static void protocol_parse(KFile *fd, const char *buf)
{
const struct CmdTemplate *templ;
/* Command check. */
templ = parser_get_cmd_template(buf);
if (!templ)
{
kfile_print(fd, "-1 Invalid command.\r\n");
protocol_prompt(fd);
return;
}
parms args[PARSER_MAX_ARGS];
/* Args Check. TODO: Handle different case. see doc/PROTOCOL . */
if (!parser_get_cmd_arguments(buf, templ, args))
{
kfile_print(fd, "-2 Invalid arguments.\r\n");
protocol_prompt(fd);
return;
}
/* Execute. */
if(!parser_execute_cmd(templ, args))
{
NAK(fd, "Error in executing command.");
}
if (!protocol_reply(fd, templ, args))
{
NAK(fd, "Invalid return format.");
}
protocol_prompt(fd);
return;
}
void
main(int argc, char *argv[])
{
char *devdir;
int i, rv, netfd, bsize;
int datafd;
#ifndef plan9
void (*oldhandler)();
#endif
devdir = nil;
/* make connection */
if (argc != 2) {
fprint(stderr, "usage: %s network!destination!service\n", argv[0]);
exits("incorrect number of arguments");
}
/* read options line from stdin into lnbuf */
i = readline(0);
/* read stdin into tempfile to get size */
datafd = tempfile();
bsize = prereadfile(datafd);
/* network connection is opened after data is in to avoid timeout */
if ((netfd=dial(argv[1], 0, 0, 0)) < 0) {
fprint(stderr, "dialing %s\n", devdir);
perror("dial");
exits("can't dial");
}
/* write out the options we read above */
if (write(netfd, lnbuf, i) != i) {
error(0, "write error while sending options\n");
exits("write error while sending options");
}
/* send the size of the file to be sent */
sprint(lnbuf, "%d\n", bsize);
i = strlen(lnbuf);
if ((rv=write(netfd, lnbuf, i)) != i) {
perror("write error while sending size");
error(0, "write returned %d\n", rv);
exits("write error while sending size");
}
if (seek(datafd, 0L, 0) < 0) {
error(0, "error seeking temp file\n");
exits("seek error");
}
/* mirror performance in readfile() in lpdaemon */
#ifdef plan9
atnotify(alarmhandler, 1);
#else
oldhandler = signal(SIGALRM, alarmhandler);
#endif
dbgstate = 1;
if(!recvACK(netfd)) {
error(0, "failed to receive ACK before sending data\n");
exits("recv ack1 failed");
}
dbgstate = 2;
if ((i=pass(datafd, netfd, bsize)) != 0) {
NAK(netfd);
error(0, "failed to send %d bytes\n", i);
exits("send data failed");
}
ACK(netfd);
dbgstate = 3;
if(!recvACK(netfd)) {
error(0, "failed to receive ACK after sending data\n");
exits("recv ack2 failed");
}
/* get response, as from lp -q */
dbgstate = 4;
while((rv=read(netfd, jobbuf, RDSIZE)) > 0) {
if((write(1, jobbuf, rv)) != rv) {
error(0, "write error while sending to stdout\n");
exits("write error while sending to stdout");
}
}
dbgstate = 5;
#ifdef plan9
atnotify(alarmhandler, 0);
/* close down network connections and go away */
exits("");
#else
signal(SIGALRM, oldhandler);
exit(0);
#endif
}
