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/* Distributed Checksum Clearinghouse
*
* connect to a DCC server for an administrative program
*
* Copyright (c) 2005 by Rhyolite Software
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND RHYOLITE SOFTWARE DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL RHYOLITE SOFTWARE
* BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*
* Rhyolite Software DCC 1.2.74-1.24 $Revision$
*/
#include "dcc_clnt.h"
#include "dcc_heap_debug.h"
#include "dcc_paths.h"
static DCC_CLNT_CTXT *ctxt_free;
static int ctxts_active;
const char *
dcc_srvr_nm(void)
{
int inx;
DCC_SRVR_ADDR *cur_addr;
inx = dcc_clnt_info->dcc.act_inx;
if (inx >= dcc_clnt_info->dcc.num_addrs)
return "server";
cur_addr = &dcc_clnt_info->dcc.addrs[inx];
return dcc_clnt_info->dcc.nms[cur_addr->nm_inx].hostname;
}
/* Create a DCC client context
* The contexts must be locked */
DCC_CLNT_CTXT * /* 0=failed */
dcc_alloc_ctxt(void)
{
DCC_CLNT_CTXT *ctxt;
ctxt = ctxt_free;
if (ctxt) {
ctxt_free = ctxt->fwd;
} else {
ctxt = dcc_malloc(sizeof(*ctxt));
}
memset(ctxt, 0, sizeof(*ctxt));
ctxt->soc = INVALID_SOCKET;
++ctxts_active;
return ctxt;
}
/* the contexts must be locked */
u_char /* 0=file problems, 1=ok */
dcc_rel_ctxt(DCC_EMSG emsg, DCC_CLNT_CTXT *ctxt)
{
u_char result = 1;
if (ctxt->soc != INVALID_SOCKET
&& SOCKET_ERROR == closesocket(ctxt->soc)) {
dcc_pemsg(EX_OSERR, emsg, "close(ctxt): %s", ERROR_STR());
result = 0;
}
ctxt->fwd = ctxt_free;
ctxt_free = ctxt;
if (--ctxts_active < 0)
abort();
return result;
}
/* create a temporary an anonymous map file
* The contexts must be locked.
* On failure, everything is undone.
* On success, the file is initialized and mapped. */
u_char /* 0=failed; 1=mapped & locked */
dcc_map_lock_tmp_info(DCC_EMSG emsg, const DCC_SRVR_NM *nm, u_char flags)
{
DCC_PATH tmp_info_nm;
int fd;
fd = dcc_mkstemp(emsg, tmp_info_nm, sizeof(tmp_info_nm),
_PATH_TMP, "map", 1, 0, 0);
if (fd < 0)
return 0;
if (!dcc_create_map(emsg, tmp_info_nm, &fd, nm, 1, nm, 1, flags))
return 0;
return dcc_map_lock_info(emsg, tmp_info_nm, fd);
}
DCC_CLNT_CTXT * /* 0 failed */
dcc_clnt_init(DCC_EMSG emsg, DCC_CLNT_CTXT *ctxt,
const char *new_info_map_nm,
u_char flags) /* DCC_CLNT_FG_* */
{
u_char mapped;
if (emsg)
*emsg = '\0';
dcc_ctxts_lock();
if (!ctxt) {
ctxt = dcc_alloc_ctxt();
if (!ctxt) {
dcc_ctxts_unlock();
return 0;
}
}
mapped = dcc_map_lock_info(emsg, new_info_map_nm, -1);
if (!mapped) {
dcc_rel_ctxt(0, ctxt);
dcc_ctxts_unlock();
return 0;
}
if (!dcc_clnt_rdy(emsg, ctxt, flags)) {
if (flags & DCC_CLNT_FG_NO_SRVR_OK) {
if (emsg && dcc_clnt_debug)
dcc_trace_msg("%s", emsg);
} else {
if (mapped > 1)
dcc_unmap_info(0);
dcc_rel_ctxt(0, ctxt);
dcc_ctxts_unlock();
return 0;
}
}
if (!dcc_info_unlock(emsg)) {
if (mapped > 1)
dcc_unmap_info(0);
dcc_rel_ctxt(0, ctxt);
dcc_ctxts_unlock();
return 0;
}
dcc_ctxts_unlock();
return ctxt;
}
/* start talking to a DCC server using an temporary parameter file */
DCC_CLNT_CTXT * /* 0=failed, 1=ready */
dcc_tmp_clnt_init(DCC_EMSG emsg, DCC_CLNT_CTXT *ctxt,
const DCC_SRVR_NM *new_srvr,
u_char grey, u_char lock_flags)
{
if (emsg)
*emsg = '\0';
dcc_ctxts_lock();
if (!dcc_map_lock_tmp_info(emsg, new_srvr, lock_flags)) {
if (ctxt)
dcc_rel_ctxt(0, ctxt);
dcc_ctxts_unlock();
return 0;
}
dcc_ctxts_unlock();
ctxt = dcc_clnt_init(emsg, ctxt, 0,
(grey ? DCC_CLNT_FG_GREY : 0)
| DCC_CLNT_FG_NO_FAIL);
if (!ctxt) {
dcc_unmap_info(0);
return 0;
}
return ctxt;
}
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