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2005-08-16 Paul Jakma <paul.jakma@sun.com>

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* ripd.c: (general) Fix previous commit, broke multicast bind and
	  hence setting of source port, which broke communication with
	  non-borken ripd. Fix removes more stuff from rip_interface.c
	  than it adds to ripd.c ;)
	  (rip_create_socket) the to argument really is a from argument,
	  rename it. Set the source port to RIP port unconditionally, it's
	  required.
	  (rip_send_packet) Set from address correctly for multicast.
	  (rip_output_process) trivial: num can be BSS specified, rather
	  than in body.
	* rip_interface.c: (rip_interface_multicast_set) strip out
	  redundant stuff related to bind, which rip_create_socket does.
	  Just make it set the multicast socket option, as per the
	  interface concerned, no more.
This commit is contained in:
paul 2005-08-16 15:22:14 +00:00
parent 60f0651c32
commit 2c61ae3782
3 changed files with 47 additions and 51 deletions
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17
ripd/ChangeLog
View file

@ -1,3 +1,20 @@
2005-08-16 Paul Jakma <paul.jakma@sun.com>
* ripd.c: (general) Fix previous commit, broke multicast bind and
hence setting of source port, which broke communication with
non-borken ripd. Fix removes more stuff from rip_interface.c
than it adds to ripd.c ;)
(rip_create_socket) the to argument really is a from argument,
rename it. Set the source port to RIP port unconditionally, it's
required.
(rip_send_packet) Set from address correctly for multicast.
(rip_output_process) trivial: num can be BSS specified, rather
than in body.
* rip_interface.c: (rip_interface_multicast_set) strip out
redundant stuff related to bind, which rip_create_socket does.
Just make it set the multicast socket option, as per the
interface concerned, no more.
2005-06-03 Paul Jakma <paul.jakma@sun.com>
* ripd.c: (rip_create_socket) move it up so rip_send_packet

38
ripd/rip_interface.c
View file

@ -139,9 +139,6 @@ rip_interface_new ()
void
rip_interface_multicast_set (int sock, struct connected *connected)
{
int ret;
struct servent *sp;
struct sockaddr_in from;
struct in_addr addr;
struct prefix_ipv4 *p;
@ -161,43 +158,8 @@ rip_interface_multicast_set (int sock, struct connected *connected)
"source address %s for interface %s",
sock, inet_ntoa(addr),
connected->ifp->name);
return;
}
/* Bind myself. */
memset (&from, 0, sizeof (struct sockaddr_in));
/* Set RIP port. */
sp = getservbyname ("router", "udp");
if (sp)
from.sin_port = sp->s_port;
else
from.sin_port = htons (RIP_PORT_DEFAULT);
/* Address should be any address. */
from.sin_family = AF_INET;
from.sin_addr = connected->address->u.prefix4;
#ifdef HAVE_SIN_LEN
from.sin_len = sizeof (struct sockaddr_in);
#endif /* HAVE_SIN_LEN */
if (ripd_privs.change (ZPRIVS_RAISE))
zlog_err ("rip_interface_multicast_set: could not raise privs");
ret = bind (sock, (struct sockaddr *) & from, sizeof (struct sockaddr_in));
if (ret < 0)
{
zlog_warn ("Can't bind socket fd %d to %s port %d for "
"interface %s: %s",
sock,inet_ntoa(from.sin_addr),
(int)ntohs(from.sin_port),
connected->ifp->name,
safe_strerror (errno));
}
if (ripd_privs.change (ZPRIVS_LOWER))
zlog_err ("rip_interface_multicast_set: could not lower privs");
return;
}

37
ripd/ripd.c
View file

@ -1321,21 +1321,26 @@ rip_response_process (struct rip_packet *packet, int size,
/* Make socket for RIP protocol. */
static int
rip_create_socket (struct sockaddr_in *to)
rip_create_socket (struct sockaddr_in *from)
{
int ret;
int sock;
struct sockaddr_in addr;
if (!to)
memset (&addr, 0, sizeof (struct sockaddr_in));
if (!from)
{
memset (&addr, 0, sizeof (struct sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_port = htons (RIP_PORT_DEFAULT);
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = INADDR_ANY;
#ifdef HAVE_SINLEN
addr.sin_len = sizeof (struct sockaddr_in);
#endif /* HAVE_SINLEN */
}
/* sending port must always be the RIP port */
addr.sin_port = htons (RIP_PORT_DEFAULT);
/* Make datagram socket. */
sock = socket (AF_INET, SOCK_DGRAM, 0);
if (sock < 0)
@ -1360,8 +1365,12 @@ rip_create_socket (struct sockaddr_in *to)
int save_errno = errno;
if (ripd_privs.change (ZPRIVS_LOWER))
zlog_err ("rip_create_socket: could not lower privs");
zlog_err("cannot bind to port %d: %s",
(int)ntohs(addr.sin_port), safe_strerror(save_errno));
zlog_err("%s: Can't bind socket %d to %s port %d: %s", __func__,
sock, inet_ntoa(addr.sin_addr),
(int) ntohs(addr.sin_port),
safe_strerror(save_errno));
close (sock);
return ret;
}
@ -1440,16 +1449,25 @@ rip_send_packet (u_char * buf, int size, struct sockaddr_in *to,
}
else
{
struct sockaddr_in from;
sin.sin_port = htons (RIP_PORT_DEFAULT);
sin.sin_addr.s_addr = htonl (INADDR_RIP_GROUP);
/* multicast send should bind to local interface address */
from.sin_family = AF_INET;
from.sin_port = htons (RIP_PORT_DEFAULT);
from.sin_addr = ifc->address->u.prefix4;
#ifdef HAVE_SIN_LEN
from.sin_len = sizeof (struct sockaddr_in);
#endif /* HAVE_SIN_LEN */
/*
* we have to open a new socket for each packet because this
* is the most portable way to bind to a different source
* ipv4 address for each packet.
*/
if ( (send_sock = rip_create_socket (&sin)) < 0)
if ( (send_sock = rip_create_socket (&from)) < 0)
{
zlog_warn("rip_send_packet could not create socket.");
return -1;
@ -2105,7 +2123,7 @@ rip_output_process (struct connected *ifc, struct sockaddr_in *to,
with larger key string sizes */
char auth_str[RIP_AUTH_SIMPLE_SIZE];
size_t doff; /* offset of digest offset field */
int num;
int num = 0;
int rtemax;
int subnetted = 0;
@ -2124,7 +2142,6 @@ rip_output_process (struct connected *ifc, struct sockaddr_in *to,
/* Reset stream and RTE counter. */
stream_reset (s);
num = 0;
rtemax = (RIP_PACKET_MAXSIZ - 4) / 20;
/* Get RIP interface. */