MINOR: standard: Add ipv6 support in the function url2sa().
The function url2sa() converts faster url like http://<ip>:<port> in a
struct sockaddr_storage. This patch add:
- the https support
- permit to return the length parsed
- support IPv6
- support DNS synchronous resolution only during start of haproxy.
The faster IPv4 convertion way is keeped. IPv6 is slower, because I use
the standard IPv6 parser function.
diff --git a/src/standard.c b/src/standard.c
index d435c3c..569ecaa 100644
--- a/src/standard.c
+++ b/src/standard.c
@@ -24,6 +24,7 @@
#include <common/chunk.h>
#include <common/config.h>
#include <common/standard.h>
+#include <types/global.h>
#include <eb32tree.h>
/* enough to store NB_ITOA_STR integers of :
@@ -939,20 +940,25 @@
}
/*
- * Resolve destination server from URL. Convert <str> to a sockaddr_storage*.
+ * Resolve destination server from URL. Convert <str> to a sockaddr_storage.
+ * <out> contain the code of the dectected scheme, the start and length of
+ * the hostname. Actually only http and https are supported. <out> can be NULL.
+ * This function returns the consumed length. It is useful if you parse complete
+ * url like http://host:port/path, because the consumed length corresponds to
+ * the first character of the path. If the conversion fails, it returns -1.
+ *
+ * This function tries to resolve the DNS name if haproxy is in starting mode.
+ * So, this function may be used during the configuration parsing.
*/
-int url2sa(const char *url, int ulen, struct sockaddr_storage *addr)
+int url2sa(const char *url, int ulen, struct sockaddr_storage *addr, struct split_url *out)
{
const char *curr = url, *cp = url;
+ const char *end;
int ret, url_code = 0;
- unsigned int http_code = 0;
-
- /* Cleanup the room */
-
- /* FIXME: assume IPv4 only for now */
- ((struct sockaddr_in *)addr)->sin_family = AF_INET;
- ((struct sockaddr_in *)addr)->sin_addr.s_addr = 0;
- ((struct sockaddr_in *)addr)->sin_port = 0;
+ unsigned long long int http_code = 0;
+ int default_port;
+ struct hostent *he;
+ char *p;
/* Firstly, try to find :// pattern */
while (curr < url+ulen && url_code != 0x3a2f2f) {
@@ -966,28 +972,138 @@
*
* WARNING: Current code doesn't support dynamic async dns resolver.
*/
- if (url_code == 0x3a2f2f) {
- while (cp < curr - 3)
- http_code = (http_code << 8) + *cp++;
- http_code |= 0x20202020; /* Turn everything to lower case */
+ if (url_code != 0x3a2f2f)
+ return -1;
+
+ /* Copy scheme, and utrn to lower case. */
+ while (cp < curr - 3)
+ http_code = (http_code << 8) + *cp++;
+ http_code |= 0x2020202020202020ULL; /* Turn everything to lower case */
- /* HTTP url matching */
- if (http_code == 0x68747470) {
- /* We are looking for IP address. If you want to parse and
- * resolve hostname found in url, you can use str2sa_range(), but
- * be warned this can slow down global daemon performances
- * while handling lagging dns responses.
+ /* HTTP or HTTPS url matching */
+ if (http_code == 0x2020202068747470ULL) {
+ default_port = 80;
+ if (out)
+ out->scheme = SCH_HTTP;
+ }
+ else if (http_code == 0x2020206874747073ULL) {
+ default_port = 443;
+ if (out)
+ out->scheme = SCH_HTTPS;
+ }
+ else
+ return -1;
+
+ /* If the next char is '[', the host address is IPv6. */
+ if (*curr == '[') {
+ curr++;
+
+ /* Check trash size */
+ if (trash.size < ulen)
+ return -1;
+
+ /* Look for ']' and copy the address in a trash buffer. */
+ p = trash.str;
+ for (end = curr;
+ end < url + ulen && *end != ']';
+ end++, p++)
+ *p = *end;
+ if (*end != ']')
+ return -1;
+ *p = '\0';
+
+ /* Update out. */
+ if (out) {
+ out->host = curr;
+ out->host_len = end - curr;
+ }
+
+ /* Try IPv6 decoding. */
+ if (!inet_pton(AF_INET6, trash.str, &((struct sockaddr_in6 *)addr)->sin6_addr))
+ return -1;
+ end++;
+
+ /* Decode port. */
+ if (*end == ':') {
+ end++;
+ default_port = read_uint(&end, url + ulen);
+ }
+ ((struct sockaddr_in6 *)addr)->sin6_port = htons(default_port);
+ ((struct sockaddr_in6 *)addr)->sin6_family = AF_INET6;
+ return end - url;
+ }
+ else {
+ /* We are looking for IP address. If you want to parse and
+ * resolve hostname found in url, you can use str2sa_range(), but
+ * be warned this can slow down global daemon performances
+ * while handling lagging dns responses.
+ */
+ ret = url2ipv4(curr, &((struct sockaddr_in *)addr)->sin_addr);
+ if (ret) {
+ /* Update out. */
+ if (out) {
+ out->host = curr;
+ out->host_len = ret;
+ }
+
+ curr += ret;
+
+ /* Decode port. */
+ if (*curr == ':') {
+ curr++;
+ default_port = read_uint(&curr, url + ulen);
+ }
+ ((struct sockaddr_in *)addr)->sin_port = htons(default_port);
+
+ /* Set family. */
+ ((struct sockaddr_in *)addr)->sin_family = AF_INET;
+ return curr - url;
+ }
+ else if (global.mode & MODE_STARTING) {
+ /* The IPv4 and IPv6 decoding fails, maybe the url contain name. Try to execute
+ * synchronous DNS request only if HAProxy is in the start state.
*/
- ret = url2ipv4(curr, &((struct sockaddr_in *)addr)->sin_addr);
- if (!ret)
+
+ /* look for : or / or end */
+ for (end = curr;
+ end < url + ulen && *end != '/' && *end != ':';
+ end++);
+ memcpy(trash.str, curr, end - curr);
+ trash.str[end - curr] = '\0';
+
+ /* try to resolve an IPv4/IPv6 hostname */
+ he = gethostbyname(trash.str);
+ if (!he)
return -1;
- curr += ret;
- ((struct sockaddr_in *)addr)->sin_port = (*curr == ':') ? str2uic(++curr) : 80;
- ((struct sockaddr_in *)addr)->sin_port = htons(((struct sockaddr_in *)addr)->sin_port);
+
+ /* Update out. */
+ if (out) {
+ out->host = curr;
+ out->host_len = end - curr;
+ }
+
+ /* Decode port. */
+ if (*end == ':') {
+ end++;
+ default_port = read_uint(&end, url + ulen);
+ }
+
+ /* Copy IP address, set port and family. */
+ switch (he->h_addrtype) {
+ case AF_INET:
+ ((struct sockaddr_in *)addr)->sin_addr = *(struct in_addr *) *(he->h_addr_list);
+ ((struct sockaddr_in *)addr)->sin_port = htons(default_port);
+ ((struct sockaddr_in *)addr)->sin_family = AF_INET;
+ return end - url;
+
+ case AF_INET6:
+ ((struct sockaddr_in6 *)addr)->sin6_addr = *(struct in6_addr *) *(he->h_addr_list);
+ ((struct sockaddr_in6 *)addr)->sin6_port = htons(default_port);
+ ((struct sockaddr_in6 *)addr)->sin6_family = AF_INET6;
+ return end - url;
+ }
}
- return 0;
}
-
return -1;
}