* dgram-socket create <local> => <sockid>
* dgram-socket close <sockid>
* dgram-socket transmit <sockid> <data> <remote>
- * dgram-socket on-receive <sockid> <script>
+ * 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"
typedef struct DgramSocket {
- int fd;
+ int ix, 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 DgramSocket **socks;
static int sockfail(Tcl_Interp *ip, int fd, const char *m) {
int e;
}
int do_dgram_socket_create(ClientData cd, Tcl_Interp *ip,
- SockAddr_Value local, int *sock_r) {
- int fd, al, r, sock;
+ SockAddr_Value local, DgramSockID *sock_r) {
+ int fd, al, r, sockix;
+ DgramSocket *sock;
const struct sockaddr *sa;
- for (sock=0; sock<n_socks && socks[sock].fd>=0; sock++);
- if (sock>=n_socks) {
+ 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 (sock<n_socks) socks[sock++].fd=-1;
- sock--;
+ while (sockix<n_socks) socks[sockix++]=0;
+ sockix--;
}
sa= sockaddr_addr(&local);
r= bind(fd, sa, al); if (r) return sockfail(ip,fd,"bind");
r= setnonblock(fd, 1); if (r) return sockfail(ip,fd,"setnonblock");
- socks[sock].fd= fd;
+ socks[sockix]= sock= TALLOC(sizeof(DgramSocket));
+ sock->fd= fd;
+ sock->ix= sockix;
+ 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_dgram_socket_close(ClientData cd, Tcl_Interp *ip, int sock) {
- close(socks[sock].fd); /* nothing useful to be done with errors */
- socks[sock].fd= -1;
+int do_dgram_socket_transmit(ClientData cd, Tcl_Interp *ip,
+ DgramSocket *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(DgramSocket *sock) {
+ if (sock->script) {
+ Tcl_DeleteFileHandler(sock->fd);
+ Tcl_DecrRefCount(sock->script);
+ sock->script= 0;
+ }
+}
+
+static void recv_call(ClientData sock_cd, int mask) {
+ DgramSocket *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_dgram_socket_on_receive(ClientData cd, Tcl_Interp *ip,
+ DgramSocket *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_dgram_socket_close(ClientData cd, Tcl_Interp *ip, DgramSocket *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, int *val) {
- int rc, sock;
+int pat_sockid(Tcl_Interp *ip, Tcl_Obj *o, DgramSocket **val) {
+ int rc, sockix;
+ DgramSocket *sock;
- rc= Tcl_ConvertToType(ip,o,&sockid_type);
+ rc= Tcl_ConvertToType(ip,o,&dgramsockid_type);
if (rc) return rc;
- sock= o->internalRep.longValue;
- if (sock >= n_socks || socks[sock].fd==-1)
- return staticerr(ip,"dgram socket not open");
+ 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, int val) {
+Tcl_Obj *ret_sockid(Tcl_Interp *ip, DgramSocket *val) {
Tcl_Obj *o;
o= Tcl_NewObj();
Tcl_InvalidateStringRep(o);
- o->internalRep.longValue= val;
- o->typePtr= &sockid_type;
+ o->internalRep.longValue= val->ix;
+ o->typePtr= &dgramsockid_type;
return 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[100];
- int l;
+ char buf[75];
- snprintf(buf,sizeof(buf),"dgramsock%d", (int)o->internalRep.longValue);
- l= o->length= strlen(buf);
- o->bytes= TALLOC(l+1);
- strcpy(o->bytes, buf);
+ 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) {
char *ep, *str;
str= Tcl_GetStringFromObj(o,0);
- if (memcmp(str,"dgramsock",9)) return staticerr(ip,"bad dgram socket id");
+ 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");
- if (ul > INT_MAX) return staticerr(ip,"out of range dgram socket id");
+ 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;
return TCL_OK;
}
-Tcl_ObjType sockid_type = {
- "sockid-nearly",
+Tcl_ObjType dgramsockid_type = {
+ "dgramsockid",
sockid_t_free, sockid_t_dup, sockid_t_ustr, sockid_t_sfa
};
~ian / chiark-tcl.git / blobdiff