diff options
Diffstat (limited to 'lib/kadm5/ipropd_master.c')
| -rw-r--r-- | lib/kadm5/ipropd_master.c | 937 |
1 files changed, 937 insertions, 0 deletions
diff --git a/lib/kadm5/ipropd_master.c b/lib/kadm5/ipropd_master.c new file mode 100644 index 0000000..bd8f71f --- /dev/null +++ b/lib/kadm5/ipropd_master.c @@ -0,0 +1,937 @@ +/* + * Copyright (c) 1997 - 2007 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "iprop.h" +#include <rtbl.h> + +RCSID("$Id: ipropd_master.c 22211 2007-12-07 19:27:27Z lha $"); + +static krb5_log_facility *log_facility; + +const char *slave_stats_file; +const char *slave_time_missing = "2 min"; +const char *slave_time_gone = "5 min"; + +static int time_before_missing; +static int time_before_gone; + +const char *master_hostname; + +static int +make_signal_socket (krb5_context context) +{ + struct sockaddr_un addr; + const char *fn; + int fd; + + fn = kadm5_log_signal_socket(context); + + fd = socket (AF_UNIX, SOCK_DGRAM, 0); + if (fd < 0) + krb5_err (context, 1, errno, "socket AF_UNIX"); + memset (&addr, 0, sizeof(addr)); + addr.sun_family = AF_UNIX; + strlcpy (addr.sun_path, fn, sizeof(addr.sun_path)); + unlink (addr.sun_path); + if (bind (fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) + krb5_err (context, 1, errno, "bind %s", addr.sun_path); + return fd; +} + +static int +make_listen_socket (krb5_context context, const char *port_str) +{ + int fd; + int one = 1; + struct sockaddr_in addr; + + fd = socket (AF_INET, SOCK_STREAM, 0); + if (fd < 0) + krb5_err (context, 1, errno, "socket AF_INET"); + setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(one)); + memset (&addr, 0, sizeof(addr)); + addr.sin_family = AF_INET; + + if (port_str) { + addr.sin_port = krb5_getportbyname (context, + port_str, "tcp", + 0); + if (addr.sin_port == 0) { + char *ptr; + long port; + + port = strtol (port_str, &ptr, 10); + if (port == 0 && ptr == port_str) + krb5_errx (context, 1, "bad port `%s'", port_str); + addr.sin_port = htons(port); + } + } else { + addr.sin_port = krb5_getportbyname (context, IPROP_SERVICE, + "tcp", IPROP_PORT); + } + if(bind(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) + krb5_err (context, 1, errno, "bind"); + if (listen(fd, SOMAXCONN) < 0) + krb5_err (context, 1, errno, "listen"); + return fd; +} + +struct slave { + int fd; + struct sockaddr_in addr; + char *name; + krb5_auth_context ac; + uint32_t version; + time_t seen; + unsigned long flags; +#define SLAVE_F_DEAD 0x1 +#define SLAVE_F_AYT 0x2 + struct slave *next; +}; + +typedef struct slave slave; + +static int +check_acl (krb5_context context, const char *name) +{ + const char *fn; + FILE *fp; + char buf[256]; + int ret = 1; + char *slavefile; + + asprintf(&slavefile, "%s/slaves", hdb_db_dir(context)); + + fn = krb5_config_get_string_default(context, + NULL, + slavefile, + "kdc", + "iprop-acl", + NULL); + + fp = fopen (fn, "r"); + free(slavefile); + if (fp == NULL) + return 1; + while (fgets(buf, sizeof(buf), fp) != NULL) { + buf[strcspn(buf, "\r\n")] = '\0'; + if (strcmp (buf, name) == 0) { + ret = 0; + break; + } + } + fclose (fp); + return ret; +} + +static void +slave_seen(slave *s) +{ + s->flags &= ~SLAVE_F_AYT; + s->seen = time(NULL); +} + +static int +slave_missing_p (slave *s) +{ + if (time(NULL) > s->seen + time_before_missing) + return 1; + return 0; +} + +static int +slave_gone_p (slave *s) +{ + if (time(NULL) > s->seen + time_before_gone) + return 1; + return 0; +} + +static void +slave_dead(krb5_context context, slave *s) +{ + krb5_warnx(context, "slave %s dead", s->name); + + if (s->fd >= 0) { + close (s->fd); + s->fd = -1; + } + s->flags |= SLAVE_F_DEAD; + slave_seen(s); +} + +static void +remove_slave (krb5_context context, slave *s, slave **root) +{ + slave **p; + + if (s->fd >= 0) + close (s->fd); + if (s->name) + free (s->name); + if (s->ac) + krb5_auth_con_free (context, s->ac); + + for (p = root; *p; p = &(*p)->next) + if (*p == s) { + *p = s->next; + break; + } + free (s); +} + +static void +add_slave (krb5_context context, krb5_keytab keytab, slave **root, int fd) +{ + krb5_principal server; + krb5_error_code ret; + slave *s; + socklen_t addr_len; + krb5_ticket *ticket = NULL; + char hostname[128]; + + s = malloc(sizeof(*s)); + if (s == NULL) { + krb5_warnx (context, "add_slave: no memory"); + return; + } + s->name = NULL; + s->ac = NULL; + + addr_len = sizeof(s->addr); + s->fd = accept (fd, (struct sockaddr *)&s->addr, &addr_len); + if (s->fd < 0) { + krb5_warn (context, errno, "accept"); + goto error; + } + if (master_hostname) + strlcpy(hostname, master_hostname, sizeof(hostname)); + else + gethostname(hostname, sizeof(hostname)); + + ret = krb5_sname_to_principal (context, hostname, IPROP_NAME, + KRB5_NT_SRV_HST, &server); + if (ret) { + krb5_warn (context, ret, "krb5_sname_to_principal"); + goto error; + } + + ret = krb5_recvauth (context, &s->ac, &s->fd, + IPROP_VERSION, server, 0, keytab, &ticket); + krb5_free_principal (context, server); + if (ret) { + krb5_warn (context, ret, "krb5_recvauth"); + goto error; + } + ret = krb5_unparse_name (context, ticket->client, &s->name); + if (ret) { + krb5_warn (context, ret, "krb5_unparse_name"); + goto error; + } + if (check_acl (context, s->name)) { + krb5_warnx (context, "%s not in acl", s->name); + goto error; + } + krb5_free_ticket (context, ticket); + ticket = NULL; + + { + slave *l = *root; + + while (l) { + if (strcmp(l->name, s->name) == 0) + break; + l = l->next; + } + if (l) { + if (l->flags & SLAVE_F_DEAD) { + remove_slave(context, l, root); + } else { + krb5_warnx (context, "second connection from %s", s->name); + goto error; + } + } + } + + krb5_warnx (context, "connection from %s", s->name); + + s->version = 0; + s->flags = 0; + slave_seen(s); + s->next = *root; + *root = s; + return; +error: + remove_slave(context, s, root); +} + +struct prop_context { + krb5_auth_context auth_context; + int fd; +}; + +static int +prop_one (krb5_context context, HDB *db, hdb_entry_ex *entry, void *v) +{ + krb5_error_code ret; + krb5_storage *sp; + krb5_data data; + struct slave *s = (struct slave *)v; + + ret = hdb_entry2value (context, &entry->entry, &data); + if (ret) + return ret; + ret = krb5_data_realloc (&data, data.length + 4); + if (ret) { + krb5_data_free (&data); + return ret; + } + memmove ((char *)data.data + 4, data.data, data.length - 4); + sp = krb5_storage_from_data(&data); + if (sp == NULL) { + krb5_data_free (&data); + return ENOMEM; + } + krb5_store_int32(sp, ONE_PRINC); + krb5_storage_free(sp); + + ret = krb5_write_priv_message (context, s->ac, &s->fd, &data); + krb5_data_free (&data); + return ret; +} + +static int +send_complete (krb5_context context, slave *s, + const char *database, uint32_t current_version) +{ + krb5_error_code ret; + krb5_storage *sp; + HDB *db; + krb5_data data; + char buf[8]; + + ret = hdb_create (context, &db, database); + if (ret) + krb5_err (context, 1, ret, "hdb_create: %s", database); + ret = db->hdb_open (context, db, O_RDONLY, 0); + if (ret) + krb5_err (context, 1, ret, "db->open"); + + sp = krb5_storage_from_mem (buf, 4); + if (sp == NULL) + krb5_errx (context, 1, "krb5_storage_from_mem"); + krb5_store_int32 (sp, TELL_YOU_EVERYTHING); + krb5_storage_free (sp); + + data.data = buf; + data.length = 4; + + ret = krb5_write_priv_message(context, s->ac, &s->fd, &data); + + if (ret) { + krb5_warn (context, ret, "krb5_write_priv_message"); + slave_dead(context, s); + return ret; + } + + ret = hdb_foreach (context, db, 0, prop_one, s); + if (ret) { + krb5_warn (context, ret, "hdb_foreach"); + slave_dead(context, s); + return ret; + } + + (*db->hdb_close)(context, db); + (*db->hdb_destroy)(context, db); + + sp = krb5_storage_from_mem (buf, 8); + if (sp == NULL) + krb5_errx (context, 1, "krb5_storage_from_mem"); + krb5_store_int32 (sp, NOW_YOU_HAVE); + krb5_store_int32 (sp, current_version); + krb5_storage_free (sp); + + data.length = 8; + + s->version = current_version; + + ret = krb5_write_priv_message(context, s->ac, &s->fd, &data); + if (ret) { + slave_dead(context, s); + krb5_warn (context, ret, "krb5_write_priv_message"); + return ret; + } + + slave_seen(s); + + return 0; +} + +static int +send_are_you_there (krb5_context context, slave *s) +{ + krb5_storage *sp; + krb5_data data; + char buf[4]; + int ret; + + if (s->flags & (SLAVE_F_DEAD|SLAVE_F_AYT)) + return 0; + + s->flags |= SLAVE_F_AYT; + + data.data = buf; + data.length = 4; + + sp = krb5_storage_from_mem (buf, 4); + if (sp == NULL) { + krb5_warnx (context, "are_you_there: krb5_data_alloc"); + slave_dead(context, s); + return 1; + } + krb5_store_int32 (sp, ARE_YOU_THERE); + krb5_storage_free (sp); + + ret = krb5_write_priv_message(context, s->ac, &s->fd, &data); + + if (ret) { + krb5_warn (context, ret, "are_you_there: krb5_write_priv_message"); + slave_dead(context, s); + return 1; + } + + return 0; +} + +static int +send_diffs (krb5_context context, slave *s, int log_fd, + const char *database, uint32_t current_version) +{ + krb5_storage *sp; + uint32_t ver; + time_t timestamp; + enum kadm_ops op; + uint32_t len; + off_t right, left; + krb5_data data; + int ret = 0; + + if (s->version == current_version) { + krb5_warnx(context, "slave %s in sync already at version %ld", + s->name, (long)s->version); + return 0; + } + + if (s->flags & SLAVE_F_DEAD) + return 0; + + /* if slave is a fresh client, starting over */ + if (s->version == 0) { + krb5_warnx(context, "sending complete log to fresh slave %s", + s->name); + return send_complete (context, s, database, current_version); + } + + sp = kadm5_log_goto_end (log_fd); + right = krb5_storage_seek(sp, 0, SEEK_CUR); + for (;;) { + ret = kadm5_log_previous (context, sp, &ver, ×tamp, &op, &len); + if (ret) + krb5_err(context, 1, ret, + "send_diffs: failed to find previous entry"); + left = krb5_storage_seek(sp, -16, SEEK_CUR); + if (ver == s->version) + return 0; + if (ver == s->version + 1) + break; + if (left == 0) { + krb5_warnx(context, + "slave %s (version %lu) out of sync with master " + "(first version in log %lu), sending complete database", + s->name, (unsigned long)s->version, (unsigned long)ver); + return send_complete (context, s, database, current_version); + } + } + + krb5_warnx(context, + "syncing slave %s from version %lu to version %lu", + s->name, (unsigned long)s->version, + (unsigned long)current_version); + + ret = krb5_data_alloc (&data, right - left + 4); + if (ret) { + krb5_warn (context, ret, "send_diffs: krb5_data_alloc"); + slave_dead(context, s); + return 1; + } + krb5_storage_read (sp, (char *)data.data + 4, data.length - 4); + krb5_storage_free(sp); + + sp = krb5_storage_from_data (&data); + if (sp == NULL) { + krb5_warnx (context, "send_diffs: krb5_storage_from_data"); + slave_dead(context, s); + return 1; + } + krb5_store_int32 (sp, FOR_YOU); + krb5_storage_free(sp); + + ret = krb5_write_priv_message(context, s->ac, &s->fd, &data); + krb5_data_free(&data); + + if (ret) { + krb5_warn (context, ret, "send_diffs: krb5_write_priv_message"); + slave_dead(context, s); + return 1; + } + slave_seen(s); + + s->version = current_version; + + return 0; +} + +static int +process_msg (krb5_context context, slave *s, int log_fd, + const char *database, uint32_t current_version) +{ + int ret = 0; + krb5_data out; + krb5_storage *sp; + int32_t tmp; + + ret = krb5_read_priv_message(context, s->ac, &s->fd, &out); + if(ret) { + krb5_warn (context, ret, "error reading message from %s", s->name); + return 1; + } + + sp = krb5_storage_from_mem (out.data, out.length); + if (sp == NULL) { + krb5_warnx (context, "process_msg: no memory"); + krb5_data_free (&out); + return 1; + } + if (krb5_ret_int32 (sp, &tmp) != 0) { + krb5_warnx (context, "process_msg: client send too short command"); + krb5_data_free (&out); + return 1; + } + switch (tmp) { + case I_HAVE : + ret = krb5_ret_int32 (sp, &tmp); + if (ret != 0) { + krb5_warnx (context, "process_msg: client send too I_HAVE data"); + break; + } + /* new started slave that have old log */ + if (s->version == 0 && tmp != 0) { + if (s->version < tmp) { + krb5_warnx (context, "Slave %s have later version the master " + "OUT OF SYNC", s->name); + } else { + s->version = tmp; + } + } + if (tmp < s->version) { + krb5_warnx (context, "Slave claims to not have " + "version we already sent to it"); + } else { + ret = send_diffs (context, s, log_fd, database, current_version); + } + break; + case I_AM_HERE : + break; + case ARE_YOU_THERE: + case FOR_YOU : + default : + krb5_warnx (context, "Ignoring command %d", tmp); + break; + } + + krb5_data_free (&out); + + slave_seen(s); + + return ret; +} + +#define SLAVE_NAME "Name" +#define SLAVE_ADDRESS "Address" +#define SLAVE_VERSION "Version" +#define SLAVE_STATUS "Status" +#define SLAVE_SEEN "Last Seen" + +static FILE * +open_stats(krb5_context context) +{ + char *statfile = NULL; + const char *fn; + FILE *f; + + if (slave_stats_file) + fn = slave_stats_file; + else { + asprintf(&statfile, "%s/slaves-stats", hdb_db_dir(context)); + fn = krb5_config_get_string_default(context, + NULL, + statfile, + "kdc", + "iprop-stats", + NULL); + } + f = fopen(fn, "w"); + if (statfile) + free(statfile); + + return f; +} + +static void +write_master_down(krb5_context context) +{ + char str[100]; + time_t t = time(NULL); + FILE *fp; + + fp = open_stats(context); + if (fp == NULL) + return; + krb5_format_time(context, t, str, sizeof(str), TRUE); + fprintf(fp, "master down at %s\n", str); + + fclose(fp); +} + +static void +write_stats(krb5_context context, slave *slaves, uint32_t current_version) +{ + char str[100]; + rtbl_t tbl; + time_t t = time(NULL); + FILE *fp; + + fp = open_stats(context); + if (fp == NULL) + return; + + krb5_format_time(context, t, str, sizeof(str), TRUE); + fprintf(fp, "Status for slaves, last updated: %s\n\n", str); + + fprintf(fp, "Master version: %lu\n\n", (unsigned long)current_version); + + tbl = rtbl_create(); + if (tbl == NULL) { + fclose(fp); + return; + } + + rtbl_add_column(tbl, SLAVE_NAME, 0); + rtbl_add_column(tbl, SLAVE_ADDRESS, 0); + rtbl_add_column(tbl, SLAVE_VERSION, RTBL_ALIGN_RIGHT); + rtbl_add_column(tbl, SLAVE_STATUS, 0); + rtbl_add_column(tbl, SLAVE_SEEN, 0); + + rtbl_set_prefix(tbl, " "); + rtbl_set_column_prefix(tbl, SLAVE_NAME, ""); + + while (slaves) { + krb5_address addr; + krb5_error_code ret; + rtbl_add_column_entry(tbl, SLAVE_NAME, slaves->name); + ret = krb5_sockaddr2address (context, + (struct sockaddr*)&slaves->addr, &addr); + if(ret == 0) { + krb5_print_address(&addr, str, sizeof(str), NULL); + krb5_free_address(context, &addr); + rtbl_add_column_entry(tbl, SLAVE_ADDRESS, str); + } else + rtbl_add_column_entry(tbl, SLAVE_ADDRESS, "<unknown>"); + + snprintf(str, sizeof(str), "%u", (unsigned)slaves->version); + rtbl_add_column_entry(tbl, SLAVE_VERSION, str); + + if (slaves->flags & SLAVE_F_DEAD) + rtbl_add_column_entry(tbl, SLAVE_STATUS, "Down"); + else + rtbl_add_column_entry(tbl, SLAVE_STATUS, "Up"); + + ret = krb5_format_time(context, slaves->seen, str, sizeof(str), TRUE); + rtbl_add_column_entry(tbl, SLAVE_SEEN, str); + + slaves = slaves->next; + } + + rtbl_format(tbl, fp); + rtbl_destroy(tbl); + + fclose(fp); +} + + +static char *realm; +static int version_flag; +static int help_flag; +static char *keytab_str = "HDB:"; +static char *database; +static char *config_file; +static char *port_str; +static int detach_from_console = 0; + +static struct getargs args[] = { + { "config-file", 'c', arg_string, &config_file }, + { "realm", 'r', arg_string, &realm }, + { "keytab", 'k', arg_string, &keytab_str, + "keytab to get authentication from", "kspec" }, + { "database", 'd', arg_string, &database, "database", "file"}, + { "slave-stats-file", 0, arg_string, &slave_stats_file, + "file for slave status information", "file"}, + { "time-missing", 0, arg_string, &slave_time_missing, + "time before slave is polled for presence", "time"}, + { "time-gone", 0, arg_string, &slave_time_gone, + "time of inactivity after which a slave is considered gone", "time"}, + { "port", 0, arg_string, &port_str, + "port ipropd will listen to", "port"}, + { "detach", 0, arg_flag, &detach_from_console, + "detach from console" }, + { "hostname", 0, arg_string, &master_hostname, + "hostname of master (if not same as hostname)", "hostname" }, + { "version", 0, arg_flag, &version_flag }, + { "help", 0, arg_flag, &help_flag } +}; +static int num_args = sizeof(args) / sizeof(args[0]); + +int +main(int argc, char **argv) +{ + krb5_error_code ret; + krb5_context context; + void *kadm_handle; + kadm5_server_context *server_context; + kadm5_config_params conf; + int signal_fd, listen_fd; + int log_fd; + slave *slaves = NULL; + uint32_t current_version = 0, old_version = 0; + krb5_keytab keytab; + int optidx; + char **files; + + optidx = krb5_program_setup(&context, argc, argv, args, num_args, NULL); + + if(help_flag) + krb5_std_usage(0, args, num_args); + if(version_flag) { + print_version(NULL); + exit(0); + } + + setup_signal(); + + if (config_file == NULL) { + asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context)); + if (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"); + + time_before_gone = parse_time (slave_time_gone, "s"); + if (time_before_gone < 0) + krb5_errx (context, 1, "couldn't parse time: %s", slave_time_gone); + time_before_missing = parse_time (slave_time_missing, "s"); + if (time_before_missing < 0) + krb5_errx (context, 1, "couldn't parse time: %s", slave_time_missing); + + if (detach_from_console) + daemon(0, 0); + pidfile (NULL); + krb5_openlog (context, "ipropd-master", &log_facility); + krb5_set_warn_dest(context, log_facility); + + ret = krb5_kt_register(context, &hdb_kt_ops); + if(ret) + krb5_err(context, 1, ret, "krb5_kt_register"); + + ret = krb5_kt_resolve(context, keytab_str, &keytab); + if(ret) + krb5_err(context, 1, ret, "krb5_kt_resolve: %s", keytab_str); + + memset(&conf, 0, sizeof(conf)); + if(realm) { + conf.mask |= KADM5_CONFIG_REALM; + conf.realm = realm; + } + ret = kadm5_init_with_skey_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; + + log_fd = open (server_context->log_context.log_file, O_RDONLY, 0); + if (log_fd < 0) + krb5_err (context, 1, errno, "open %s", + server_context->log_context.log_file); + + signal_fd = make_signal_socket (context); + listen_fd = make_listen_socket (context, port_str); + + kadm5_log_get_version_fd (log_fd, ¤t_version); + + krb5_warnx(context, "ipropd-master started at version: %lu", + (unsigned long)current_version); + + while(exit_flag == 0){ + slave *p; + fd_set readset; + int max_fd = 0; + struct timeval to = {30, 0}; + uint32_t vers; + + if (signal_fd >= FD_SETSIZE || listen_fd >= FD_SETSIZE) + krb5_errx (context, 1, "fd too large"); + + FD_ZERO(&readset); + FD_SET(signal_fd, &readset); + max_fd = max(max_fd, signal_fd); + FD_SET(listen_fd, &readset); + max_fd = max(max_fd, listen_fd); + + for (p = slaves; p != NULL; p = p->next) { + if (p->flags & SLAVE_F_DEAD) + continue; + FD_SET(p->fd, &readset); + max_fd = max(max_fd, p->fd); + } + + 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) { + old_version = current_version; + kadm5_log_get_version_fd (log_fd, ¤t_version); + + if (current_version > old_version) { + krb5_warnx(context, + "Missed a signal, updating slaves %lu to %lu", + (unsigned long)old_version, + (unsigned long)current_version); + for (p = slaves; p != NULL; p = p->next) { + if (p->flags & SLAVE_F_DEAD) + continue; + send_diffs (context, p, log_fd, database, current_version); + } + } + } + + if (ret && FD_ISSET(signal_fd, &readset)) { + struct sockaddr_un peer_addr; + socklen_t peer_len = sizeof(peer_addr); + + if(recvfrom(signal_fd, (void *)&vers, sizeof(vers), 0, + (struct sockaddr *)&peer_addr, &peer_len) < 0) { + krb5_warn (context, errno, "recvfrom"); + continue; + } + --ret; + assert(ret >= 0); + old_version = current_version; + kadm5_log_get_version_fd (log_fd, ¤t_version); + if (current_version > old_version) { + krb5_warnx(context, + "Got a signal, updating slaves %lu to %lu", + (unsigned long)old_version, + (unsigned long)current_version); + for (p = slaves; p != NULL; p = p->next) + send_diffs (context, p, log_fd, database, current_version); + } else { + krb5_warnx(context, + "Got a signal, but no update in log version %lu", + (unsigned long)current_version); + } + } + + for(p = slaves; p != NULL; p = p->next) { + if (p->flags & SLAVE_F_DEAD) + continue; + if (ret && FD_ISSET(p->fd, &readset)) { + --ret; + assert(ret >= 0); + if(process_msg (context, p, log_fd, database, current_version)) + slave_dead(context, p); + } else if (slave_gone_p (p)) + slave_dead(context, p); + else if (slave_missing_p (p)) { + krb5_warnx(context, "slave %s missing, sending AYT", p->name); + send_are_you_there (context, p); + } + } + + if (ret && FD_ISSET(listen_fd, &readset)) { + add_slave (context, keytab, &slaves, listen_fd); + --ret; + assert(ret >= 0); + } + write_stats(context, slaves, current_version); + } + + if(exit_flag == SIGXCPU) + krb5_warnx(context, "%s CPU time limit exceeded", getprogname()); + else if(exit_flag == SIGINT || exit_flag == SIGTERM) + krb5_warnx(context, "%s terminated", getprogname()); + else + krb5_warnx(context, "%s unexpected exit reason: %d", + getprogname(), exit_flag); + + write_master_down(context); + + return 0; +} |
