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/* Quintuple Agent client library
* Copyright (C) 1999 Robert Bihlmeyer <robbe@orcus.priv.at>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define _GNU_SOURCE 1
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h> /* must be before sys/stat.h due to Ultrix-breakage */
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include "i18n.h"
#include "agentlib.h"
#include "util.h"
#include "memory.h"
static int sock = -1;
int agent_init()
{
char *sockname;
struct sockaddr_un *addr;
socklen_t len;
if (sock != -1)
return 0;
if ((sockname = getenv("AGENT_SOCKET")) == NULL) {
fprintf(stderr, _("AGENT_SOCKET is not set\n"));
/* IDEA: should we try guessing sockets? */
return -1;
}
if (!(sock = socket(PF_UNIX, SOCK_STREAM, 0))) {
perror(_("could not create socket"));
return -1;
}
len = offsetof(struct sockaddr_un, sun_path) + strlen(sockname) + 1;
addr = alloca(len);
addr->sun_family = AF_UNIX;
strcpy(addr->sun_path, sockname);
if (connect(sock, (struct sockaddr *)addr, len) < 0) {
perror(_("could not connect to server"));
return -1;
}
return 0;
}
int agent_done()
{
int ret;
ret = close(sock);
sock = -1;
return ret;
}
static status_t
send_request(request *req, size_t size, reply **re, size_t *rsize)
{
static reply tmp;
reply *r;
size_t s;
ssize_t n;
req->magic = REQUEST_MAGIC;
if (re) {
r = *re;
s = *rsize;
} else {
r = &tmp;
s = sizeof(reply);
}
if (xwrite(sock, req, size) >= 0) {
if ((n = read(sock, r, s)) >= 0) {
if (r->magic == REPLY_MAGIC) {
return r->status;
} else {
fprintf(stderr,
_("wrong magic number on reply - maybe your agent is old?\n"));
return r->status = STATUS_COMM_ERR;
}
} else
perror(_("error receiving reply"));
} else
perror(_("could not send request"));
return r->status = STATUS_COMM_ERR;
}
status_t agent_list(reply_list **rep)
{
status_t ret;
request req;
size_t rs;
req.type = REQ_LIST;
rs = sizeof(reply_list);
ret = send_request(&req, sizeof(req), (reply **)rep, &rs);
if (ret == STATUS_OK && (*rep)->entries) {
unsigned i;
*rep =
realloc(*rep, sizeof(reply_list)
+ (*rep)->entries * sizeof(reply_list_entry));
if (!*rep) {
fprintf(stderr, _("out of memory\n"));
return STATUS_FAIL;
}
for (i=0; i < (*rep)->entries; i++) {
if (read(sock, (*rep)->entry + i, sizeof(reply_list_entry))
!= sizeof(reply_list_entry)) {
perror(_("error receiving reply"));
break;
}
}
}
return ret;
}
status_t agent_put(const char *id, const flags_t flags, const time_t deadline,
const char *comment, const char *data)
{
status_t ret;
request_put *req;
if (!(req = secmem_malloc(sizeof(request_put)))) {
fprintf(stderr, _("could not allocate space in secure storage\n"));
return STATUS_FAIL;
}
req->type = REQ_PUT;
strcpy(req->id, id);
req->flags = flags;
req->deadline = deadline;
strcpy(req->comment, comment);
strcpy(req->data, data);
ret = send_request((request *)req, sizeof(request_put), NULL, 0);
secmem_free(req);
return ret;
}
status_t agent_get(const char *id, reply_get **rep)
{
request_get req;
size_t rs;
req.type = REQ_GET;
strcpy(req.id, id);
rs = sizeof(reply_get);
if (!(*rep = secmem_malloc(rs))) {
fprintf(stderr, _("could not allocate space in secure storage\n"));
return STATUS_FAIL;
}
return send_request((request *)&req, sizeof(req), (reply **)rep, &rs);
}
status_t agent_delete(const char *id)
{
request_get req;
req.type = REQ_DELETE;
strcpy(req.id, id);
return send_request((request *)&req, sizeof(req), NULL, 0);
}
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