-/* $Id$ */
-
/***
This file is part of avahi.
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+
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
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+
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
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+
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
char *avahi_unescape_label(const char **name, char *dest, size_t size) {
unsigned i = 0;
char *d;
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assert(dest);
assert(size > 0);
assert(name);
d = dest;
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for (;;) {
if (i >= size)
return NULL;
(*name)++;
break;
}
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+
if (**name == 0)
break;
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if (**name == '\\') {
/* Escaped character */
if (**name == 0)
/* Ending NUL */
return NULL;
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+
else if (**name == '\\' || **name == '.') {
/* Escaped backslash or dot */
*(d++) = *((*name) ++);
int n;
/* Escaped literal ASCII character */
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if (!isdigit(*(*name+1)) || !isdigit(*(*name+2)))
return NULL;
if (n > 255 || n == 0)
return NULL;
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*(d++) = (char) n;
i++;
(*name) += 3;
} else
return NULL;
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} else {
/* Normal character */
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*(d++) = *((*name) ++);
i++;
}
if (*src == '.' || *src == '\\') {
/* Dot or backslash */
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if (*ret_size < 3)
return NULL;
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*((*ret_name) ++) = '\\';
*((*ret_name) ++) = *src;
(*ret_size) -= 2;
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} else if (
*src == '_' ||
*src == '-' ||
(*src >= 'A' && *src <= 'Z')) {
/* Proper character */
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if (*ret_size < 2)
return NULL;
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*((*ret_name)++) = *src;
(*ret_size) --;
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} else {
/* Everything else */
*((*ret_name) ++) = '0' + (char) ((uint8_t) *src / 100);
*((*ret_name) ++) = '0' + (char) (((uint8_t) *src / 10) % 10);
*((*ret_name) ++) = '0' + (char) ((uint8_t) *src % 10);
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(*ret_size) -= 4;
}
char *avahi_normalize_name(const char *s, char *ret_s, size_t size) {
int empty = 1;
char *r;
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assert(s);
assert(ret_s);
assert(size > 0);
return NULL;
}
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if (!empty) {
if (size < 1)
return NULL;
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*(r++) = '.';
size--;
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} else
empty = 0;
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avahi_escape_label(label, strlen(label), &r, &size);
}
if (a == b)
return 1;
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for (;;) {
char ca[AVAHI_LABEL_MAX], cb[AVAHI_LABEL_MAX], *r;
if (strcasecmp(ca, cb))
return 0;
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if (!*a && !*b)
return 1;
}
if (strlen(label) <= 2 || label[0] != '_')
return 0;
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} while (*t);
return 1;
return 0;
/* Application name */
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if (!(avahi_unescape_label(&t, label, sizeof(label))))
return 0;
return 0;
/* _tcp or _udp boilerplate */
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if (!(avahi_unescape_label(&t, label, sizeof(label))))
return 0;
if (*t)
return 0;
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return 1;
}
return NULL;
/* Subtype name */
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if (!(avahi_unescape_label(&t, label, sizeof(label))))
return NULL;
return NULL;
/* String "_sub" */
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if (!(avahi_unescape_label(&t, label, sizeof(label))))
return NULL;
return NULL;
ret = t;
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/* Application name */
if (!(avahi_unescape_label(&t, label, sizeof(label))))
if (!*t)
return NULL;
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/* _tcp or _udp boilerplate */
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if (!(avahi_unescape_label(&t, label, sizeof(label))))
return NULL;
/* Explicitly allow the root domain name */
if (is_first && label[0] == 0 && *t == 0)
return 1;
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is_first = 0;
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if (label[0] == 0)
return 0;
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} while (*t);
return 1;
if (strlen(t) >= AVAHI_LABEL_MAX || !*t)
return 0;
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return 1;
}
unsigned avahi_domain_hash(const char *s) {
unsigned hash = 0;
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while (*s) {
char c[AVAHI_LABEL_MAX], *p, *r;
char escaped_name[AVAHI_LABEL_MAX*4];
char normalized_type[AVAHI_DOMAIN_NAME_MAX];
char normalized_domain[AVAHI_DOMAIN_NAME_MAX];
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assert(p);
/* Validity checks */
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if ((name && !avahi_is_valid_service_name(name)))
return AVAHI_ERR_INVALID_SERVICE_NAME;
if (!avahi_is_valid_service_type_generic(type))
return AVAHI_ERR_INVALID_SERVICE_TYPE;
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if (!avahi_is_valid_domain_name(domain))
return AVAHI_ERR_INVALID_DOMAIN_NAME;
/* Preparation */
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if (name) {
size_t l = sizeof(escaped_name);
char *e = escaped_name, *r;
return AVAHI_ERR_INVALID_DOMAIN_NAME;
/* Concatenation */
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snprintf(p, size, "%s%s%s.%s", name ? escaped_name : "", name ? "." : "", normalized_type, normalized_domain);
return AVAHI_OK;
static size_t strlcpy(char *dest, const char *src, size_t n) {
assert(dest);
assert(src);
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if (n > 0) {
strncpy(dest, src, n-1);
dest[n-1] = 0;
}
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return strlen(src);
}
DOMAIN
} state;
int type_empty = 1, domain_empty = 1;
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assert(p);
assert(type);
assert(type_size > 0);
state = NAME;
} else
state = TYPE;
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*type = *domain = 0;
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while (*p) {
char buf[64];
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if (!(avahi_unescape_label(&p, buf, sizeof(buf))))
return -1;
if (!type_empty) {
if (!type_size)
return AVAHI_ERR_NO_MEMORY;
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*(type++) = '.';
type_size --;
} else
type_empty = 0;
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+
if (!(avahi_escape_label(buf, strlen(buf), &type, &type_size)))
return AVAHI_ERR_NO_MEMORY;
break;
- }
+ }
state = DOMAIN;
/* fall through */
if (!domain_empty) {
if (!domain_size)
return AVAHI_ERR_NO_MEMORY;
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+
*(domain++) = '.';
domain_size --;
} else
/* Make sure that the name is not an IP address */
if (!(avahi_normalize_name(t, normalized, sizeof(normalized))))
return 0;
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+
if (avahi_address_parse(normalized, AVAHI_PROTO_UNSPEC, &a))
return 0;