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[proto] Remove unsupported IGMP protocol
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@gmail.com> Signed-off-by: Marty Connor <mdc@etherboot.org>
This commit is contained in:
Stefan Hajnoczi
Marty Connor
parent
1548189ffa
commit
00a780e38f
@ -9,7 +9,6 @@ Literature dealing with the network protocols:
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DHCP - RFC2131, RFC2132 (options)
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TFTP - RFC1350, RFC2347 (options), RFC2348 (blocksize), RFC2349 (tsize)
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RPC - RFC1831, RFC1832 (XDR), RFC1833 (rpcbind/portmapper)
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IGMP - RFC1112
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**************************************************************************/
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@ -9,7 +9,6 @@ FILE_LICENCE ( GPL2_OR_LATER );
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/* Protocol numbers */
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#define IP_ICMP 1
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#define IP_IGMP 2
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#define IP_TCP 6
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#define IP_UDP 17
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#define IP_ICMP6 58
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@ -1,42 +0,0 @@
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#ifndef IGMP_H
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#define IGMP_H
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#include "stdint.h"
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#include <gpxe/in.h>
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#define IGMP_QUERY 0x11
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#define IGMPv1_REPORT 0x12
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#define IGMPv2_REPORT 0x16
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#define IGMP_LEAVE 0x17
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#define GROUP_ALL_HOSTS 0xe0000001 /* 224.0.0.1 Host byte order */
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#define MULTICAST_MASK 0xf0000000
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#define MULTICAST_NETWORK 0xe0000000
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enum {
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IGMP_SERVER,
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MAX_IGMP
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};
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struct igmp {
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uint8_t type;
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uint8_t response_time;
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uint16_t chksum;
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struct in_addr group;
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} PACKED;
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struct igmp_ip_t { /* Format of an igmp ip packet */
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struct iphdr ip;
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uint8_t router_alert[4]; /* Router alert option */
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struct igmp igmp;
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} PACKED;
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struct igmptable_t {
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struct in_addr group;
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unsigned long time;
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} PACKED;
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extern void join_group ( int slot, unsigned long group );
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extern void leave_group ( int slot );
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#endif /* IGMP_H */
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167
src/proto/igmp.c
167
src/proto/igmp.c
@ -1,167 +0,0 @@
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/*
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* Eric Biederman wrote this code originally.
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*
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*/
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#if 0
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#include <ip.h>
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#include <igmp.h>
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static unsigned long last_igmpv1 = 0;
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static struct igmptable_t igmptable[MAX_IGMP];
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static long rfc1112_sleep_interval ( long base, int exp ) {
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unsigned long divisor, tmo;
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if ( exp > BACKOFF_LIMIT )
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exp = BACKOFF_LIMIT;
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divisor = RAND_MAX / ( base << exp );
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tmo = random() / divisor;
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return tmo;
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}
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static void send_igmp_reports ( unsigned long now ) {
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struct igmp_ip_t igmp;
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int i;
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for ( i = 0 ; i < MAX_IGMP ; i++ ) {
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if ( ! igmptable[i].time )
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continue;
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if ( now < igmptable[i].time )
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continue;
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igmp.router_alert[0] = 0x94;
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igmp.router_alert[1] = 0x04;
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igmp.router_alert[2] = 0;
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igmp.router_alert[3] = 0;
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build_ip_hdr ( igmptable[i].group.s_addr, 1, IP_IGMP,
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sizeof ( igmp.router_alert ),
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sizeof ( igmp ), &igmp );
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igmp.igmp.type = IGMPv2_REPORT;
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if ( last_igmpv1 &&
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( now < last_igmpv1 + IGMPv1_ROUTER_PRESENT_TIMEOUT ) ) {
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igmp.igmp.type = IGMPv1_REPORT;
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}
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igmp.igmp.response_time = 0;
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igmp.igmp.chksum = 0;
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igmp.igmp.group.s_addr = igmptable[i].group.s_addr;
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igmp.igmp.chksum = ipchksum ( &igmp.igmp,
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sizeof ( igmp.igmp ) );
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ip_transmit ( sizeof ( igmp ), &igmp );
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DBG ( "IGMP sent report to %s\n", inet_ntoa ( igmp.igmp.group ) );
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/* Don't send another igmp report until asked */
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igmptable[i].time = 0;
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}
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}
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static void process_igmp ( unsigned long now, unsigned short ptype __unused,
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struct iphdr *ip ) {
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struct igmp *igmp;
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int i;
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unsigned iplen;
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if ( ( ! ip ) || ( ip->protocol != IP_IGMP ) ||
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( nic.packetlen < ( sizeof ( struct iphdr ) +
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sizeof ( struct igmp ) ) ) ) {
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return;
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}
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iplen = ( ip->verhdrlen & 0xf ) * 4;
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igmp = ( struct igmp * ) &nic.packet[ sizeof( struct iphdr ) ];
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if ( ipchksum ( igmp, ntohs ( ip->len ) - iplen ) != 0 )
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return;
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if ( ( igmp->type == IGMP_QUERY ) &&
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( ip->dest.s_addr == htonl ( GROUP_ALL_HOSTS ) ) ) {
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unsigned long interval = IGMP_INTERVAL;
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if ( igmp->response_time == 0 ) {
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last_igmpv1 = now;
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} else {
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interval = ( igmp->response_time * TICKS_PER_SEC ) /10;
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}
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DBG ( "IGMP received query for %s\n", inet_ntoa ( igmp->group ) );
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for ( i = 0 ; i < MAX_IGMP ; i++ ) {
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uint32_t group = igmptable[i].group.s_addr;
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if ( ( group == 0 ) ||
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( group == igmp->group.s_addr ) ) {
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unsigned long time;
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time = currticks() +
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rfc1112_sleep_interval ( interval, 0 );
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if ( time < igmptable[i].time ) {
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igmptable[i].time = time;
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}
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}
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}
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}
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if ( ( ( igmp->type == IGMPv1_REPORT ) ||
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( igmp->type == IGMPv2_REPORT ) ) &&
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( ip->dest.s_addr == igmp->group.s_addr ) ) {
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DBG ( "IGMP received report for %s\n",
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inet_ntoa ( igmp->group ) );
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for ( i = 0 ; i < MAX_IGMP ; i++ ) {
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if ( ( igmptable[i].group.s_addr ==
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igmp->group.s_addr ) &&
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( igmptable[i].time != 0 ) ) {
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igmptable[i].time = 0;
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}
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}
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}
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}
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struct background igmp_background __background = {
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.send = send_igmp_reports,
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.process = process_igmp,
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};
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void leave_group ( int slot ) {
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/* Be very stupid and always send a leave group message if
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* I have subscribed. Imperfect but it is standards
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* compliant, easy and reliable to implement.
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*
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* The optimal group leave method is to only send leave when,
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* we were the last host to respond to a query on this group,
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* and igmpv1 compatibility is not enabled.
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*/
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if ( igmptable[slot].group.s_addr ) {
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struct igmp_ip_t igmp;
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igmp.router_alert[0] = 0x94;
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igmp.router_alert[1] = 0x04;
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igmp.router_alert[2] = 0;
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igmp.router_alert[3] = 0;
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build_ip_hdr ( htonl ( GROUP_ALL_HOSTS ), 1, IP_IGMP,
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sizeof ( igmp.router_alert ), sizeof ( igmp ),
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&igmp);
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igmp.igmp.type = IGMP_LEAVE;
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igmp.igmp.response_time = 0;
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igmp.igmp.chksum = 0;
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igmp.igmp.group.s_addr = igmptable[slot].group.s_addr;
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igmp.igmp.chksum = ipchksum ( &igmp.igmp, sizeof ( igmp ) );
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ip_transmit ( sizeof ( igmp ), &igmp );
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DBG ( "IGMP left group %s\n", inet_ntoa ( igmp.igmp.group ) );
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}
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memset ( &igmptable[slot], 0, sizeof ( igmptable[0] ) );
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}
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void join_group ( int slot, unsigned long group ) {
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/* I have already joined */
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if ( igmptable[slot].group.s_addr == group )
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return;
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if ( igmptable[slot].group.s_addr ) {
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leave_group ( slot );
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}
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/* Only join a group if we are given a multicast ip, this way
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* code can be given a non-multicast (broadcast or unicast ip)
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* and still work...
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*/
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if ( ( group & htonl ( MULTICAST_MASK ) ) ==
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htonl ( MULTICAST_NETWORK ) ) {
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igmptable[slot].group.s_addr = group;
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igmptable[slot].time = currticks();
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}
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}
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#endif
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