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cups/cgi-bin/var.c

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Import Upstream version 2.3.1
2022-05-13 20:08:20 +08:00
/*
* CGI form variable and array functions for CUPS.
*
* Copyright © 2007-2019 by Apple Inc.
* Copyright © 1997-2005 by Easy Software Products.
*
* Licensed under Apache License v2.0. See the file "LICENSE" for more
* information.
*/
/*
* Include necessary headers...
*/
/*#define DEBUG*/
#include "cgi-private.h"
#include <cups/http.h>
/*
* Session ID name
*/
#define CUPS_SID "org.cups.sid"
/*
* Data structure to hold all the CGI form variables and arrays...
*/
typedef struct /**** Form variable structure ****/
{
char *name; /* Name of variable */
int nvalues, /* Number of values */
avalues; /* Number of values allocated */
char **values; /* Value(s) of variable */
} _cgi_var_t;
/*
* Local globals...
*/
static int num_cookies = 0;/* Number of cookies */
static cups_option_t *cookies = NULL;/* Cookies */
static int form_count = 0, /* Form variable count */
form_alloc = 0; /* Number of variables allocated */
static _cgi_var_t *form_vars = NULL;
/* Form variables */
static cgi_file_t *form_file = NULL;
/* Uploaded file */
/*
* Local functions...
*/
static void cgi_add_variable(const char *name, int element,
const char *value);
static int cgi_compare_variables(const _cgi_var_t *v1,
const _cgi_var_t *v2);
static _cgi_var_t *cgi_find_variable(const char *name);
static void cgi_initialize_cookies(void);
static int cgi_initialize_get(void);
static int cgi_initialize_multipart(const char *boundary);
static int cgi_initialize_post(void);
static int cgi_initialize_string(const char *data);
static const char *cgi_passwd(const char *prompt);
static const char *cgi_set_sid(void);
static void cgi_sort_variables(void);
static void cgi_unlink_file(void);
/*
* 'cgiCheckVariables()' - Check for the presence of "required" variables.
*
* Names may be separated by spaces and/or commas.
*/
int /* O - 1 if all variables present, 0 otherwise */
cgiCheckVariables(const char *names) /* I - Variables to look for */
{
char name[255], /* Current variable name */
*s; /* Pointer in string */
const char *val; /* Value of variable */
int element; /* Array element number */
if (names == NULL)
return (1);
while (*names != '\0')
{
while (*names == ' ' || *names == ',')
names ++;
for (s = name; *names != '\0' && *names != ' ' && *names != ','; s ++, names ++)
*s = *names;
*s = 0;
if (name[0] == '\0')
break;
if ((s = strrchr(name, '-')) != NULL)
{
*s = '\0';
element = atoi(s + 1) - 1;
val = cgiGetArray(name, element);
}
else
val = cgiGetVariable(name);
if (val == NULL)
return (0);
if (*val == '\0')
{
free((void *)val);
return (0); /* Can't be blank, either! */
}
free((void *)val);
}
return (1);
}
/*
* 'cgiClearVariables()' - Clear all form variables.
*/
void
cgiClearVariables(void)
{
int i, j; /* Looping vars */
_cgi_var_t *v; /* Current variable */
fputs("DEBUG: cgiClearVariables called.\n", stderr);
for (v = form_vars, i = form_count; i > 0; v ++, i --)
{
free(v->name);
for (j = 0; j < v->nvalues; j ++)
if (v->values[j])
free(v->values[j]);
}
form_count = 0;
cgi_unlink_file();
}
/*
* 'cgiGetArray()' - Get an element from a form array.
*/
char * /* O - Element value or NULL */
cgiGetArray(const char *name, /* I - Name of array variable */
int element) /* I - Element number (0 to N) */
{
_cgi_var_t *var; /* Pointer to variable */
if ((var = cgi_find_variable(name)) == NULL)
return (NULL);
if (element < 0 || element >= var->nvalues)
return (NULL);
if (var->values[element] == NULL)
return (NULL);
return (strdup(var->values[element]));
}
/*
* 'cgiGetCookie()' - Get a cookie value.
*/
const char * /* O - Value or NULL */
cgiGetCookie(const char *name) /* I - Name of cookie */
{
return (cupsGetOption(name, num_cookies, cookies));
}
/*
* 'cgiGetFile()' - Get the file (if any) that was submitted in the form.
*/
const cgi_file_t * /* O - Attached file or NULL */
cgiGetFile(void)
{
return (form_file);
}
/*
* 'cgiGetSize()' - Get the size of a form array value.
*/
int /* O - Number of elements */
cgiGetSize(const char *name) /* I - Name of variable */
{
_cgi_var_t *var; /* Pointer to variable */
if ((var = cgi_find_variable(name)) == NULL)
return (0);
return (var->nvalues);
}
/*
* 'cgiGetVariable()' - Get a CGI variable from the database.
*
* Returns NULL if the variable doesn't exist. If the variable is an
* array of values, returns the last element.
*/
char * /* O - Value of variable */
cgiGetVariable(const char *name) /* I - Name of variable */
{
const _cgi_var_t *var; /* Returned variable */
var = cgi_find_variable(name);
return ((var == NULL) ? NULL : strdup(var->values[var->nvalues - 1]));
}
/*
* 'cgiInitialize()' - Initialize the CGI variable "database".
*/
int /* O - Non-zero if there was form data */
cgiInitialize(void)
{
const char *method, /* Form posting method */
*content_type, /* Content-Type of post data */
*cups_sid_cookie, /* SID cookie */
*cups_sid_form; /* SID form variable */
/*
* Setup a password callback for authentication...
*/
cupsSetPasswordCB(cgi_passwd);
/*
* Set the locale so that times, etc. are formatted properly...
*/
setlocale(LC_ALL, "");
#ifdef DEBUG
/*
* Disable output buffering to find bugs...
*/
setbuf(stdout, NULL);
#endif /* DEBUG */
/*
* Get cookies...
*/
cgi_initialize_cookies();
if ((cups_sid_cookie = cgiGetCookie(CUPS_SID)) == NULL)
{
fputs("DEBUG: " CUPS_SID " cookie not found, initializing!\n", stderr);
cups_sid_cookie = cgi_set_sid();
}
fprintf(stderr, "DEBUG: " CUPS_SID " cookie is \"%s\"\n", cups_sid_cookie);
/*
* Get the request method (GET or POST)...
*/
method = getenv("REQUEST_METHOD");
content_type = getenv("CONTENT_TYPE");
if (!method)
return (0);
/*
* Grab form data from the corresponding location...
*/
if (!_cups_strcasecmp(method, "GET"))
return (cgi_initialize_get());
else if (!_cups_strcasecmp(method, "POST") && content_type)
{
const char *boundary = strstr(content_type, "boundary=");
if (boundary)
boundary += 9;
if (content_type && !strncmp(content_type, "multipart/form-data; ", 21))
{
if (!cgi_initialize_multipart(boundary))
return (0);
}
else if (!cgi_initialize_post())
return (0);
if ((cups_sid_form = cgiGetVariable(CUPS_SID)) == NULL ||
strcmp(cups_sid_cookie, cups_sid_form))
{
if (cups_sid_form)
fprintf(stderr, "DEBUG: " CUPS_SID " form variable is \"%s\"\n",
cups_sid_form);
else
fputs("DEBUG: " CUPS_SID " form variable is not present.\n", stderr);
free((void *)cups_sid_form);
cgiClearVariables();
return (0);
}
else
{
free((void *)cups_sid_form);
return (1);
}
}
else
return (0);
}
/*
* 'cgiIsPOST()' - Determine whether this page was POSTed.
*/
int /* O - 1 if POST, 0 if GET */
cgiIsPOST(void)
{
const char *method; /* REQUEST_METHOD environment variable */
if ((method = getenv("REQUEST_METHOD")) == NULL)
return (0);
else
return (!strcmp(method, "POST"));
}
/*
* 'cgiSetArray()' - Set array element N to the specified string.
*
* If the variable array is smaller than (element + 1), the intervening
* elements are set to NULL.
*/
void
cgiSetArray(const char *name, /* I - Name of variable */
int element, /* I - Element number (0 to N) */
const char *value) /* I - Value of variable */
{
int i; /* Looping var */
_cgi_var_t *var; /* Returned variable */
if (name == NULL || value == NULL || element < 0 || element > 100000)
return;
fprintf(stderr, "DEBUG: cgiSetArray: %s[%d]=\"%s\"\n", name, element, value);
if ((var = cgi_find_variable(name)) == NULL)
{
cgi_add_variable(name, element, value);
cgi_sort_variables();
}
else
{
if (element >= var->avalues)
{
char **temp; /* Temporary pointer */
temp = (char **)realloc((void *)(var->values), sizeof(char *) * (size_t)(element + 16));
if (!temp)
return;
var->avalues = element + 16;
var->values = temp;
}
if (element >= var->nvalues)
{
for (i = var->nvalues; i < element; i ++)
var->values[i] = NULL;
var->nvalues = element + 1;
}
else if (var->values[element])
free((char *)var->values[element]);
var->values[element] = strdup(value);
}
}
/*
* 'cgiSetCookie()' - Set a cookie value.
*/
void
cgiSetCookie(const char *name, /* I - Name */
const char *value, /* I - Value */
const char *path, /* I - Path (typically "/") */
const char *domain, /* I - Domain name */
time_t expires, /* I - Expiration date (0 for session) */
int secure) /* I - Require SSL */
{
num_cookies = cupsAddOption(name, value, num_cookies, &cookies);
printf("Set-Cookie: %s=%s;", name, value);
if (path)
printf(" path=%s;", path);
if (domain)
printf(" domain=%s;", domain);
if (expires)
{
char date[256]; /* Date string */
printf(" expires=%s;", httpGetDateString2(expires, date, sizeof(date)));
}
if (secure)
puts(" httponly; secure;");
else
puts(" httponly;");
}
/*
* 'cgiSetSize()' - Set the array size.
*/
void
cgiSetSize(const char *name, /* I - Name of variable */
int size) /* I - Number of elements (0 to N) */
{
int i; /* Looping var */
_cgi_var_t *var; /* Returned variable */
if (name == NULL || size < 0 || size > 100000)
return;
if ((var = cgi_find_variable(name)) == NULL)
return;
if (size >= var->avalues)
{
char **temp; /* Temporary pointer */
temp = (char **)realloc((void *)(var->values), sizeof(char *) * (size_t)(size + 16));
if (!temp)
return;
var->avalues = size + 16;
var->values = temp;
}
if (size > var->nvalues)
{
for (i = var->nvalues; i < size; i ++)
var->values[i] = NULL;
}
else if (size < var->nvalues)
{
for (i = size; i < var->nvalues; i ++)
if (var->values[i])
free((void *)(var->values[i]));
}
var->nvalues = size;
}
/*
* 'cgiSetVariable()' - Set a CGI variable in the database.
*
* If the variable is an array, this truncates the array to a single element.
*/
void
cgiSetVariable(const char *name, /* I - Name of variable */
const char *value) /* I - Value of variable */
{
int i; /* Looping var */
_cgi_var_t *var; /* Returned variable */
if (name == NULL || value == NULL)
return;
fprintf(stderr, "cgiSetVariable: %s=\"%s\"\n", name, value);
if ((var = cgi_find_variable(name)) == NULL)
{
cgi_add_variable(name, 0, value);
cgi_sort_variables();
}
else
{
for (i = 0; i < var->nvalues; i ++)
if (var->values[i])
free((char *)var->values[i]);
var->values[0] = strdup(value);
var->nvalues = 1;
}
}
/*
* 'cgi_add_variable()' - Add a form variable.
*/
static void
cgi_add_variable(const char *name, /* I - Variable name */
int element, /* I - Array element number */
const char *value) /* I - Variable value */
{
_cgi_var_t *var; /* New variable */
if (name == NULL || value == NULL || element < 0 || element > 100000)
return;
if (form_count >= form_alloc)
{
_cgi_var_t *temp_vars; /* Temporary form pointer */
if (form_alloc == 0)
temp_vars = malloc(sizeof(_cgi_var_t) * 16);
else
temp_vars = realloc(form_vars, (size_t)(form_alloc + 16) * sizeof(_cgi_var_t));
if (!temp_vars)
return;
form_vars = temp_vars;
form_alloc += 16;
}
var = form_vars + form_count;
if ((var->values = calloc((size_t)element + 1, sizeof(char *))) == NULL)
return;
var->name = strdup(name);
var->nvalues = element + 1;
var->avalues = element + 1;
var->values[element] = strdup(value);
form_count ++;
}
/*
* 'cgi_compare_variables()' - Compare two variables.
*/
static int /* O - Result of comparison */
cgi_compare_variables(
const _cgi_var_t *v1, /* I - First variable */
const _cgi_var_t *v2) /* I - Second variable */
{
return (_cups_strcasecmp(v1->name, v2->name));
}
/*
* 'cgi_find_variable()' - Find a variable.
*/
static _cgi_var_t * /* O - Variable pointer or NULL */
cgi_find_variable(const char *name) /* I - Name of variable */
{
_cgi_var_t key; /* Search key */
if (form_count < 1 || name == NULL)
return (NULL);
key.name = (char *)name;
return ((_cgi_var_t *)bsearch(&key, form_vars, (size_t)form_count, sizeof(_cgi_var_t),
(int (*)(const void *, const void *))cgi_compare_variables));
}
/*
* 'cgi_initialize_cookies()' - Initialize cookies.
*/
static void
cgi_initialize_cookies(void)
{
const char *cookie; /* HTTP_COOKIE environment variable */
char name[128], /* Name string */
value[512], /* Value string */
*ptr; /* Pointer into name/value */
if ((cookie = getenv("HTTP_COOKIE")) == NULL)
return;
while (*cookie)
{
int skip = 0; /* Skip this cookie? */
/*
* Skip leading whitespace...
*/
while (isspace(*cookie & 255))
cookie ++;
if (!*cookie)
break;
/*
* Copy the name...
*/
for (ptr = name; *cookie && *cookie != '=';)
if (ptr < (name + sizeof(name) - 1))
{
*ptr++ = *cookie++;
}
else
{
skip = 1;
cookie ++;
}
if (*cookie != '=')
break;
*ptr = '\0';
cookie ++;
/*
* Then the value...
*/
if (*cookie == '\"')
{
for (cookie ++, ptr = value; *cookie && *cookie != '\"';)
if (ptr < (value + sizeof(value) - 1))
{
*ptr++ = *cookie++;
}
else
{
skip = 1;
cookie ++;
}
if (*cookie == '\"')
cookie ++;
else
skip = 1;
}
else
{
for (ptr = value; *cookie && *cookie != ';';)
if (ptr < (value + sizeof(value) - 1))
{
*ptr++ = *cookie++;
}
else
{
skip = 1;
cookie ++;
}
}
if (*cookie == ';')
cookie ++;
else if (*cookie)
skip = 1;
*ptr = '\0';
/*
* Then add the cookie to an array as long as the name doesn't start with
* "$"...
*/
if (name[0] != '$' && !skip)
num_cookies = cupsAddOption(name, value, num_cookies, &cookies);
}
}
/*
* 'cgi_initialize_get()' - Initialize form variables using the GET method.
*/
static int /* O - 1 if form data read */
cgi_initialize_get(void)
{
char *data; /* Pointer to form data string */
/*
* Check to see if there is anything for us to read...
*/
data = getenv("QUERY_STRING");
if (data == NULL || strlen(data) == 0)
return (0);
/*
* Parse it out and return...
*/
return (cgi_initialize_string(data));
}
/*
* 'cgi_initialize_multipart()' - Initialize variables and file using the POST
* method.
*
* TODO: Update to support files > 2GB.
*/
static int /* O - 1 if form data was read */
cgi_initialize_multipart(
const char *boundary) /* I - Boundary string */
{
char line[10240], /* MIME header line */
name[1024], /* Form variable name */
filename[1024], /* Form filename */
mimetype[1024], /* MIME media type */
bstring[256], /* Boundary string to look for */
*ptr, /* Pointer into name/filename */
*end; /* End of buffer */
int ch, /* Character from file */
fd; /* Temporary file descriptor */
size_t blen; /* Length of boundary string */
/*
* Read multipart form data until we run out...
*/
name[0] = '\0';
filename[0] = '\0';
mimetype[0] = '\0';
snprintf(bstring, sizeof(bstring), "\r\n--%s", boundary);
blen = strlen(bstring);
while (fgets(line, sizeof(line), stdin))
{
if (!strcmp(line, "\r\n"))
{
/*
* End of headers, grab value...
*/
if (filename[0])
{
/*
* Read an embedded file...
*/
if (form_file)
{
/*
* Remove previous file...
*/
cgi_unlink_file();
}
/*
* Allocate memory for the new file...
*/
if ((form_file = calloc(1, sizeof(cgi_file_t))) == NULL)
return (0);
form_file->name = strdup(name);
form_file->filename = strdup(filename);
form_file->mimetype = strdup(mimetype);
fd = cupsTempFd(form_file->tempfile, sizeof(form_file->tempfile));
if (fd < 0)
return (0);
atexit(cgi_unlink_file);
/*
* Copy file data to the temp file...
*/
ptr = line;
while ((ch = getchar()) != EOF)
{
*ptr++ = (char)ch;
if ((size_t)(ptr - line) >= blen && !memcmp(ptr - blen, bstring, blen))
{
ptr -= blen;
break;
}
if ((ptr - line - (int)blen) >= 8192)
{
/*
* Write out the first 8k of the buffer...
*/
write(fd, line, 8192);
memmove(line, line + 8192, (size_t)(ptr - line - 8192));
ptr -= 8192;
}
}
/*
* Write the rest of the data and close the temp file...
*/
if (ptr > line)
write(fd, line, (size_t)(ptr - line));
close(fd);
}
else
{
/*
* Just get a form variable; the current code only handles
* form values up to 10k in size...
*/
ptr = line;
end = line + sizeof(line) - 1;
while ((ch = getchar()) != EOF)
{
if (ptr < end)
*ptr++ = (char)ch;
if ((size_t)(ptr - line) >= blen && !memcmp(ptr - blen, bstring, blen))
{
ptr -= blen;
break;
}
}
*ptr = '\0';
/*
* Set the form variable...
*/
if ((ptr = strrchr(name, '-')) != NULL && isdigit(ptr[1] & 255))
{
/*
* Set a specific index in the array...
*/
*ptr++ = '\0';
if (line[0])
cgiSetArray(name, atoi(ptr) - 1, line);
}
else if ((ptr = cgiGetVariable(name)) != NULL)
{
/*
* Add another element in the array...
*/
free(ptr);
cgiSetArray(name, cgiGetSize(name), line);
}
else
{
/*
* Just set the line...
*/
cgiSetVariable(name, line);
}
}
/*
* Read the rest of the current line...
*/
fgets(line, sizeof(line), stdin);
/*
* Clear the state vars...
*/
name[0] = '\0';
filename[0] = '\0';
mimetype[0] = '\0';
}
else if (!_cups_strncasecmp(line, "Content-Disposition:", 20))
{
if ((ptr = strstr(line + 20, " name=\"")) != NULL)
{
strlcpy(name, ptr + 7, sizeof(name));
if ((ptr = strchr(name, '\"')) != NULL)
*ptr = '\0';
}
if ((ptr = strstr(line + 20, " filename=\"")) != NULL)
{
strlcpy(filename, ptr + 11, sizeof(filename));
if ((ptr = strchr(filename, '\"')) != NULL)
*ptr = '\0';
}
}
else if (!_cups_strncasecmp(line, "Content-Type:", 13))
{
for (ptr = line + 13; isspace(*ptr & 255); ptr ++);
strlcpy(mimetype, ptr, sizeof(mimetype));
for (ptr = mimetype + strlen(mimetype) - 1;
ptr > mimetype && isspace(*ptr & 255);
*ptr-- = '\0');
}
}
/*
* Return 1 for "form data found"...
*/
return (1);
}
/*
* 'cgi_initialize_post()' - Initialize variables using the POST method.
*/
static int /* O - 1 if form data was read */
cgi_initialize_post(void)
{
char *content_length, /* Length of input data (string) */
*data; /* Pointer to form data string */
size_t length, /* Length of input data */
tbytes; /* Total number of bytes read */
ssize_t nbytes; /* Number of bytes read this read() */
int status; /* Return status */
/*
* Check to see if there is anything for us to read...
*/
content_length = getenv("CONTENT_LENGTH");
if (content_length == NULL || atoi(content_length) <= 0)
return (0);
/*
* Get the length of the input stream and allocate a buffer for it...
*/
length = (size_t)strtol(content_length, NULL, 10);
data = malloc(length + 1); // lgtm [cpp/uncontrolled-allocation-size]
if (data == NULL)
return (0);
/*
* Read the data into the buffer...
*/
for (tbytes = 0; tbytes < length; tbytes += (size_t)nbytes)
if ((nbytes = read(0, data + tbytes, (size_t)(length - tbytes))) < 0)
{
if (errno != EAGAIN)
{
free(data);
return (0);
}
else
nbytes = 0;
}
else if (nbytes == 0)
{
/*
* CUPS STR #3176: OpenBSD: Early end-of-file on POST data causes 100% CPU
*
* This should never happen, but does on OpenBSD. If we see early end-of-
* file, treat this as an error and process no data.
*/
free(data);
return (0);
}
data[length] = '\0';
/*
* Parse it out...
*/
status = cgi_initialize_string(data);
/*
* Free the data and return...
*/
free(data);
return (status);
}
/*
* 'cgi_initialize_string()' - Initialize form variables from a string.
*/
static int /* O - 1 if form data was processed */
cgi_initialize_string(const char *data) /* I - Form data string */
{
int done; /* True if we're done reading a form variable */
char *s, /* Pointer to current form string */
ch, /* Temporary character */
name[255], /* Name of form variable */
value[65536], /* Variable value */
*temp; /* Temporary pointer */
/*
* Check input...
*/
if (data == NULL)
return (0);
/*
* Loop until we've read all the form data...
*/
while (*data != '\0')
{
/*
* Get the variable name...
*/
for (s = name; *data != '\0'; data ++)
if (*data == '=')
break;
else if (*data >= ' ' && s < (name + sizeof(name) - 1))
*s++ = *data;
*s = '\0';
if (*data == '=')
data ++;
else
return (0);
/*
* Read the variable value...
*/
for (s = value, done = 0; !done && *data != '\0'; data ++)
switch (*data)
{
case '&' : /* End of data... */
done = 1;
break;
case '+' : /* Escaped space character */
if (s < (value + sizeof(value) - 1))
*s++ = ' ';
break;
case '%' : /* Escaped control character */
/*
* Read the hex code...
*/
if (!isxdigit(data[1] & 255) || !isxdigit(data[2] & 255))
return (0);
if (s < (value + sizeof(value) - 1))
{
data ++;
ch = *data - '0';
if (ch > 9)
ch -= 7;
*s = (char)(ch << 4);
data ++;
ch = *data - '0';
if (ch > 9)
ch -= 7;
*s++ |= ch;
}
else
data += 2;
break;
default : /* Other characters come straight through */
if (*data >= ' ' && s < (value + sizeof(value) - 1))
*s++ = *data;
break;
}
*s = '\0'; /* nul terminate the string */
/*
* Remove trailing whitespace...
*/
if (s > value)
s --;
while (s >= value && isspace(*s & 255))
*s-- = '\0';
/*
* Add the string to the variable "database"...
*/
if ((s = strrchr(name, '-')) != NULL && isdigit(s[1] & 255))
{
*s++ = '\0';
if (value[0])
cgiSetArray(name, atoi(s) - 1, value);
}
else if ((temp = cgiGetVariable(name)) != NULL)
{
free(temp);
cgiSetArray(name, cgiGetSize(name), value);
}
else
cgiSetVariable(name, value);
}
return (1);
}
/*
* 'cgi_passwd()' - Catch authentication requests and notify the server.
*
* This function sends a Status header and exits, forcing authentication
* for this request.
*/
static const char * /* O - NULL (no return) */
cgi_passwd(const char *prompt) /* I - Prompt (not used) */
{
(void)prompt;
fprintf(stderr, "DEBUG: cgi_passwd(prompt=\"%s\") called!\n",
prompt ? prompt : "(null)");
/*
* Send a 401 (unauthorized) status to the server, so it can notify
* the client that authentication is required.
*/
puts("Status: 401\n");
exit(0);
/*
* This code is never executed, but is present to satisfy the compiler.
*/
return (NULL);
}
/*
* 'cgi_set_sid()' - Set the CUPS session ID.
*/
static const char * /* O - New session ID */
cgi_set_sid(void)
{
char buffer[512], /* SID data */
sid[33]; /* SID string */
unsigned char sum[16]; /* MD5 sum */
const char *remote_addr, /* REMOTE_ADDR */
*server_name, /* SERVER_NAME */
*server_port; /* SERVER_PORT */
struct timeval curtime; /* Current time */
if ((remote_addr = getenv("REMOTE_ADDR")) == NULL)
remote_addr = "REMOTE_ADDR";
if ((server_name = getenv("SERVER_NAME")) == NULL)
server_name = "SERVER_NAME";
if ((server_port = getenv("SERVER_PORT")) == NULL)
server_port = "SERVER_PORT";
gettimeofday(&curtime, NULL);
CUPS_SRAND(curtime.tv_sec + curtime.tv_usec);
snprintf(buffer, sizeof(buffer), "%s:%s:%s:%02X%02X%02X%02X%02X%02X%02X%02X",
remote_addr, server_name, server_port,
(unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255,
(unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255,
(unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255,
(unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255);
cupsHashData("md5", (unsigned char *)buffer, strlen(buffer), sum, sizeof(sum));
cgiSetCookie(CUPS_SID, cupsHashString(sum, sizeof(sum), sid, sizeof(sid)), "/", NULL, 0, 0);
return (cupsGetOption(CUPS_SID, num_cookies, cookies));
}
/*
* 'cgi_sort_variables()' - Sort all form variables for faster lookup.
*/
static void
cgi_sort_variables(void)
{
if (form_count < 2)
return;
qsort(form_vars, (size_t)form_count, sizeof(_cgi_var_t),
(int (*)(const void *, const void *))cgi_compare_variables);
}
/*
* 'cgi_unlink_file()' - Remove the uploaded form.
*/
static void
cgi_unlink_file(void)
{
if (form_file)
{
/*
* Remove the temporary file...
*/
unlink(form_file->tempfile);
/*
* Free memory used...
*/
free(form_file->name);
free(form_file->filename);
free(form_file->mimetype);
free(form_file);
form_file = NULL;
}
}