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wget: remove IPv6 scope id in Host: field (apache compat)

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-06-30 20:36:27 +02:00
parent 8bca3e20b9
commit 7d5ddf14a3
1 changed files with 51 additions and 3 deletions
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54
networking/wget.c
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@ -193,6 +193,42 @@ static ALWAYS_INLINE void progress_meter(int flag UNUSED_PARAM) { }
#endif
/* IPv6 knows scoped address types i.e. link and site local addresses. Link
* local addresses can have a scope identifier to specify the
* interface/link an address is valid on (e.g. fe80::1%eth0). This scope
* identifier is only valid on a single node.
*
* RFC 4007 says that the scope identifier MUST NOT be sent across the wire,
* unless all nodes agree on the semantic. Apache e.g. regards zone identifiers
* in the Host header as invalid requests, see
* https://issues.apache.org/bugzilla/show_bug.cgi?id=35122
*/
static void strip_ipv6_scope_id(char *host)
{
char *scope, *cp;
/* bbox wget actually handles IPv6 addresses without [], like
* wget "http://::1/xxx", but this is not standard.
* To save code, _here_ we do not support it. */
if (host[0] != '[')
return; /* not IPv6 */
scope = strchr(host, '%');
if (!scope)
return;
/* Remove the IPv6 zone identifier from the host address */
cp = strchr(host, ']');
if (!cp || (cp[1] != ':' && cp[1] != '\0')) {
/* malformed address (not "[xx]:nn" or "[xx]") */
return;
}
/* cp points to "]...", scope points to "%eth0]..." */
overlapping_strcpy(scope, cp);
}
/* Read NMEMB bytes into PTR from STREAM. Returns the number of bytes read,
* and a short count if an eof or non-interrupt error is encountered. */
static size_t safe_fread(void *ptr, size_t nmemb, FILE *stream)
@ -655,20 +691,30 @@ int wget_main(int argc UNUSED_PARAM, char **argv)
#endif
/* TODO: compat issue: should handle "wget URL1 URL2..." */
parse_url(argv[optind], &target);
server.host = target.host;
server.port = target.port;
/* Use the proxy if necessary */
use_proxy = (strcmp(proxy_flag, "off") != 0);
if (use_proxy) {
proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
if (proxy && *proxy) {
if (proxy && proxy[0]) {
parse_url(proxy, &server);
} else {
use_proxy = 0;
}
}
if (!use_proxy) {
server.port = target.port;
if (ENABLE_FEATURE_IPV6) {
server.host = xstrdup(target.host);
} else {
server.host = target.host;
}
}
if (ENABLE_FEATURE_IPV6)
strip_ipv6_scope_id(target.host);
/* Guess an output filename, if there was no -O FILE */
if (!(opt & WGET_OPT_OUTNAME)) {
@ -862,6 +908,8 @@ However, in real world it was observed that some web servers
parse_url(str, &target);
if (!use_proxy) {
server.host = target.host;
/* strip_ipv6_scope_id(target.host); - no! */
/* we assume remote never gives us IPv6 addr with scope id */
server.port = target.port;
free(lsa);
goto resolve_lsa;