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Rename listen_address -> server_address and add reference counting.

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This will be used by the upcoming relay mode.
This commit is contained in:
Todd C. Miller
2021-04-06 14:44:19 -06:00
parent 72c40ae0e1
commit 8101b23e54
3 changed files with 58 additions and 26 deletions
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6
logsrvd/logsrvd.c
View File

@@ -1417,7 +1417,7 @@ bad:
}
static int
create_listener(struct listen_address *addr)
create_listener(struct server_address *addr)
{
int flags, on, sock;
const char *family = "inet4";
@@ -1502,7 +1502,7 @@ listener_cb(int fd, int what, void *v)
}
static bool
register_listener(struct listen_address *addr, struct sudo_event_base *evbase)
register_listener(struct server_address *addr, struct sudo_event_base *evbase)
{
struct listener *l;
int sock;
@@ -1533,7 +1533,7 @@ register_listener(struct listen_address *addr, struct sudo_event_base *evbase)
static bool
server_setup(struct sudo_event_base *base)
{
struct listen_address *addr;
struct server_address *addr;
struct listener *l;
int nlisteners = 0;
bool ret, config_tls = false;

12
logsrvd/logsrvd.h
View File

@@ -98,16 +98,16 @@ union sockaddr_union {
};
/*
* List of listen addresses.
* List of server addresses.
*/
struct listen_address {
TAILQ_ENTRY(listen_address) entries;
struct server_address {
TAILQ_ENTRY(server_address) entries;
char *sa_str;
union sockaddr_union sa_un;
socklen_t sa_size;
bool tls;
};
TAILQ_HEAD(listen_address_list, listen_address);
TAILQ_HEAD(server_address_list, server_address);
/*
* List of active network listeners.
@@ -151,7 +151,7 @@ void iolog_close_all(struct connection_closure *closure);
bool logsrvd_conf_read(const char *path);
const char *logsrvd_conf_iolog_dir(void);
const char *logsrvd_conf_iolog_file(void);
struct listen_address_list *logsrvd_conf_listen_address(void);
struct server_address_list *logsrvd_conf_listen_address(void);
bool logsrvd_conf_tcp_keepalive(void);
const char *logsrvd_conf_pid_file(void);
struct timespec *logsrvd_conf_get_sock_timeout(void);
@@ -160,5 +160,7 @@ const struct logsrvd_tls_config *logsrvd_get_tls_config(void);
struct logsrvd_tls_runtime *logsrvd_get_tls_runtime(void);
#endif
mode_t logsrvd_conf_iolog_mode(void);
void address_list_addref(struct server_address_list *);
void address_list_delref(struct server_address_list *);
#endif /* SUDO_LOGSRVD_H */

66
logsrvd/logsrvd_conf.c
View File

@@ -1,7 +1,7 @@
/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>
* Copyright (c) 2019-2021 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -76,9 +76,14 @@ struct logsrvd_config_section {
struct logsrvd_config_entry *entries;
};
struct address_list_container {
unsigned int refcnt;
struct server_address_list addrs;
};
static struct logsrvd_config {
struct logsrvd_config_server {
struct listen_address_list addresses;
struct address_list_container addresses;
struct timespec timeout;
bool tcp_keepalive;
char *pid_file;
@@ -136,10 +141,10 @@ logsrvd_conf_iolog_file(void)
}
/* server getters */
struct listen_address_list *
struct server_address_list *
logsrvd_conf_listen_address(void)
{
return &logsrvd_config->server.addresses;
return &logsrvd_config->server.addresses.addrs;
}
bool
@@ -306,13 +311,13 @@ cb_iolog_maxseq(struct logsrvd_config *config, const char *str)
/* Server callbacks */
static bool
cb_listen_address(struct logsrvd_config *config, const char *str)
append_address(struct server_address_list *addresses, const char *str)
{
struct addrinfo hints, *res, *res0 = NULL;
char *copy, *host, *port;
bool tls, ret = false;
int error;
debug_decl(cb_iolog_mode, SUDO_DEBUG_UTIL);
debug_decl(append_address, SUDO_DEBUG_UTIL);
if ((copy = strdup(str)) == NULL) {
sudo_warn(NULL);
@@ -344,7 +349,7 @@ cb_listen_address(struct logsrvd_config *config, const char *str)
goto done;
}
for (res = res0; res != NULL; res = res->ai_next) {
struct listen_address *addr;
struct server_address *addr;
if ((addr = malloc(sizeof(*addr))) == NULL) {
sudo_warn(NULL);
@@ -358,7 +363,7 @@ cb_listen_address(struct logsrvd_config *config, const char *str)
memcpy(&addr->sa_un, res->ai_addr, res->ai_addrlen);
addr->sa_size = res->ai_addrlen;
addr->tls = tls;
TAILQ_INSERT_TAIL(&config->server.addresses, addr, entries);
TAILQ_INSERT_TAIL(addresses, addr, entries);
}
ret = true;
@@ -369,6 +374,12 @@ done:
debug_return_bool(ret);
}
static bool
cb_listen_address(struct logsrvd_config *config, const char *str)
{
return append_address(&config->server.addresses.addrs, str);
}
static bool
cb_timeout(struct logsrvd_config *config, const char *str)
{
@@ -683,6 +694,29 @@ cb_logfile_time_format(struct logsrvd_config *config, const char *str)
debug_return_bool(true);
}
void
address_list_addref(struct server_address_list *al)
{
struct address_list_container *container =
__containerof(al, struct address_list_container, addrs);
container->refcnt++;
}
void
address_list_delref(struct server_address_list *al)
{
struct address_list_container *container =
__containerof(al, struct address_list_container, addrs);
if (--container->refcnt == 0) {
struct server_address *addr;
while ((addr = TAILQ_FIRST(al))) {
TAILQ_REMOVE(al, addr, entries);
free(addr->sa_str);
free(addr);
}
}
}
static struct logsrvd_config_entry server_conf_entries[] = {
{ "listen_address", cb_listen_address },
{ "timeout", cb_timeout },
@@ -891,18 +925,13 @@ logsrvd_conf_eventlog_setconf(struct logsrvd_config *config)
void
logsrvd_conf_free(struct logsrvd_config *config)
{
struct listen_address *addr;
debug_decl(logsrvd_conf_free, SUDO_DEBUG_UTIL);
if (config == NULL)
debug_return;
/* struct logsrvd_config_server */
while ((addr = TAILQ_FIRST(&config->server.addresses))) {
TAILQ_REMOVE(&config->server.addresses, addr, entries);
free(addr->sa_str);
free(addr);
}
address_list_delref(&config->server.addresses.addrs);
free(config->server.pid_file);
/* struct logsrvd_config_iolog */
@@ -945,7 +974,8 @@ logsrvd_conf_alloc(void)
}
/* Server defaults */
TAILQ_INIT(&config->server.addresses);
TAILQ_INIT(&config->server.addresses.addrs);
config->server.addresses.refcnt = 1;
config->server.timeout.tv_sec = DEFAULT_SOCKET_TIMEOUT_SEC;
config->server.tcp_keepalive = true;
config->server.pid_file = strdup(_PATH_SUDO_LOGSRVD_PID);
@@ -1036,7 +1066,7 @@ logsrvd_conf_apply(struct logsrvd_config *config)
debug_decl(logsrvd_conf_apply, SUDO_DEBUG_UTIL);
/* There can be multiple addresses so we can't set a default earlier. */
if (TAILQ_EMPTY(&config->server.addresses)) {
if (TAILQ_EMPTY(&config->server.addresses.addrs)) {
/* Enable plaintext listender. */
if (!cb_listen_address(config, "*:" DEFAULT_PORT))
debug_return_bool(false);
@@ -1047,10 +1077,10 @@ logsrvd_conf_apply(struct logsrvd_config *config)
debug_return_bool(false);
}
} else {
struct listen_address *addr;
struct server_address *addr;
/* Check that TLS configuration is valid. */
TAILQ_FOREACH(addr, &config->server.addresses, entries) {
TAILQ_FOREACH(addr, &config->server.addresses.addrs, entries) {
if (!addr->tls)
continue;
/*