* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
+/** @file lib/addr.c Socket address support */
#include <config.h>
#include "types.h"
#include "configuration.h"
#include "addr.h"
+/** @brief Convert a pair of strings to an address
+ * @param a Pointer to string list
+ * @param pref Hints structure for getaddrinfo, or NULL
+ * @param namep Where to store address description, or NULL
+ * @return Address info structure or NULL on error
+ *
+ * This converts one or two strings into an address specification suitable
+ * for passing to socket(), bind() etc.
+ *
+ * If there is only one string then it is assumed to be the service
+ * name (port number). If there are two then the first is the host
+ * name and the second the service name.
+ *
+ * @p namep is used to return a description of the address suitable
+ * for use in log messages.
+ *
+ * If an error occurs a message is logged and a null pointer returned.
+ */
struct addrinfo *get_address(const struct stringlist *a,
const struct addrinfo *pref,
char **namep) {
struct addrinfo *res;
char *name;
int rc;
-
- if(a->n == 1) {
+
+ switch(a->n) {
+ case 1:
byte_xasprintf(&name, "host * service %s", a->s[0]);
if((rc = getaddrinfo(0, a->s[0], pref, &res))) {
error(0, "getaddrinfo %s: %s", a->s[0], gai_strerror(rc));
return 0;
}
- } else {
+ break;
+ case 2:
byte_xasprintf(&name, "host %s service %s", a->s[0], a->s[1]);
if((rc = getaddrinfo(a->s[0], a->s[1], pref, &res))) {
error(0, "getaddrinfo %s %s: %s", a->s[0], a->s[1], gai_strerror(rc));
return 0;
}
+ break;
+ default:
+ error(0, "invalid network address specification (n=%d)", a->n);
+ return 0;
}
- if(!res || res->ai_socktype != SOCK_STREAM) {
- error(0, "getaddrinfo didn't give us a stream socket");
+ if(!res || (pref && res->ai_socktype != pref->ai_socktype)) {
+ error(0, "getaddrinfo didn't give us a suitable socket address");
if(res)
freeaddrinfo(res);
return 0;
return res;
}
+/** @brief Comparison function for address information
+ *
+ * Suitable for qsort().
+ */
int addrinfocmp(const struct addrinfo *a,
const struct addrinfo *b) {
const struct sockaddr_in *ina, *inb;
comment-column:40
End:
*/
-/* arch-tag:e143b5b1b677e108d957da2f6d09bccd */