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guri: Move IP-literal parsing out into a separate function

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This introduces no functional changes, but will make future changes to
the code a little cleaner.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
This commit is contained in:
Philip Withnall 2020-09-30 17:45:19 +01:00
parent aa6aa0de42
commit 58fce4b92b
1 changed files with 65 additions and 33 deletions
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98
glib/guri.c
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@ -442,6 +442,68 @@ _uri_encoder (GString *out,
} }
} }
/* Parse the IP-literal construction from RFC 6874 (which extends RFC 3986 to
* support IPv6 zone identifiers.
*
* Rules:
*
* IP-literal = "[" ( IPv6address / IPvFuture ) "]"
*
* IP-literal = "[" ( IPv6address / IPv6addrz / IPvFuture ) "]"
*
* ZoneID = 1*( unreserved / pct-encoded )
*
* IPv6addrz = IPv6address "%25" ZoneID
*/
static gboolean
parse_ip_literal (const gchar *start,
gsize length,
GUriFlags flags,
gchar **out,
GError **error)
{
gchar *pct;
gchar *addr = NULL;
if (start[length - 1] != ']')
{
bad_ipv6_literal:
g_free (addr);
g_set_error (error, G_URI_ERROR, G_URI_ERROR_BAD_HOST,
_("Invalid IPv6 address ‘%.*s’ in URI"),
(gint)length, start);
return FALSE;
}
addr = g_strndup (start + 1, length - 2);
/* If there's an IPv6 scope id, ignore it for the moment. */
pct = strchr (addr, '%');
if (pct)
*pct = '\0';
/* addr must be an IPv6 address */
if (!g_hostname_is_ip_address (addr) || !strchr (addr, ':'))
goto bad_ipv6_literal;
if (pct)
{
*pct = '%';
if (strchr (pct + 1, '%'))
goto bad_ipv6_literal;
/* If the '%' is encoded as '%25' (which it should be), decode it */
if (pct[1] == '2' && pct[2] == '5' && pct[3])
memmove (pct + 1, pct + 3, strlen (pct + 3) + 1);
}
/* Success */
if (out != NULL)
*out = g_steal_pointer (&addr);
g_free (addr);
return TRUE;
}
static gboolean static gboolean
parse_host (const gchar *start, parse_host (const gchar *start,
gsize length, gsize length,
@ -449,43 +511,13 @@ parse_host (const gchar *start,
gchar **out, gchar **out,
GError **error) GError **error)
{ {
gchar *decoded, *host, *pct; gchar *decoded, *host;
gchar *addr = NULL; gchar *addr = NULL;
if (*start == '[') if (*start == '[')
{ {
if (start[length - 1] != ']') if (!parse_ip_literal (start, length, flags, &host, error))
{ return FALSE;
bad_ipv6_literal:
g_free (addr);
g_set_error (error, G_URI_ERROR, G_URI_ERROR_BAD_HOST,
_("Invalid IPv6 address ‘%.*s’ in URI"),
(gint)length, start);
return FALSE;
}
addr = g_strndup (start + 1, length - 2);
/* If there's an IPv6 scope id, ignore it for the moment. */
pct = strchr (addr, '%');
if (pct)
*pct = '\0';
/* addr must be an IPv6 address */
if (!g_hostname_is_ip_address (addr) || !strchr (addr, ':'))
goto bad_ipv6_literal;
if (pct)
{
*pct = '%';
if (strchr (pct + 1, '%'))
goto bad_ipv6_literal;
/* If the '%' is encoded as '%25' (which it should be), decode it */
if (pct[1] == '2' && pct[2] == '5' && pct[3])
memmove (pct + 1, pct + 3, strlen (pct + 3) + 1);
}
host = addr;
goto ok; goto ok;
} }