216 lines
5.5 KiB
C
216 lines
5.5 KiB
C
/*
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* Copyright (c) 2005, Dan Ponte
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*
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* sockstuff.c - Implement SOCK_STREAM AF_LOCAL sockets for Tcl
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* $Amigan: phoned/lib/tcl/sockstuff.c,v 1.4 2005/06/26 16:06:49 dcp1990 Exp $ */
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <sys/select.h>
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/* network stuff */
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <sys/un.h>
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#include <errno.h>
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#include <tcl.h>
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#define mseterr(m) Udom_Error(interp, m)
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#define CMD_ARGS (ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *CONST objv[])
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typedef struct cdta {
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int fd;
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Tcl_Channel channel;
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} Udom_Cdata_t;
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Udom_Error(interp, msg)
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Tcl_Interp *interp;
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char *msg;
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{
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Tcl_SetResult(interp, msg, TCL_STATIC);
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return TCL_ERROR;
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}
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int Udom_Close(cdata, interp)
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ClientData cdata;
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Tcl_Interp *interp;
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{
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int rc;
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Udom_Cdata_t *idata = (Udom_Cdata_t*)cdata;
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rc = close(idata->fd);
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ckfree((char*)idata);
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return rc == 0 ? rc : errno;
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}
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int Udom_Input(cdata, buf, sizebuf, errorptr)
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ClientData cdata;
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char *buf;
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int sizebuf;
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int *errorptr;
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{
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int ec;
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Udom_Cdata_t *idata = (Udom_Cdata_t*)cdata;
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ec = read(idata->fd, buf, sizebuf);
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if(ec == -1) {
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*errorptr = errno;
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return -1;
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} else {
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return ec;
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}
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}
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int Udom_Output(cdata, buf, towrite, ecptr)
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ClientData cdata;
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CONST char *buf;
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int towrite;
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int *ecptr;
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{
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int rc;
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Udom_Cdata_t *idata = (Udom_Cdata_t*)cdata;
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rc = write(idata->fd, buf, towrite);
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if(rc == -1) {
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*ecptr = errno;
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return -1;
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} else {
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return rc;
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}
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}
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void Udom_Watch(cdata, mask)
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ClientData cdata;
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int mask;
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{
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Udom_Cdata_t *idata = (Udom_Cdata_t*)cdata;
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if(mask) {
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Tcl_CreateFileHandler(idata->fd, mask,
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(Tcl_FileProc*)Tcl_NotifyChannel,
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(ClientData)idata->channel);
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} else {
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Tcl_DeleteFileHandler(idata->fd);
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}
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}
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int Udom_GetHandle(cdata, dir, handptr)
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ClientData cdata;
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int dir;
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ClientData *handptr;
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{
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Udom_Cdata_t *idata = (Udom_Cdata_t*)cdata;
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*handptr = (ClientData)idata->fd;
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return TCL_OK;
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}
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/* write watcher */
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Tcl_ChannelType Udom_ChanType = {
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"udomain",
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TCL_CHANNEL_VERSION_3,
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&Udom_Close,
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&Udom_Input,
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&Udom_Output,
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NULL, /* seek */
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NULL, /* set and getoption, might do later */
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NULL,
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&Udom_Watch,
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&Udom_GetHandle,
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NULL, /* close2proc */
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NULL, /* block mode */
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NULL, /* flush */
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NULL, /* handler */
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NULL /* wideseek */
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};
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Tcl_Channel Udom_CreateChannel(sockfile, mask)
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CONST char *sockfile;
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int mask;
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{
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Udom_Cdata_t *cdt;
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int s;
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char chname[25];
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struct sockaddr_un them;
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cdt = (Udom_Cdata_t*)ckalloc(sizeof(Udom_Cdata_t));
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s = socket(AF_LOCAL, SOCK_STREAM, 0);
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strcpy(them.sun_path, sockfile);
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them.sun_family = AF_LOCAL;
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if(connect(s, (struct sockaddr *)&them, 1 + strlen(them.sun_path) + sizeof(them.sun_family)) == -1) {
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ckfree((char*)cdt);
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return NULL;
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}
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cdt->fd = s;
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snprintf(chname, 24, "udom%d", cdt->fd);
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cdt->channel = Tcl_CreateChannel(&Udom_ChanType, chname, cdt, mask);
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return cdt->channel;
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}
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int Udom_Cmd (cdata, interp, argc, argv)
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ClientData cdata;
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Tcl_Interp *interp;
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int argc;
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Tcl_Obj *const argv[];
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{
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char *arg;
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char *sfl = NULL;
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int a, optind;
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Tcl_Channel res;
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const char *udomopt[] = {
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"-file", (char*)NULL
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};
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enum udomopt {
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UDOM_FILE
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};
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for(a = 1; a < argc; a++) {
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arg = Tcl_GetString(argv[a]);
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if(*arg != '-') break;
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if(Tcl_GetIndexFromObj(interp, argv[a], udomopt, "option", TCL_EXACT, &optind)
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!= TCL_OK) return TCL_ERROR;
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switch((enum udomopt)optind) {
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case UDOM_FILE:
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if(a >= argc) return mseterr("needs file!");
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sfl = Tcl_GetString(argv[a]);
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break;
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default:
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Tcl_Panic("udom: bad optind to opts");
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}
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}
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if(sfl == NULL) return mseterr("file argument REQUIRED.");
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res = Udom_CreateChannel(sfl, TCL_READABLE | TCL_WRITABLE);
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if(res == NULL) return TCL_ERROR;
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Tcl_ResetResult(interp);
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Tcl_AppendResult(interp, Tcl_GetChannelName(res), (char*)NULL);
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return TCL_OK;
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}
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int Udom_Init(interp)
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Tcl_Interp *interp;
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{
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Tcl_CreateObjCommand(interp, "udom", Udom_Cmd, (ClientData)NULL, (Tcl_CmdDeleteProc*)NULL);
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return TCL_OK;
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}
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