const struct sockaddr *sockaddr_addr(const SockAddr_Value*);
void sockaddr_free(const SockAddr_Value*);
+/* from idtable.c */
+
+typedef struct {
+ const char *const prefix;
+ int n;
+ void **a;
+} IdDataTable;
+
+extern Tcl_ObjType tabledataid_nearlytype;
+int tabledataid_parse(Tcl_Interp *ip, Tcl_Obj *o, IdDataTable *tab);
+
/* from dgram.c */
-extern Tcl_ObjType dgramsockid_type;
-typedef struct DgramSocket *DgramSockID;
+extern IdDataTable dgram_socks;
+int newfdposixerr(Tcl_Interp *ip, int fd, const char *m);
+
+/* from tuntap.c */
+
+extern IdDataTable tuntap_socks;
/* from hook.c */
return TCL_ERROR;
}
+int newfdposixerr(Tcl_Interp *ip, int fd, const char *m) {
+ int e;
+ e= errno;
+ close(fd);
+ return posixerr(ip,e,m);
+}
+
void objfreeir(Tcl_Obj *o) {
if (o->typePtr && o->typePtr->freeIntRepProc)
o->typePtr->freeIntRepProc(o);
return subcmd->func(0,ip,objc,objv);
}
+int do_toplevel_tuntap_socket(ClientData cd, Tcl_Interp *ip,
+ const TunSocket_SubCommand *subcmd,
+ int objc, Tcl_Obj *const *objv) {
+ return subcmd->func(0,ip,objc,objv);
+}
+
int do_toplevel_ulong(ClientData cd, Tcl_Interp *ip,
const ULong_SubCommand *subcmd,
int objc, Tcl_Obj *const *objv) {
Tcl_RegisterObjType(&enum_nearlytype);
Tcl_RegisterObjType(&enum1_nearlytype);
Tcl_RegisterObjType(&sockaddr_type);
- Tcl_RegisterObjType(&dgramsockid_type);
+ Tcl_RegisterObjType(&tabledataid_nearlytype);
Tcl_RegisterObjType(&ulong_type);
for (cmd=toplevel_commands;
--- /dev/null
+/*
+ */
+/*
+ * dgram-socket create <local> => <sockid>
+ * dgram-socket close <sockid>
+ * dgram-socket transmit <sockid> <data> <remote>
+ * dgram-socket on-receive <sockid> [<script>]
+ * calls, effectively, eval <script> [list <data> <remote-addr> <socket>]
+ * if script not supplied, cancel
+ */
+
+#include "tables.h"
+#include "hbytes.h"
+
+/* Arg parsing */
+
+static void setobjdataid(Tcl_Obj *o, int ix, IdDataTable *tab) {
+ unsigned long *ulp;
+
+ ulp= TALLOC(sizeof(unsigned long));
+ *ulp= ix;
+ o->internalRep.twoPtrValue.ptr1= tab;
+ o->internalRep.twoPtrValue.ptr2= ulp;
+ o->typePtr= &tabledataid_nearlytype;
+}
+
+int tabledataid_parse(Tcl_Interp *ip, Tcl_Obj *o, IdDataTable *tab) {
+ int l;
+ unsigned long ul;
+ char *ep, *str;
+
+ if (o->typePtr == &tabledataid_nearlytype &&
+ o->internalRep.twoPtrValue.ptr1 == tab) return TCL_OK;
+
+ l= strlen(tab->prefix);
+ str= Tcl_GetStringFromObj(o,0);
+ if (memcmp(str,tab->prefix,l))
+ return staticerr(ip,"bad id (wrong prefix)",0);
+ errno=0; ul=strtoul(str+l,&ep,10);
+ if (errno || *ep) return staticerr(ip,"bad id number",0);
+ if (ul > INT_MAX) return staticerr(ip,"out of range id number",0);
+
+ objfreeir(o);
+ setobjdataid(o,ul,tab);
+ return TCL_OK;
+}
+
+int pat_iddata(Tcl_Interp *ip, Tcl_Obj *o, void **rv, IdDataTable *tab) {
+ int rc, ix;
+ void *r;
+
+ rc= tabledataid_parse(ip,o,tab);
+ if (rc) return rc;
+
+ ix= *(unsigned long*)o->internalRep.twoPtrValue.ptr2;
+ if (ix >= tab->n || !(r= tab->a[ix]))
+ return staticerr(ip,"id not in use",0);
+
+ assert(*(int*)r == ix);
+
+ *rv= r;
+ return TCL_OK;
+}
+
+Tcl_Obj *ret_iddata(Tcl_Interp *ip, void *val, IdDataTable *tab) {
+ /* Command procedure implementation may set val->ix,
+ * ie *(int*)val, to -1, to mean it's a new struct. Otherwise
+ * it had better be an old one !
+ */
+ Tcl_Obj *o;
+ int ix;
+
+ ix= *(int*)val;
+ if (ix==-1) {
+ for (ix=0; ix<tab->n && tab->a[ix]; ix++);
+ if (ix>=tab->n) {
+ tab->n += 2;
+ tab->n *= 2;
+ tab->a= (void*)Tcl_Realloc((void*)tab->a, tab->n*sizeof(*tab->a));
+ while (ix<tab->n) tab->a[ix++]=0;
+ ix--;
+ }
+ tab->a[ix]= val;
+ *(int*)val= ix;
+ } else {
+ assert(val == tab->a[ix]);
+ }
+
+ o= Tcl_NewObj();
+ setobjdataid(o,ix,tab);
+ Tcl_InvalidateStringRep(o);
+ return o;
+}
+
+static int tabledataid_nt_sfa(Tcl_Interp *ip, Tcl_Obj *o) {
+ abort();
+}
+
+static void tabledataid_nt_free(Tcl_Obj *o) {
+ TFREE(o->internalRep.twoPtrValue.ptr2);
+ o->internalRep.twoPtrValue.ptr2= 0;
+}
+
+static void tabledataid_nt_dup(Tcl_Obj *src, Tcl_Obj *dup) {
+ setobjdataid(dup,*(unsigned long*)src->internalRep.twoPtrValue.ptr2,
+ src->internalRep.twoPtrValue.ptr1);
+}
+
+static void tabledataid_nt_ustr(Tcl_Obj *o) {
+ char buf[75];
+ const char *prefix;
+
+ prefix= o->internalRep.twoPtrValue.ptr2;
+ snprintf(buf,sizeof(buf), "%lu",
+ *(unsigned long*)o->internalRep.twoPtrValue.ptr2);
+ obj_updatestr_vstringls(o,
+ prefix, strlen(prefix),
+ buf, strlen(buf),
+ (char*)0);
+}
+
+Tcl_ObjType tabledataid_ntype = {
+ "tabledataid",
+ tabledataid_nt_free, tabledataid_nt_dup,
+ tabledataid_nt_ustr, tabledataid_nt_sfa
+};
Type sockaddr: SockAddr_Value @
Init sockaddr sockaddr_clear(&@);
-Type sockid: DgramSockID @
+Type iddata(IdDataTable *tab): void *@
Type ulong: uint32_t @
Type long: long @
+Type string: const char *@
H-Include "hbytes.h"
dgram-socket
subcmd enum(DgramSocket_SubCommand,"dgram-socket subcommand")
... obj
+ tuntap-socket
+ subcmd enum(TunSocket_SubCommand,"tuntap-socket subcommand")
+ ... obj
ulong
subcmd enum(ULong_SubCommand,"ulong subcommand")
... obj
Table dgram_socket DgramSocket_SubCommand
create
local sockaddr
- => sockid
+ => iddata(&dgram_socks)
close
- sock sockid
+ sock iddata(&dgram_socks)
transmit
- sock sockid
+ sock iddata(&dgram_socks)
data hb
remote sockaddr
on-receive
- sock sockid
+ sock iddata(&dgram_socks)
+ ?script obj
+
+Table tuntap_socket TunSocket_SubCommand
+ create-ptp
+ local sockaddr
+ peer sockaddr
+ mtu long
+ ?ifname string
+ => iddata(&tuntap_socks)
+ close
+ sock iddata(&tuntap_socks)
+ ifname
+ sock iddata(&tuntap_socks)
+ => string
+ receive
+ sock iddata(&tuntap_socks)
+ data hb
+ on-transmit
+ sock iddata(&tuntap_socks)
?script obj
Table blockcipherop BlockCipherOp
} elsif (@i==2 && m/^(\??)([a-z]\w*)\s*(\S.*)/
&& defined $c_entry) {
($opt, $var, $type) = ($1,$2,$3);
- if ($type =~ m/^\w+$/) {
- $xtypeargs='';
- } elsif ($type =~ m/^(\w+)\((.+)\)$/) {
- $type= $1;
- $xtypeargs= $2;
- }
+ ($type, $xtypeargs) = split_type_args($type);
push @{ $tables{$c_table}{$c_entry}{A} },
{ N => $var, T => $type, A => $xtypeargs, O => ($opt eq '?') };
} elsif (@i==2 && m/^\=\>\s*(\S.*)$/ && defined $c_entry) {
- $tables{$c_table}{$c_entry}{R}= $1;
+ ($type, $xtypeargs) = split_type_args($1);
+ $tables{$c_table}{$c_entry}{R}= $type;
+ $tables{$c_table}{$c_entry}{X}= $xtypeargs;
} elsif (@i==0 && m/^Type\s+([^\:]+)\:\s+(\S.*)$/) {
($typename,$ctype)= ($1,$2);
$ctype .= ' @' unless $ctype =~ m/\@/;
- if ($typename =~ m/^\w+$/) {
- $xtypeargs='';
- } elsif ($typename =~ m/^(\w+)\((.+)\)$/) {
- $typename=$1;
- $xtypeargs=$2;
- } else {
- badsyntax($wh,$.,"bad type name/args");
- }
+ ($typename,$xtypeargs) = split_type_args($typename);
$types{$typename}= { C => $ctype, X => $xtypeargs };
} elsif (@i==0 && s/^Init\s+(\w+)\s+(\S.*)//) {
$type_init{$1}= $2;
$decl .= ");\n";
o('h',160, $decl);
- $decl= "Tcl_Obj *ret_$t(Tcl_Interp *ip, ".subst_in_decl('val',$c).");\n";
+ $decl= "Tcl_Obj *ret_$t(Tcl_Interp *ip, ".subst_in_decl('val',$c);
+ $decl .= ", $xta" if length $xta;
+ $decl .= ");\n";
o('h',170, $decl);
}
$n= $arg->{N};
$t= $arg->{T};
$a= $arg->{A};
- push @do_al, make_decl($n, $t, $arg->{A});
- $pa_vars .= make_decl_init("a_$n", $t, $a, \$pa_init);
+ push @do_al, make_decl($n, $t, $arg->{A},
+ "table $c_table entry $c_entry arg $n");
+ $pa_vars .= make_decl_init("a_$n", $t, $a, \$pa_init, "pa_vars");
if ($arg->{O}) {
$pa_hint .= " ?$n?";
if ($any_mand) {
}
if (exists $r_entry->{R}) {
$t= $r_entry->{R};
- push @do_al, make_decl("*result", $t);
- $pa_vars .= make_decl_init("result", $t, '', \$pa_init);
+ $xta= $r_entry->{X};
+ push @do_al, make_decl("*result", $t, "do_al result");
+ $pa_vars .= make_decl_init("result", $t, $xta, \$pa_init,
+ "pa_vars result");
push @do_aa, "&result";
- $pa_rslt .= " Tcl_SetObjResult(ip, ret_$t(ip, result));\n";
+ $pa_rslt .= " Tcl_SetObjResult(ip, ret_$t(ip, result";
+ $pa_rslt .= ", $xta" if length $xta;
+ $pa_rslt .= "));\n";
}
$pa_body .= "\n";
$pa_body .= " rc= do_${c_table}_${c_entry_c}(";
$o{$wh}{sprintf "%010d", $pr} .= $s;
}
-sub make_decl_init ($$$$) {
- my ($n, $t, $a, $initcode) = @_;
+sub split_type_args ($) {
+ my ($type) = @_;
+ my ($xtypeargs);
+ if ($type =~ m/^\w+$/) {
+ $xtypeargs='';
+ } elsif ($type =~ m/^(\w+)\((.+)\)$/) {
+ $type= $1;
+ $xtypeargs= $2;
+ } else {
+ badsyntax($wh,$.,"bad type name/args \`$type'\n");
+ }
+ return ($type,$xtypeargs);
+}
+
+sub make_decl_init ($$$$$) {
+ my ($n, $t, $a, $initcode, $why) = @_;
my ($o,$init);
- $o= make_decl($n,$t,$a);
+ $o= make_decl($n,$t,$a,"$why _init");
if (exists $type_init{$t}) {
$init= $type_init{$t};
$$initcode .= " ".subst_in("$n", $init)."\n"
return " ".$o.";\n";
}
-sub make_decl ($$$) {
- my ($n, $t, $ta) = @_;
+sub make_decl ($$$$) {
+ my ($n, $t, $ta, $why) = @_;
my ($type);
if ($t eq 'enum') {
- $ta =~ m/\,/ or die "invalid enum type \`$t'\n";
+ $ta =~ m/\,/ or die "invalid enum type \`$t' ($why)\n";
$c= "const $` *@";
} else {
- defined $types{$t} or die "unknown type $t\n";
+ defined $types{$t} or die "unknown type $t ($why)\n";
$c= $types{$t}{C};
}
return subst_in_decl($n,$c);
OBJS= tables.o \
hbytes.o \
enum.o \
+ idtable.o \
ulongs.o \
sockaddr.o \
dgram.o \
#include "hbytes.h"
typedef struct DgramSocket {
- int ix, fd, script_llength;
+ int ix; /* first ! */
+ int fd, script_llength;
Tcl_Interp *ip;
Tcl_Obj *script;
void *addr_buf, *msg_buf;
int addr_buflen, msg_buflen;
} DgramSocket;
-static int n_socks;
-static DgramSocket **socks;
-
-static int sockfail(Tcl_Interp *ip, int fd, const char *m) {
- int e;
- e= errno;
- close(fd);
- return posixerr(ip,e,m);
-}
+IdDataTable dgram_socks= { "dgramsock" };
int do_dgram_socket_create(ClientData cd, Tcl_Interp *ip,
- SockAddr_Value local, DgramSockID *sock_r) {
- int fd, al, r, sockix;
+ SockAddr_Value local, void **sock_r) {
+ int fd, al, r;
DgramSocket *sock;
const struct sockaddr *sa;
- for (sockix=0; sockix<n_socks && socks[sockix]; sockix++);
- if (sockix>=n_socks) {
- n_socks += 2;
- n_socks *= 2;
- socks= (void*)Tcl_Realloc((void*)socks, n_socks*sizeof(*socks));
- while (sockix<n_socks) socks[sockix++]=0;
- sockix--;
- }
-
sa= sockaddr_addr(&local);
al= sockaddr_len(&local);
fd= socket(sa->sa_family, SOCK_DGRAM, 0);
if (fd<0) return posixerr(ip,errno,"socket");
- r= bind(fd, sa, al); if (r) return sockfail(ip,fd,"bind");
- r= setnonblock(fd, 1); if (r) return sockfail(ip,fd,"setnonblock");
+ r= bind(fd, sa, al); if (r) return newfdposixerr(ip,fd,"bind");
+ r= setnonblock(fd, 1); if (r) return newfdposixerr(ip,fd,"setnonblock");
- socks[sockix]= sock= TALLOC(sizeof(DgramSocket));
+ sock= TALLOC(sizeof(DgramSocket));
+ sock->ix= -1;
sock->fd= fd;
- sock->ix= sockix;
sock->script= 0;
sock->addr_buflen= al+1;
sock->addr_buf= TALLOC(sock->addr_buflen);
}
int do_dgram_socket_transmit(ClientData cd, Tcl_Interp *ip,
- DgramSocket *sock, HBytes_Value data,
+ void *sock_v, HBytes_Value data,
SockAddr_Value remote) {
+ DgramSocket *sock= sock_v;
int l, r;
r= sendto(sock->fd,
args[0]= ret_hb(ip, message_val); hbytes_empty(&message_val);
args[1]= ret_sockaddr(ip, peer_val); sockaddr_clear(&peer_val);
- args[2]= ret_sockid(ip, sock);
+ args[2]= ret_iddata(ip, sock, &dgram_socks);
for (i=0; i<3; i++) Tcl_IncrRefCount(args[i]);
invoke= Tcl_DuplicateObj(sock->script);
}
int do_dgram_socket_on_receive(ClientData cd, Tcl_Interp *ip,
- DgramSocket *sock, Tcl_Obj *script) {
+ void *sock_v, Tcl_Obj *script) {
+ DgramSocket *sock= sock_v;
int rc;
if (script) {
return TCL_OK;
}
-int do_dgram_socket_close(ClientData cd, Tcl_Interp *ip, DgramSocket *sock) {
+int do_dgram_socket_close(ClientData cd, Tcl_Interp *ip, void *sock_v) {
+ DgramSocket *sock= sock_v;
int sockix;
cancel(sock);
close(sock->fd); /* nothing useful to be done with errors */
TFREE(sock->addr_buf);
TFREE(sock->msg_buf);
TFREE(sock);
- socks[sockix]= 0;
- return TCL_OK;
-}
-
-/* Arg parsing */
-
-int pat_sockid(Tcl_Interp *ip, Tcl_Obj *o, DgramSocket **val) {
- int rc, sockix;
- DgramSocket *sock;
-
- rc= Tcl_ConvertToType(ip,o,&dgramsockid_type);
- if (rc) return rc;
-
- sockix= o->internalRep.longValue;
- if (sockix >= n_socks || !(sock= socks[sockix]))
- return staticerr(ip,"dgram socket not open",0);
-
- assert(socks[sockix]->ix == sockix);
-
- *val= sock;
- return TCL_OK;
-}
-
-Tcl_Obj *ret_sockid(Tcl_Interp *ip, DgramSocket *val) {
- Tcl_Obj *o;
-
- o= Tcl_NewObj();
- Tcl_InvalidateStringRep(o);
- o->internalRep.longValue= val->ix;
- o->typePtr= &dgramsockid_type;
- return o;
-}
-
-static void sockid_t_free(Tcl_Obj *o) { }
-
-static void sockid_t_dup(Tcl_Obj *src, Tcl_Obj *dup) {
- dup->internalRep= src->internalRep;
- dup->typePtr= &dgramsockid_type;
-}
-
-static void sockid_t_ustr(Tcl_Obj *o) {
- char buf[75];
-
- snprintf(buf,sizeof(buf), "%d", (int)o->internalRep.longValue);
- obj_updatestr_vstringls(o,
- "dgramsock",9,
- buf, strlen(buf),
- (char*)0);
-}
-
-static int sockid_t_sfa(Tcl_Interp *ip, Tcl_Obj *o) {
- unsigned long ul;
- char *ep, *str;
-
- str= Tcl_GetStringFromObj(o,0);
- if (memcmp(str,"dgramsock",9)) return staticerr(ip,"bad dgram socket id",0);
- errno=0; ul=strtoul(str+9,&ep,10);
- if (errno || *ep) return staticerr(ip,"bad dgram socket id number",0);
- if (ul > INT_MAX) return staticerr(ip,"out of range dgram socket id",0);
-
- objfreeir(o);
- o->internalRep.longValue= ul;
- o->typePtr= &dgramsockid_type;
+ dgram_socks.a[sockix]= 0;
return TCL_OK;
}
-
-Tcl_ObjType dgramsockid_type = {
- "dgramsockid",
- sockid_t_free, sockid_t_dup, sockid_t_ustr, sockid_t_sfa
-};
const struct sockaddr *sockaddr_addr(const SockAddr_Value*);
void sockaddr_free(const SockAddr_Value*);
+/* from idtable.c */
+
+typedef struct {
+ const char *const prefix;
+ int n;
+ void **a;
+} IdDataTable;
+
+extern Tcl_ObjType tabledataid_nearlytype;
+int tabledataid_parse(Tcl_Interp *ip, Tcl_Obj *o, IdDataTable *tab);
+
/* from dgram.c */
-extern Tcl_ObjType dgramsockid_type;
-typedef struct DgramSocket *DgramSockID;
+extern IdDataTable dgram_socks;
+int newfdposixerr(Tcl_Interp *ip, int fd, const char *m);
+
+/* from tuntap.c */
+
+extern IdDataTable tuntap_socks;
/* from hook.c */
return TCL_ERROR;
}
+int newfdposixerr(Tcl_Interp *ip, int fd, const char *m) {
+ int e;
+ e= errno;
+ close(fd);
+ return posixerr(ip,e,m);
+}
+
void objfreeir(Tcl_Obj *o) {
if (o->typePtr && o->typePtr->freeIntRepProc)
o->typePtr->freeIntRepProc(o);
return subcmd->func(0,ip,objc,objv);
}
+int do_toplevel_tuntap_socket(ClientData cd, Tcl_Interp *ip,
+ const TunSocket_SubCommand *subcmd,
+ int objc, Tcl_Obj *const *objv) {
+ return subcmd->func(0,ip,objc,objv);
+}
+
int do_toplevel_ulong(ClientData cd, Tcl_Interp *ip,
const ULong_SubCommand *subcmd,
int objc, Tcl_Obj *const *objv) {
Tcl_RegisterObjType(&enum_nearlytype);
Tcl_RegisterObjType(&enum1_nearlytype);
Tcl_RegisterObjType(&sockaddr_type);
- Tcl_RegisterObjType(&dgramsockid_type);
+ Tcl_RegisterObjType(&tabledataid_nearlytype);
Tcl_RegisterObjType(&ulong_type);
for (cmd=toplevel_commands;
--- /dev/null
+/*
+ */
+/*
+ * tuntap-socket create-ptp <local-addr> <peer-addr> <mtu> [<ifname>]
+ * => <sockid>
+ * tuntap-socket close <sockid>
+ * tuntap-socket ifname <sockid>
+ * tuntap-socket receive <sockid> <data>
+ * tuntap-socket on-transmit <sockid> [<script>]
+ * calls, effectively, eval <script> [list <data> <socket>]
+ * if script not supplied, cancel
+ */
+
+#include "tables.h"
+#include "hbytes.h"
+
+typedef struct TunSocket {
+ int ix, fd, script_llength;
+ Tcl_Interp *ip;
+ Tcl_Obj *script;
+ void msg_buf;
+ int mtu;
+ char *ifname;
+} TuntapSocket;
+
+IdDataTable tuntap_socks= { "tuntap" };
+
+static int sockfail(Tcl_Interp *ip, int fd, const char *m) {
+ int e;
+ e= errno;
+ close(fd);
+ return posixerr(ip,e,m);
+}
+
+int do_tuntap_socket_create_ptp(ClientData cd, Tcl_Interp *ip,
+ SockAddr_Value local, SockAddr_Value peer,
+ long mtu, const char *ifname,
+ void **sock_r) {
+ int fd, local_al, peer_al, r;
+ struct ifreq ifr;
+ DgramSocket *sock;
+ const struct sockaddr *local_sa, *peer_sa;
+
+ local_sa= sockaddr_addr(&local);
+ local_al= sockaddr_len(&local);
+
+ peer_sa= sockaddr_addr(&peer);
+ peer_al= sockaddr_len(&peer);
+
+ if (local_sa != AF_INET || local_al != sizeof(struct in_addr) ||
+ peer_sa != AF_INET || peer_al != sizeof(struct in_addr))
+ return staticerr(ip,"tuntap not IPv4");
+
+ memset(&ifr,0,sizeof(ifr));
+ ifr.ifr_flags= IFF_TUN | IFF_NO_PI;
+
+ if (ifname) {
+ if (strlen(ifname) > IFNAMSIZ-1)
+ return staticerr(ip,"tun interface name too long");
+ strcpy(ifr.ifr_name, ifname);
+ }
+
+ fd= open("/dev/net/tun", O_RDWR);
+ if (fd<0) return posixerr(ip,errno,"open /dev/net/tun");
+
+ r= ioctl(fd, TUNSETIFF, (void*)&ifr);
+ if (r) return posixerr(ip,errno,"ioctl TUNSETIFF");
+
+
+
+ r=
+ r= bind(fd, sa, al); if (r) return sockfail(ip,fd,"bind");
+ r= setnonblock(fd, 1); if (r) return sockfail(ip,fd,"setnonblock");
+
+ sock= TALLOC(sizeof(DgramSocket));
+ sock->ix= -1;
+ sock->fd= fd;
+ sock->script= 0;
+ sock->addr_buflen= al+1;
+ sock->addr_buf= TALLOC(sock->addr_buflen);
+ sock->msg_buflen= 0;
+ sock->msg_buf= 0;
+
+ *sock_r= sock;
+ return TCL_OK;
+}
+
+int do_tuntap_socket_transmit(ClientData cd, Tcl_Interp *ip,
+ TuntapSocket *sock, HBytes_Value data,
+ SockAddr_Value remote) {
+ int l, r;
+
+ r= sendto(sock->fd,
+ hbytes_data(&data), l=hbytes_len(&data),
+ 0,
+ sockaddr_addr(&remote), sockaddr_len(&remote));
+ if (r==-1) return posixerr(ip,errno,"sendto");
+ else if (r!=l) return staticerr(ip,"sendto gave wrong answer",0);
+ return TCL_OK;
+}
+
+static void cancel(TuntapSocket *sock) {
+ if (sock->script) {
+ Tcl_DeleteFileHandler(sock->fd);
+ Tcl_DecrRefCount(sock->script);
+ sock->script= 0;
+ }
+}
+
+static void recv_call(ClientData sock_cd, int mask) {
+ TuntapSocket *sock= (void*)sock_cd;
+ Tcl_Interp *ip= sock->ip;
+ int sz, rc, i, peek;
+ HBytes_Value message_val;
+ SockAddr_Value peer_val;
+ Tcl_Obj *args[3], *invoke;
+ struct msghdr mh;
+ struct iovec iov;
+
+ hbytes_empty(&message_val);
+ sockaddr_clear(&peer_val);
+ invoke=0; for (i=0; i<3; i++) args[i]=0;
+
+ mh.msg_iov= &iov;
+ mh.msg_iovlen= 1;
+ mh.msg_control= 0;
+ mh.msg_controllen= 0;
+ mh.msg_flags= 0;
+
+ peek= MSG_PEEK;
+
+ for (;;) {
+ mh.msg_name= sock->addr_buf;
+ mh.msg_namelen= sock->addr_buflen;
+
+ iov.iov_base= sock->msg_buf;
+ iov.iov_len= sock->msg_buflen;
+
+ sz= recvmsg(sock->fd, &mh, peek);
+ if (sz==-1) { rc=0; goto x_rc; }
+
+ assert(mh.msg_namelen < sock->addr_buflen);
+
+ if (!(mh.msg_flags & MSG_TRUNC)) {
+ if (!peek) break;
+ peek= 0;
+ continue;
+ }
+
+ TFREE(sock->msg_buf);
+ sock->msg_buflen *= 2;
+ sock->msg_buflen += 100;
+ sock->msg_buf= TALLOC(sock->msg_buflen);
+ }
+
+ hbytes_array(&message_val, iov.iov_base, sz);
+ sockaddr_create(&peer_val, mh.msg_name, mh.msg_namelen);
+
+ args[0]= ret_hb(ip, message_val); hbytes_empty(&message_val);
+ args[1]= ret_sockaddr(ip, peer_val); sockaddr_clear(&peer_val);
+ args[2]= ret_sockid(ip, sock);
+ for (i=0; i<3; i++) Tcl_IncrRefCount(args[i]);
+
+ invoke= Tcl_DuplicateObj(sock->script);
+ Tcl_IncrRefCount(invoke);
+
+ rc= Tcl_ListObjReplace(ip,invoke,sock->script_llength,0,3,args);
+ for (i=0; i<3; i++) { Tcl_DecrRefCount(args[i]); args[i]= 0; }
+ if (rc) goto x_rc;
+
+ rc= Tcl_EvalObjEx(ip,invoke,TCL_EVAL_GLOBAL|TCL_EVAL_DIRECT);
+
+x_rc:
+ if (invoke) Tcl_DecrRefCount(invoke);
+
+ if (rc)
+ Tcl_BackgroundError(ip);
+}
+
+int do_tuntap_socket_on_receive(ClientData cd, Tcl_Interp *ip,
+ TuntapSocket *sock, Tcl_Obj *script) {
+ int rc;
+
+ if (script) {
+ rc= Tcl_ListObjLength(ip, script, &sock->script_llength);
+ if (rc) return rc;
+ }
+
+ cancel(sock);
+ if (script) {
+ Tcl_IncrRefCount(script);
+ sock->script= script;
+ sock->ip= ip;
+ }
+ Tcl_CreateFileHandler(sock->fd, TCL_READABLE, recv_call, sock);
+ return TCL_OK;
+}
+
+int do_tuntap_socket_close(ClientData cd, Tcl_Interp *ip, TuntapSocket *sock) {
+ int sockix;
+ cancel(sock);
+ close(sock->fd); /* nothing useful to be done with errors */
+ sockix= sock->ix;
+ TFREE(sock->addr_buf);
+ TFREE(sock->msg_buf);
+ TFREE(sock);
+ socks[sockix]= 0;
+ return TCL_OK;
+}
+
+/* Arg parsing */
+
+int pat_sockid(Tcl_Interp *ip, Tcl_Obj *o, TuntapSocket **val) {
+ int rc, sockix;
+ TuntapSocket *sock;
+
+ rc= Tcl_ConvertToType(ip,o,&tuntapsockid_type);
+ if (rc) return rc;
+
+ sockix= o->internalRep.longValue;
+ if (sockix >= n_socks || !(sock= socks[sockix]))
+ return staticerr(ip,"tuntap socket not open",0);
+
+ assert(socks[sockix]->ix == sockix);
+
+ *val= sock;
+ return TCL_OK;
+}
+
+Tcl_Obj *ret_sockid(Tcl_Interp *ip, TuntapSocket *val) {
+ Tcl_Obj *o;
+
+ o= Tcl_NewObj();
+ Tcl_InvalidateStringRep(o);
+ o->internalRep.longValue= val->ix;
+ o->typePtr= &tuntapsockid_type;
+ return o;
+}
+
+static void sockid_t_free(Tcl_Obj *o) { }
+
+static void sockid_t_dup(Tcl_Obj *src, Tcl_Obj *dup) {
+ dup->internalRep= src->internalRep;
+ dup->typePtr= &tuntapsockid_type;
+}
+
+static void sockid_t_ustr(Tcl_Obj *o) {
+ char buf[75];
+
+ snprintf(buf,sizeof(buf), "%d", (int)o->internalRep.longValue);
+ obj_updatestr_vstringls(o,
+ "tuntapsock",9,
+ buf, strlen(buf),
+ (char*)0);
+}
+
+static int sockid_t_sfa(Tcl_Interp *ip, Tcl_Obj *o) {
+ unsigned long ul;
+ char *ep, *str;
+
+ str= Tcl_GetStringFromObj(o,0);
+ if (memcmp(str,"tuntapsock",9)) return staticerr(ip,"bad tuntap socket id",0);
+ errno=0; ul=strtoul(str+9,&ep,10);
+ if (errno || *ep) return staticerr(ip,"bad tuntap socket id number",0);
+ if (ul > INT_MAX) return staticerr(ip,"out of range tuntap socket id",0);
+
+ objfreeir(o);
+ o->internalRep.longValue= ul;
+ o->typePtr= &tuntapsockid_type;
+ return TCL_OK;
+}
+
+Tcl_ObjType tuntapsockid_type = {
+ "tuntapsockid",
+ sockid_t_free, sockid_t_dup, sockid_t_ustr, sockid_t_sfa
+};
~ian / chiark-tcl.git / commitdiff