void
my_browse_hook(struct mdns *m, int ev, const char *name, const char *app,
const char *proto)
{
switch (ev) {
case MDNS_SERVICE_UP:
/* If no name, this is a service type */
if (name == NULL) {
if (mdns_browse_add(m, app, proto) == -1)
err(1, "mdns_browse_add");
return;
}
if (res->flags & F_RESOLV) {
if (mdns_resolve(m, name, app, proto) == -1)
err(1, "mdns_resolve");
return;
}
if (res->flags & F_SCRIPT)
printf("up|proto|%s|app|%s|name|%s\n", proto, app, name);
else
printf("+++ %-48s %-20s %-3s\n", name, app, proto);
break;
case MDNS_SERVICE_DOWN:
if (name != NULL) {
if (res->flags & F_SCRIPT)
printf("down|proto|%s|app|%s|name|%s\n", proto, app, name);
else
printf("--- %-48s %-20s %-3s\n", name, app, proto);
}
break;
default:
errx(1, "Unhandled event");
break;
}
}
int
mdns_init(struct mdns_ctx **p_ctx, const char *addr, unsigned short port)
{
const uint32_t on_off = 1;
const uint32_t ttl = 255;
const uint8_t loop = 1;
#ifdef _WIN32
union {
struct sockaddr_storage ss;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} dumb;
#endif /* _WIN32 */
struct mdns_ctx *ctx;
if (p_ctx == NULL)
return (MDNS_STDERR);
*p_ctx = malloc(sizeof(struct mdns_ctx));
if (*p_ctx == NULL)
return (MDNS_STDERR);
ctx = *p_ctx;
ctx->sock = INVALID_SOCKET;
errno = os_init("2.2");
if (errno != 0)
return (MDNS_NETERR);
if (mdns_resolve(&ctx->addr, addr, port) < 0)
return (MDNS_LKPERR);
if ((ctx->sock = socket(ss_family(&ctx->addr), SOCK_DGRAM, IPPROTO_UDP)) == INVALID_SOCKET)
return (MDNS_NETERR);
if (setsockopt(ctx->sock, SOL_SOCKET, SO_REUSEADDR, (const void *) &on_off, sizeof(on_off)) < 0)
return (MDNS_NETERR);
#ifdef _WIN32
/* bind the receiver on any local address */
memset(&dumb, 0, sizeof(dumb));
dumb.ss.ss_family = ss_family(&ctx->addr);
if (dumb.ss.ss_family == AF_INET) {
dumb.sin.sin_port = htons(port);
dumb.sin.sin_addr.s_addr = INADDR_ANY;
} else {
dumb.sin6.sin6_port = htons(port);
dumb.sin6.sin6_addr = in6addr_any;
}
if (bind(ctx->sock, (const struct sockaddr *) &dumb, ss_len(&dumb.ss)) < 0)
return (MDNS_NETERR);
#else /* _WIN32 */
if (bind(ctx->sock, (const struct sockaddr *) &ctx->addr, ss_len(&ctx->addr)) < 0)
return (MDNS_NETERR);
#endif /* _WIN32 */
if (os_mcast_join(ctx->sock, &ctx->addr) < 0)
return (MDNS_NETERR);
if (setsockopt(ctx->sock, ss_level(&ctx->addr), ss_family(&ctx->addr)==AF_INET ? IP_MULTICAST_TTL : IPV6_MULTICAST_HOPS, (const void *) &ttl, sizeof(ttl)) < 0)
return (MDNS_NETERR);
if (setsockopt(ctx->sock, ss_level(&ctx->addr), IP_MULTICAST_LOOP, (const void *) &loop, sizeof(loop)) < 0)
return (MDNS_NETERR);
ctx->services = NULL;
return (0);
}
