On date Thursday 2008-06-12 13:40:25 +0300, Pekka Pessi wrote:
> 2008/6/10 Stefano Sabatini <[EMAIL PROTECTED]>:
> > I'm trying to understand how the sresolv "simple" interface works.
>
> "Simple" interface is intended for cases where your main loop is
> running with su_root_t.
> You can try to use "blocking" interface, see utils/sip-dig.c for an example.
Thank you Pekka,
here it is a complete example of use of the blocking interface.
somehow extrapolated by sip-dig.c.
I'm posting it for the archive.
-----------------------------------8<-----------------------------------------
#include <sofia-sip/sresolv.h>
#include <sofia-sip/su_log.h>
#include "sofia-sip/url.h"
#include <stdlib.h>
#include <stdio.h>
int main(int argc, char** argv)
{
url_t *url;
if (argc <= 1) {
fprintf(stderr, "Missing the address to resolve");
exit(1);
}
const char* url_str = argv[1];
/* parse the string and fill accordingly all the fields of the url struct */
url = url_hdup(NULL, (void *)url_str);
if (url && url->url_type == url_unknown)
url_sanitize(url);
/* Initialize Sofia-SIP library and create event loop */
su_init ();
su_log_set_level(NULL, 9);
/* root = su_root_create(NULL); */
/* at first I need to create the DNS resolver object */
/* blocking interface */
/* instantiate the resolver */
sres_resolver_t* sres = sres_resolver_new(NULL);
if(!sres) {
fprintf(stderr, "Impossible to instantiate a resolver, exiting");
exit(1);
}
/* then I need the sres_record_t struct where to put the request for the
query */
sres_record_t** answers= NULL;
const char *resolvaddr = NULL;
if (host_is_ip_address(url->url_host)) {
/* it's already resolved, no need to ask the DNS server */
printf("%s\n", url->url_host);
exit(0);
}
if (sres_blocking_query(sres, sres_type_a, url->url_host, 0, &answers) < 0)
{
fprintf(stderr, "Impossible to resolve address: %s", url);
exit(1);
}
int i;
char addr[64];
for (i = 0; answers[i]; i++) {
/* sofia redefines the inet_ntop if it isn't already defined in the
system */
su_inet_ntop(AF_INET, &answers[i]->sr_a->a_addr, addr, sizeof addr);
printf("%s\n", addr);
}
sres_free_answers(sres, answers);
sres_resolver_unref(sres);
exit(0);
}
-----------------------------------8<-----------------------------------------
Regards.
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