diff options
| -rw-r--r-- | networking/wget.c | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/networking/wget.c b/networking/wget.c index d518286..26b62cc 100644 --- a/networking/wget.c +++ b/networking/wget.c @@ -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; |