[gPXE] [PATCH 3/4] [proto] Remove unsupported IGMP protocol
Stefan Hajnoczi
stefanha at gmail.com
Sat Jan 30 05:15:19 EST 2010
The IGMP code came from legacy Etherboot and was never updated to work
as a gPXE protocol. There has been no demand for this protocol, so this
patch removes it.
Signed-off-by: Stefan Hajnoczi <stefanha at gmail.com>
---
src/core/main.c | 1 -
src/include/gpxe/in.h | 1 -
src/include/igmp.h | 42 ------------
src/proto/igmp.c | 167 -------------------------------------------------
4 files changed, 0 insertions(+), 211 deletions(-)
delete mode 100644 src/include/igmp.h
delete mode 100644 src/proto/igmp.c
diff --git a/src/core/main.c b/src/core/main.c
index ec052b0..d07d24c 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -9,7 +9,6 @@ Literature dealing with the network protocols:
DHCP - RFC2131, RFC2132 (options)
TFTP - RFC1350, RFC2347 (options), RFC2348 (blocksize), RFC2349 (tsize)
RPC - RFC1831, RFC1832 (XDR), RFC1833 (rpcbind/portmapper)
- IGMP - RFC1112
**************************************************************************/
diff --git a/src/include/gpxe/in.h b/src/include/gpxe/in.h
index 7027114..c313717 100644
--- a/src/include/gpxe/in.h
+++ b/src/include/gpxe/in.h
@@ -9,7 +9,6 @@ FILE_LICENCE ( GPL2_OR_LATER );
/* Protocol numbers */
#define IP_ICMP 1
-#define IP_IGMP 2
#define IP_TCP 6
#define IP_UDP 17
#define IP_ICMP6 58
diff --git a/src/include/igmp.h b/src/include/igmp.h
deleted file mode 100644
index 8b3292f..0000000
--- a/src/include/igmp.h
+++ /dev/null
@@ -1,42 +0,0 @@
-#ifndef IGMP_H
-#define IGMP_H
-
-#include "stdint.h"
-#include <gpxe/in.h>
-
-#define IGMP_QUERY 0x11
-#define IGMPv1_REPORT 0x12
-#define IGMPv2_REPORT 0x16
-#define IGMP_LEAVE 0x17
-#define GROUP_ALL_HOSTS 0xe0000001 /* 224.0.0.1 Host byte order */
-
-#define MULTICAST_MASK 0xf0000000
-#define MULTICAST_NETWORK 0xe0000000
-
-enum {
- IGMP_SERVER,
- MAX_IGMP
-};
-
-struct igmp {
- uint8_t type;
- uint8_t response_time;
- uint16_t chksum;
- struct in_addr group;
-} PACKED;
-
-struct igmp_ip_t { /* Format of an igmp ip packet */
- struct iphdr ip;
- uint8_t router_alert[4]; /* Router alert option */
- struct igmp igmp;
-} PACKED;
-
-struct igmptable_t {
- struct in_addr group;
- unsigned long time;
-} PACKED;
-
-extern void join_group ( int slot, unsigned long group );
-extern void leave_group ( int slot );
-
-#endif /* IGMP_H */
diff --git a/src/proto/igmp.c b/src/proto/igmp.c
deleted file mode 100644
index d711421..0000000
--- a/src/proto/igmp.c
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
- * Eric Biederman wrote this code originally.
- *
- */
-
-#if 0
-
-#include <ip.h>
-#include <igmp.h>
-
-static unsigned long last_igmpv1 = 0;
-static struct igmptable_t igmptable[MAX_IGMP];
-
-static long rfc1112_sleep_interval ( long base, int exp ) {
- unsigned long divisor, tmo;
-
- if ( exp > BACKOFF_LIMIT )
- exp = BACKOFF_LIMIT;
- divisor = RAND_MAX / ( base << exp );
- tmo = random() / divisor;
- return tmo;
-}
-
-static void send_igmp_reports ( unsigned long now ) {
- struct igmp_ip_t igmp;
- int i;
-
- for ( i = 0 ; i < MAX_IGMP ; i++ ) {
- if ( ! igmptable[i].time )
- continue;
- if ( now < igmptable[i].time )
- continue;
-
- igmp.router_alert[0] = 0x94;
- igmp.router_alert[1] = 0x04;
- igmp.router_alert[2] = 0;
- igmp.router_alert[3] = 0;
- build_ip_hdr ( igmptable[i].group.s_addr, 1, IP_IGMP,
- sizeof ( igmp.router_alert ),
- sizeof ( igmp ), &igmp );
- igmp.igmp.type = IGMPv2_REPORT;
- if ( last_igmpv1 &&
- ( now < last_igmpv1 + IGMPv1_ROUTER_PRESENT_TIMEOUT ) ) {
- igmp.igmp.type = IGMPv1_REPORT;
- }
- igmp.igmp.response_time = 0;
- igmp.igmp.chksum = 0;
- igmp.igmp.group.s_addr = igmptable[i].group.s_addr;
- igmp.igmp.chksum = ipchksum ( &igmp.igmp,
- sizeof ( igmp.igmp ) );
- ip_transmit ( sizeof ( igmp ), &igmp );
- DBG ( "IGMP sent report to %s\n", inet_ntoa ( igmp.igmp.group ) );
- /* Don't send another igmp report until asked */
- igmptable[i].time = 0;
- }
-}
-
-static void process_igmp ( unsigned long now, unsigned short ptype __unused,
- struct iphdr *ip ) {
- struct igmp *igmp;
- int i;
- unsigned iplen;
-
- if ( ( ! ip ) || ( ip->protocol != IP_IGMP ) ||
- ( nic.packetlen < ( sizeof ( struct iphdr ) +
- sizeof ( struct igmp ) ) ) ) {
- return;
- }
-
- iplen = ( ip->verhdrlen & 0xf ) * 4;
- igmp = ( struct igmp * ) &nic.packet[ sizeof( struct iphdr ) ];
- if ( ipchksum ( igmp, ntohs ( ip->len ) - iplen ) != 0 )
- return;
-
- if ( ( igmp->type == IGMP_QUERY ) &&
- ( ip->dest.s_addr == htonl ( GROUP_ALL_HOSTS ) ) ) {
- unsigned long interval = IGMP_INTERVAL;
-
- if ( igmp->response_time == 0 ) {
- last_igmpv1 = now;
- } else {
- interval = ( igmp->response_time * TICKS_PER_SEC ) /10;
- }
-
- DBG ( "IGMP received query for %s\n", inet_ntoa ( igmp->group ) );
- for ( i = 0 ; i < MAX_IGMP ; i++ ) {
- uint32_t group = igmptable[i].group.s_addr;
- if ( ( group == 0 ) ||
- ( group == igmp->group.s_addr ) ) {
- unsigned long time;
- time = currticks() +
- rfc1112_sleep_interval ( interval, 0 );
- if ( time < igmptable[i].time ) {
- igmptable[i].time = time;
- }
- }
- }
- }
- if ( ( ( igmp->type == IGMPv1_REPORT ) ||
- ( igmp->type == IGMPv2_REPORT ) ) &&
- ( ip->dest.s_addr == igmp->group.s_addr ) ) {
- DBG ( "IGMP received report for %s\n",
- inet_ntoa ( igmp->group ) );
- for ( i = 0 ; i < MAX_IGMP ; i++ ) {
- if ( ( igmptable[i].group.s_addr ==
- igmp->group.s_addr ) &&
- ( igmptable[i].time != 0 ) ) {
- igmptable[i].time = 0;
- }
- }
- }
-}
-
-struct background igmp_background __background = {
- .send = send_igmp_reports,
- .process = process_igmp,
-};
-
-void leave_group ( int slot ) {
- /* Be very stupid and always send a leave group message if
- * I have subscribed. Imperfect but it is standards
- * compliant, easy and reliable to implement.
- *
- * The optimal group leave method is to only send leave when,
- * we were the last host to respond to a query on this group,
- * and igmpv1 compatibility is not enabled.
- */
- if ( igmptable[slot].group.s_addr ) {
- struct igmp_ip_t igmp;
-
- igmp.router_alert[0] = 0x94;
- igmp.router_alert[1] = 0x04;
- igmp.router_alert[2] = 0;
- igmp.router_alert[3] = 0;
- build_ip_hdr ( htonl ( GROUP_ALL_HOSTS ), 1, IP_IGMP,
- sizeof ( igmp.router_alert ), sizeof ( igmp ),
- &igmp);
- igmp.igmp.type = IGMP_LEAVE;
- igmp.igmp.response_time = 0;
- igmp.igmp.chksum = 0;
- igmp.igmp.group.s_addr = igmptable[slot].group.s_addr;
- igmp.igmp.chksum = ipchksum ( &igmp.igmp, sizeof ( igmp ) );
- ip_transmit ( sizeof ( igmp ), &igmp );
- DBG ( "IGMP left group %s\n", inet_ntoa ( igmp.igmp.group ) );
- }
- memset ( &igmptable[slot], 0, sizeof ( igmptable[0] ) );
-}
-
-void join_group ( int slot, unsigned long group ) {
- /* I have already joined */
- if ( igmptable[slot].group.s_addr == group )
- return;
- if ( igmptable[slot].group.s_addr ) {
- leave_group ( slot );
- }
- /* Only join a group if we are given a multicast ip, this way
- * code can be given a non-multicast (broadcast or unicast ip)
- * and still work...
- */
- if ( ( group & htonl ( MULTICAST_MASK ) ) ==
- htonl ( MULTICAST_NETWORK ) ) {
- igmptable[slot].group.s_addr = group;
- igmptable[slot].time = currticks();
- }
-}
-
-#endif
--
1.6.5
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