int main(int argc, char **argv)
{
INET_ADDR_LIST list;
struct sockaddr_storage *sa;
MAI_HOSTADDR_STR hostaddr;
INET_PROTO_INFO *proto_info;
msg_vstream_init(argv[0], VSTREAM_ERR);
if (argc < 3)
msg_fatal("usage: %s protocols hostname...", argv[0]);
proto_info = inet_proto_init(argv[0], argv[1]);
argv += 1;
while (--argc && *++argv) {
inet_addr_list_init(&list);
if (inet_addr_host(&list, *argv) == 0)
msg_fatal("not found: %s", *argv);
for (sa = list.addrs; sa < list.addrs + list.used; sa++) {
SOCKADDR_TO_HOSTADDR(SOCK_ADDR_PTR(sa), SOCK_ADDR_LEN(sa),
&hostaddr, (MAI_SERVPORT_STR *) 0, 0);
vstream_printf("%s\t%s\n", *argv, hostaddr.buf);
}
vstream_fflush(VSTREAM_OUT);
inet_addr_list_free(&list);
}
return (0);
}
static void inet_addr_list_print(INET_ADDR_LIST *list)
{
MAI_HOSTADDR_STR hostaddr;
struct sockaddr_storage *sa;
for (sa = list->addrs; sa < list->addrs + list->used; sa++) {
SOCKADDR_TO_HOSTADDR(SOCK_ADDR_PTR(sa), SOCK_ADDR_LEN(sa),
&hostaddr, (MAI_SERVPORT_STR *) 0, 0);
msg_info("%s", hostaddr.buf);
}
}
int main(int unused_argc, char **argv)
{
INET_ADDR_LIST addr_list;
INET_ADDR_LIST mask_list;
MAI_HOSTADDR_STR hostaddr;
MAI_HOSTADDR_STR hostmask;
struct sockaddr *sa;
int i;
INET_PROTO_INFO *proto_info;
msg_vstream_init(argv[0], VSTREAM_ERR);
msg_verbose = 1;
proto_info = inet_proto_init(argv[0],
argv[1] ? argv[1] : INET_PROTO_NAME_ALL);
inet_addr_list_init(&addr_list);
inet_addr_list_init(&mask_list);
inet_addr_local(&addr_list, &mask_list, proto_info->ai_family_list);
if (addr_list.used == 0)
msg_fatal("cannot find any active network interfaces");
if (addr_list.used == 1)
msg_warn("found only one active network interface");
for (i = 0; i < addr_list.used; i++) {
sa = SOCK_ADDR_PTR(addr_list.addrs + i);
SOCKADDR_TO_HOSTADDR(SOCK_ADDR_PTR(sa), SOCK_ADDR_LEN(sa),
&hostaddr, (MAI_SERVPORT_STR *) 0, 0);
sa = SOCK_ADDR_PTR(mask_list.addrs + i);
SOCKADDR_TO_HOSTADDR(SOCK_ADDR_PTR(sa), SOCK_ADDR_LEN(sa),
&hostmask, (MAI_SERVPORT_STR *) 0, 0);
vstream_printf("%s/%s\n", hostaddr.buf, hostmask.buf);
vstream_fflush(VSTREAM_OUT);
}
inet_addr_list_free(&addr_list);
inet_addr_list_free(&mask_list);
return (0);
}
void inet_addr_list_append(INET_ADDR_LIST *list,
struct sockaddr * addr)
{
const char *myname = "inet_addr_list_append";
MAI_HOSTADDR_STR hostaddr;
int new_size;
if (msg_verbose > 1) {
SOCKADDR_TO_HOSTADDR(addr, SOCK_ADDR_LEN(addr),
&hostaddr, (MAI_SERVPORT_STR *) 0, 0);
msg_info("%s: %s", myname, hostaddr.buf);
}
if (list->used >= list->size) {
new_size = list->size * 2;
list->addrs = (struct sockaddr_storage *)
myrealloc((char *) list->addrs, sizeof(*list->addrs) * new_size);
list->size = new_size;
}
memcpy(list->addrs + list->used++, addr, SOCK_ADDR_LEN(addr));
}
int main(int argc, char **argv)
{
DNS_RR *rr;
MAI_HOSTADDR_STR hostaddr;
MAI_SERVPORT_STR portnum;
struct sockaddr_storage ss;
struct sockaddr *sa = (struct sockaddr *) &ss;
SOCKADDR_SIZE sa_length = sizeof(ss);
VSTRING *why;
int type;
int port;
myname = argv[0];
if (argc < 4)
usage();
why = vstring_alloc(1);
while (*++argv) {
if (argv[1] == 0 || argv[2] == 0)
usage();
if ((type = dns_type(argv[0])) == 0)
usage();
if (!alldig(argv[2]) || (port = atoi(argv[2])) > 65535)
usage();
if (dns_lookup(argv[1], type, 0, &rr, (VSTRING *) 0, why) != DNS_OK)
msg_fatal("%s: %s", argv[1], vstring_str(why));
sa_length = sizeof(ss);
if (dns_rr_to_sa(rr, htons(port), sa, &sa_length) != 0)
msg_fatal("dns_rr_to_sa: %m");
SOCKADDR_TO_HOSTADDR(sa, sa_length, &hostaddr, &portnum, 0);
vstream_printf("%s %s -> %s %s\n",
argv[1], argv[2], hostaddr.buf, portnum.buf);
vstream_fflush(VSTREAM_OUT);
argv += 2;
dns_rr_free(rr);
}
vstring_free(why);
return (0);
}
static SMTP_SESSION *smtp_connect_addr(SMTP_ITERATOR *iter, DSN_BUF *why,
int sess_flags)
{
const char *myname = "smtp_connect_addr";
struct sockaddr_storage ss; /* remote */
struct sockaddr *sa = (struct sockaddr *) &ss;
SOCKADDR_SIZE salen = sizeof(ss);
MAI_HOSTADDR_STR hostaddr;
DNS_RR *addr = iter->rr;
unsigned port = iter->port;
int sock;
char *bind_addr;
char *bind_var;
dsb_reset(why); /* Paranoia */
/*
* Sanity checks.
*/
if (dns_rr_to_sa(addr, port, sa, &salen) != 0) {
msg_warn("%s: skip address type %s: %m",
myname, dns_strtype(addr->type));
dsb_simple(why, "4.4.0", "network address conversion failed: %m");
return (0);
}
/*
* Initialize.
*/
if ((sock = socket(sa->sa_family, SOCK_STREAM, 0)) < 0)
msg_fatal("%s: socket: %m", myname);
if (inet_windowsize > 0)
set_inet_windowsize(sock, inet_windowsize);
/*
* Allow the sysadmin to specify the source address, for example, as "-o
* smtp_bind_address=x.x.x.x" in the master.cf file.
*/
#ifdef HAS_IPV6
if (sa->sa_family == AF_INET6) {
bind_addr = var_smtp_bind_addr6;
bind_var = VAR_LMTP_SMTP(BIND_ADDR6);
} else
#endif
if (sa->sa_family == AF_INET) {
bind_addr = var_smtp_bind_addr;
bind_var = VAR_LMTP_SMTP(BIND_ADDR);
} else
bind_var = bind_addr = "";
if (*bind_addr) {
int aierr;
struct addrinfo *res0;
if ((aierr = hostaddr_to_sockaddr(bind_addr, (char *) 0, 0, &res0)) != 0)
msg_fatal("%s: bad %s parameter: %s: %s",
myname, bind_var, bind_addr, MAI_STRERROR(aierr));
if (bind(sock, res0->ai_addr, res0->ai_addrlen) < 0)
msg_warn("%s: bind %s: %m", myname, bind_addr);
else if (msg_verbose)
msg_info("%s: bind %s", myname, bind_addr);
freeaddrinfo(res0);
}
/*
* When running as a virtual host, bind to the virtual interface so that
* the mail appears to come from the "right" machine address.
*
* XXX The IPv6 patch expands the null host (as client endpoint) and uses
* the result as the loopback address list.
*/
else {
int count = 0;
struct sockaddr *own_addr = 0;
INET_ADDR_LIST *addr_list = own_inet_addr_list();
struct sockaddr_storage *s;
for (s = addr_list->addrs; s < addr_list->addrs + addr_list->used; s++) {
if (SOCK_ADDR_FAMILY(s) == sa->sa_family) {
if (count++ > 0)
break;
own_addr = SOCK_ADDR_PTR(s);
}
}
if (count == 1 && !sock_addr_in_loopback(own_addr)) {
if (bind(sock, own_addr, SOCK_ADDR_LEN(own_addr)) < 0) {
SOCKADDR_TO_HOSTADDR(own_addr, SOCK_ADDR_LEN(own_addr),
&hostaddr, (MAI_SERVPORT_STR *) 0, 0);
msg_warn("%s: bind %s: %m", myname, hostaddr.buf);
} else if (msg_verbose) {
SOCKADDR_TO_HOSTADDR(own_addr, SOCK_ADDR_LEN(own_addr),
&hostaddr, (MAI_SERVPORT_STR *) 0, 0);
msg_info("%s: bind %s", myname, hostaddr.buf);
}
}
}
/*
* Connect to the server.
*/
if (msg_verbose)
msg_info("%s: trying: %s[%s] port %d...",
myname, STR(iter->host), STR(iter->addr), ntohs(port));
return (smtp_connect_sock(sock, sa, salen, iter, why, sess_flags));
}
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);
}
}
static void own_inet_addr_init(INET_ADDR_LIST *addr_list,
INET_ADDR_LIST *mask_list)
{
INET_ADDR_LIST local_addrs;
INET_ADDR_LIST local_masks;
char *hosts;
char *host;
const char *sep = " \t,";
char *bufp;
int nvirtual;
int nlocal;
MAI_HOSTADDR_STR hostaddr;
struct sockaddr_storage *sa;
struct sockaddr_storage *ma;
inet_addr_list_init(addr_list);
inet_addr_list_init(mask_list);
/*
* If we are listening on all interfaces (default), ask the system what
* the interfaces are.
*/
if (strcmp(var_inet_interfaces, INET_INTERFACES_ALL) == 0) {
if (inet_addr_local(addr_list, mask_list,
inet_proto_info()->ai_family_list) == 0)
msg_fatal("could not find any active network interfaces");
}
/*
* Select all loopback interfaces from the system's available interface
* list.
*/
else if (strcmp(var_inet_interfaces, INET_INTERFACES_LOCAL) == 0) {
inet_addr_list_init(&local_addrs);
inet_addr_list_init(&local_masks);
if (inet_addr_local(&local_addrs, &local_masks,
inet_proto_info()->ai_family_list) == 0)
msg_fatal("could not find any active network interfaces");
for (sa = local_addrs.addrs, ma = local_masks.addrs;
sa < local_addrs.addrs + local_addrs.used; sa++, ma++) {
if (sock_addr_in_loopback(SOCK_ADDR_PTR(sa))) {
inet_addr_list_append(addr_list, SOCK_ADDR_PTR(sa));
inet_addr_list_append(mask_list, SOCK_ADDR_PTR(ma));
}
}
inet_addr_list_free(&local_addrs);
inet_addr_list_free(&local_masks);
}
/*
* If we are supposed to be listening only on specific interface
* addresses (virtual hosting), look up the addresses of those
* interfaces.
*/
else {
bufp = hosts = mystrdup(var_inet_interfaces);
while ((host = mystrtok(&bufp, sep)) != 0)
if (inet_addr_host(addr_list, host) == 0)
msg_fatal("config variable %s: host not found: %s",
VAR_INET_INTERFACES, host);
myfree(hosts);
/*
* Weed out duplicate IP addresses. Duplicates happen when the same
* IP address is listed under multiple hostnames. If we don't weed
* out duplicates, Postfix can suddenly stop working after the DNS is
* changed.
*/
inet_addr_list_uniq(addr_list);
/*
* Find out the netmask for each virtual interface, by looking it up
* among all the local interfaces.
*/
inet_addr_list_init(&local_addrs);
inet_addr_list_init(&local_masks);
if (inet_addr_local(&local_addrs, &local_masks,
inet_proto_info()->ai_family_list) == 0)
msg_fatal("could not find any active network interfaces");
for (nvirtual = 0; nvirtual < addr_list->used; nvirtual++) {
for (nlocal = 0; /* see below */ ; nlocal++) {
if (nlocal >= local_addrs.used) {
SOCKADDR_TO_HOSTADDR(
SOCK_ADDR_PTR(addr_list->addrs + nvirtual),
SOCK_ADDR_LEN(addr_list->addrs + nvirtual),
&hostaddr, (MAI_SERVPORT_STR *) 0, 0);
msg_fatal("parameter %s: no local interface found for %s",
VAR_INET_INTERFACES, hostaddr.buf);
}
if (SOCK_ADDR_EQ_ADDR(addr_list->addrs + nvirtual,
local_addrs.addrs + nlocal)) {
inet_addr_list_append(mask_list,
SOCK_ADDR_PTR(local_masks.addrs + nlocal));
break;
}
}
}
inet_addr_list_free(&local_addrs);
inet_addr_list_free(&local_masks);
}
}
