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Description: systemd-like socket activation support for libmilter
Author: Mikhail Gusarov <dottedmag@debian.org
--- a/libmilter/docs/smfi_setconn.html
+++ b/libmilter/docs/smfi_setconn.html
@@ -44,6 +44,7 @@ Set the socket through which this filter
<LI><CODE>{unix|local}:/path/to/file</CODE> -- A named pipe.
<LI><CODE>inet:port@{hostname|ip-address}</CODE> -- An IPV4 socket.
<LI><CODE>inet6:port@{hostname|ip-address}</CODE> -- An IPV6 socket.
+ <LI><CODE>fd:number</CODE> -- Pre-opened file descriptor.
</UL>
</TD></TR>
</TABLE>
--- a/libmilter/listener.c
+++ b/libmilter/listener.c
@@ -197,6 +197,11 @@
L_socksize = sizeof addr.sin6;
}
#endif /* NETINET6 */
+ else if (strcasecmp(p, "fd") == 0)
+ {
+ addr.sa.sa_family = AF_UNSPEC;
+ L_socksize = sizeof (_SOCK_ADDR);
+ }
else
{
smi_log(SMI_LOG_ERR, "%s: unknown socket type %s",
@@ -443,7 +448,21 @@
}
#endif /* NETINET || NETINET6 */
- sock = socket(addr.sa.sa_family, SOCK_STREAM, 0);
+ if (addr.sa.sa_family == AF_UNSPEC)
+ {
+ char *end;
+ sock = strtol(colon, &end, 10);
+ if (*end != '\0' || sock < 0)
+ {
+ smi_log(SMI_LOG_ERR, "%s: expected positive integer as fd, got %s", name, colon);
+ return INVALID_SOCKET;
+ }
+ }
+ else
+ {
+ sock = socket(addr.sa.sa_family, SOCK_STREAM, 0);
+ }
+
if (!ValidSocket(sock))
{
smi_log(SMI_LOG_ERR,
@@ -466,6 +485,7 @@
#if NETUNIX
addr.sa.sa_family != AF_UNIX &&
#endif
+ addr.sa.sa_family != AF_UNSPEC &&
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &sockopt,
sizeof(sockopt)) == -1)
{
@@ -511,7 +531,8 @@
}
#endif /* NETUNIX */
- if (bind(sock, &addr.sa, L_socksize) < 0)
+ if (addr.sa.sa_family != AF_UNSPEC &&
+ bind(sock, &addr.sa, L_socksize) < 0)
{
smi_log(SMI_LOG_ERR,
"%s: Unable to bind to port %s: %s",
@@ -818,7 +839,7 @@
#ifdef BSD4_4_SOCKADDR
cliaddr.sa.sa_len == 0 ||
#endif
- cliaddr.sa.sa_family != L_family))
+ (L_family != AF_UNSPEC && cliaddr.sa.sa_family != L_family)))
{
(void) closesocket(connfd);
connfd = INVALID_SOCKET;
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