Socket address stuff. Sockid is broken still.

[chiark-tcl.git] / dgram / dgram.c

diff --git a/dgram/dgram.c b/dgram/dgram.c
new file mode 100644 (file)
index 0000000..ecdd2f7
--- /dev/null
+++ b/dgram/dgram.c
@@ -0,0 +1,91 @@
+/*
+ */
+/*
+ * 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>]
+ */
+
+#include "tables.h"
+#include "hbytes.h"
+
+static int sockfail(Tcl_Interp *ip, int fd, const char *m) {
+  int e;
+  e= errno;
+  close(fd);
+  return posixerr(ip,e,m);
+}
+
+int do_dgram_socket_create(ClientData cd, Tcl_Interp *ip,
+                         SockAddr_Value local, int *result) {
+  int fd, al, r;
+  const struct sockaddr *sa;
+
+  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");
+  *result= fd;
+  return TCL_OK;
+}
+
+/* Arg parsing */
+
+int pat_sockid(Tcl_Interp *ip, Tcl_Obj *o, int *val) {
+  int rc;
+  
+  rc= Tcl_ConvertToType(ip,o,&sockid_type);
+  if (rc) return rc;
+
+  *val= o->internalRep.longValue;
+  return TCL_OK;
+}
+
+Tcl_Obj *ret_sockid(Tcl_Interp *ip, int val) {
+  Tcl_Obj *o;
+
+  o= Tcl_NewObj();
+  Tcl_InvalidateStringRep(o);
+  o->internalRep.longValue= val;
+  o->typePtr= &sockid_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;
+}
+
+static void sockid_t_ustr(Tcl_Obj *o) {
+  char buf[100];
+  int l;
+
+  snprintf(buf,sizeof(buf),"dgramsock%d", (int)o->internalRep.longValue);
+  l= o->length= strlen(buf);
+  o->bytes= TALLOC(l+1);
+  strcpy(o->bytes, buf);
+}
+
+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");
+  errno=0; ul=strtoul(str+9,&ep,10);
+  if (errno || *ep) return staticerr(ip,"bad dgram socket id number");
+  if (ul > INT_MAX) return staticerr(ip,"out of range dgram socket id");
+  o->internalRep.longValue= ul;
+  return TCL_OK;
+}
+
+Tcl_ObjType sockid_type = {
+  "sockid-nearly",
+  sockid_t_free, sockid_t_dup, sockid_t_ustr, sockid_t_sfa
+};