591 lines
11 KiB
C
591 lines
11 KiB
C
/*
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* Copyright (c) 1996, 1998 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#if !defined(LINT) && !defined(CODECENTER)
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static const char rcsid[] = "$Id: irp.c,v 8.6 2000/02/04 08:28:33 vixie Exp $";
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#endif
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/* Imports */
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#include "port_before.h"
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#include <syslog.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <stdarg.h>
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#include <fcntl.h>
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#include <syslog.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <isc/memcluster.h>
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#include <irs.h>
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#include <irp.h>
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#include "irs_p.h"
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#include "irp_p.h"
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#include "port_after.h"
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/* Forward. */
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static void irp_close(struct irs_acc *);
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#define LINEINCR 128
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#if !defined(SUN_LEN)
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#define SUN_LEN(su) \
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(sizeof (*(su)) - sizeof ((su)->sun_path) + strlen((su)->sun_path))
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#endif
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/* Public */
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/* send errors to syslog if true. */
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int irp_log_errors = 1;
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/*
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* This module handles the irp module connection to irpd.
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*
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* The client expects a synchronous interface to functions like
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* getpwnam(3), so we can't use the ctl_* i/o library on this end of
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* the wire (it's used in the server).
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*/
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/*
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* irs_acc *irs_irp_acc(const char *options);
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*
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* Initialize the irp module.
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*/
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struct irs_acc *
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irs_irp_acc(const char *options) {
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struct irs_acc *acc;
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struct irp_p *irp;
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if (!(acc = memget(sizeof *acc))) {
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errno = ENOMEM;
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return (NULL);
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}
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memset(acc, 0x5e, sizeof *acc);
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if (!(irp = memget(sizeof *irp))) {
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errno = ENOMEM;
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free(acc);
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return (NULL);
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}
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irp->inlast = 0;
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irp->incurr = 0;
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irp->fdCxn = -1;
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acc->private = irp;
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#ifdef WANT_IRS_GR
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acc->gr_map = irs_irp_gr;
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#else
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acc->gr_map = NULL;
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#endif
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#ifdef WANT_IRS_PW
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acc->pw_map = irs_irp_pw;
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#else
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acc->pw_map = NULL;
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#endif
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acc->sv_map = irs_irp_sv;
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acc->pr_map = irs_irp_pr;
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acc->ho_map = irs_irp_ho;
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acc->nw_map = irs_irp_nw;
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acc->ng_map = irs_irp_ng;
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acc->close = irp_close;
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return (acc);
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}
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int
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irs_irp_connection_setup(struct irp_p *cxndata, int *warned) {
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if (irs_irp_is_connected(cxndata)) {
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return (0);
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} else if (irs_irp_connect(cxndata) != 0) {
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if (warned != NULL && !*warned) {
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syslog(LOG_ERR, "irpd connection failed: %m\n");
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(*warned)++;
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}
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return (-1);
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}
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return (0);
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}
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/*
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* int irs_irp_connect(void);
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*
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* Sets up the connection to the remote irpd server.
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*
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* Returns:
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*
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* 0 on success, -1 on failure.
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*
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*/
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int
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irs_irp_connect(struct irp_p *pvt) {
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int flags;
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struct sockaddr *addr;
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struct sockaddr_in iaddr;
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#ifndef NO_SOCKADDR_UN
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struct sockaddr_un uaddr;
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#endif
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long ipaddr;
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const char *irphost;
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int code;
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char text[256];
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int socklen = 0;
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if (pvt->fdCxn != -1) {
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perror("fd != 1");
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return (-1);
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}
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#ifndef NO_SOCKADDR_UN
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memset(&uaddr, 0, sizeof uaddr);
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#endif
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memset(&iaddr, 0, sizeof iaddr);
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irphost = getenv(IRPD_HOST_ENV);
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if (irphost == NULL) {
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irphost = "127.0.0.1";
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}
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#ifndef NO_SOCKADDR_UN
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if (irphost[0] == '/') {
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addr = (struct sockaddr *)&uaddr;
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strncpy(uaddr.sun_path, irphost, sizeof uaddr.sun_path);
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uaddr.sun_family = AF_UNIX;
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socklen = SUN_LEN(&uaddr);
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#ifdef HAVE_SA_LEN
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uaddr.sun_len = socklen;
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#endif
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} else
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#endif
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{
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if (inet_pton(AF_INET, irphost, &ipaddr) != 1) {
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errno = EADDRNOTAVAIL;
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perror("inet_pton");
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return (-1);
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}
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addr = (struct sockaddr *)&iaddr;
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socklen = sizeof iaddr;
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#ifdef HAVE_SA_LEN
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iaddr.sin_len = socklen;
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#endif
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iaddr.sin_family = AF_INET;
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iaddr.sin_port = htons(IRPD_PORT);
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iaddr.sin_addr.s_addr = ipaddr;
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}
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pvt->fdCxn = socket(addr->sa_family, SOCK_STREAM, PF_UNSPEC);
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if (pvt->fdCxn < 0) {
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perror("socket");
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return (-1);
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}
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if (connect(pvt->fdCxn, addr, socklen) != 0) {
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perror("connect");
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return (-1);
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}
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flags = fcntl(pvt->fdCxn, F_GETFL, 0);
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if (flags < 0) {
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close(pvt->fdCxn);
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perror("close");
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return (-1);
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}
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#if 0
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flags |= O_NONBLOCK;
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if (fcntl(pvt->fdCxn, F_SETFL, flags) < 0) {
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close(pvt->fdCxn);
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perror("fcntl");
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return (-1);
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}
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#endif
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code = irs_irp_read_response(pvt, text, sizeof text);
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if (code != IRPD_WELCOME_CODE) {
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if (irp_log_errors) {
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syslog(LOG_WARNING, "Connection failed: %s", text);
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}
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irs_irp_disconnect(pvt);
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return (-1);
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}
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return (0);
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}
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/*
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* int irs_irp_is_connected(struct irp_p *pvt);
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*
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* Returns:
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*
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* Non-zero if streams are setup to remote.
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*
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*/
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int
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irs_irp_is_connected(struct irp_p *pvt) {
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return (pvt->fdCxn >= 0);
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}
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/*
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* void
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* irs_irp_disconnect(struct irp_p *pvt);
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*
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* Closes streams to remote.
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*/
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void
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irs_irp_disconnect(struct irp_p *pvt) {
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if (pvt->fdCxn != -1) {
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close(pvt->fdCxn);
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pvt->fdCxn = -1;
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}
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}
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int
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irs_irp_read_line(struct irp_p *pvt, char *buffer, int len) {
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char *realstart = &pvt->inbuffer[0];
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char *p, *start, *end;
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int spare;
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int i;
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int buffpos = 0;
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int left = len - 1;
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while (left > 0) {
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start = p = &pvt->inbuffer[pvt->incurr];
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end = &pvt->inbuffer[pvt->inlast];
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while (p != end && *p != '\n')
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p++;
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if (p == end) {
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/* Found no newline so shift data down if necessary
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* and append new data to buffer
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*/
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if (start > realstart) {
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memmove(realstart, start, end - start);
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pvt->inlast = end - start;
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start = realstart;
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pvt->incurr = 0;
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end = &pvt->inbuffer[pvt->inlast];
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}
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spare = sizeof (pvt->inbuffer) - pvt->inlast;
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p = end;
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i = read(pvt->fdCxn, end, spare);
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if (i < 0) {
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close(pvt->fdCxn);
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pvt->fdCxn = -1;
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return (buffpos > 0 ? buffpos : -1);
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} else if (i == 0) {
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return (buffpos);
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}
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end += i;
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pvt->inlast += i;
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while (p != end && *p != '\n')
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p++;
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}
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if (p == end) {
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/* full buffer and still no newline */
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i = sizeof pvt->inbuffer;
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} else {
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/* include newline */
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i = p - start + 1;
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}
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if (i > left)
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i = left;
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memcpy(buffer + buffpos, start, i);
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pvt->incurr += i;
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buffpos += i;
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buffer[buffpos] = '\0';
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if (p != end) {
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left = 0;
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} else {
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left -= i;
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}
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}
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#if 0
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fprintf(stderr, "read line: %s\n", buffer);
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#endif
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return (buffpos);
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}
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/*
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* int irp_read_response(struct irp_p *pvt);
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*
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* Returns:
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*
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* The number found at the beginning of the line read from
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* FP. 0 on failure(0 is not a legal response code). The
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* rest of the line is discarded.
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*
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*/
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int
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irs_irp_read_response(struct irp_p *pvt, char *text, size_t textlen) {
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char line[1024];
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int code;
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char *p;
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if (irs_irp_read_line(pvt, line, sizeof line) <= 0) {
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return (0);
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}
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p = strchr(line, '\n');
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if (p == NULL) {
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return (0);
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}
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if (sscanf(line, "%d", &code) != 1) {
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code = 0;
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} else if (text != NULL && textlen > 0) {
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p = line;
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while (isspace(*p)) p++;
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while (isdigit(*p)) p++;
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while (isspace(*p)) p++;
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strncpy(text, p, textlen - 1);
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p[textlen - 1] = '\0';
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}
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return (code);
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}
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/*
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* char *irp_read_body(struct irp_p *pvt, size_t *size);
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*
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* Read in the body of a response. Terminated by a line with
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* just a dot on it. Lines should be terminated with a CR-LF
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* sequence, but we're nt piccky if the CR is missing.
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* No leading dot escaping is done as the protcol doesn't
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* use leading dots anywhere.
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*
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* Returns:
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*
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* Pointer to null-terminated buffer allocated by memget.
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* *SIZE is set to the length of the buffer.
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*
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*/
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char *
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irs_irp_read_body(struct irp_p *pvt, size_t *size) {
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char line[1024];
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u_int linelen;
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size_t len = LINEINCR;
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char *buffer = memget(len);
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int idx = 0;
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for (;;) {
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if (irs_irp_read_line(pvt, line, sizeof line) <= 0 ||
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strchr(line, '\n') == NULL)
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goto death;
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linelen = strlen(line);
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if (line[linelen - 1] != '\n')
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goto death;
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/* We're not strict about missing \r. Should we be?? */
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if (linelen > 2 && line[linelen - 2] == '\r') {
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line[linelen - 2] = '\n';
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line[linelen - 1] = '\0';
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linelen--;
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}
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if (linelen == 2 && line[0] == '.') {
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*size = len;
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buffer[idx] = '\0';
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return (buffer);
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}
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if (linelen > (len - (idx + 1))) {
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char *p = memget(len + LINEINCR);
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if (p == NULL)
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goto death;
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memcpy(p, buffer, len);
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memput(buffer, len);
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buffer = p;
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len += LINEINCR;
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}
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memcpy(buffer + idx, line, linelen);
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idx += linelen;
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}
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death:
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memput(buffer, len);
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return (NULL);
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}
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/*
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* int irs_irp_get_full_response(struct irp_p *pvt, int *code,
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* char **body, size_t *bodylen);
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*
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* Gets the response to a command. If the response indicates
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* there's a body to follow(code % 10 == 1), then the
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* body buffer is allcoated with memget and stored in
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* *BODY. The length of the allocated body buffer is stored
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* in *BODY. The caller must give the body buffer back to
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* memput when done. The results code is stored in *CODE.
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*
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* Returns:
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*
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* 0 if a result was read. -1 on some sort of failure.
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*
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*/
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int
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irs_irp_get_full_response(struct irp_p *pvt, int *code, char *text,
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size_t textlen, char **body, size_t *bodylen) {
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int result = irs_irp_read_response(pvt, text, textlen);
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*body = NULL;
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if (result == 0) {
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return (-1);
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}
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*code = result;
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/* Code that matches 2xx is a good result code.
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* Code that matches xx1 means there's a response body coming.
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*/
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if ((result / 100) == 2 && (result % 10) == 1) {
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*body = irs_irp_read_body(pvt, bodylen);
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if (*body == NULL) {
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return (-1);
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}
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}
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return (0);
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}
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/*
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* int irs_irp_send_command(struct irp_p *pvt, const char *fmt, ...);
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*
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* Sends command to remote connected via the PVT
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* struture. FMT and args after it are fprintf-like
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* arguments for formatting.
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*
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* Returns:
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*
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* 0 on success, -1 on failure.
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*/
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int
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irs_irp_send_command(struct irp_p *pvt, const char *fmt, ...) {
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va_list ap;
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char buffer[1024];
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int pos = 0;
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int i, todo;
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if (pvt->fdCxn < 0) {
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return (-1);
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}
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va_start(ap, fmt);
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todo = vsprintf(buffer, fmt, ap);
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if (todo > sizeof buffer - 2) {
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syslog(LOG_CRIT, "memory overrun in irs_irp_send_command()");
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exit(1);
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}
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strcat(buffer, "\r\n");
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todo = strlen(buffer);
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while (todo > 0) {
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i = write(pvt->fdCxn, buffer + pos, todo);
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#if 0
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/* XXX brister */
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fprintf(stderr, "Wrote: \"");
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fwrite(buffer + pos, sizeof (char), todo, stderr);
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fprintf(stderr, "\"\n");
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#endif
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if (i < 0) {
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close(pvt->fdCxn);
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pvt->fdCxn = -1;
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return (-1);
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}
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todo -= i;
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}
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va_end(ap);
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return (0);
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}
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/* Methods */
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/*
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* void irp_close(struct irs_acc *this)
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*
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*/
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static void
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irp_close(struct irs_acc *this) {
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struct irp_p *irp = (struct irp_p *)this->private;
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if (irp != NULL) {
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irs_irp_disconnect(irp);
|
|
memput(irp, sizeof *irp);
|
|
}
|
|
|
|
memput(this, sizeof *this);
|
|
}
|
|
|
|
|
|
|