--- /dev/null
+/*
+ */
+/*
+ * adns lookup TYPE DOMAIN [QUERY-OPTIONS] => [list RDATA]
+ * if no or dontknow, throws an exception, with errorCode one of
+ * ADNS NO 300 nxdomain {No such domain}
+ * ADNS NO 301 nodata {No such data}
+ * ADNS FAILED ERROR-CODE ERROR-NAME ERROR-STRING
+ * where
+ * ERROR-CODE is the numerical adns status value
+ * ERROR-NAME is the symbolic adns status value (in lowercase)
+ * ERROR-STRING is the result of adns_strstatus
+ *
+ * adns synch TYPE DOMAIN [QUERY-OPTIONS] => RESULTS
+ * RESULTS is [list ok|permfail|tempfail
+ * ERROR-CODE ERROR-NAME ERROR-STRING \
+ * OWNER CNAME \
+ * [list RDATA ...]]
+ * OWNER is the RR owner
+ * CNAME is the empty string or the canonical name if we went
+ * via a CNAME
+ *
+ * adns asynch ON-YES ON-NO ON-DONTKNOW XARGS \
+ * TYPE DOMAIN \
+ * [QUERY-OPTIONS] => QUERY-ID
+ * calls, later,
+ * [concat ON-YES|ON-NO|ON-DONTKNOW XARGS RESULTS]
+ * adns asynch-cancel QUERY-ID
+ *
+ * QUERY-OPTIONS are zero or more of
+ * -resolver RESOLVER (see adns new-resolver)
+ * default is to use a default resolver
+ * -search
+ * -usevc
+ * -quoteok-query
+ * -quoteok-anshost
+ * -quotefail-cname
+ * -cname-loose
+ * -cname-forbid
+ *
+ * adns new-resolver [RES-OPTIONS...] => RESOLVER
+ * options:
+ * -errfile stdout|stderr (stderr is the default)
+ * -noerrprint
+ * -errcallback CALLBACK results in eval CALLBACK [list MESSAGE]
+ * -noenv|-debug|-logpid
+ * -checkc-entex
+ * -checkc-freq
+ * -reverse
+ * -reverse-any ZONE-A-LIKE
+ * -config CONFIG-STRING
+ *
+ * adns destroy-resolver RESOLVER
+ */
+
+#include "tables.h"
+#include "hbytes.h"
+
+IdDataTable adnstcl_resolvers= { "adns-res" };
+IdDataTable adnstcl_queries= { "adns-q" };
+
+typedef struct {
+ int ix; /* first! */
+ Tcl_Interp *interp; fixme what about interpreter deletion
+ adns_state *ads;
+ int maxfd;
+ fd_set handling[3];
+} Resolver;
+
+typedef struct {
+ int ix; /* first! */
+ adns_query *aqu;
+ Tcl_Obj *on_yes, *on_no, *on_fail, *xargs;
+} Query;
+
+static adns_state *adnstcl_default;
+static int default_auto;
+
+#define RRTYPE_EXACTLY(t) { #t, adns_r_##t }
+#define RRTYPE_RAW(t) { #t, adns_r_##t##_raw }
+#define RRTYPE_PLUS(t) { #t "+", adns_r_##t }
+#define RRTYPE_MINUS(t) { #t "-", adns_r_##t##_raw }
+
+const AdnsTclRRTypeInfo adnstclrrtypeinfos[]= {
+ RRTYPE_EXACTLY(a),
+ RRTYPE_EXACTLY(cname),
+ RRTYPE_EXACTLY(hinfo),
+ RRTYPE_EXACTLY(addr),
+
+ RRTYPE_RAW(ns),
+ RRTYPE_RAW(mx),
+
+ RRTYPE_EXACTLY(soa),
+ RRTYPE_EXACTLY(ptr),
+ RRTYPE_EXACTLY(rp),
+
+ RRTYPE_MINUS(soa),
+ RRTYPE_MINUS(ptr),
+ RRTYPE_MINUS(rp),
+ { 0 }
+};
+
+typedef struct {
+ /* this struct type is used to hold both resolver and query options */
+ /* common to resolver and query: */
+ unsigned long *aflags;
+ unsigned long *sflags;
+ /* resolver: */
+ FILE *errfile;
+ Tcl_Obj *errcallback;
+ const char *config_string;
+ /* query: */
+ adns_state *resolver;
+ const char *reverseany;
+} OptionParse;
+
+typedef struct OptionInfo OptionInfo;
+struct OptionInfo {
+ const char *name;
+ int (*fn)(Tcl_Interp *ip, const OptionInfo *oi, Tcl_Obj *arg,
+ OptionParse *op);
+ int takesarg;
+ unsigned long flags_add, flags_remove;
+};
+
+enum {
+ oisf_makedefault= 0x0001,
+ oisf_reverse= 0x0002
+};
+
+static int oiufn_f(const OptionInfo *oi, unsigned long *flags) {
+ flags &= ~oi->flags_remove;
+ flags |= oi->flsgs_add;
+}
+static int oifn_fa(Tcl_Interp *ip, const OptionInfo *oi, Tcl_Obj *arg,
+ OptionParse *op) { oiufn_f(oi,op->aflags); }
+static int oifn_fs(Tcl_Interp *ip, const OptionInfo *oi, Tcl_Obj *arg,
+ OptionParse *op) { oiufn_f(oi,op->sflags); }
+
+static int oifn_errfile(Tcl_Interp *ip, const OptionInfo *oi,
+ Tcl_Obj *arg, OptionParse *op) {
+ int rc;
+ const char *str;
+
+ rc= pat_string(ip,arg,&str); if (rc) return rc;
+ if (!strcmp(str,"stderr")) op.errfile= stderr;
+ else if (!strcmp(str,"stdout")) op.errfile= stdout;
+ else return staticerr(ip,"-errfile argument must be stderr or stdout",0);
+
+ op.aflags &= ~adns_if_noerrprint;
+ op.errcallback= 0;
+ return TCL_OK;
+}
+
+static int oifn_errcallback(Tcl_Interp *ip, const OptionInfo *oi,
+ Tcl_Obj *arg, OptionParse *op) {
+ op.errcallback= arg;
+ op.aflags &= ~adns_if_noeerpring;
+ op.errfile= 0;
+ return TCL_OK;
+}
+
+static int oifn_config(Tcl_Interp *ip, const OptionInfo *oi,
+ Tcl_Obj *arg, OptionParse *op) {
+ return pat_string(ip,arg,&op.config_string);
+}
+
+static int oifn_resolver(Tcl_Interp *ip, const OptionInfo *oi,
+ Tcl_Obj *arg, OptionParse *op) {
+ void *val_v;
+ rc= pat_iddata(ip,arg,&val_v,adnstcl_resolvers);
+ if (rc) return rc;
+ op.resolver= val_v;
+}
+
+static int oifn_reverse_any(Tcl_Interp *ip, const OptionInfo *oi,
+ Tcl_Obj *arg, OptionParse *op) {
+ return pat_string(ip,arg,&op.reverseany);
+}
+
+#define OIFA1(t,f,r) { "-" #f, oifn_fa, 0, adns_##t##_##f, r }
+#define OIFA2(t,f,g) { "-" #f "-" #g, oifn_fa, 0, adns_##t##_##f##_##g, 0 }
+#define OIFS(f) { "-" #f, oifn_fs, 0, oisf_##f, 0 }
+#define OICA(o) { "-" #o, oifn_##o, 1 }
+
+static const OptionInfo resolver_optioninfos[]= {
+ OIFA1(if,noenv, 0),
+ OIFA1(if,debug, adns_if_noerrprint),
+ OIFA1(if,logpid, adns_if_noerrprint),
+ OIFA1(if,noerrprint, adns_if_debug),
+ OIFA2(if,checkc,entex),
+ OIFA2(if,checkc,freq),
+ OIFS(makedefault),
+ OICA(errprint),
+ OICA(errcallback),
+ OICA(config),
+ { 0 }
+};
+
+static const OptionInfo query_optioninfos[]= {
+ OIFA1(if,search,0),
+ OIFA1(if,usevc,0),
+ OIFA2(if,quoteok,query),
+ OIFA2(if,quoteok,anshost),
+ OIFA2(if,quotefail,cname),
+ OIFA2(if,cname,loose),
+ OIFA2(if,cname,forbid),
+ OICA(resolver),
+ OIFS(reverse),
+ { "-reverse-any", oifn_reverse_any, 1 },
+ { 0 }
+};
+
+static int parse_options(Tcl_Interp *ip, int objc, Tcl_Obj *const *objv,
+ const OptionInfo opttable[], OptionParse *op) {
+ const OptionInfo *oi;
+ Tcl_Obj *arg;
+
+ for (;;) {
+ if (!objc--) break;
+
+ rc= pat_enum(ip,*objv++, &oi,opttable, sizeof(OptionInfo));
+ if (rc) return rc;
+
+ if (oi->takesarg) {
+ if (!objc--) {
+ setstringresult(ip,"missing value for option");
+ return TCL_ERROR;
+ }
+ arg= *objv++;
+ } else {
+ arg= 0;
+ }
+ rc= oi->fn(ip,oi,arg,op);
+ if (rc) return rc;
+ }
+ return TCL_OK;
+}
+
+int do_adns_destroy_resolver(ClientData cd, Tcl_Interp *ip, void *res_v) {
+ adns_state *res= res_v;
+
+ if (res == adnstcl_default) {
+ adnstcl_default= 0;
+ default_auto= 0;
+ }
+ adns_finish(res); fixme what about outstanding qs
+ return TCL_OK;
+}
+
+static void asynch_check(Resolver *res);
+
+static void asynch_timerhandler(void *res_v) {
+ Resolver *res= res_v;
+ res->timertoken= 0;
+ adns_processtimeouts(res->ads,0);
+ checkqueries_updatehandlers(res);
+}
+
+static void asynch_filehandler(void *res_v, int mask) {
+ Resolver *res= res_v;
+ ec= adns_processany(res->ads);
+ if (ec) adns_globalsystemfailure(res->ads);
+ checkqueries_updatehandlers(res);
+}
+
+static void asynch_sethandlers(Resolver *res, int shutdown) {
+ fd_set want[3];
+ int maxfd;
+ struct timeval tvbuf, *timeout;
+
+ for (i=0; i<3; i++) FD_ZERO(&want[i]);
+ maxfd= 0;
+ timeout= 0;
+
+ if (!shutdown)
+ adns_beforeselect(res->ads,&maxfd,&want[0],&want[1],&want[2],
+ &timeout,&tv_buf,0);
+
+ for (fd= 0; fd < maxfd || fd < res->maxfd; fd++)
+ for (i=0; i<3; i++)
+ if (!!FD_ISSET(fd, &res->handling[i])
+ != !!FD_ISSET(fd, &want[i])) {
+ int mask=0;
+ if (FD->ISSET(fd, &want[0])) mask |= TCL_READABLE;
+ if (FD->ISSET(fd, &want[1])) mask |= TCL_WRITABLE;
+ if (FD->ISSET(fd, &want[2])) mask |= TCL_EXCEPTION;
+ if (mask) Tcl_CreateFileHandler(fd,mask,filehandler,res);
+ else Tcl_DeleteFileHandler(fd);
+ }
+
+ Tcl_DeleteTimerHandler(res->timertoken);
+
+ if (timeout) {
+ int milliseconds;
+
+ if (timeout->tv_sec >= INT_MAX/1000 - 1)
+ milliseconds= INT_MAX;
+ else
+ milliseconds= timeout->tv_sec * 1000 +
+ (timeout->tv_usec + 999) / 1000;
+
+ res->timertoken= Tcl_CreateTimerHandler(milliseconds,timerhandler,res);
+ }
+}
+
+int do_adns_new_resolver(ClientData cd, Tcl_Interp *ip,
+ int objc, Tcl_Obj *const *objv,
+ void **result) {
+ OptionParse op;
+ adns_state *ads=0;
+ Resolver *res=0;
+
+ op.aflags= adns_if_noautosys;
+ op.sflags= 0;
+ op.errfile= 0;
+ op.errcallback= 0;
+ op.config_string= 0;
+ rc= parse_options(ip,objc,objv,resolver_optioninfos,&op);
+ if (rc) goto x_rc;
+
+ res= TALLOC(sizeof(*res)); assert(res);
+ res->maxfd= 0;
+ for (i=0; i<3; i++) FD_ZERO(&res->handling);
+ res->interp= ip;
+
+ if (op.aflags & adns_if_noerrprint) {
+ op.errfile= 0;
+ op.errcallback= 0;
+ }
+
+ ec= adns_init_logfn(&ads, op.aflags, op.configstring,
+ op.errcallback ? adnslogfn_callback : 0,
+ op.errcallback ? op.errcallback : op.errfile);
+ if (ec) { rc= posixerr(ip,ec,"create adns resolver"); goto x_rc; }
+ res->ads= ads;
+
+ if (op.errcallback)
+ Tcl_IncrRefCount(op.errcallback);
+
+ rc= update_handlers(&res); if (rc) goto x_rc;
+
+ *result= res;
+ return TCL_OK;
+}
+
+static int query_submit(Tcl_Interp *ip, int objc, Tcl_Obj *const *objv,
+ const char *domain) {
+ struct sockaddr sa;
+ static const int aftry[]= { AF_INET, AF_INET6 };
+
+ op.aflags= adns_qf_owner;
+ op.sflags= 0;
+ op.resolver= 0;
+ rc= parse_options(ip,objc,objv,query_optioninfos,&op);
+ if (rc) return rc;
+
+ if (op.reverseany || (op.sflags & oisf_reverse)) {
+ const int *af;
+ for (af=aftry; af < af + sizeof(af)/sizeof(*af); af++) {
+ memset(&sa,0,sizeof(sa));
+ sa.sa_family= *af;
+ r= inet_pton(*af,domain,&sa);
+ if (!r) goto af_found;
+ }
+ return staticerr(ip,ec,"invalid address for adns reverse submit","");
+ }
+
+ if (!op.resolver) {
+ if (!adnstcl_default) {
+ ec= adns_init(&adnstcl_default,adns_if_noautosys,0);
+ if (ec) return posixerr(ip,ec,"create default adns resolver");
+ }
+ default_auto= 1;
+ op.resolver= adnstcl_default;
+ }
+
+ if (op.reverseany) {
+ ec= adns_submit_reverse_any(op.resolver, &sa, op.reverseany, rrtype,
+ op.aflags, 0, &query);
+ } else if (op.sflags & oisf_reverse) {
+ ec= adns_submit_reverse(op.resolver, &sa, rrtype, op.aflags, 0, &query);
+ } else {
+ ec= adns_submit(op.resolver, domain, rrtype, op.aflags, 0, &query);
+ }
+ if (ec)
+ return posixerr(ip,ec,"submit adns query");
+
+ return TCL_OK;
+}
+
+int do_adns_lookup(ClientData cd, Tcl_Interp *ip,
+ const AdnsTclRRTypeInfo *rrtype,
+ const char *domain,
+ int objc, Tcl_Obj *const *objv,
+ Tcl_Obj **result) {
+ OptionParse op;
+
+ rc= query_submit(ip,domain,objc,objv,&op, ); if (rc) return rc;
+
+ ec= adns_wait(op.resolver,&query,&answer,0);
+ if (ec) return posixerr(ip,ec,"wait for adns lookup");
+
+ ...;
+}
+
+#define RESULTS_LLEN 7
+static void make_results(Tcl_Interp *ip, adns_answer *answer,
+ Tcl_Obj results[RESULTS_LLEN]) {
+ Tcl_Obj *rdata;
+
+ results[0]= ret_string(ip, adns_errtypeabbrev(answer->status));
+ results[1]= ret_int(ip, answer->status);
+ results[2]= ret_string(ip, adns_errabbrev(answer->status));
+ results[3]= ret_string(ip, adns_strstatus(answer->status));
+ results[4]= ret_string(ip, answer->owner);
+ results[5]= ret_string(ip, answer->cname ? answer->cname : "");
+
+ rdata= TALLOC(sizeof(*rdata) * answer->nrrs);
+ for (i=0, datap=answer->rrs.untyped;
+ i<answer->nrrs; i++, datap += rrsz) {
+ st= adns_rr_info(answer->type, 0,0, &rrsz, datap, &rdatastring);
+ assert(!st);
+ rdata[i]= ret_string(ip, rdatastring);
+ free(rdatastring);
+ }
+ results[6]= Tcl_NewListObj(RESULTS_LLEN,rdata);
+ TFREE(rdata);
+}
+
+static void asynch_query_dispose(Query *query) {
+ scriptinv_cancel(&query->on_yes);
+ scriptinv_cancel(&query->on_no);
+ scriptinv_cancel(&query->on_fail);
+ if (query->xargs) Tcl_DecrRefCount(query->xargs);
+ if (query->aqu) adns_cancel(query->aqu);
+ TFREE(query);
+}
+
+static void asynch_check(Resolver *res) {
+ Tcl_Interp *interp= res->interp;
+ adns_query *aqu;
+ adns_answer *answer;
+ Query *qu;
+ ScriptToInvoke *si;
+ Tcl_Obj results[RESULTS_LLEN];
+
+ for (;;) {
+ ec= adns_check(res->ads, &aqu, &answer, &qu);
+ if (ec==ESRCH || ec==EAGAIN) break;
+ assert(!ec);
+
+ qu->aqu= 0;
+
+ si= (!answer->status ? si= &query->on_yes
+ : answer->status > adns_s_max_tempfail ? &query->on_no
+ : &query->on_fail);
+
+ adnstcl_queries[qu->ix].a= 0;
+ make_results(ip, answer, results);
+ scriptinv_invoke(si, RESULTS_LLEN, results);
+ asynch_query_dispose(query);
+ }
+
+ asynch_sethandlers(res,0);
+}
+
+int do_adns_asynch(ClientData cd, Tcl_Interp *ip,
+ const AdnsTclRRTypeInfo *rrtype, const char *domain,
+ Tcl_Obj *on_yes, Tcl_Obj *on_no,
+ Tcl_Obj *on_fail, Tcl_Obj *xargs,
+ int objc, Tcl_Obj *const *objv, void **result) {
+ Query *query;
+ adns_query *aqu;
+
+ query= TALLOC(sizeof(*query));
+ query->aqu= 0;
+ scriptinv_init(&query->on_yes);
+ scriptinv_init(&query->on_no);
+ scriptinv_init(&query->on_fail);
+ query->xargs= 0;
+
+ rc= query_submit(ip,rrtype,domain, ...); if (rc) goto x_rc;
+ query->aqu= aqu;
+
+ rc= scriptinv_set(&query->on_yes, ip,on_yes); if (rc) goto x_rc;
+ rc= scriptinv_set(&query->on_no, ip,on_no); if (rc) goto x_rc;
+ rc= scriptinv_set(&query->on_fail,ip,on_fail); if (rc) goto x_rc;
+ query->xargs= xargs;
+ Tcl_IncrRefCount(xargs);
+ *result= query;
+
+ return TCL_OK;
+
+ x_rc:
+ asynch_cancel(query);
+ return rc;
+}
+
+int do_adns_asynch_cancel(ClientData cd, Tcl_Interp *ip, void *query_v) {
+ adns_query *qu;
+
+}
+
+int do_adns_synch(ClientData cd, Tcl_Interp *ip, const AdnsTclRRTypeInfo *rrtype, const char *domain, int objc, Tcl_Obj *const *objv, adns_answer **result);
~ian / chiark-tcl.git / commitdiff