash, hashsize, ha1, sizeof(ha1));
/* H(A2) = H(method:uri) */
snprintf(temp, sizeof(temp), "%s:%s", method, resource);
hashsize = (size_t)cupsHashData(hashalg, (unsigned char *)temp, strlen(temp), hash, sizeof(hash));
cupsHashString(hash, hashsize, ha2, sizeof(ha2));
/* KD = H(H(A1):nonce:nc:cnonce:qop:H(A2)) */
snprintf(temp, sizeof(temp), "%s:%s:%08x:%s:%s:%s", ha1, http->nonce, http->nonce_count, cnonce, "auth", ha2);
hashsize = (size_t)cupsHashData(hashalg, (unsigned char *)temp, strlen(temp), hash, sizeof(hash));
cupsHashString(hash, hashsize, kd, sizeof(kd));
/*
* Pass the RFC 2617/7616 WWW-Authenticate header...
*/
if (http->opaque[0])
snprintf(digest, sizeof(digest), "username=\"%s\", realm=\"%s\", nonce=\"%s\", algorithm=%s, qop=auth, opaque=\"%s\", cnonce=\"%s\", nc=%08x, uri=\"%s\", response=\"%s\"", cupsUser(), http->realm, http->nonce, http->algorithm, http->opaque, cnonce, http->nonce_count, resource, kd);
else
snprintf(digest, sizeof(digest), "username=\"%s\", realm=\"%s\", nonce=\"%s\", algorithm=%s, qop=auth, cnonce=\"%s\", nc=%08x, uri=\"%s\", response=\"%s\"", username, http->realm, http->nonce, http->algorithm, cnonce, http->nonce_count, resource, kd);
}
else
{
/*
* Use old RFC 2069 Digest method...
*/
/* H(A1) = H(username:realm:password) */
snprintf(temp, sizeof(temp), "%s:%s:%s", username, http->realm, password);
hashsize = (size_t)cupsHashData("md5", (unsigned char *)temp, strlen(temp), hash, sizeof(hash));
cupsHashString(hash, hashsize, ha1, sizeof(ha1));
/* H(A2) = H(method:uri) */
snprintf(temp, sizeof(temp), "%s:%s", method, resource);
hashsize = (size_t)cupsHashData("md5", (unsigned char *)temp, strlen(temp), hash, sizeof(hash));
cupsHashString(hash, hashsize, ha2, sizeof(ha2));
/* KD = H(H(A1):nonce:H(A2)) */
snprintf(temp, sizeof(temp), "%s:%s:%s", ha1, http->nonce, ha2);
hashsize = (size_t)cupsHashData("md5", (unsigned char *)temp, strlen(temp), hash, sizeof(hash));
cupsHashString(hash, hashsize, kd, sizeof(kd));
/*
* Pass the old RFC 2069 WWW-Authenticate header...
*/
snprintf(digest, sizeof(digest), "username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"", username, http->realm, http->nonce, resource, kd);
}
httpSetAuthString(http, "Digest", digest);
return (1);
}
/*
* 'httpStateString()' - Return the string describing a HTTP state value.
*
* @since CUPS 2.0/OS 10.10@
*/
const char * /* O - State string */
httpStateString(http_state_t state) /* I - HTTP state value */
{
if (state < HTTP_STATE_ERROR || state > HTTP_STATE_UNKNOWN_VERSION)
return ("HTTP_STATE_???");
else
return (http_states[state - HTTP_STATE_ERROR]);
}
/*
* '_httpStatus()' - Return the localized string describing a HTTP status code.
*
* The returned string is localized using the passed message catalog.
*/
const char * /* O - Localized status string */
_httpStatus(cups_lang_t *lang, /* I - Language */
http_status_t status) /* I - HTTP status code */
{
const char *s; /* Status string */
switch (status)
{
case HTTP_STATUS_ERROR :
s = strerror(errno);
break;
case HTTP_STATUS_CONTINUE :
s = _("Continue");
break;
case HTTP_STATUS_SWITCHING_PROTOCOLS :
s = _("Switching Protocols");
break;
case HTTP_STATUS_OK :
s = _("OK");
break;
case HTTP_STATUS_CREATED :
s = _("Created");
break;
case HTTP_STATUS_ACCEPTED :
s = _("Accepted");
break;
case HTTP_STATUS_NO_CONTENT :
s = _("No Content");
break;
case HTTP_STATUS_MOVED_PERMANENTLY :
s = _("Moved Permanently");
break;
case HTTP_STATUS_FOUND :
s = _("Found");
break;
case HTTP_STATUS_SEE_OTHER :
s = _("See Other");
break;
case HTTP_STATUS_NOT_MODIFIED :
s = _("Not Modified");
break;
case HTTP_STATUS_BAD_REQUEST :
s = _("Bad Request");
break;
case HTTP_STATUS_UNAUTHORIZED :
case HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED :
s = _("Unauthorized");
break;
case HTTP_STATUS_FORBIDDEN :
s = _("Forbidden");
break;
case HTTP_STATUS_NOT_FOUND :
s = _("Not Found");
break;
case HTTP_STATUS_REQUEST_TOO_LARGE :
s = _("Request Entity Too Large");
break;
case HTTP_STATUS_URI_TOO_LONG :
s = _("URI Too Long");
break;
case HTTP_STATUS_UPGRADE_REQUIRED :
s = _("Upgrade Required");
break;
case HTTP_STATUS_NOT_IMPLEMENTED :
s = _("Not Implemented");
break;
case HTTP_STATUS_NOT_SUPPORTED :
s = _("Not Supported");
break;
case HTTP_STATUS_EXPECTATION_FAILED :
s = _("Expectation Failed");
break;
case HTTP_STATUS_SERVICE_UNAVAILABLE :
s = _("Service Unavailable");
break;
case HTTP_STATUS_SERVER_ERROR :
s = _("Internal Server Error");
break;
case HTTP_STATUS_CUPS_PKI_ERROR :
s = _("SSL/TLS Negotiation Error");
break;
case HTTP_STATUS_CUPS_WEBIF_DISABLED :
s = _("Web Interface is Disabled");
break;
default :
s = _("Unknown");
break;
}
return (_cupsLangString(lang, s));
}
/*
* 'httpStatus()' - Return a short string describing a HTTP status code.
*
* The returned string is localized to the current POSIX locale and is based
* on the status strings defined in RFC 7231.
*/
const char * /* O - Localized status string */
httpStatus(http_status_t status) /* I - HTTP status code */
{
_cups_globals_t *cg = _cupsGlobals(); /* Global data */
if (!cg->lang_default)
cg->lang_default = cupsLangDefault();
return (_httpStatus(cg->lang_default, status));
}
/*
* 'httpURIStatusString()' - Return a string describing a URI status code.
*
* @since CUPS 2.0/OS 10.10@
*/
const char * /* O - Localized status string */
httpURIStatusString(
http_uri_status_t status) /* I - URI status code */
{
const char *s; /* Status string */
_cups_globals_t *cg = _cupsGlobals(); /* Global data */
if (!cg->lang_default)
cg->lang_default = cupsLangDefault();
switch (status)
{
case HTTP_URI_STATUS_OVERFLOW :
s = _("URI too large");
break;
case HTTP_URI_STATUS_BAD_ARGUMENTS :
s = _("Bad arguments to function");
break;
case HTTP_URI_STATUS_BAD_RESOURCE :
s = _("Bad resource in URI");
break;
case HTTP_URI_STATUS_BAD_PORT :
s = _("Bad port number in URI");
break;
case HTTP_URI_STATUS_BAD_HOSTNAME :
s = _("Bad hostname/address in URI");
break;
case HTTP_URI_STATUS_BAD_USERNAME :
s = _("Bad username in URI");
break;
case HTTP_URI_STATUS_BAD_SCHEME :
s = _("Bad scheme in URI");
break;
case HTTP_URI_STATUS_BAD_URI :
s = _("Bad/empty URI");
break;
case HTTP_URI_STATUS_OK :
s = _("OK");
break;
case HTTP_URI_STATUS_MISSING_SCHEME :
s = _("Missing scheme in URI");
break;
case HTTP_URI_STATUS_UNKNOWN_SCHEME :
s = _("Unknown scheme in URI");
break;
case HTTP_URI_STATUS_MISSING_RESOURCE :
s = _("Missing resource in URI");
break;
default:
s = _("Unknown");
break;
}
return (_cupsLangString(cg->lang_default, s));
}
#ifndef HAVE_HSTRERROR
/*
* '_cups_hstrerror()' - hstrerror() emulation function for Solaris and others.
*/
const char * /* O - Error string */
_cups_hstrerror(int error) /* I - Error number */
{
static const char * const errors[] = /* Error strings */
{
"OK",
"Host not found.",
"Try again.",
"Unrecoverable lookup error.",
"No data associated with name."
};
if (error < 0 || error > 4)
return ("Unknown hostname lookup error.");
else
return (errors[error]);
}
#endif /* !HAVE_HSTRERROR */
/*
* '_httpDecodeURI()' - Percent-decode a HTTP request URI.
*/
char * /* O - Decoded URI or NULL on error */
_httpDecodeURI(char *dst, /* I - Destination buffer */
const char *src, /* I - Source URI */
size_t dstsize) /* I - Size of destination buffer */
{
if (http_copy_decode(dst, src, (int)dstsize, NULL, 1))
return (dst);
else
return (NULL);
}
/*
* '_httpEncodeURI()' - Percent-encode a HTTP request URI.
*/
char * /* O - Encoded URI */
_httpEncodeURI(char *dst, /* I - Destination buffer */
const char *src, /* I - Source URI */
size_t dstsize) /* I - Size of destination buffer */
{
http_copy_encode(dst, src, dst + dstsize - 1, NULL, NULL, 1);
return (dst);
}
/*
* '_httpResolveURI()' - Resolve a DNS-SD URI.
*/
const char * /* O - Resolved URI */
_httpResolveURI(
const char *uri, /* I - DNS-SD URI */
char *resolved_uri, /* I - Buffer for resolved URI */
size_t resolved_size, /* I - Size of URI buffer */
int options, /* I - Resolve options */
int (*cb)(void *context), /* I - Continue callback function */
void *context) /* I - Context pointer for callback */
{
char scheme[32], /* URI components... */
userpass[256],
hostname[1024],
resource[1024];
int port;
#ifdef DEBUG
http_uri_status_t status; /* URI decode status */
#endif /* DEBUG */
DEBUG_printf(("_httpResolveURI(uri=\"%s\", resolved_uri=%p, resolved_size=" CUPS_LLFMT ", options=0x%x, cb=%p, context=%p)", uri, (void *)resolved_uri, CUPS_LLCAST resolved_size, options, (void *)cb, context));
/*
* Get the device URI...
*/
#ifdef DEBUG
if ((status = httpSeparateURI(HTTP_URI_CODING_ALL, uri, scheme,
sizeof(scheme), userpass, sizeof(userpass),
hostname, sizeof(hostname), &port, resource,
sizeof(resource))) < HTTP_URI_STATUS_OK)
#else
if (httpSeparateURI(HTTP_URI_CODING_ALL, uri, scheme,
sizeof(scheme), userpass, sizeof(userpass),
hostname, sizeof(hostname), &port, resource,
sizeof(resource)) < HTTP_URI_STATUS_OK)
#endif /* DEBUG */
{
if (options & _HTTP_RESOLVE_STDERR)
_cupsLangPrintFilter(stderr, "ERROR", _("Bad device-uri \"%s\"."), uri);
DEBUG_printf(("2_httpResolveURI: httpSeparateURI returned %d!", status));
DEBUG_puts("2_httpResolveURI: Returning NULL");
return (NULL);
}
/*
* Resolve it as needed...
*/
if (strstr(hostname, "._tcp"))
{
#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
char *regtype, /* Pointer to type in hostname */
*domain, /* Pointer to domain in hostname */
*uuid, /* Pointer to UUID in URI */
*uuidend; /* Pointer to end of UUID in URI */
_http_uribuf_t uribuf; /* URI buffer */
int offline = 0; /* offline-report state set? */
# ifdef HAVE_DNSSD
DNSServiceRef ref, /* DNS-SD master service reference */
domainref = NULL,/* DNS-SD service reference for domain */
ippref = NULL, /* DNS-SD service reference for network IPP */
ippsref = NULL, /* DNS-SD service reference for network IPPS */
localref; /* DNS-SD service reference for .local */
int extrasent = 0; /* Send the domain/IPP/IPPS resolves? */
# ifdef HAVE_POLL
struct pollfd polldata; /* Polling data */
# else /* select() */
fd_set input_set; /* Input set for select() */
struct timeval stimeout; /* Timeout value for select() */
# endif /* HAVE_POLL */
# elif defined(HAVE_AVAHI)
AvahiClient *client; /* Client information */
int error; /* Status */
# endif /* HAVE_DNSSD */
if (options & _HTTP_RESOLVE_STDERR)
fprintf(stderr, "DEBUG: Resolving \"%s\"...\n", hostname);
/*
* Separate the hostname into service name, registration type, and domain...
*/
for (regtype = strstr(hostname, "._tcp") - 2;
regtype > hostname;
regtype --)
if (regtype[0] == '.' && regtype[1] == '_')
{
/*
* Found ._servicetype in front of ._tcp...
*/
*regtype++ = '\0';
break;
}
if (regtype <= hostname)
{
DEBUG_puts("2_httpResolveURI: Bad hostname, returning NULL");
return (NULL);
}
for (domain = strchr(regtype, '.');
domain;
domain = strchr(domain + 1, '.'))
if (domain[1] != '_')
break;
if (domain)
*domain++ = '\0';
if ((uuid = strstr(resource, "?uuid=")) != NULL)
{
*uuid = '\0';
uuid += 6;
if ((uuidend = strchr(uuid, '&')) != NULL)
*uuidend = '\0';
}
resolved_uri[0] = '\0';
uribuf.buffer = resolved_uri;
uribuf.bufsize = resolved_size;
uribuf.options = options;
uribuf.resource = resource;
uribuf.uuid = uuid;
DEBUG_printf(("2_httpResolveURI: Resolving hostname=\"%s\", regtype=\"%s\", "
"domain=\"%s\"\n", hostname, regtype, domain));
if (options & _HTTP_RESOLVE_STDERR)
{
fputs("STATE: +connecting-to-device\n", stderr);
fprintf(stderr, "DEBUG: Resolving \"%s\", regtype=\"%s\", "
"domain=\"local.\"...\n", hostname, regtype);
}
uri = NULL;
# ifdef HAVE_DNSSD
if (DNSServiceCreateConnection(&ref) == kDNSServiceErr_NoError)
{
uint32_t myinterface = kDNSServiceInterfaceIndexAny;
/* Lookup on any interface */
if (!strcmp(scheme, "ippusb"))
myinterface = kDNSServiceInterfaceIndexLocalOnly;
localref = ref;
if (DNSServiceResolve(&localref,
kDNSServiceFlagsShareConnection, myinterface,
hostname, regtype, "local.", http_resolve_cb,
&uribuf) == kDNSServiceErr_NoError)
{
int fds; /* Number of ready descriptors */
time_t timeout, /* Poll timeout */
start_time = time(NULL),/* Start time */
end_time = start_time + 90;
/* End time */
while (time(NULL) < end_time)
{
if (options & _HTTP_RESOLVE_STDERR)
_cupsLangPrintFilter(stderr, "INFO", _("Looking for printer."));
if (cb && !(*cb)(context))
{
DEBUG_puts("2_httpResolveURI: callback returned 0 (stop)");
break;
}
/*
* Wakeup every 2 seconds to emit a "looking for printer" message...
*/
if ((timeout = end_time - time(NULL)) > 2)
timeout = 2;
# ifdef HAVE_POLL
polldata.fd = DNSServiceRefSockFD(ref);
polldata.events = POLLIN;
fds = poll(&polldata, 1, (int)(1000 * timeout));
# else /* select() */
FD_ZERO(&input_set);
FD_SET(DNSServiceRefSockFD(ref), &input_set);
# ifdef _WIN32
stimeout.tv_sec = (long)timeout;
# else
stimeout.tv_sec = timeout;
# endif /* _WIN32 */
stimeout.tv_usec = 0;
fds = select(DNSServiceRefSockFD(ref)+1, &input_set, NULL, NULL,
&stimeout);
# endif /* HAVE_POLL */
if (fds < 0)
{
if (errno != EINTR && errno != EAGAIN)
{
DEBUG_printf(("2_httpResolveURI: poll error: %s", strerror(errno)));
break;
}
}
else if (fds == 0)
{
/*
* Wait 2 seconds for a response to the local resolve; if nothing
* comes in, do an additional domain resolution...
*/
if (extrasent == 0 && domain && _cups_strcasecmp(domain, "local."))
{
if (options & _HTTP_RESOLVE_STDERR)
fprintf(stderr,
"DEBUG: Resolving \"%s\", regtype=\"%s\", "
"domain=\"%s\"...\n", hostname, regtype,
domain ? domain : "");
domainref = ref;
if (DNSServiceResolve(&domainref,
kDNSServiceFlagsShareConnection,
myinterface, hostname, regtype, domain,
http_resolve_cb,
&uribuf) == kDNSServiceErr_NoError)
extrasent = 1;
}
else if (extrasent == 0 && !strcmp(scheme, "ippusb"))
{
if (options & _HTTP_RESOLVE_STDERR)
fprintf(stderr, "DEBUG: Resolving \"%s\", regtype=\"_ipps._tcp\", domain=\"local.\"...\n", hostname);
ippsref = ref;
if (DNSServiceResolve(&ippsref,
kDNSServiceFlagsShareConnection,
kDNSServiceInterfaceIndexAny, hostname,
"_ipps._tcp", domain, http_resolve_cb,
&uribuf) == kDNSServiceErr_NoError)
extrasent = 1;
}
else if (extrasent == 1 && !strcmp(scheme, "ippusb"))
{
if (options & _HTTP_RESOLVE_STDERR)
fprintf(stderr, "DEBUG: Resolving \"%s\", regtype=\"_ipp._tcp\", domain=\"local.\"...\n", hostname);
ippref = ref;
if (DNSServiceResolve(&ippref,
kDNSServiceFlagsShareConnection,
kDNSServiceInterfaceIndexAny, hostname,
"_ipp._tcp", domain, http_resolve_cb,
&uribuf) == kDNSServiceErr_NoError)
extrasent = 2;
}
/*
* If it hasn't resolved within 5 seconds set the offline-report
* printer-state-reason...
*/
if ((options & _HTTP_RESOLVE_STDERR) && offline == 0 &&
time(NULL) > (start_time + 5))
{
fputs("STATE: +offline-report\n", stderr);
offline = 1;
}
}
else
{
if (DNSServiceProcessResult(ref) == kDNSServiceErr_NoError &&
resolved_uri[0])
{
uri = resolved_uri;
break;
}
}
}
if (extrasent)
{
if (domainref)
DNSServiceRefDeallocate(domainref);
if (ippref)
DNSServiceRefDeallocate(ippref);
if (ippsref)
DNSServiceRefDeallocate(ippsref);
}
DNSServiceRefDeallocate(localref);
}
DNSServiceRefDeallocate(ref);
}
# else /* HAVE_AVAHI */
if ((uribuf.poll = avahi_simple_poll_new()) != NULL)
{
avahi_simple_poll_set_func(uribuf.poll, http_poll_cb, NULL);
if ((client = avahi_client_new(avahi_simple_poll_get(uribuf.poll),
0, http_client_cb,
&uribuf, &error)) != NULL)
{
if (avahi_service_resolver_new(client, AVAHI_IF_UNSPEC,
AVAHI_PROTO_UNSPEC, hostname,
regtype, "local.", AVAHI_PROTO_UNSPEC, 0,
http_resolve_cb, &uribuf) != NULL)
{
time_t start_time = time(NULL),
/* Start time */
end_time = start_time + 90;
/* End time */
int pstatus; /* Poll status */
pstatus = avahi_simple_poll_iterate(uribuf.poll, 2000);
if (pstatus == 0 && !resolved_uri[0] && domain &&
_cups_strcasecmp(domain, "local."))
{
/*
* Resolve for .local hasn't returned anything, try the listed
* domain...
*/
avahi_service_resolver_new(client, AVAHI_IF_UNSPEC,
AVAHI_PROTO_UNSPEC, hostname,
regtype, domain, AVAHI_PROTO_UNSPEC, 0,
http_resolve_cb, &uribuf);
}
while (!pstatus && !resolved_uri[0] && time(NULL) < end_time)
{
if ((pstatus = avahi_simple_poll_iterate(uribuf.poll, 2000)) != 0)
break;
/*
* If it hasn't resolved within 5 seconds set the offline-report
* printer-state-reason...
*/
if ((options & _HTTP_RESOLVE_STDERR) && offline == 0 &&
time(NULL) > (start_time + 5))
{
fputs("STATE: +offline-report\n", stderr);
offline = 1;
}
}
/*
* Collect the result (if we got one).
*/
if (resolved_uri[0])
uri = resolved_uri;
}
avahi_client_free(client);
}
avahi_simple_poll_free(uribuf.poll);
}
# endif /* HAVE_DNSSD */
if (options & _HTTP_RESOLVE_STDERR)
{
if (uri)
{
fprintf(stderr, "DEBUG: Resolved as \"%s\"...\n", uri);
fputs("STATE: -connecting-to-device,offline-report\n", stderr);
}
else
{
fputs("DEBUG: Unable to resolve URI\n", stderr);
fputs("STATE: -connecting-to-device\n", stderr);
}
}
#else /* HAVE_DNSSD || HAVE_AVAHI */
/*
* No DNS-SD support...
*/
uri = NULL;
#endif /* HAVE_DNSSD || HAVE_AVAHI */
if ((options & _HTTP_RESOLVE_STDERR) && !uri)
_cupsLangPrintFilter(stderr, "INFO", _("Unable to find printer."));
}
else
{
/*
* Nothing more to do...
*/
strlcpy(resolved_uri, uri, resolved_size);
uri = resolved_uri;
}
DEBUG_printf(("2_httpResolveURI: Returning \"%s\"", uri));
return (uri);
}
#ifdef HAVE_AVAHI
/*
* 'http_client_cb()' - Client callback for resolving URI.
*/
static void
http_client_cb(
AvahiClient *client, /* I - Client information */
AvahiClientState state, /* I - Current state */
void *context) /* I - Pointer to URI buffer */
{
DEBUG_printf(("7http_client_cb(client=%p, state=%d, context=%p)", client,
state, context));
/*
* If the connection drops, quit.
*/
if (state == AVAHI_CLIENT_FAILURE)
{
_http_uribuf_t *uribuf = (_http_uribuf_t *)context;
/* URI buffer */
avahi_simple_poll_quit(uribuf->poll);
}
}
#endif /* HAVE_AVAHI */
/*
* 'http_copy_decode()' - Copy and decode a URI.
*/
static const char * /* O - New source pointer or NULL on error */
http_copy_decode(char *dst, /* O - Destination buffer */
const char *src, /* I - Source pointer */
int dstsize, /* I - Destination size */
const char *term, /* I - Terminating characters */
int decode) /* I - Decode %-encoded values */
{
char *ptr, /* Pointer into buffer */
*end; /* End of buffer */
int quoted; /* Quoted character */
/*
* Copy the src to the destination until we hit a terminating character
* or the end of the string.
*/
for (ptr = dst, end = dst + dstsize - 1;
*src && (!term || !strchr(term, *src));
src ++)
if (ptr < end)
{
if (*src == '%' && decode)
{
if (isxdigit(src[1] & 255) && isxdigit(src[2] & 255))
{
/*
* Grab a hex-encoded character...
*/
src ++;
if (isalpha(*src))
quoted = (tolower(*src) - 'a' + 10) << 4;
else
quoted = (*src - '0') << 4;
src ++;
if (isalpha(*src))
quoted |= tolower(*src) - 'a' + 10;
else
quoted |= *src - '0';
*ptr++ = (char)quoted;
}
else
{
/*
* Bad hex-encoded character...
*/
*ptr = '\0';
return (NULL);
}
}
else if ((*src & 255) <= 0x20 || (*src & 255) >= 0x7f)
{
*ptr = '\0';
return (NULL);
}
else
*ptr++ = *src;
}
*ptr = '\0';
return (src);
}
/*
* 'http_copy_encode()' - Copy and encode a URI.
*/
static char * /* O - End of current URI */
http_copy_encode(char *dst, /* O - Destination buffer */
const char *src, /* I - Source pointer */
char *dstend, /* I - End of destination buffer */
const char *reserved, /* I - Extra reserved characters */
const char *term, /* I - Terminating characters */
int encode) /* I - %-encode reserved chars? */
{
static const char hex[] = "0123456789ABCDEF";
while (*src && dst < dstend)
{
if (term && *src == *term)
return (dst);
if (encode && (*src == '%' || *src <= ' ' || *src & 128 ||
(reserved && strchr(reserved, *src))))
{
/*
* Hex encode reserved characters...
*/
if ((dst + 2) >= dstend)
break;
*dst++ = '%';
*dst++ = hex[(*src >> 4) & 15];
*dst++ = hex[*src & 15];
src ++;
}
else
*dst++ = *src++;
}
*dst = '\0';
if (*src)
return (NULL);
else
return (dst);
}
#ifdef HAVE_DNSSD
/*
* 'http_resolve_cb()' - Build a device URI for the given service name.
*/
static void DNSSD_API
http_resolve_cb(
DNSServiceRef sdRef, /* I - Service reference */
DNSServiceFlags flags, /* I - Results flags */
uint32_t interfaceIndex, /* I - Interface number */
DNSServiceErrorType errorCode, /* I - Error, if any */
const char *fullName, /* I - Full service name */
const char *hostTarget, /* I - Hostname */
uint16_t port, /* I - Port number */
uint16_t txtLen, /* I - Length of TXT record */
const unsigned char *txtRecord, /* I - TXT record data */
void *context) /* I - Pointer to URI buffer */
{
_http_uribuf_t *uribuf = (_http_uribuf_t *)context;
/* URI buffer */
const char *scheme, /* URI scheme */
*hostptr, /* Pointer into hostTarget */
*reskey, /* "rp" or "rfo" */
*resdefault; /* Default path */
char resource[257], /* Remote path */
fqdn[256]; /* FQDN of the .local name */
const void *value; /* Value from TXT record */
uint8_t valueLen; /* Length of value */
DEBUG_printf(("4http_resolve_cb(sdRef=%p, flags=%x, interfaceIndex=%u, errorCode=%d, fullName=\"%s\", hostTarget=\"%s\", port=%u, txtLen=%u, txtRecord=%p, context=%p)", (void *)sdRef, flags, interfaceIndex, errorCode, fullName, hostTarget, port, txtLen, (void *)txtRecord, context));
/*
* If we have a UUID, compare it...
*/
if (uribuf->uuid &&
(value = TXTRecordGetValuePtr(txtLen, txtRecord, "UUID",
&valueLen)) != NULL)
{
char uuid[256]; /* UUID value */
memcpy(uuid, value, valueLen);
uuid[valueLen] = '\0';
if (_cups_strcasecmp(uuid, uribuf->uuid))
{
if (uribuf->options & _HTTP_RESOLVE_STDERR)
fprintf(stderr, "DEBUG: Found UUID %s, looking for %s.", uuid,
uribuf->uuid);
DEBUG_printf(("5http_resolve_cb: Found UUID %s, looking for %s.", uuid,
uribuf->uuid));
return;
}
}
/*
* Figure out the scheme from the full name...
*/
if (strstr(fullName, "._ipps") || strstr(fullName, "._ipp-tls"))
scheme = "ipps";
else if (strstr(fullName, "._ipp") || strstr(fullName, "._fax-ipp"))
scheme = "ipp";
else if (strstr(fullName, "._http."))
scheme = "http";
else if (strstr(fullName, "._https."))
scheme = "https";
else if (strstr(fullName, "._printer."))
scheme = "lpd";
else if (strstr(fullName, "._pdl-datastream."))
scheme = "socket";
else
scheme = "riousbprint";
/*
* Extract the "remote printer" key from the TXT record...
*/
if ((uribuf->options & _HTTP_RESOLVE_FAXOUT) &&
(!strcmp(scheme, "ipp") || !strcmp(scheme, "ipps")) &&
!TXTRecordGetValuePtr(txtLen, txtRecord, "printer-type", &valueLen))
{
reskey = "rfo";
resdefault = "/ipp/faxout";
}
else
{
reskey = "rp";
resdefault = "/";
}
if ((value = TXTRecordGetValuePtr(txtLen, txtRecord, reskey,
&valueLen)) != NULL)
{
if (((char *)value)[0] == '/')
{
/*
* Value (incorrectly) has a leading slash already...
*/
memcpy(resource, value, valueLen);
resource[valueLen] = '\0';
}
else
{
/*
* Convert to resource by concatenating with a leading "/"...
*/
resource[0] = '/';
memcpy(resource + 1, value, valueLen);
resource[valueLen + 1] = '\0';
}
}
else
{
/*
* Use the default value...
*/
strlcpy(resource, resdefault, sizeof(resource));
}
/*
* Lookup the FQDN if needed...
*/
if ((uribuf->options & _HTTP_RESOLVE_FQDN) &&
(hostptr = hostTarget + strlen(hostTarget) - 7) > hostTarget &&
!_cups_strcasecmp(hostptr, ".local."))
{
/*
* OK, we got a .local name but the caller needs a real domain. Start by
* getting the IP address of the .local name and then do reverse-lookups...
*/
http_addrlist_t *addrlist, /* List of addresses */
*addr; /* Current address */
DEBUG_printf(("5http_resolve_cb: Looking up \"%s\".", hostTarget));
snprintf(fqdn, sizeof(fqdn), "%d", ntohs(port));
if ((addrlist = httpAddrGetList(hostTarget, AF_UNSPEC, fqdn)) != NULL)
{
for (addr = addrlist; addr; addr = addr->next)
{
int error = getnameinfo(&(addr->addr.addr), (socklen_t)httpAddrLength(&(addr->addr)), fqdn, sizeof(fqdn), NULL, 0, NI_NAMEREQD);
if (!error)
{
DEBUG_printf(("5http_resolve_cb: Found \"%s\".", fqdn));
if ((hostptr = fqdn + strlen(fqdn) - 6) <= fqdn ||
_cups_strcasecmp(hostptr, ".local"))
{
hostTarget = fqdn;
break;
}
}
#ifdef DEBUG
else
DEBUG_printf(("5http_resolve_cb: \"%s\" did not resolve: %d",
httpAddrString(&(addr->addr), fqdn, sizeof(fqdn)),
error));
#endif /* DEBUG */
}
httpAddrFreeList(addrlist);
}
}
/*
* Assemble the final device URI...
*/
if ((!strcmp(scheme, "ipp") || !strcmp(scheme, "ipps")) &&
!strcmp(uribuf->resource, "/cups"))
httpAssembleURIf(HTTP_URI_CODING_ALL, uribuf->buffer, (int)uribuf->bufsize, scheme, NULL, hostTarget, ntohs(port), "%s?snmp=false", resource);
else
httpAssembleURI(HTTP_URI_CODING_ALL, uribuf->buffer, (int)uribuf->bufsize, scheme, NULL, hostTarget, ntohs(port), resource);
DEBUG_printf(("5http_resolve_cb: Resolved URI is \"%s\"...", uribuf->buffer));
}
#elif defined(HAVE_AVAHI)
/*
* 'http_poll_cb()' - Wait for input on the specified file descriptors.
*
* Note: This function is needed because avahi_simple_poll_iterate is broken
* and always uses a timeout of 0 (!) milliseconds.
* (Avahi Ticket #364)
*
* @private@
*/
static int /* O - Number of file descriptors matching */
http_poll_cb(
struct pollfd *pollfds, /* I - File descriptors */
unsigned int num_pollfds, /* I - Number of file descriptors */
int timeout, /* I - Timeout in milliseconds (used) */
void *context) /* I - User data (unused) */
{
(void)timeout;
(void)context;
return (poll(pollfds, num_pollfds, 2000));
}
/*
* 'http_resolve_cb()' - Build a device URI for the given service name.
*/
static void
http_resolve_cb(
AvahiServiceResolver *resolver, /* I - Resolver (unused) */
AvahiIfIndex interface, /* I - Interface index (unused) */
AvahiProtocol protocol, /* I - Network protocol (unused) */
AvahiResolverEvent event, /* I - Event (found, etc.) */
const char *name, /* I - Service name */
const char *type, /* I - Registration type */
const char *domain, /* I - Domain (unused) */
const char *hostTarget, /* I - Hostname */
const AvahiAddress *address, /* I - Address (unused) */
uint16_t port, /* I - Port number */
AvahiStringList *txt, /* I - TXT record */
AvahiLookupResultFlags flags, /* I - Lookup flags (unused) */
void *context) /* I - Pointer to URI buffer */
{
_http_uribuf_t *uribuf = (_http_uribuf_t *)context;
/* URI buffer */
const char *scheme, /* URI scheme */
*hostptr, /* Pointer into hostTarget */
*reskey, /* "rp" or "rfo" */
*resdefault; /* Default path */
char resource[257], /* Remote path */
fqdn[256]; /* FQDN of the .local name */
AvahiStringList *pair; /* Current TXT record key/value pair */
char *value; /* Value for "rp" key */
size_t valueLen = 0; /* Length of "rp" key */
DEBUG_printf(("4http_resolve_cb(resolver=%p, "
"interface=%d, protocol=%d, event=%d, name=\"%s\", "
"type=\"%s\", domain=\"%s\", hostTarget=\"%s\", address=%p, "
"port=%d, txt=%p, flags=%d, context=%p)",
resolver, interface, protocol, event, name, type, domain,
hostTarget, address, port, txt, flags, context));
if (event != AVAHI_RESOLVER_FOUND)
{
avahi_service_resolver_free(resolver);
avahi_simple_poll_quit(uribuf->poll);
return;
}
/*
* If we have a UUID, compare it...
*/
if (uribuf->uuid && (pair = avahi_string_list_find(txt, "UUID")) != NULL)
{
char uuid[256]; /* UUID value */
avahi_string_list_get_pair(pair, NULL, &value, &valueLen);
memcpy(uuid, value, valueLen);
uuid[valueLen] = '\0';
if (_cups_strcasecmp(uuid, uribuf->uuid))
{
if (uribuf->options & _HTTP_RESOLVE_STDERR)
fprintf(stderr, "DEBUG: Found UUID %s, looking for %s.", uuid,
uribuf->uuid);
DEBUG_printf(("5http_resolve_cb: Found UUID %s, looking for %s.", uuid,
uribuf->uuid));
return;
}
}
/*
* Figure out the scheme from the full name...
*/
if (strstr(type, "_ipp."))
scheme = "ipp";
else if (strstr(type, "_printer."))
scheme = "lpd";
else if (strstr(type, "_pdl-datastream."))
scheme = "socket";
else
scheme = "riousbprint";
if (!strncmp(type, "_ipps.", 6) || !strncmp(type, "_ipp-tls.", 9))
scheme = "ipps";
else if (!strncmp(type, "_ipp.", 5) || !strncmp(type, "_fax-ipp.", 9))
scheme = "ipp";
else if (!strncmp(type, "_http.", 6))
scheme = "http";
else if (!strncmp(type, "_https.", 7))
scheme = "https";
else if (!strncmp(type, "_printer.", 9))
scheme = "lpd";
else if (!strncmp(type, "_pdl-datastream.", 16))
scheme = "socket";
else
{
avahi_service_resolver_free(resolver);
avahi_simple_poll_quit(uribuf->poll);
return;
}
/*
* Extract the remote resource key from the TXT record...
*/
if ((uribuf->options & _HTTP_RESOLVE_FAXOUT) &&
(!strcmp(scheme, "ipp") || !strcmp(scheme, "ipps")) &&
!avahi_string_list_find(txt, "printer-type"))
{
reskey = "rfo";
resdefault = "/ipp/faxout";
}
else
{
reskey = "rp";
resdefault = "/";
}
if ((pair = avahi_string_list_find(txt, reskey)) != NULL)
{
avahi_string_list_get_pair(pair, NULL, &value, &valueLen);
if (value[0] == '/')
{
/*
* Value (incorrectly) has a leading slash already...
*/
memcpy(resource, value, valueLen);
resource[valueLen] = '\0';
}
else
{
/*
* Convert to resource by concatenating with a leading "/"...
*/
resource[0] = '/';
memcpy(resource + 1, value, valueLen);
resource[valueLen + 1] = '\0';
}
}
else
{
/*
* Use the default value...
*/
strlcpy(resource, resdefault, sizeof(resource));
}
/*
* Lookup the FQDN if needed...
*/
if ((uribuf->options & _HTTP_RESOLVE_FQDN) &&
(hostptr = hostTarget + strlen(hostTarget) - 6) > hostTarget &&
!_cups_strcasecmp(hostptr, ".local"))
{
/*
* OK, we got a .local name but the caller needs a real domain. Start by
* getting the IP address of the .local name and then do reverse-lookups...
*/
http_addrlist_t *addrlist, /* List of addresses */
*addr; /* Current address */
DEBUG_printf(("5http_resolve_cb: Looking up \"%s\".", hostTarget));
snprintf(fqdn, sizeof(fqdn), "%d", ntohs(port));
if ((addrlist = httpAddrGetList(hostTarget, AF_UNSPEC, fqdn)) != NULL)
{
for (addr = addrlist; addr; addr = addr->next)
{
int error = getnameinfo(&(addr->addr.addr), (socklen_t)httpAddrLength(&(addr->addr)), fqdn, sizeof(fqdn), NULL, 0, NI_NAMEREQD);
if (!error)
{
DEBUG_printf(("5http_resolve_cb: Found \"%s\".", fqdn));
if ((hostptr = fqdn + strlen(fqdn) - 6) <= fqdn ||
_cups_strcasecmp(hostptr, ".local"))
{
hostTarget = fqdn;
break;
}
}
#ifdef DEBUG
else
DEBUG_printf(("5http_resolve_cb: \"%s\" did not resolve: %d",
httpAddrString(&(addr->addr), fqdn, sizeof(fqdn)),
error));
#endif /* DEBUG */
}
httpAddrFreeList(addrlist);
}
}
/*
* Assemble the final device URI using the resolved hostname...
*/
httpAssembleURI(HTTP_URI_CODING_ALL, uribuf->buffer, (int)uribuf->bufsize, scheme,
NULL, hostTarget, port, resource);
DEBUG_printf(("5http_resolve_cb: Resolved URI is \"%s\".", uribuf->buffer));
avahi_simple_poll_quit(uribuf->poll);
}
#endif /* HAVE_DNSSD */