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-rw-r--r--lib/ChangeLog10
-rw-r--r--lib/zclient.c59
-rw-r--r--lib/zclient.h36
-rw-r--r--lib/zebra.h10
-rw-r--r--zebra/ChangeLog4
-rw-r--r--zebra/zserv.c76
6 files changed, 120 insertions, 75 deletions
diff --git a/lib/ChangeLog b/lib/ChangeLog
index 0e98b924..eeb64041 100644
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,13 @@
+2006-01-16 Paul Jakma <paul.jakma@sun.com>
+
+ * zclient.h: Update the Zserv protocol header with a version
+ field. Define the old command field to be a 'marker', to
+ allow old Zserv and updated Zserv to be differentiated.
+ Future updates will bump the version field obviously. New
+ command field is made wider. Try to stop using the
+ 'zebra_size_t' typedef in the callbacks.
+ * zclient.c: Update to read/write new format header.
+
2006-01-11 Paul Jakma <paul.jakma@sun.com>
* if.h: (struct interface) expand flags to 8 bytes.
diff --git a/lib/zclient.c b/lib/zclient.c
index b09f5586..ccd8bfc7 100644
--- a/lib/zclient.c
+++ b/lib/zclient.c
@@ -270,6 +270,16 @@ zclient_send_message(struct zclient *zclient)
return 0;
}
+static void
+zclient_create_header (struct stream *s, uint16_t command)
+{
+ /* length placeholder, caller can update */
+ stream_putw (s, ZEBRA_HEADER_SIZE);
+ stream_putc (s, ZEBRA_HEADER_MARKER);
+ stream_putc (s, ZSERV_VERSION);
+ stream_putw (s, command);
+}
+
/* Send simple Zebra message. */
static int
zebra_message_send (struct zclient *zclient, int command)
@@ -281,9 +291,8 @@ zebra_message_send (struct zclient *zclient, int command)
stream_reset (s);
/* Send very simple command only Zebra message. */
- stream_putw (s, 3);
- stream_putc (s, command);
-
+ zclient_create_header (s, command);
+
return zclient_send_message(zclient);
}
@@ -423,12 +432,10 @@ zapi_ipv4_route (u_char cmd, struct zclient *zclient, struct prefix_ipv4 *p,
/* Reset stream. */
s = zclient->obuf;
stream_reset (s);
-
- /* Length place holder. */
- stream_putw (s, 0);
-
- /* Put command, type and nexthop. */
- stream_putc (s, cmd);
+
+ zclient_create_header (s, cmd);
+
+ /* Put type and nexthop. */
stream_putc (s, api->type);
stream_putc (s, api->flags);
stream_putc (s, api->message);
@@ -487,11 +494,9 @@ zapi_ipv6_route (u_char cmd, struct zclient *zclient, struct prefix_ipv6 *p,
s = zclient->obuf;
stream_reset (s);
- /* Length place holder. */
- stream_putw (s, 0);
+ zclient_create_header (s, cmd);
- /* Put command, type and nexthop. */
- stream_putc (s, cmd);
+ /* Put type and nexthop. */
stream_putc (s, api->type);
stream_putc (s, api->flags);
stream_putc (s, api->message);
@@ -543,13 +548,12 @@ zebra_redistribute_send (int command, struct zclient *zclient, int type)
s = zclient->obuf;
stream_reset(s);
-
- /* Total length of the message. */
- stream_putw (s, 4);
- stream_putc (s, command);
+ zclient_create_header (s, command);
stream_putc (s, type);
-
+
+ stream_putw_at (s, 0, stream_get_endp (s));
+
return zclient_send_message(zclient);
}
@@ -794,8 +798,8 @@ zclient_read (struct thread *thread)
{
int ret;
size_t already;
- zebra_size_t length;
- zebra_command_t command;
+ uint16_t length, command;
+ uint8_t marker, version;
struct zclient *zclient;
/* Get socket to zebra. */
@@ -826,10 +830,19 @@ zclient_read (struct thread *thread)
/* Reset to read from the beginning of the incoming packet. */
stream_set_getp(zclient->ibuf, 0);
- /* Fetch length and command. */
+ /* Fetch header values. */
length = stream_getw (zclient->ibuf);
- command = stream_getc (zclient->ibuf);
-
+ marker = stream_getc (zclient->ibuf);
+ version = stream_getc (zclient->ibuf);
+ command = stream_getw (zclient->ibuf);
+
+ if (marker != ZEBRA_HEADER_MARKER || version != ZSERV_VERSION)
+ {
+ zlog_err("%s: socket %d version mismatch, marker %d, version %d",
+ __func__, zclient->sock, marker, version);
+ return zclient_failed(zclient);
+ }
+
if (length < ZEBRA_HEADER_SIZE)
{
zlog_err("%s: socket %d message length %u is less than %d ",
diff --git a/lib/zclient.h b/lib/zclient.h
index 910db0dc..bd33295a 100644
--- a/lib/zclient.h
+++ b/lib/zclient.h
@@ -29,7 +29,7 @@
#define ZEBRA_MAX_PACKET_SIZ 4096
/* Zebra header size. */
-#define ZEBRA_HEADER_SIZE 3
+#define ZEBRA_HEADER_SIZE 6
/* Structure for the zebra client. */
struct zclient
@@ -68,17 +68,17 @@ struct zclient
u_char default_information;
/* Pointer to the callback functions. */
- int (*router_id_update) (int, struct zclient *, zebra_size_t);
- int (*interface_add) (int, struct zclient *, zebra_size_t);
- int (*interface_delete) (int, struct zclient *, zebra_size_t);
- int (*interface_up) (int, struct zclient *, zebra_size_t);
- int (*interface_down) (int, struct zclient *, zebra_size_t);
- int (*interface_address_add) (int, struct zclient *, zebra_size_t);
- int (*interface_address_delete) (int, struct zclient *, zebra_size_t);
- int (*ipv4_route_add) (int, struct zclient *, zebra_size_t);
- int (*ipv4_route_delete) (int, struct zclient *, zebra_size_t);
- int (*ipv6_route_add) (int, struct zclient *, zebra_size_t);
- int (*ipv6_route_delete) (int, struct zclient *, zebra_size_t);
+ int (*router_id_update) (int, struct zclient *, uint16_t);
+ int (*interface_add) (int, struct zclient *, uint16_t);
+ int (*interface_delete) (int, struct zclient *, uint16_t);
+ int (*interface_up) (int, struct zclient *, uint16_t);
+ int (*interface_down) (int, struct zclient *, uint16_t);
+ int (*interface_address_add) (int, struct zclient *, uint16_t);
+ int (*interface_address_delete) (int, struct zclient *, uint16_t);
+ int (*ipv4_route_add) (int, struct zclient *, uint16_t);
+ int (*ipv4_route_delete) (int, struct zclient *, uint16_t);
+ int (*ipv6_route_add) (int, struct zclient *, uint16_t);
+ int (*ipv6_route_delete) (int, struct zclient *, uint16_t);
};
/* Zebra API message flag. */
@@ -87,6 +87,18 @@ struct zclient
#define ZAPI_MESSAGE_DISTANCE 0x04
#define ZAPI_MESSAGE_METRIC 0x08
+/* Zserv protocol message header */
+struct zserv_header
+{
+ uint16_t length;
+ uint8_t marker; /* corresponds to command field in old zserv
+ * always set to 255 in new zserv.
+ */
+ uint8_t version;
+#define ZSERV_VERSION 1
+ uint16_t command;
+};
+
/* Zebra IPv4 route message API. */
struct zapi_ipv4
{
diff --git a/lib/zebra.h b/lib/zebra.h
index cf7998f2..00f13f57 100644
--- a/lib/zebra.h
+++ b/lib/zebra.h
@@ -397,6 +397,12 @@ struct in_pktinfo
#define ZEBRA_ROUTER_ID_UPDATE 22
#define ZEBRA_MESSAGE_MAX 23
+/* Marker value used in new Zserv, in the byte location corresponding
+ * the command value in the old zserv header. To allow old and new
+ * Zserv headers to be distinguished from each other.
+ */
+#define ZEBRA_HEADER_MARKER 255
+
/* Zebra route's types. */
#define ZEBRA_ROUTE_SYSTEM 0
#define ZEBRA_ROUTE_KERNEL 1
@@ -493,9 +499,9 @@ extern char zebra_route_char(unsigned int route_type);
typedef u_int16_t afi_t;
typedef u_int8_t safi_t;
-/* Zebra types. */
+/* Zebra types. Used in Zserv message header. */
typedef u_int16_t zebra_size_t;
-typedef u_int8_t zebra_command_t;
+typedef u_int16_t zebra_command_t;
/* FIFO -- first in first out structure and macros. */
struct fifo
diff --git a/zebra/ChangeLog b/zebra/ChangeLog
index 91cf5488..bcc83645 100644
--- a/zebra/ChangeLog
+++ b/zebra/ChangeLog
@@ -1,3 +1,7 @@
+2006-01-16 Paul Jakma <paul.jakma@sun.com>
+
+ * zserv.c: Read/write updated Zserv header.
+
2006-01-11 Paul Jakma <paul.jakma@sun.com>
* zserv.c: (zsend_interface_{add,delete,update}) if flags are
diff --git a/zebra/zserv.c b/zebra/zserv.c
index 35dd306e..f8bfcfaa 100644
--- a/zebra/zserv.c
+++ b/zebra/zserv.c
@@ -150,6 +150,16 @@ zebra_server_send_message(struct zserv *client)
return 0;
}
+static void
+zserv_create_header (struct stream *s, uint16_t cmd)
+{
+ /* length placeholder, caller can update */
+ stream_putw (s, ZEBRA_HEADER_SIZE);
+ stream_putc (s, ZEBRA_HEADER_MARKER);
+ stream_putc (s, ZSERV_VERSION);
+ stream_putw (s, cmd);
+}
+
/* Interface is added. Send ZEBRA_INTERFACE_ADD to client. */
/*
* This function is called in the following situations:
@@ -173,11 +183,8 @@ zsend_interface_add (struct zserv *client, struct interface *ifp)
s = client->obuf;
stream_reset (s);
- /* Place holder for size. */
- stream_putw (s, 0);
-
/* Message type. */
- stream_putc (s, ZEBRA_INTERFACE_ADD);
+ zserv_create_header (s, ZEBRA_INTERFACE_ADD);
/* Interface information. */
stream_put (s, ifp->name, INTERFACE_NAMSIZ);
@@ -214,12 +221,10 @@ zsend_interface_delete (struct zserv *client, struct interface *ifp)
s = client->obuf;
stream_reset (s);
-
- /* Packet length placeholder. */
- stream_putw (s, 0);
-
+
+ zserv_create_header (s, ZEBRA_INTERFACE_DELETE);
+
/* Interface information. */
- stream_putc (s, ZEBRA_INTERFACE_DELETE);
stream_put (s, ifp->name, INTERFACE_NAMSIZ);
stream_putl (s, ifp->ifindex);
stream_putc (s, ifp->status);
@@ -287,11 +292,8 @@ zsend_interface_address (int cmd, struct zserv *client,
s = client->obuf;
stream_reset (s);
-
- /* Place holder for size. */
- stream_putw (s, 0);
-
- stream_putc (s, cmd);
+
+ zserv_create_header (s, cmd);
stream_putl (s, ifp->ifindex);
/* Interface address flag. */
@@ -345,11 +347,7 @@ zsend_interface_update (int cmd, struct zserv *client, struct interface *ifp)
s = client->obuf;
stream_reset (s);
- /* Place holder for size. */
- stream_putw (s, 0);
-
- /* Zebra command. */
- stream_putc (s, cmd);
+ zserv_create_header (s, cmd);
/* Interface information. */
stream_put (s, ifp->name, INTERFACE_NAMSIZ);
@@ -403,12 +401,10 @@ zsend_route_multipath (int cmd, struct zserv *client, struct prefix *p,
s = client->obuf;
stream_reset (s);
-
- /* Place holder for size. */
- stream_putw (s, 0);
-
- /* Put command, type and nexthop. */
- stream_putc (s, cmd);
+
+ zserv_create_header (s, cmd);
+
+ /* Put type and nexthop. */
stream_putc (s, rib->type);
stream_putc (s, rib->flags);
@@ -523,8 +519,7 @@ zsend_ipv6_nexthop_lookup (struct zserv *client, struct in6_addr *addr)
stream_reset (s);
/* Fill in result. */
- stream_putw (s, 0);
- stream_putc (s, ZEBRA_IPV6_NEXTHOP_LOOKUP);
+ zserv_create_header (s, ZEBRA_IPV6_NEXTHOP_LOOKUP);
stream_put (s, &addr, 16);
if (rib)
@@ -588,8 +583,7 @@ zsend_ipv4_nexthop_lookup (struct zserv *client, struct in_addr addr)
stream_reset (s);
/* Fill in result. */
- stream_putw (s, 0);
- stream_putc (s, ZEBRA_IPV4_NEXTHOP_LOOKUP);
+ zserv_create_header (s, ZEBRA_IPV4_NEXTHOP_LOOKUP);
stream_put_in_addr (s, &addr);
if (rib)
@@ -647,8 +641,7 @@ zsend_ipv4_import_lookup (struct zserv *client, struct prefix_ipv4 *p)
stream_reset (s);
/* Fill in result. */
- stream_putw (s, 0);
- stream_putc (s, ZEBRA_IPV4_IMPORT_LOOKUP);
+ zserv_create_header (s, ZEBRA_IPV4_IMPORT_LOOKUP);
stream_put_in_addr (s, &p->prefix);
if (rib)
@@ -703,11 +696,8 @@ zsend_router_id_update (struct zserv *client, struct prefix *p)
s = client->obuf;
stream_reset (s);
- /* Place holder for size. */
- stream_putw (s, 0);
-
/* Message type. */
- stream_putc (s, ZEBRA_ROUTER_ID_UPDATE);
+ zserv_create_header (s, ZEBRA_ROUTER_ID_UPDATE);
/* Prefix information. */
stream_putc (s, p->family);
@@ -1171,8 +1161,8 @@ zebra_client_read (struct thread *thread)
int sock;
struct zserv *client;
size_t already;
- u_short length;
- u_char command;
+ uint16_t length, command;
+ uint8_t marker, version;
/* Get thread data. Reset reading thread because I'm running. */
sock = THREAD_FD (thread);
@@ -1210,9 +1200,19 @@ zebra_client_read (struct thread *thread)
/* Reset to read from the beginning of the incoming packet. */
stream_set_getp(client->ibuf, 0);
+ /* Fetch header values */
length = stream_getw (client->ibuf);
- command = stream_getc (client->ibuf);
+ marker = stream_getc (client->ibuf);
+ version = stream_getc (client->ibuf);
+ command = stream_getw (client->ibuf);
+ if (marker != ZEBRA_HEADER_MARKER || version != ZSERV_VERSION)
+ {
+ zlog_err("%s: socket %d version mismatch, marker %d, version %d",
+ __func__, sock, marker, version);
+ zebra_client_close (client);
+ return -1;
+ }
if (length < ZEBRA_HEADER_SIZE)
{
zlog_warn("%s: socket %d message length %u is less than header size %d",
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-29 03:35:29 +0000