diff options
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/inet/Makefile | 2 | ||||
| -rw-r--r-- | libc/inet/resolv.c | 89 |
2 files changed, 41 insertions, 50 deletions
diff --git a/libc/inet/Makefile b/libc/inet/Makefile index bc29ec74f..4614e1452 100644 --- a/libc/inet/Makefile +++ b/libc/inet/Makefile @@ -42,7 +42,7 @@ MOBJ2=encodeh.o decodeh.o encoded.o decoded.o lengthd.o encodeq.o \ closenameservers.o resolvename.o gethostbyname.o res_init.o \ res_query.o gethostbyaddr.o read_etc_hosts_r.o get_hosts_byname_r.o \ get_hosts_byaddr_r.o gethostbyname2.o getnameinfo.o gethostent.o \ - gethostbyname_r.o gethostbyname2_r.o gethostbyaddr_r.o connect_dns.o + gethostbyname_r.o gethostbyname2_r.o gethostbyaddr_r.o MSRC3=socketcalls.c MOBJ3= accept.o bind.o connect.o getpeername.o getsockname.o getsockopt.o \ diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c index ca8f4c7ba..8c985ba33 100644 --- a/libc/inet/resolv.c +++ b/libc/inet/resolv.c @@ -166,7 +166,6 @@ extern int __read_etc_hosts_r(FILE *fp, const char * name, int type, char * buf, size_t buflen, struct hostent ** result, int * h_errnop); -extern int __connect_dns(char *dns); extern int __dns_lookup(const char * name, int type, int nscount, char ** nsip, unsigned char ** outpacket, struct resolv_answer * a); @@ -561,45 +560,6 @@ int __form_query(int id, const char *name, int type, unsigned char *packet, } #endif -#ifdef L_connect_dns -int __connect_dns(char *nsip) -{ - int fd, rc; - struct sockaddr_in sa; -#ifdef __UCLIBC_HAS_IPV6__ - int v6; - struct sockaddr_in6 sa6; - v6 = inet_pton(AF_INET6, nsip, &sa6.sin6_addr) > 0; - fd = socket(v6 ? AF_INET6 : AF_INET, SOCK_DGRAM, IPPROTO_UDP); -#else - fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); -#endif - if (fd == -1) return -1; - -#ifdef __UCLIBC_HAS_IPV6__ - if (v6) { - sa6.sin6_family = AF_INET6; - sa6.sin6_port = htons(NAMESERVER_PORT); - /* sa6.sin6_addr is already here */ - rc = connect(fd, (struct sockaddr *) &sa6, sizeof(sa6)); - } else { -#endif - sa.sin_family = AF_INET; - sa.sin_port = htons(NAMESERVER_PORT); - sa.sin_addr.s_addr = inet_addr(nsip); - rc = connect(fd, (struct sockaddr *) &sa, sizeof(sa)); -#ifdef __UCLIBC_HAS_IPV6__ - } -#endif - if (rc != 0) { - close(fd); - return -1; - } - return fd; -} -#endif - - #ifdef L_dnslookup #ifdef __UCLIBC_HAS_THREADS__ @@ -620,7 +580,7 @@ static int ns=0, id=1; int __dns_lookup(const char *name, int type, int nscount, char **nsip, unsigned char **outpacket, struct resolv_answer *a) { - int i, j, len, fd, pos; + int i, j, len, fd, pos, rc; struct timeval tv; fd_set fds; struct resolv_header h; @@ -629,6 +589,11 @@ int __dns_lookup(const char *name, int type, int nscount, char **nsip, unsigned char * packet = malloc(PACKETSZ); char *dns, *lookup = malloc(MAXDNAME); int variant = 0; + struct sockaddr_in sa; +#ifdef __UCLIBC_HAS_IPV6__ + int v6; + struct sockaddr_in6 sa6; +#endif fd = -1; @@ -688,14 +653,39 @@ int __dns_lookup(const char *name, int type, int nscount, char **nsip, DPRINTF("On try %d, sending query to port %d of machine %s\n", retries, NAMESERVER_PORT, dns); - fd = __connect_dns(dns); +#ifdef __UCLIBC_HAS_IPV6__ + v6 = inet_pton(AF_INET6, dns, &sa6.sin6_addr) > 0; + fd = socket(v6 ? AF_INET6 : AF_INET, SOCK_DGRAM, IPPROTO_UDP); +#else + fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); +#endif if (fd < 0) { - if (errno == ENETUNREACH) { - /* routing error, presume not transient */ - goto tryall; - } else - /* retry */ - continue; + continue; + } + + /* Connect to the UDP socket so that asyncronous errors are returned */ +#ifdef __UCLIBC_HAS_IPV6__ + if (v6) { + sa6.sin6_family = AF_INET6; + sa6.sin6_port = htons(NAMESERVER_PORT); + /* sa6.sin6_addr is already here */ + rc = connect(fd, (struct sockaddr *) &sa6, sizeof(sa6)); + } else { +#endif + sa.sin_family = AF_INET; + sa.sin_port = htons(NAMESERVER_PORT); + sa.sin_addr.s_addr = inet_addr(dns); + rc = connect(fd, (struct sockaddr *) &sa, sizeof(sa)); +#ifdef __UCLIBC_HAS_IPV6__ + } +#endif + if (rc < 0) { + if (errno == ENETUNREACH) { + /* routing error, presume not transient */ + goto tryall; + } else + /* retry */ + continue; } DPRINTF("Transmitting packet of length %d, id=%d, qr=%d\n", @@ -716,9 +706,10 @@ int __dns_lookup(const char *name, int type, int nscount, char **nsip, } i = recv(fd, packet, 512, 0); - if (i < HFIXEDSZ) + if (i < HFIXEDSZ) { /* too short ! */ goto again; + } __decode_header(packet, &h); |