/*
* $Id: avpair.c,v 1.1 2004/11/14 07:26:26 paulus Exp $
*
* Copyright (C) 1995 Lars Fenneberg
*
* Copyright 1992 Livingston Enterprises, Inc.
*
* Copyright 1992,1993, 1994,1995 The Regents of the University of Michigan
* and Merit Network, Inc. All Rights Reserved
*
* See the file COPYRIGHT for the respective terms and conditions.
* If the file is missing contact me at lf@elemental.net
* and I'll send you a copy.
*
*/
#include <includes.h>
#include <radiusclient.h>
static void rc_extract_vendor_specific_attributes(int attrlen,
unsigned char *ptr,
VALUE_PAIR **vp);
/*
* Function: rc_avpair_add
*
* Purpose: add an attribute-value pair to the given list.
*
* Returns: pointer to added a/v pair upon success, NULL pointer upon failure.
*
* Remarks: Always appends the new pair to the end of the list.
*
*/
VALUE_PAIR *rc_avpair_add (VALUE_PAIR **list, int attrid, void *pval, int len,
int vendorcode)
{
VALUE_PAIR *vp;
vp = rc_avpair_new (attrid, pval, len, vendorcode);
if (vp != (VALUE_PAIR *) NULL)
{
rc_avpair_insert (list, (VALUE_PAIR *) NULL, vp);
}
return vp;
}
/*
* Function: rc_avpair_assign
*
* Purpose: assign the given value to an attribute-value pair.
*
* Returns: 0 on success,
* -1 on failure.
*
*/
int rc_avpair_assign (VALUE_PAIR *vp, void *pval, int len)
{
int result = -1;
switch (vp->type)
{
case PW_TYPE_STRING:
if (((len == 0) && (strlen ((char *) pval)) > AUTH_STRING_LEN)
|| (len > AUTH_STRING_LEN)) {
error("rc_avpair_assign: bad attribute length");
return result;
}
if (len > 0) {
memcpy(vp->strvalue, (char *)pval, len);
vp->strvalue[len] = '\0';
vp->lvalue = len;
} else {
strncpy (vp->strvalue, (char *) pval, AUTH_STRING_LEN);
vp->lvalue = strlen((char *) pval);
}
result = 0;
break;
case PW_TYPE_DATE:
case PW_TYPE_INTEGER:
case PW_TYPE_IPADDR:
vp->lvalue = * (UINT4 *) pval;
result = 0;
break;
default:
error("rc_avpair_assign: unknown attribute %d", vp->type);
}
return result;
}
/*
* Function: rc_avpair_new
*
* Purpose: make a new attribute-value pair with given parameters.
*
* Returns: pointer to generated a/v pair when successful, NULL when failure.
*
*/
VALUE_PAIR *rc_avpair_new (int attrid, void *pval, int len, int vendorcode)
{
VALUE_PAIR *vp = (VALUE_PAIR *) NULL;
DICT_ATTR *pda;
if ((pda = rc_dict_getattr (attrid, vendorcode)) == (DICT_ATTR *) NULL)
{
error("rc_avpair_new: unknown attribute %d", attrid);
}
else
{
if ((vp = (VALUE_PAIR *) malloc (sizeof (VALUE_PAIR)))
!= (VALUE_PAIR *) NULL)
{
strncpy (vp->name, pda->name, sizeof (vp->name));
vp->attribute = attrid;
vp->vendorcode = vendorcode;
vp->next = (VALUE_PAIR *) NULL;
vp->type = pda->type;
if (rc_avpair_assign (vp, pval, len) == 0)
{
return vp;
}
free (vp);
vp = (VALUE_PAIR *) NULL;
}
else
novm("rc_avpair_new");
}
return vp;
}
/*
*
* Function: rc_avpair_gen
*
* Purpose: takes attribute/value pairs from buffer and builds a
* value_pair list using allocated memory.
*
* Returns: value_pair list or NULL on failure
*/
VALUE_PAIR *rc_avpair_gen (AUTH_HDR *auth)
{
int length;
int x_len;
int attribute;
int attrlen;
UINT4 lvalue;
unsigned char *x_ptr;
unsigned char *ptr;
DICT_ATTR *attr;
VALUE_PAIR *vp;
VALUE_PAIR *pair;
unsigned char hex[3]; /* For hex string conversion. */
char buffer[512];
/*
* Extract attribute-value pairs
*/
ptr = auth->data;
length = ntohs ((unsigned short) auth->length) - AUTH_HDR_LEN;
vp = (VALUE_PAIR *) NULL;
while (length > 0)
{
attribute = *ptr++;
attrlen = *ptr++;
attrlen -= 2;
if (attrlen < 0)
{
error("rc_avpair_gen: received attribute with invalid length");
break;
}
/* Handle vendor-specific specially */
if (attribute == PW_VENDOR_SPECIFIC) {
rc_extract_vendor_specific_attributes(attrlen, ptr, &vp);
ptr += attrlen;
length -= (attrlen + 2);
continue;
}
if ((attr = rc_dict_getattr (attribute, VENDOR_NONE)) == (DICT_ATTR *) NULL)
{
*buffer= '\0'; /* Initial length. */
for (x_ptr = ptr, x_len = attrlen ;
x_len > 0 ;
x_len--, x_ptr++)
{
sprintf (hex, "%2.2X", *x_ptr);
strcat (buffer, hex);
}
warn("rc_avpair_gen: received unknown attribute %d of length %d: 0x%s",
attribute, attrlen, buffer);
}
else
{
if ((pair =
(VALUE_PAIR *) malloc (sizeof (VALUE_PAIR))) ==
(VALUE_PAIR *) NULL)
{
novm("rc_avpair_gen");
rc_avpair_free(vp);
return NULL;
}
strcpy (pair->name, attr->name);
pair->attribute = attr->value;
pair->vendorcode = VENDOR_NONE;
pair->type = attr->type;
pair->next = (VALUE_PAIR *) NULL;
switch (attr->type)
{
case PW_TYPE_STRING:
memcpy (pair->strvalue, (char *) ptr, (size_t) attrlen);
pair->strvalue[attrlen] = '\0';
pair->lvalue = attrlen;
rc_avpair_insert (&vp, (VALUE_PAIR *) NULL, pair);
break;
case PW_TYPE_INTEGER:
case PW_TYPE_IPADDR:
memcpy ((char *) &lvalue, (char *) ptr,
sizeof (UINT4));
pair->lvalue = ntohl (lvalue);
rc_avpair_insert (&vp, (VALUE_PAIR *) NULL, pair);
break;
default:
warn("rc_avpair_gen: %s has unknown type", attr->name);
free (pair);
break;
}
}
ptr += attrlen;
length -= attrlen + 2;
}
return (vp);
}
/*
* Function: rc_extract_vendor_specific_attributes
*
* Purpose: Extracts vendor-specific attributes, assuming they are in
* the "SHOULD" format recommended by RCF 2138.
*
* Returns: found value_pair
*
*/
static void rc_extract_vendor_specific_attributes(int attrlen,
unsigned char *ptr,
VALUE_PAIR **vp)
{
int vendor_id;
int vtype;
int vlen;
UINT4 lvalue;
DICT_ATTR *attr;
VALUE_PAIR *pair;
/* ptr is sitting at vendor-ID */
if (attrlen < 8) {
/* Nothing to see here... */
return;
}
/* High-order octet of Vendor-Id must be zero (RFC2138) */
if (*ptr) {
return;
}
/* Extract vendor_id */
vendor_id = (int) (
((unsigned int) ptr[1]) * 256 * 256 +
((unsigned int) ptr[2]) * 256 +
((unsigned int) ptr[3]));
/* Bump ptr up to contents */
ptr += 4;
/* Set attrlen to length of data */
attrlen -= 4;
for (; attrlen; attrlen -= vlen+2, ptr += vlen) {
vtype = *ptr++;
vlen = *ptr++;
vlen -= 2;
if (vlen < 0 || vlen > attrlen - 2) {
/* Do not log an error. We are supposed to be able to cope with
arbitrary vendor-specific gunk */
return;
}
/* Looks plausible... */
if ((attr = rc_dict_getattr(vtype, vendor_id)) == NULL) {
continue;
}
/* TODO: Check that length matches data size!!!!! */
pair = (VALUE_PAIR *) malloc(sizeof(VALUE_PAIR));
if (!pair) {
novm("rc_avpair_gen");
return;
}
strcpy(pair->name, attr->name);
pair->attribute = attr->value;
pair->vendorcode = vendor_id;
pair->type = attr->type;
pair->next = NULL;
switch (attr->type) {
case PW_TYPE_STRING:
memcpy (pair->strvalue, (char *) ptr, (size_t) vlen);
pair->strvalue[vlen] = '\0';
pair->lvalue = vlen;
rc_avpair_insert (vp, (VALUE_PAIR *) NULL, pair);
break;
case PW_TYPE_INTEGER:
case PW_TYPE_IPADDR:
memcpy ((char *) &lvalue, (char *) ptr,
sizeof (UINT4));
pair->lvalue = ntohl (lvalue);
rc_avpair_insert (vp, (VALUE_PAIR *) NULL, pair);
break;
default:
warn("rc_avpair_gen: %s has unknown type", attr->name);
free (pair);
break;
}
}
}
/*
* Function: rc_avpair_get
*
* Purpose: Find the first attribute value-pair (which matches the given
* attribute) from the specified value-pair list.
*
* Returns: found value_pair
*
*/
VALUE_PAIR *rc_avpair_get (VALUE_PAIR *vp, UINT4 attr)
{
for (; vp != (VALUE_PAIR *) NULL && vp->attribute != attr; vp = vp->next)
{
continue;
}
return (vp);
}
/*
* Function: rc_avpair_copy
*
* Purpose: Return a copy of the existing list "p" ala strdup().
*
*/
VALUE_PAIR *rc_avpair_copy(VALUE_PAIR *p)
{
VALUE_PAIR *vp, *fp = NULL, *lp = NULL;
while (p) {
vp = malloc(sizeof(VALUE_PAIR));
if (!vp) {
novm("rc_avpair_copy");
return NULL; /* leaks a little but so what */
}
*vp = *p;
if (!fp)
fp = vp;
if (lp)
lp->next = vp;
lp = vp;
p = p->next;
}
return fp;
}
/*
* Function: rc_avpair_insert
*
* Purpose: Given the address of an existing list "a" and a pointer
* to an entry "p" in that list, add the list "b" to
* the "a" list after the "p" entry. If "p" is NULL, add
* the list "b" to the end of "a".
*
*/
void rc_avpair_insert (VALUE_PAIR **a, VALUE_PAIR *p, VALUE_PAIR *b)
{
VALUE_PAIR *this_node = NULL;
VALUE_PAIR *vp;
if (*a == (VALUE_PAIR *) NULL)
{
*a = b;
return;
}
if (!b)
return;
vp = *a;
if ( p == (VALUE_PAIR *) NULL) /* run to end of "a" list */
{
while (vp != (VALUE_PAIR *) NULL)
{
this_node = vp;
vp = vp->next;
}
}
else /* look for the "p" entry in the "a" list (or run to end) */
{
this_node = *a;
while (this_node != (VALUE_PAIR *) NULL)
{
if (this_node == p)
{
break;
}
this_node = this_node->next;
}
}
/* add "b" at this_node */
vp = this_node->next;
this_node->next = b;
/* run to end of "b" and connect the rest of "a" */
while (b->next)
b = b->next;
b->next = vp;
return;
}
/*
* Function: rc_avpair_free
*
* Purpose: frees all value_pairs in the list
*
*/
void rc_avpair_free (VALUE_PAIR *pair)
{
VALUE_PAIR *next;
while (pair != (VALUE_PAIR *) NULL)
{
next = pair->next;
free (pair);
pair = next;
}
}
/*
* Function: rc_fieldcpy
*
* Purpose: Copy a data field from the buffer. Advance the buffer
* past the data field.
*
*/
static void rc_fieldcpy (char *string, char **uptr)
{
char *ptr;
ptr = *uptr;
if (*ptr == '"')
{
ptr++;
while (*ptr != '"' && *ptr != '\0' && *ptr != '\n')
{
*string++ = *ptr++;
}
*string = '\0';
if (*ptr == '"')
{
ptr++;
}
*uptr = ptr;
return;
}
while (*ptr != ' ' && *ptr != '\t' && *ptr != '\0' && *ptr != '\n' &&
*ptr != '=' && *ptr != ',')
{
*string++ = *ptr++;
}
*string = '\0';
*uptr = ptr;
return;
}
/*
* Function: rc_avpair_parse
*
* Purpose: parses the buffer to extract the attribute-value pairs.
*
* Returns: 0 = successful parse of attribute-value pair,
* -1 = syntax (or other) error detected.
*
*/
#define PARSE_MODE_NAME 0
#define PARSE_MODE_EQUAL 1
#define PARSE_MODE_VALUE 2
#define PARSE_MODE_INVALID 3
int rc_avpair_parse (char *buffer, VALUE_PAIR **first_pair)
{
int mode;
char attrstr[AUTH_ID_LEN];
char valstr[AUTH_ID_LEN];
DICT_ATTR *attr = NULL;
DICT_VALUE *dval;
VALUE_PAIR *pair;
VALUE_PAIR *link;
struct tm *tm;
time_t timeval;
mode = PARSE_MODE_NAME;
while (*buffer != '\n' && *buffer != '\0')
{
if (*buffer == ' ' || *buffer == '\t')
{
buffer++;
continue;
}
switch (mode)
{
case PARSE_MODE_NAME: /* Attribute Name */
rc_fieldcpy (attrstr, &buffer);
if ((attr =
rc_dict_findattr (attrstr)) == (DICT_ATTR *) NULL)
{
error("rc_avpair_parse: unknown attribute");
if (*first_pair) {
rc_avpair_free(*first_pair);
*first_pair = (VALUE_PAIR *) NULL;
}
return (-1);
}
mode = PARSE_MODE_EQUAL;
break;
case PARSE_MODE_EQUAL: /* Equal sign */
if (*buffer == '=')
{
mode = PARSE_MODE_VALUE;
buffer++;
}
else
{
error("rc_avpair_parse: missing or misplaced equal sign");
if (*first_pair) {
rc_avpair_free(*first_pair);
*first_pair = (VALUE_PAIR *) NULL;
}
return (-1);
}
break;
case PARSE_MODE_VALUE: /* Value */
rc_fieldcpy (valstr, &buffer);
if ((pair =
(VALUE_PAIR *) malloc (sizeof (VALUE_PAIR)))
== (VALUE_PAIR *) NULL)
{
novm("rc_avpair_parse");
if (*first_pair) {
rc_avpair_free(*first_pair);
*first_pair = (VALUE_PAIR *) NULL;
}
return (-1);
}
strcpy (pair->name, attr->name);
pair->attribute = attr->value;
pair->type = attr->type;
pair->vendorcode = attr->vendorcode;
switch (pair->type)
{
case PW_TYPE_STRING:
strcpy (pair->strvalue, valstr);
pair->lvalue = strlen(valstr);
break;
case PW_TYPE_INTEGER:
if (isdigit (*valstr))
{
pair->lvalue = atoi (valstr);
}
else
{
if ((dval = rc_dict_findval (valstr))
== (DICT_VALUE *) NULL)
{
error("rc_avpair_parse: unknown attribute value: %s", valstr);
if (*first_pair) {
rc_avpair_free(*first_pair);
*first_pair = (VALUE_PAIR *) NULL;
}
free (pair);
return (-1);
}
else
{
pair->lvalue = dval->value;
}
}
break;
case PW_TYPE_IPADDR:
pair->lvalue = rc_get_ipaddr(valstr);
break;
case PW_TYPE_DATE:
timeval = time (0);
tm = localtime (&timeval);
tm->tm_hour = 0;
tm->tm_min = 0;
tm->tm_sec = 0;
rc_str2tm (valstr, tm);
#ifdef TIMELOCAL
pair->lvalue = (UINT4) timelocal (tm);
#else /* TIMELOCAL */
pair->lvalue = (UINT4) mktime (tm);
#endif /* TIMELOCAL */
break;
default:
error("rc_avpair_parse: unknown attribute type %d", pair->type);
if (*first_pair) {
rc_avpair_free(*first_pair);
*first_pair = (VALUE_PAIR *) NULL;
}
free (pair);
return (-1);
}
pair->next = (VALUE_PAIR *) NULL;
if (*first_pair == (VALUE_PAIR *) NULL)
{
*first_pair = pair;
}
else
{
link = *first_pair;
while (link->next != (VALUE_PAIR *) NULL)
{
link = link->next;
}
link->next = pair;
}
mode = PARSE_MODE_NAME;
break;
default:
mode = PARSE_MODE_NAME;
break;
}
}
return (0);
}
/*
* Function: rc_avpair_tostr
*
* Purpose: Translate an av_pair into two strings
*
* Returns: 0 on success, -1 on failure
*
*/
int rc_avpair_tostr (VALUE_PAIR *pair, char *name, int ln, char *value, int lv)
{
DICT_VALUE *dval;
char buffer[32];
struct in_addr inad;
unsigned char *ptr;
*name = *value = '\0';
if (!pair || pair->name[0] == '\0') {
error("rc_avpair_tostr: pair is NULL or empty");
return (-1);
}
strncpy(name, pair->name, (size_t) ln);
switch (pair->type)
{
case PW_TYPE_STRING:
lv--;
ptr = (unsigned char *) pair->strvalue;
while (*ptr != '\0')
{
if (!(isprint (*ptr)))
{
sprintf (buffer, "\\%03o", *ptr);
strncat(value, buffer, (size_t) lv);
lv -= 4;
if (lv < 0) break;
}
else
{
strncat(value, ptr, 1);
lv--;
if (lv < 0) break;
}
ptr++;
}
break;
case PW_TYPE_INTEGER:
dval = rc_dict_getval (pair->lvalue, pair->name);
if (dval != (DICT_VALUE *) NULL)
{
strncpy(value, dval->name, (size_t) lv-1);
}
else
{
sprintf (buffer, "%ld", pair->lvalue);
strncpy(value, buffer, (size_t) lv);
}
break;
case PW_TYPE_IPADDR:
inad.s_addr = htonl(pair->lvalue);
strncpy (value, inet_ntoa (inad), (size_t) lv-1);
break;
case PW_TYPE_DATE:
strftime (buffer, sizeof (buffer), "%m/%d/%y %H:%M:%S",
gmtime ((time_t *) & pair->lvalue));
strncpy(value, buffer, lv-1);
break;
default:
error("rc_avpair_tostr: unknown attribute type %d", pair->type);
return (-1);
break;
}
return 0;
}
/*
* Function: rc_avpair_readin
*
* Purpose: get a sequence of attribute value pairs from the file input
* and make them into a list of value_pairs
*
*/
VALUE_PAIR *rc_avpair_readin(FILE *input)
{
VALUE_PAIR *vp = NULL;
char buffer[1024], *q;
while (fgets(buffer, sizeof(buffer), input) != NULL)
{
q = buffer;
while(*q && isspace(*q)) q++;
if ((*q == '\n') || (*q == '#') || (*q == '\0'))
continue;
if (rc_avpair_parse(q, &vp) < 0) {
error("rc_avpair_readin: malformed attribute: %s", buffer);
rc_avpair_free(vp);
return NULL;
}
}
return vp;
}