1099 lines
32 KiB
C
1099 lines
32 KiB
C
/*
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* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "iprop.h"
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RCSID("$Id$");
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static const char *config_name = "ipropd-slave";
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static int verbose;
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static krb5_log_facility *log_facility;
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static char five_min[] = "5 min";
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static char *server_time_lost = five_min;
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static int time_before_lost;
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const char *slave_str = NULL;
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static int
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connect_to_master (krb5_context context, const char *master,
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const char *port_str)
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{
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char port[NI_MAXSERV];
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struct addrinfo *ai, *a;
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struct addrinfo hints;
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int error;
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int one = 1;
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int s = -1;
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memset(&hints, 0, sizeof(hints));
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hints.ai_socktype = SOCK_STREAM;
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if (port_str == NULL) {
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snprintf(port, sizeof(port), "%u", IPROP_PORT);
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port_str = port;
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}
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error = getaddrinfo(master, port_str, &hints, &ai);
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if (error) {
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krb5_warnx(context, "Failed to get address of to %s: %s",
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master, gai_strerror(error));
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return -1;
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}
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for (a = ai; a != NULL; a = a->ai_next) {
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char node[NI_MAXHOST];
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error = getnameinfo(a->ai_addr, a->ai_addrlen,
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node, sizeof(node), NULL, 0, NI_NUMERICHOST);
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if (error)
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strlcpy(node, "[unknown-addr]", sizeof(node));
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s = socket(a->ai_family, a->ai_socktype, a->ai_protocol);
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if (s < 0)
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continue;
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if (connect(s, a->ai_addr, a->ai_addrlen) < 0) {
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krb5_warn(context, errno, "connection failed to %s[%s]",
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master, node);
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close(s);
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continue;
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}
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krb5_warnx(context, "connection successful "
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"to master: %s[%s]", master, node);
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break;
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}
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freeaddrinfo(ai);
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if (a == NULL)
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return -1;
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if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one)) < 0)
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krb5_warn(context, errno, "setsockopt(SO_KEEPALIVE) failed");
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/*
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* We write message lengths separately from the payload, avoid Nagle
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* delays.
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*/
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#if defined(IPPROTO_TCP) && defined(TCP_NODELAY)
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(void) setsockopt(s, IPPROTO_TCP, TCP_NODELAY,
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(void *)&one, sizeof(one));
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#endif
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return s;
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}
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static void
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get_creds(krb5_context context, const char *keytab_str,
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krb5_ccache *cache, const char *serverhost)
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{
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krb5_keytab keytab;
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krb5_principal client;
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krb5_error_code ret;
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krb5_get_init_creds_opt *init_opts;
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krb5_creds creds;
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char *server;
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char keytab_buf[256];
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int aret;
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if (keytab_str == NULL) {
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ret = krb5_kt_default_name (context, keytab_buf, sizeof(keytab_buf));
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if (ret)
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krb5_err (context, 1, ret, "krb5_kt_default_name");
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keytab_str = keytab_buf;
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}
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ret = krb5_kt_resolve(context, keytab_str, &keytab);
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if(ret)
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krb5_err(context, 1, ret, "%s", keytab_str);
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ret = krb5_sname_to_principal (context, slave_str, IPROP_NAME,
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KRB5_NT_SRV_HST, &client);
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if (ret) krb5_err(context, 1, ret, "krb5_sname_to_principal");
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ret = krb5_get_init_creds_opt_alloc(context, &init_opts);
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if (ret) krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
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aret = asprintf (&server, "%s/%s", IPROP_NAME, serverhost);
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if (aret == -1 || server == NULL)
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krb5_errx (context, 1, "malloc: no memory");
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ret = krb5_get_init_creds_keytab(context, &creds, client, keytab,
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0, server, init_opts);
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free (server);
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krb5_get_init_creds_opt_free(context, init_opts);
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if(ret) krb5_err(context, 1, ret, "krb5_get_init_creds");
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ret = krb5_kt_close(context, keytab);
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if(ret) krb5_err(context, 1, ret, "krb5_kt_close");
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ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, cache);
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if(ret) krb5_err(context, 1, ret, "krb5_cc_new_unique");
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ret = krb5_cc_initialize(context, *cache, creds.client);
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if(ret) krb5_err(context, 1, ret, "krb5_cc_initialize");
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ret = krb5_cc_store_cred(context, *cache, &creds);
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if(ret) krb5_err(context, 1, ret, "krb5_cc_store_cred");
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krb5_free_cred_contents(context, &creds);
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krb5_free_principal(context, client);
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}
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static krb5_error_code
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ihave(krb5_context context, krb5_auth_context auth_context,
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int fd, uint32_t version)
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{
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int ret;
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u_char buf[8];
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krb5_storage *sp;
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krb5_data data;
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sp = krb5_storage_from_mem(buf, 8);
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ret = krb5_store_uint32(sp, I_HAVE);
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if (ret == 0)
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ret = krb5_store_uint32(sp, version);
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krb5_storage_free(sp);
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data.length = 8;
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data.data = buf;
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if (ret == 0) {
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if (verbose)
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krb5_warnx(context, "telling master we are at %u", version);
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ret = krb5_write_priv_message(context, auth_context, &fd, &data);
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if (ret)
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krb5_warn(context, ret, "krb5_write_message");
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}
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return ret;
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}
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#ifndef EDQUOT
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/* There's no EDQUOT on WIN32, for example */
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#define EDQUOT ENOSPC
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#endif
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static int
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append_to_log_file(krb5_context context,
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kadm5_server_context *server_context,
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krb5_storage *sp, off_t start, ssize_t slen)
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{
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size_t len;
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ssize_t sret;
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off_t log_off;
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int ret, ret2;
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void *buf;
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if (verbose)
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krb5_warnx(context, "appending diffs to log");
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if (slen == 0)
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return 0;
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if (slen < 0)
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return EINVAL;
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len = slen;
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if (len != slen)
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return EOVERFLOW;
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buf = malloc(len);
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if (buf == NULL && len != 0)
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return krb5_enomem(context);
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if (krb5_storage_seek(sp, start, SEEK_SET) != start) {
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krb5_errx(context, IPROPD_RESTART,
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"krb5_storage_seek() failed"); /* can't happen */
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}
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sret = krb5_storage_read(sp, buf, len);
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if (sret < 0)
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return errno;
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if (len != (size_t)sret) {
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/* Can't happen */
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krb5_errx(context, IPROPD_RESTART,
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"short krb5_storage_read() from memory buffer");
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}
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log_off = lseek(server_context->log_context.log_fd, 0, SEEK_CUR);
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if (log_off == -1)
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return errno;
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/*
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* Use net_write() so we get an errno if less that len bytes were
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* written.
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*/
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sret = net_write(server_context->log_context.log_fd, buf, len);
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free(buf);
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if (sret != slen)
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ret = errno;
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else
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ret = fsync(server_context->log_context.log_fd);
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if (ret == 0)
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return 0;
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/*
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* Attempt to recover from this. First, truncate the log file
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* and reset the fd offset. Failure to do this -> unlink the
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* log file and re-create it. Since we're the slave, we ought to be
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* able to recover from the log being unlinked...
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*/
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if (ftruncate(server_context->log_context.log_fd, log_off) == -1 ||
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lseek(server_context->log_context.log_fd, log_off, SEEK_SET) == -1) {
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(void) kadm5_log_end(server_context);
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if (unlink(server_context->log_context.log_file) == -1) {
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krb5_err(context, IPROPD_FATAL, errno,
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"Failed to recover from failure to write log "
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"entries from master to disk");
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}
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ret2 = kadm5_log_init(server_context);
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if (ret2) {
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krb5_err(context, IPROPD_RESTART_SLOW, ret2,
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"Failed to initialize log to recover from "
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"failure to write log entries from master to disk");
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}
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}
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if (ret == ENOSPC || ret == EDQUOT || ret == EFBIG) {
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/* Unlink the file in these cases. */
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krb5_warn(context, IPROPD_RESTART_SLOW,
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"Failed to write log entries from master to disk");
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(void) kadm5_log_end(server_context);
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if (unlink(server_context->log_context.log_file) == -1) {
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krb5_err(context, IPROPD_FATAL, errno,
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"Failed to recover from failure to write log "
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"entries from master to disk");
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}
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ret2 = kadm5_log_init(server_context);
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if (ret2) {
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krb5_err(context, IPROPD_RESTART_SLOW, ret2,
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"Failed to initialize log to recover from "
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"failure to write log entries from master to disk");
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}
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return ret;
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}
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/*
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* All other errors we treat as fatal here. This includes, for
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* example, EIO and EPIPE (sorry, can't log to pipes nor sockets).
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*/
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krb5_err(context, IPROPD_FATAL, ret,
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"Failed to write log entries from master to disk");
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}
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static int
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receive_loop (krb5_context context,
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krb5_storage *sp,
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kadm5_server_context *server_context)
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{
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int ret;
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off_t left, right, off;
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uint32_t len, vers;
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if (verbose)
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krb5_warnx(context, "receiving diffs");
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/*
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* Seek to the first entry in the message from the master that is
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* past the current version of the local database.
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*/
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do {
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uint32_t timestamp;
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uint32_t op;
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if ((ret = krb5_ret_uint32(sp, &vers)) == HEIM_ERR_EOF) {
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krb5_warnx(context, "master sent no new iprop entries");
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return 0;
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}
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/*
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* TODO We could do more to validate the entries from the master
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* here. And we could use/reuse more kadm5_log_*() code here.
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*
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* Alternatively we should trust that the master sent us exactly
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* what we needed and just write this to the log file and let
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* kadm5_log_recover() do the rest.
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*/
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if (ret || krb5_ret_uint32(sp, ×tamp) != 0 ||
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krb5_ret_uint32(sp, &op) != 0 ||
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krb5_ret_uint32(sp, &len) != 0) {
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/*
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* This shouldn't happen. Reconnecting probably won't help
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* if it does happen, but by reconnecting we get a chance to
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* connect to a new master if a new one is configured.
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*/
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krb5_warnx(context, "iprop entries from master were truncated");
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return EINVAL;
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}
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if (vers > server_context->log_context.version) {
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break;
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}
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off = krb5_storage_seek(sp, 0, SEEK_CUR);
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if (krb5_storage_seek(sp, len + 8, SEEK_CUR) != off + len + 8) {
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krb5_warnx(context, "iprop entries from master were truncated");
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return EINVAL;
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}
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if (verbose) {
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krb5_warnx(context, "diff contains old log record version "
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"%u %lld %u length %u",
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vers, (long long)timestamp, op, len);
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}
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} while(vers <= server_context->log_context.version);
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/*
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* Read the remaining entries into memory...
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*/
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/* SEEK_CUR is a header into the first entry we care about */
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left = krb5_storage_seek(sp, -16, SEEK_CUR);
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right = krb5_storage_seek(sp, 0, SEEK_END);
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if (right - left < 24 + len) {
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krb5_warnx(context, "iprop entries from master were truncated");
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return EINVAL;
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}
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/*
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* ...and then write them out to the on-disk log.
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*/
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ret = append_to_log_file(context, server_context, sp, left, right - left);
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if (ret)
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return ret;
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/*
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* Replay the new entries.
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*/
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if (verbose)
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krb5_warnx(context, "replaying entries from master");
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ret = kadm5_log_recover(server_context, kadm_recover_replay);
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if (ret) {
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krb5_warn(context, ret, "replay failed");
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return ret;
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}
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ret = kadm5_log_get_version(server_context, &vers);
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if (ret) {
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krb5_warn(context, ret,
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"could not get log version after applying diffs!");
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return ret;
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}
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if (verbose)
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krb5_warnx(context, "slave at version %u", vers);
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if (vers != server_context->log_context.version) {
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krb5_warnx(context, "slave's log_context version (%u) is "
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"inconsistent with log's version (%u)",
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server_context->log_context.version, vers);
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}
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return 0;
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}
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static int
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receive(krb5_context context,
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krb5_storage *sp,
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kadm5_server_context *server_context)
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{
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krb5_error_code ret, ret2;
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ret = server_context->db->hdb_open(context,
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server_context->db,
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O_RDWR | O_CREAT, 0600);
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if (ret)
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krb5_err(context, IPROPD_RESTART_SLOW, ret, "db->open");
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ret2 = receive_loop(context, sp, server_context);
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if (ret2)
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krb5_warn(context, ret2, "receive from ipropd-master had errors");
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ret = server_context->db->hdb_close(context, server_context->db);
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if (ret)
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krb5_err(context, IPROPD_RESTART_SLOW, ret, "db->close");
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return ret2;
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}
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|
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static void
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send_im_here(krb5_context context, int fd,
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krb5_auth_context auth_context)
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{
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krb5_storage *sp;
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krb5_data data;
|
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krb5_error_code ret;
|
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|
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ret = krb5_data_alloc(&data, 4);
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if (ret)
|
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krb5_err(context, IPROPD_RESTART, ret, "send_im_here");
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sp = krb5_storage_from_data (&data);
|
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if (sp == NULL)
|
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krb5_errx(context, IPROPD_RESTART, "krb5_storage_from_data");
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ret = krb5_store_uint32(sp, I_AM_HERE);
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krb5_storage_free(sp);
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|
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if (ret == 0) {
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ret = krb5_write_priv_message(context, auth_context, &fd, &data);
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krb5_data_free(&data);
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if (ret)
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krb5_err(context, IPROPD_RESTART, ret, "krb5_write_priv_message");
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|
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if (verbose)
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krb5_warnx(context, "pinged master");
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}
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|
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return;
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}
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|
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static void
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reinit_log(krb5_context context,
|
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kadm5_server_context *server_context,
|
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uint32_t vno)
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{
|
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krb5_error_code ret;
|
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|
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if (verbose)
|
|
krb5_warnx(context, "truncating log on slave");
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|
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ret = kadm5_log_reinit(server_context, vno);
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if (ret)
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krb5_err(context, IPROPD_RESTART_SLOW, ret, "kadm5_log_reinit");
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}
|
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|
|
|
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static krb5_error_code
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receive_everything(krb5_context context, int fd,
|
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kadm5_server_context *server_context,
|
|
krb5_auth_context auth_context)
|
|
{
|
|
int ret;
|
|
krb5_data data;
|
|
uint32_t vno = 0;
|
|
uint32_t opcode;
|
|
krb5_storage *sp;
|
|
|
|
char *dbname;
|
|
HDB *mydb;
|
|
|
|
krb5_warnx(context, "receive complete database");
|
|
|
|
ret = asprintf(&dbname, "%s-NEW", server_context->db->hdb_name);
|
|
if (ret == -1)
|
|
krb5_err(context, IPROPD_RESTART, ENOMEM, "asprintf");
|
|
ret = hdb_create(context, &mydb, dbname);
|
|
if(ret)
|
|
krb5_err(context, IPROPD_RESTART, ret, "hdb_create");
|
|
free(dbname);
|
|
|
|
ret = hdb_set_master_keyfile(context,
|
|
mydb, server_context->config.stash_file);
|
|
if(ret)
|
|
krb5_err(context, IPROPD_RESTART, ret, "hdb_set_master_keyfile");
|
|
|
|
/* I really want to use O_EXCL here, but given that I can't easily clean
|
|
up on error, I won't */
|
|
ret = mydb->hdb_open(context, mydb, O_RDWR | O_CREAT | O_TRUNC, 0600);
|
|
if (ret)
|
|
krb5_err(context, IPROPD_RESTART, ret, "db->open");
|
|
|
|
(void) mydb->hdb_set_sync(context, mydb, 0);
|
|
|
|
sp = NULL;
|
|
krb5_data_zero(&data);
|
|
do {
|
|
ret = krb5_read_priv_message(context, auth_context, &fd, &data);
|
|
|
|
if (ret) {
|
|
krb5_warn(context, ret, "krb5_read_priv_message");
|
|
goto cleanup;
|
|
}
|
|
|
|
sp = krb5_storage_from_data(&data);
|
|
if (sp == NULL)
|
|
krb5_errx(context, IPROPD_RESTART, "krb5_storage_from_data");
|
|
krb5_ret_uint32(sp, &opcode);
|
|
if (opcode == ONE_PRINC) {
|
|
krb5_data fake_data;
|
|
hdb_entry_ex entry;
|
|
|
|
krb5_storage_free(sp);
|
|
|
|
fake_data.data = (char *)data.data + 4;
|
|
fake_data.length = data.length - 4;
|
|
|
|
memset(&entry, 0, sizeof(entry));
|
|
|
|
ret = hdb_value2entry(context, &fake_data, &entry.entry);
|
|
if (ret)
|
|
krb5_err(context, IPROPD_RESTART, ret, "hdb_value2entry");
|
|
ret = mydb->hdb_store(server_context->context,
|
|
mydb,
|
|
0, &entry);
|
|
if (ret)
|
|
krb5_err(context, IPROPD_RESTART_SLOW, ret, "hdb_store");
|
|
|
|
hdb_free_entry(context, &entry);
|
|
krb5_data_free(&data);
|
|
} else if (opcode == NOW_YOU_HAVE)
|
|
;
|
|
else
|
|
krb5_errx(context, 1, "strange opcode %d", opcode);
|
|
} while (opcode == ONE_PRINC);
|
|
|
|
if (opcode != NOW_YOU_HAVE)
|
|
krb5_errx(context, IPROPD_RESTART_SLOW,
|
|
"receive_everything: strange %d", opcode);
|
|
|
|
krb5_ret_uint32(sp, &vno);
|
|
krb5_storage_free(sp);
|
|
|
|
reinit_log(context, server_context, vno);
|
|
|
|
ret = mydb->hdb_set_sync(context, mydb, 1);
|
|
if (ret)
|
|
krb5_err(context, IPROPD_RESTART_SLOW, ret, "failed to sync the received HDB");
|
|
ret = mydb->hdb_close(context, mydb);
|
|
if (ret)
|
|
krb5_err(context, IPROPD_RESTART_SLOW, ret, "db->close");
|
|
|
|
ret = mydb->hdb_rename(context, mydb, server_context->db->hdb_name);
|
|
if (ret)
|
|
krb5_err(context, IPROPD_RESTART_SLOW, ret, "db->rename");
|
|
|
|
|
|
return 0;
|
|
|
|
cleanup:
|
|
krb5_data_free(&data);
|
|
|
|
if (ret)
|
|
krb5_err(context, IPROPD_RESTART_SLOW, ret, "db->close");
|
|
|
|
ret = mydb->hdb_destroy(context, mydb);
|
|
if (ret)
|
|
krb5_err(context, IPROPD_RESTART, ret, "db->destroy");
|
|
|
|
krb5_warnx(context, "receive complete database, version %ld", (long)vno);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
slave_status(krb5_context context,
|
|
const char *file,
|
|
const char *status, ...)
|
|
__attribute__ ((__format__ (__printf__, 3, 4)));
|
|
|
|
|
|
static void
|
|
slave_status(krb5_context context,
|
|
const char *file,
|
|
const char *fmt, ...)
|
|
{
|
|
char *status;
|
|
char *fmt2;
|
|
va_list args;
|
|
int len;
|
|
|
|
if (asprintf(&fmt2, "%s\n", fmt) == -1 || fmt2 == NULL) {
|
|
(void) unlink(file);
|
|
return;
|
|
}
|
|
va_start(args, fmt);
|
|
len = vasprintf(&status, fmt2, args);
|
|
free(fmt2);
|
|
va_end(args);
|
|
if (len < 0 || status == NULL) {
|
|
(void) unlink(file);
|
|
return;
|
|
}
|
|
krb5_warnx(context, "slave status change: %s", status);
|
|
|
|
rk_dumpdata(file, status, len);
|
|
free(status);
|
|
}
|
|
|
|
static void
|
|
is_up_to_date(krb5_context context, const char *file,
|
|
kadm5_server_context *server_context)
|
|
{
|
|
krb5_error_code ret;
|
|
char buf[80];
|
|
ret = krb5_format_time(context, time(NULL), buf, sizeof(buf), 1);
|
|
if (ret) {
|
|
unlink(file);
|
|
return;
|
|
}
|
|
slave_status(context, file, "up-to-date with version: %lu at %s",
|
|
(unsigned long)server_context->log_context.version, buf);
|
|
}
|
|
|
|
static char *status_file;
|
|
static char *config_file;
|
|
static char *realm;
|
|
static int version_flag;
|
|
static int help_flag;
|
|
static char *keytab_str;
|
|
static char *port_str;
|
|
static int detach_from_console;
|
|
static int daemon_child = -1;
|
|
|
|
static struct getargs args[] = {
|
|
{ "config-file", 'c', arg_string, &config_file, NULL, NULL },
|
|
{ "realm", 'r', arg_string, &realm, NULL, NULL },
|
|
{ "keytab", 'k', arg_string, &keytab_str,
|
|
"keytab to get authentication from", "kspec" },
|
|
{ "time-lost", 0, arg_string, &server_time_lost,
|
|
"time before server is considered lost", "time" },
|
|
{ "status-file", 0, arg_string, &status_file,
|
|
"file to write out status into", "file" },
|
|
{ "port", 0, arg_string, &port_str,
|
|
"port ipropd-slave will connect to", "port"},
|
|
{ "detach", 0, arg_flag, &detach_from_console,
|
|
"detach from console", NULL },
|
|
{ "daemon-child", 0 , arg_integer, &daemon_child,
|
|
"private argument, do not use", NULL },
|
|
{ "hostname", 0, arg_string, rk_UNCONST(&slave_str),
|
|
"hostname of slave (if not same as hostname)", "hostname" },
|
|
{ "verbose", 0, arg_flag, &verbose, NULL, NULL },
|
|
{ "version", 0, arg_flag, &version_flag, NULL, NULL },
|
|
{ "help", 0, arg_flag, &help_flag, NULL, NULL }
|
|
};
|
|
|
|
static int num_args = sizeof(args) / sizeof(args[0]);
|
|
|
|
static void
|
|
usage(int status)
|
|
{
|
|
arg_printusage(args, num_args, NULL, "master");
|
|
exit(status);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
krb5_error_code ret, ret2;
|
|
krb5_context context;
|
|
krb5_auth_context auth_context;
|
|
void *kadm_handle;
|
|
kadm5_server_context *server_context;
|
|
kadm5_config_params conf;
|
|
int master_fd;
|
|
krb5_ccache ccache;
|
|
krb5_principal server;
|
|
char **files;
|
|
int optidx = 0;
|
|
time_t reconnect_min;
|
|
time_t backoff;
|
|
time_t reconnect_max;
|
|
time_t reconnect;
|
|
time_t before = 0;
|
|
int restarter_fd = -1;
|
|
|
|
const char *master;
|
|
|
|
setprogname(argv[0]);
|
|
|
|
if (getarg(args, num_args, argc, argv, &optidx))
|
|
usage(1);
|
|
|
|
if (help_flag)
|
|
usage(0);
|
|
|
|
if (version_flag) {
|
|
print_version(NULL);
|
|
exit(0);
|
|
}
|
|
|
|
if (detach_from_console && daemon_child == -1)
|
|
daemon_child = roken_detach_prep(argc, argv, "--daemon-child");
|
|
rk_pidfile(NULL);
|
|
|
|
ret = krb5_init_context(&context);
|
|
if (ret)
|
|
errx (1, "krb5_init_context failed: %d", ret);
|
|
|
|
setup_signal();
|
|
|
|
if (config_file == NULL) {
|
|
if (asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context)) == -1
|
|
|| config_file == NULL)
|
|
errx(1, "out of memory");
|
|
}
|
|
|
|
ret = krb5_prepend_config_files_default(config_file, &files);
|
|
if (ret)
|
|
krb5_err(context, 1, ret, "getting configuration files");
|
|
|
|
ret = krb5_set_config_files(context, files);
|
|
krb5_free_config_files(files);
|
|
if (ret)
|
|
krb5_err(context, 1, ret, "reading configuration files");
|
|
|
|
argc -= optidx;
|
|
argv += optidx;
|
|
|
|
if (argc != 1)
|
|
usage(1);
|
|
|
|
master = argv[0];
|
|
|
|
if (status_file == NULL) {
|
|
if (asprintf(&status_file, "%s/ipropd-slave-status", hdb_db_dir(context)) < 0 || status_file == NULL)
|
|
krb5_errx(context, 1, "can't allocate status file buffer");
|
|
}
|
|
|
|
krb5_openlog(context, "ipropd-slave", &log_facility);
|
|
krb5_set_warn_dest(context, log_facility);
|
|
|
|
slave_status(context, status_file, "bootstrapping");
|
|
|
|
ret = krb5_kt_register(context, &hdb_get_kt_ops);
|
|
if(ret)
|
|
krb5_err(context, 1, ret, "krb5_kt_register");
|
|
|
|
time_before_lost = parse_time (server_time_lost, "s");
|
|
if (time_before_lost < 0)
|
|
krb5_errx (context, 1, "couldn't parse time: %s", server_time_lost);
|
|
|
|
slave_status(context, status_file, "getting credentials from keytab/database");
|
|
|
|
memset(&conf, 0, sizeof(conf));
|
|
if(realm) {
|
|
conf.mask |= KADM5_CONFIG_REALM;
|
|
conf.realm = realm;
|
|
}
|
|
ret = kadm5_init_with_password_ctx (context,
|
|
KADM5_ADMIN_SERVICE,
|
|
NULL,
|
|
KADM5_ADMIN_SERVICE,
|
|
&conf, 0, 0,
|
|
&kadm_handle);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "kadm5_init_with_password_ctx");
|
|
|
|
server_context = (kadm5_server_context *)kadm_handle;
|
|
|
|
slave_status(context, status_file, "creating log file");
|
|
|
|
ret = server_context->db->hdb_open(context,
|
|
server_context->db,
|
|
O_RDWR | O_CREAT, 0600);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "db->open");
|
|
|
|
ret = kadm5_log_init (server_context);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "kadm5_log_init");
|
|
|
|
ret = server_context->db->hdb_close (context, server_context->db);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "db->close");
|
|
|
|
get_creds(context, keytab_str, &ccache, master);
|
|
|
|
ret = krb5_sname_to_principal (context, master, IPROP_NAME,
|
|
KRB5_NT_SRV_HST, &server);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "krb5_sname_to_principal");
|
|
|
|
auth_context = NULL;
|
|
master_fd = -1;
|
|
|
|
krb5_appdefault_time(context, config_name, NULL, "reconnect-min",
|
|
10, &reconnect_min);
|
|
krb5_appdefault_time(context, config_name, NULL, "reconnect-max",
|
|
300, &reconnect_max);
|
|
krb5_appdefault_time(context, config_name, NULL, "reconnect-backoff",
|
|
10, &backoff);
|
|
reconnect = reconnect_min;
|
|
|
|
slave_status(context, status_file, "ipropd-slave started");
|
|
|
|
roken_detach_finish(NULL, daemon_child);
|
|
restarter_fd = restarter(context, NULL);
|
|
|
|
while (!exit_flag) {
|
|
struct timeval to;
|
|
time_t now, elapsed;
|
|
fd_set readset;
|
|
int connected = FALSE;
|
|
|
|
#ifndef NO_LIMIT_FD_SETSIZE
|
|
if (restarter_fd >= FD_SETSIZE)
|
|
krb5_errx(context, IPROPD_RESTART, "fd too large");
|
|
#endif
|
|
|
|
FD_ZERO(&readset);
|
|
if (restarter_fd > -1)
|
|
FD_SET(restarter_fd, &readset);
|
|
|
|
now = time(NULL);
|
|
elapsed = now - before;
|
|
|
|
if (elapsed < reconnect) {
|
|
time_t left = reconnect - elapsed;
|
|
krb5_warnx(context, "sleeping %d seconds before "
|
|
"retrying to connect", (int)left);
|
|
to.tv_sec = left;
|
|
to.tv_usec = 0;
|
|
if (select(restarter_fd + 1, &readset, NULL, NULL, &to) == 1) {
|
|
exit_flag = SIGTERM;
|
|
continue;
|
|
}
|
|
}
|
|
before = now;
|
|
|
|
slave_status(context, status_file, "connecting to master: %s\n", master);
|
|
|
|
master_fd = connect_to_master (context, master, port_str);
|
|
if (master_fd < 0)
|
|
goto retry;
|
|
|
|
reconnect = reconnect_min;
|
|
|
|
if (auth_context) {
|
|
krb5_auth_con_free(context, auth_context);
|
|
auth_context = NULL;
|
|
krb5_cc_destroy(context, ccache);
|
|
get_creds(context, keytab_str, &ccache, master);
|
|
}
|
|
if (verbose)
|
|
krb5_warnx(context, "authenticating to master");
|
|
ret = krb5_sendauth (context, &auth_context, &master_fd,
|
|
IPROP_VERSION, NULL, server,
|
|
AP_OPTS_MUTUAL_REQUIRED, NULL, NULL,
|
|
ccache, NULL, NULL, NULL);
|
|
if (ret) {
|
|
krb5_warn (context, ret, "krb5_sendauth");
|
|
goto retry;
|
|
}
|
|
|
|
krb5_warnx(context, "ipropd-slave started at version: %ld",
|
|
(long)server_context->log_context.version);
|
|
|
|
ret = ihave(context, auth_context, master_fd,
|
|
server_context->log_context.version);
|
|
if (ret)
|
|
goto retry;
|
|
|
|
connected = TRUE;
|
|
|
|
if (verbose)
|
|
krb5_warnx(context, "connected to master");
|
|
|
|
slave_status(context, status_file, "connected to master, waiting instructions");
|
|
|
|
while (connected && !exit_flag) {
|
|
krb5_data out;
|
|
krb5_storage *sp;
|
|
uint32_t tmp;
|
|
int max_fd;
|
|
|
|
#ifndef NO_LIMIT_FD_SETSIZE
|
|
if (master_fd >= FD_SETSIZE)
|
|
krb5_errx(context, IPROPD_RESTART, "fd too large");
|
|
if (restarter_fd >= FD_SETSIZE)
|
|
krb5_errx(context, IPROPD_RESTART, "fd too large");
|
|
max_fd = max(restarter_fd, master_fd);
|
|
#endif
|
|
|
|
FD_ZERO(&readset);
|
|
FD_SET(master_fd, &readset);
|
|
if (restarter_fd != -1)
|
|
FD_SET(restarter_fd, &readset);
|
|
|
|
to.tv_sec = time_before_lost;
|
|
to.tv_usec = 0;
|
|
|
|
ret = select (max_fd + 1,
|
|
&readset, NULL, NULL, &to);
|
|
if (ret < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
else
|
|
krb5_err (context, 1, errno, "select");
|
|
}
|
|
if (ret == 0) {
|
|
krb5_warnx(context, "server didn't send a message "
|
|
"in %d seconds", time_before_lost);
|
|
connected = FALSE;
|
|
continue;
|
|
}
|
|
|
|
if (restarter_fd > -1 && FD_ISSET(restarter_fd, &readset)) {
|
|
if (verbose)
|
|
krb5_warnx(context, "slave restarter exited");
|
|
exit_flag = SIGTERM;
|
|
}
|
|
|
|
if (!FD_ISSET(master_fd, &readset))
|
|
continue;
|
|
|
|
if (verbose)
|
|
krb5_warnx(context, "message from master");
|
|
|
|
ret = krb5_read_priv_message(context, auth_context, &master_fd, &out);
|
|
if (ret) {
|
|
krb5_warn(context, ret, "krb5_read_priv_message");
|
|
connected = FALSE;
|
|
continue;
|
|
}
|
|
|
|
sp = krb5_storage_from_mem (out.data, out.length);
|
|
if (sp == NULL)
|
|
krb5_err(context, IPROPD_RESTART, errno, "krb5_storage_from_mem");
|
|
ret = krb5_ret_uint32(sp, &tmp);
|
|
if (ret == HEIM_ERR_EOF) {
|
|
krb5_warn(context, ret, "master sent zero-length message");
|
|
connected = FALSE;
|
|
continue;
|
|
}
|
|
if (ret != 0) {
|
|
krb5_warn(context, ret, "couldn't read master's message");
|
|
connected = FALSE;
|
|
continue;
|
|
}
|
|
|
|
ret = server_context->db->hdb_open(context,
|
|
server_context->db,
|
|
O_RDWR | O_CREAT, 0600);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "db->open while handling a "
|
|
"message from the master");
|
|
|
|
ret = kadm5_log_init(server_context);
|
|
if (ret) {
|
|
krb5_err(context, IPROPD_RESTART, ret, "kadm5_log_init while "
|
|
"handling a message from the master");
|
|
}
|
|
ret = server_context->db->hdb_close (context, server_context->db);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "db->close while handling a "
|
|
"message from the master");
|
|
|
|
switch (tmp) {
|
|
case FOR_YOU :
|
|
if (verbose)
|
|
krb5_warnx(context, "master sent us diffs");
|
|
ret2 = receive(context, sp, server_context);
|
|
if (ret2)
|
|
krb5_warn(context, ret2,
|
|
"receive from ipropd-master had errors");
|
|
ret = ihave(context, auth_context, master_fd,
|
|
server_context->log_context.version);
|
|
if (ret || ret2)
|
|
connected = FALSE;
|
|
|
|
/*
|
|
* If it returns an error, receive() may nonetheless
|
|
* have committed some entries successfully, so we must
|
|
* update the slave_status even if there were errors.
|
|
*/
|
|
is_up_to_date(context, status_file, server_context);
|
|
break;
|
|
case TELL_YOU_EVERYTHING :
|
|
if (verbose)
|
|
krb5_warnx(context, "master sent us a full dump");
|
|
ret = receive_everything(context, master_fd, server_context,
|
|
auth_context);
|
|
if (ret == 0) {
|
|
ret = ihave(context, auth_context, master_fd,
|
|
server_context->log_context.version);
|
|
}
|
|
if (ret)
|
|
connected = FALSE;
|
|
else
|
|
is_up_to_date(context, status_file, server_context);
|
|
break;
|
|
case ARE_YOU_THERE :
|
|
if (verbose)
|
|
krb5_warnx(context, "master sent us a ping");
|
|
is_up_to_date(context, status_file, server_context);
|
|
/*
|
|
* We used to send an I_HAVE here. But the master may send
|
|
* ARE_YOU_THERE messages in response to local, possibly-
|
|
* transient errors, and if that happens and we respond with an
|
|
* I_HAVE then we'll loop hard if the error was not transient.
|
|
*
|
|
* So we don't ihave() here.
|
|
*/
|
|
send_im_here(context, master_fd, auth_context);
|
|
break;
|
|
case YOU_HAVE_LAST_VERSION:
|
|
if (verbose)
|
|
krb5_warnx(context, "master tells us we are up to date");
|
|
is_up_to_date(context, status_file, server_context);
|
|
break;
|
|
case NOW_YOU_HAVE :
|
|
case I_HAVE :
|
|
case ONE_PRINC :
|
|
case I_AM_HERE :
|
|
default :
|
|
krb5_warnx (context, "Ignoring command %d", tmp);
|
|
break;
|
|
}
|
|
krb5_storage_free (sp);
|
|
krb5_data_free (&out);
|
|
|
|
}
|
|
|
|
slave_status(context, status_file, "disconnected from master");
|
|
retry:
|
|
if (connected == FALSE)
|
|
krb5_warnx (context, "disconnected for server");
|
|
|
|
if (exit_flag)
|
|
krb5_warnx (context, "got an exit signal");
|
|
|
|
if (master_fd >= 0)
|
|
close(master_fd);
|
|
|
|
reconnect += backoff;
|
|
if (reconnect > reconnect_max) {
|
|
slave_status(context, status_file, "disconnected from master for a long time");
|
|
reconnect = reconnect_max;
|
|
}
|
|
}
|
|
|
|
if (status_file) {
|
|
/* XXX It'd be better to leave it saying we're not here */
|
|
unlink(status_file);
|
|
}
|
|
|
|
if (0);
|
|
#ifndef NO_SIGXCPU
|
|
else if(exit_flag == SIGXCPU)
|
|
krb5_warnx(context, "%s CPU time limit exceeded", getprogname());
|
|
#endif
|
|
else if(exit_flag == SIGINT || exit_flag == SIGTERM)
|
|
krb5_warnx(context, "%s terminated", getprogname());
|
|
else
|
|
krb5_warnx(context, "%s unexpected exit reason: %ld",
|
|
getprogname(), (long)exit_flag);
|
|
|
|
return 0;
|
|
}
|