static int serve_file (CC_SFILE *f, char *probfname, int silent)
{
char request;
char probbuf[1024];
int id;
int rval;
rval = CCutil_sread_char (f, &request);
if (rval) {
fprintf (stderr, "CCutil_sread_char failed\n");
return rval;
}
rval = CCutil_sread_string (f, probbuf, sizeof (probbuf));
if (rval) {
fprintf (stderr, "CCutil_sread_string failed\n");
return rval;
}
rval = CCutil_sread_int (f, &id);
if (rval) {
fprintf (stderr, "CCutil_sread_int failed\n");
return rval;
}
if (strcmp (probfname, probbuf)) {
fprintf (stderr, "ERROR - serving %s, request %s\n", probfname,
probbuf);
return rval;
}
switch (request) {
case CCtsp_Pread:
rval = serve_read (f, probfname, id, silent);
if (rval) {
fprintf (stderr, "serve_read failed\n");
return rval;
}
break;
case CCtsp_Pwrite:
rval = serve_write (f, probfname, id, silent);
if (rval) {
fprintf (stderr, "serve_write failed\n");
return rval;
}
break;
case CCtsp_Pdelete:
rval = serve_delete (probname, id);
if (rval) {
fprintf (stderr, "serve_delete failed\n");
return rval;
}
break;
default:
fprintf (stderr, "Invalid request %c\n", request);
return 1;
}
return 0;
}
/*
* This the main loop receiving, processing, and sending packets.
*/
int
serve(ndd_t *nds)
{
ndpkt_t *pkt;
int rc;
/*
* Since we process only packet at time, we need just one
* preallocated buffer.
*/
if ((pkt = (ndpkt_t *)malloc(ND_MAXPKT)) == NULL) {
log_msg(0, "Unable to allocate buffer: %s.",
strerror(errno));
return (1);
}
do {
ssize_t pkt_len;
int op, err;
/* Get packet from the network */
pkt_len = recv(nds->sc_fd, (void *)pkt, ND_MAXPKT, 0);
if (nds->exiting)
break;
if (pkt_len == -1) {
log_msg(0, "Unable to receive packet: %s.",
strerror(errno));
break;
}
/* Verify just received packet */
err = verify_pkt(pkt, pkt_len);
/* ND protocol supports only 2 operations: read and write */
op = pkt->np_op & ND_OP_CODE;
if (op == ND_OP_READ) {
rc = serve_read(nds, pkt, err);
} else if (op == ND_OP_WRITE) {
rc = serve_write(nds, pkt, err);
} else {
log_msg(1, "Unknown operation %d.", op);
rc = 1;
}
} while (rc == 0 && nds->exiting == 0);
free(pkt);
return (rc);
}
