diff options
Diffstat (limited to 'src/dnsstub/dns_resolve.c')
-rw-r--r-- | src/dnsstub/dns_resolve.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/dnsstub/dns_resolve.c b/src/dnsstub/dns_resolve.c new file mode 100644 index 0000000..bcc4308 --- /dev/null +++ b/src/dnsstub/dns_resolve.c @@ -0,0 +1,39 @@ +#include "iopause.h" +#include "taia.h" +#include "byte.h" +#include "ip.h" +#include "dnsresolv.h" + +/** + @file dns_resolve.c + @author djb, fefe, feh + @source ucspi-tcp + @brief high-level DNS resolve function +*/ + +struct dns_transmit dns_resolve_tx = {0}; + +int dns_resolve(const char *q,const char qtype[2]) +{ + struct taia stamp; + struct taia deadline; + char servers[QUERY_MAXIPLEN]; + uint32 scopes[QUERY_MAXNS]; + iopause_fd x[1]; + int r; + + if (dns_resolvconfip(servers,scopes) < 0) return DNS_INT; + + if (dns_transmit_start6(&dns_resolve_tx,servers,1,q,qtype,(const char *)V6localnet,scopes) < 0) return DNS_COM; + + for (;;) { + taia_now(&stamp); + taia_uint(&deadline,120); + taia_add(&deadline,&deadline,&stamp); + dns_transmit_io(&dns_resolve_tx,x,&deadline); + iopause(x,1,&deadline,&stamp); + r = dns_transmit_get(&dns_resolve_tx,x,&stamp); + if (r < 0) return DNS_COM; + if (r == 1) return 0; + } +} |