void master_listen_init(MASTER_SERV *serv)
{
const char *myname = "master_listen_init";
char *end_point;
int n;
MAI_HOSTADDR_STR hostaddr;
struct sockaddr *sa;
/*
* Find out what transport we should use, then create one or more
* listener sockets. Make the listener sockets non-blocking, so that
* child processes don't block in accept() when multiple processes are
* selecting on the same socket and only one of them gets the connection.
*/
switch (serv->type) {
/*
* UNIX-domain or stream listener endpoints always come as singlets.
*/
case MASTER_SERV_TYPE_UNIX:
set_eugid(var_owner_uid, var_owner_gid);
serv->listen_fd[0] =
LOCAL_LISTEN(serv->name, serv->max_proc > var_proc_limit ?
serv->max_proc : var_proc_limit, NON_BLOCKING);
close_on_exec(serv->listen_fd[0], CLOSE_ON_EXEC);
set_ugid(getuid(), getgid());
break;
/*
* FIFO listener endpoints always come as singlets.
*/
case MASTER_SERV_TYPE_FIFO:
set_eugid(var_owner_uid, var_owner_gid);
serv->listen_fd[0] = fifo_listen(serv->name, 0622, NON_BLOCKING);
close_on_exec(serv->listen_fd[0], CLOSE_ON_EXEC);
set_ugid(getuid(), getgid());
break;
/*
* INET-domain listener endpoints can be wildcarded (the default) or
* bound to specific interface addresses.
*
* With dual-stack IPv4/6 systems it does not matter, we have to specify
* the addresses anyway, either explicit or wild-card.
*/
case MASTER_SERV_TYPE_INET:
for (n = 0; n < serv->listen_fd_count; n++) {
sa = SOCK_ADDR_PTR(MASTER_INET_ADDRLIST(serv)->addrs + n);
SOCKADDR_TO_HOSTADDR(sa, SOCK_ADDR_LEN(sa), &hostaddr,
(MAI_SERVPORT_STR *) 0, 0);
end_point = concatenate(hostaddr.buf,
":", MASTER_INET_PORT(serv), (char *) 0);
serv->listen_fd[n]
= inet_listen(end_point, serv->max_proc > var_proc_limit ?
serv->max_proc : var_proc_limit, NON_BLOCKING);
close_on_exec(serv->listen_fd[n], CLOSE_ON_EXEC);
myfree(end_point);
}
break;
/*
* Descriptor passing endpoints always come as singlets.
*/
#ifdef MASTER_SERV_TYPE_PASS
case MASTER_SERV_TYPE_PASS:
set_eugid(var_owner_uid, var_owner_gid);
serv->listen_fd[0] =
PASS_LISTEN(serv->name, serv->max_proc > var_proc_limit ?
serv->max_proc : var_proc_limit, NON_BLOCKING);
close_on_exec(serv->listen_fd[0], CLOSE_ON_EXEC);
set_ugid(getuid(), getgid());
break;
#endif
default:
msg_panic("%s: unknown service type: %d", myname, serv->type);
}
}
MASTER_SERV *get_master_ent()
{
VSTRING *buf = vstring_alloc(100);
VSTRING *junk = vstring_alloc(100);
MASTER_SERV *serv;
char *cp;
char *name;
char *host = 0;
char *port = 0;
char *transport;
int private;
int unprivileged; /* passed on to child */
int chroot; /* passed on to child */
char *command;
int n;
char *bufp;
char *atmp;
const char *parse_err;
static char *saved_interfaces = 0;
char *err;
if (master_fp == 0)
msg_panic("get_master_ent: config file not open");
if (master_disable == 0)
msg_panic("get_master_ent: no service disable list");
/*
* XXX We cannot change the inet_interfaces setting for a running master
* process. Listening sockets are inherited by child processes so that
* closing and reopening those sockets in the master does not work.
*
* Another problem is that library routines still cache results that are
* based on the old inet_interfaces setting. It is too much trouble to
* recompute everything.
*
* In order to keep our data structures consistent we ignore changes in
* inet_interfaces settings, and issue a warning instead.
*/
if (saved_interfaces == 0)
saved_interfaces = mystrdup(var_inet_interfaces);
/*
* Skip blank lines and comment lines.
*/
for (;;) {
if (readllines(buf, master_fp, &master_line_last, &master_line) == 0) {
vstring_free(buf);
vstring_free(junk);
return (0);
}
bufp = vstring_str(buf);
if ((cp = mystrtok(&bufp, master_blanks)) == 0)
continue;
name = cp;
transport = get_str_ent(&bufp, "transport type", (char *) 0);
vstring_sprintf(junk, "%s/%s", name, transport);
if (match_service_match(master_disable, vstring_str(junk)) == 0)
break;
}
/*
* Parse one logical line from the configuration file. Initialize service
* structure members in order.
*/
serv = (MASTER_SERV *) mymalloc(sizeof(MASTER_SERV));
serv->next = 0;
/*
* Flags member.
*/
serv->flags = 0;
/*
* All servers busy warning timer.
*/
serv->busy_warn_time = 0;
/*
* Service name. Syntax is transport-specific.
*/
serv->ext_name = mystrdup(name);
/*
* Transport type: inet (wild-card listen or virtual) or unix.
*/
#define STR_SAME !strcmp
if (STR_SAME(transport, MASTER_XPORT_NAME_INET)) {
if (!STR_SAME(saved_interfaces, var_inet_interfaces)) {
msg_warn("service %s: ignoring %s change",
serv->ext_name, VAR_INET_INTERFACES);
msg_warn("to change %s, stop and start Postfix",
VAR_INET_INTERFACES);
}
serv->type = MASTER_SERV_TYPE_INET;
atmp = mystrdup(name);
if ((parse_err = host_port(atmp, &host, "", &port, (char *) 0)) != 0)
fatal_with_context("%s in \"%s\"", parse_err, name);
if (*host) {
serv->flags |= MASTER_FLAG_INETHOST;/* host:port */
MASTER_INET_ADDRLIST(serv) = (INET_ADDR_LIST *)
mymalloc(sizeof(*MASTER_INET_ADDRLIST(serv)));
inet_addr_list_init(MASTER_INET_ADDRLIST(serv));
if (inet_addr_host(MASTER_INET_ADDRLIST(serv), host) == 0)
fatal_with_context("bad hostname or network address: %s", name);
inet_addr_list_uniq(MASTER_INET_ADDRLIST(serv));
serv->listen_fd_count = MASTER_INET_ADDRLIST(serv)->used;
} else {
MASTER_INET_ADDRLIST(serv) =
strcasecmp(saved_interfaces, INET_INTERFACES_ALL) ?
own_inet_addr_list() : /* virtual */
wildcard_inet_addr_list(); /* wild-card */
inet_addr_list_uniq(MASTER_INET_ADDRLIST(serv));
serv->listen_fd_count = MASTER_INET_ADDRLIST(serv)->used;
}
MASTER_INET_PORT(serv) = mystrdup(port);
for (n = 0; /* see below */ ; n++) {
if (n >= MASTER_INET_ADDRLIST(serv)->used) {
serv->flags |= MASTER_FLAG_LOCAL_ONLY;
break;
}
if (!sock_addr_in_loopback(SOCK_ADDR_PTR(MASTER_INET_ADDRLIST(serv)->addrs + n)))
break;
}
} else if (STR_SAME(transport, MASTER_XPORT_NAME_UNIX)) {
serv->type = MASTER_SERV_TYPE_UNIX;
serv->listen_fd_count = 1;
serv->flags |= MASTER_FLAG_LOCAL_ONLY;
} else if (STR_SAME(transport, MASTER_XPORT_NAME_UXDG)) {
serv->type = MASTER_SERV_TYPE_UXDG;
serv->listen_fd_count = 1;
serv->flags |= MASTER_FLAG_LOCAL_ONLY;
} else if (STR_SAME(transport, MASTER_XPORT_NAME_FIFO)) {
serv->type = MASTER_SERV_TYPE_FIFO;
serv->listen_fd_count = 1;
serv->flags |= MASTER_FLAG_LOCAL_ONLY;
#ifdef MASTER_SERV_TYPE_PASS
} else if (STR_SAME(transport, MASTER_XPORT_NAME_PASS)) {
serv->type = MASTER_SERV_TYPE_PASS;
serv->listen_fd_count = 1;
/* If this is a connection screener, remote clients are likely. */
#endif
} else {
fatal_with_context("bad transport type: %s", transport);
}
/*
* Service class: public or private.
*/
private = get_bool_ent(&bufp, "private", "y");