diff options
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/inet/Makefile.in | 2 | ||||
| -rw-r--r-- | libc/inet/res_data.c | 8 | ||||
| -rw-r--r-- | libc/inet/resolv.c | 116 |
3 files changed, 124 insertions, 2 deletions
diff --git a/libc/inet/Makefile.in b/libc/inet/Makefile.in index f2a495aa5..09ba65d1a 100644 --- a/libc/inet/Makefile.in +++ b/libc/inet/Makefile.in @@ -41,7 +41,7 @@ CSRC-$(findstring y,$(UCLIBC_HAS_IPV4)$(UCLIBC_HAS_IPV6)) += \ res_init.c res_query.c res_comp.c ns_name.c \ _res_state.c CSRC-$(findstring y,$(UCLIBC_HAS_RESOLVER_SUPPORT)) += \ - ns_netint.c ns_parse.c + ns_netint.c ns_parse.c res_data.c ## # unused ATM ## CSRC-y += encodep.c decodep.c formquery.c diff --git a/libc/inet/res_data.c b/libc/inet/res_data.c new file mode 100644 index 000000000..b554b93db --- /dev/null +++ b/libc/inet/res_data.c @@ -0,0 +1,8 @@ +/* + * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> + * + * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + */ + +#define L_res_data +#include RESOLVER diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c index 011cd5e56..627423b39 100644 --- a/libc/inet/resolv.c +++ b/libc/inet/resolv.c @@ -4081,6 +4081,120 @@ int ns_msg_getflag(ns_msg handle, int flag) { } #endif /* L_ns_parse */ +#ifdef L_res_data +int res_mkquery(int op, const char *dname, int class, int type, + const unsigned char *data, int datalen, + const unsigned char *newrr_in, + unsigned char *buf, int buflen) +{ + HEADER *hp; + unsigned char *cp, *ep; + unsigned char *dnptrs[20], **dpp, **lastdnptr; + uint32_t _res_options; + int n; + + if (!buf || buflen < HFIXEDSZ) { + h_errno = NETDB_INTERNAL; + return -1; + } + + again: + __UCLIBC_MUTEX_LOCK(__resolv_lock); + _res_options = _res.options; + __UCLIBC_MUTEX_UNLOCK(__resolv_lock); + if (!(_res_options & RES_INIT)) { + res_init(); /* our res_init never fails */ + goto again; + } + +#ifdef DEBUG + if (_res_options & RES_DEBUG) + printf(";; res_mkquery(%d, %s, %s, %d, %d)\n", + name, (op, dname ? dname : "<Nil>"), class, type); +#endif + + memset(buf, 0, HFIXEDSZ); + hp = (HEADER *) buf; + hp->id = getpid() & 0xffff; + hp->opcode = op; + hp->rd = (_res.options & RES_RECURSE) != 0U; + hp->rcode = NOERROR; + + cp = buf + HFIXEDSZ; + ep = buf + buflen; + dpp = dnptrs; + *dpp++ = buf; + *dpp++ = NULL; + lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0]; + + /* + * perform opcode specific processing + */ + switch (op) { + case QUERY: + case NS_NOTIFY_OP: + if (ep - cp < QFIXEDSZ) + return -1; + + if ((n = dn_comp(dname, cp, ep - cp - QFIXEDSZ, dnptrs, lastdnptr)) < 0) + return -1; + + cp += n; + NS_PUT16(type, cp); + NS_PUT16(class, cp); + hp->qdcount = htons(1); + + if (op == QUERY || data == NULL) + break; + + /* + * Make an additional record for completion domain. + */ + if ((ep - cp) < RRFIXEDSZ) + return -1; + + n = dn_comp((const char *)data, cp, ep - cp - RRFIXEDSZ, + dnptrs, lastdnptr); + if (n < 0) + return -1; + + cp += n; + NS_PUT16(T_NULL, cp); + NS_PUT16(class, cp); + NS_PUT32(0, cp); + NS_PUT16(0, cp); + hp->arcount = htons(1); + + break; + + case IQUERY: + /* + * Initialize answer section + */ + if (ep - cp < 1 + RRFIXEDSZ + datalen) + return -1; + + *cp++ = '\0'; /*%< no domain name */ + NS_PUT16(type, cp); + NS_PUT16(class, cp); + NS_PUT32(0, cp); + NS_PUT16(datalen, cp); + + if (datalen) { + memcpy(cp, data, (size_t)datalen); + cp += datalen; + } + + hp->ancount = htons(1); + break; + + default: + return -1; + } + + return cp - buf; +} +#endif /* L_res_data */ + /* Unimplemented: */ -/* res_mkquery */ /* res_send */ |