ipmr.c (7438189baa0a2fe30084bdc97e3d540ebc5444f3) ipmr.c (f77f13e22df4a40d237697df496152c8c37f3f2b)
1/*
2 * IP multicast routing support for mrouted 3.6/3.8
3 *
4 * (c) 1995 Alan Cox, <alan@lxorguk.ukuu.org.uk>
5 * Linux Consultancy and Custom Driver Development
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License

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17 * Malcolm Beattie : Buffer handling fixes.
18 * Alexey Kuznetsov : Double buffer free and other fixes.
19 * SVR Anand : Fixed several multicast bugs and problems.
20 * Alexey Kuznetsov : Status, optimisations and more.
21 * Brad Parker : Better behaviour on mrouted upcall
22 * overflow.
23 * Carlos Picoto : PIMv1 Support
24 * Pavlin Ivanov Radoslavov: PIMv2 Registers must checksum only PIM header
1/*
2 * IP multicast routing support for mrouted 3.6/3.8
3 *
4 * (c) 1995 Alan Cox, <alan@lxorguk.ukuu.org.uk>
5 * Linux Consultancy and Custom Driver Development
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License

--- 8 unchanged lines hidden (view full) ---

17 * Malcolm Beattie : Buffer handling fixes.
18 * Alexey Kuznetsov : Double buffer free and other fixes.
19 * SVR Anand : Fixed several multicast bugs and problems.
20 * Alexey Kuznetsov : Status, optimisations and more.
21 * Brad Parker : Better behaviour on mrouted upcall
22 * overflow.
23 * Carlos Picoto : PIMv1 Support
24 * Pavlin Ivanov Radoslavov: PIMv2 Registers must checksum only PIM header
25 * Relax this requrement to work with older peers.
25 * Relax this requirement to work with older peers.
26 *
27 */
28
29#include <asm/system.h>
30#include <asm/uaccess.h>
31#include <linux/types.h>
32#include <linux/capability.h>
33#include <linux/errno.h>

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797 return -ENOENT;
798}
799
800static int ipmr_mfc_add(struct net *net, struct mfcctl *mfc, int mrtsock)
801{
802 int line;
803 struct mfc_cache *uc, *c, **cp;
804
26 *
27 */
28
29#include <asm/system.h>
30#include <asm/uaccess.h>
31#include <linux/types.h>
32#include <linux/capability.h>
33#include <linux/errno.h>

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797 return -ENOENT;
798}
799
800static int ipmr_mfc_add(struct net *net, struct mfcctl *mfc, int mrtsock)
801{
802 int line;
803 struct mfc_cache *uc, *c, **cp;
804
805 if (mfc->mfcc_parent >= MAXVIFS)
806 return -ENFILE;
807
808 line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr);
809
810 for (cp = &net->ipv4.mfc_cache_array[line];
811 (c = *cp) != NULL; cp = &c->next) {
812 if (c->mfc_origin == mfc->mfcc_origin.s_addr &&
813 c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr)
814 break;
815 }

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1611#endif
1612
1613static int
1614ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm)
1615{
1616 int ct;
1617 struct rtnexthop *nhp;
1618 struct net *net = mfc_net(c);
805 line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr);
806
807 for (cp = &net->ipv4.mfc_cache_array[line];
808 (c = *cp) != NULL; cp = &c->next) {
809 if (c->mfc_origin == mfc->mfcc_origin.s_addr &&
810 c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr)
811 break;
812 }

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1608#endif
1609
1610static int
1611ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm)
1612{
1613 int ct;
1614 struct rtnexthop *nhp;
1615 struct net *net = mfc_net(c);
1616 struct net_device *dev = net->ipv4.vif_table[c->mfc_parent].dev;
1619 u8 *b = skb_tail_pointer(skb);
1620 struct rtattr *mp_head;
1621
1617 u8 *b = skb_tail_pointer(skb);
1618 struct rtattr *mp_head;
1619
1622 /* If cache is unresolved, don't try to parse IIF and OIF */
1623 if (c->mfc_parent > MAXVIFS)
1624 return -ENOENT;
1620 if (dev)
1621 RTA_PUT(skb, RTA_IIF, 4, &dev->ifindex);
1625
1622
1626 if (VIF_EXISTS(net, c->mfc_parent))
1627 RTA_PUT(skb, RTA_IIF, 4, &net->ipv4.vif_table[c->mfc_parent].dev->ifindex);
1628
1629 mp_head = (struct rtattr *)skb_put(skb, RTA_LENGTH(0));
1630
1631 for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) {
1623 mp_head = (struct rtattr *)skb_put(skb, RTA_LENGTH(0));
1624
1625 for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) {
1632 if (VIF_EXISTS(net, ct) && c->mfc_un.res.ttls[ct] < 255) {
1626 if (c->mfc_un.res.ttls[ct] < 255) {
1633 if (skb_tailroom(skb) < RTA_ALIGN(RTA_ALIGN(sizeof(*nhp)) + 4))
1634 goto rtattr_failure;
1635 nhp = (struct rtnexthop *)skb_put(skb, RTA_ALIGN(sizeof(*nhp)));
1636 nhp->rtnh_flags = 0;
1637 nhp->rtnh_hops = c->mfc_un.res.ttls[ct];
1638 nhp->rtnh_ifindex = net->ipv4.vif_table[ct].dev->ifindex;
1639 nhp->rtnh_len = sizeof(*nhp);
1640 }

--- 432 unchanged lines hidden --- 		1627 if (skb_tailroom(skb) < RTA_ALIGN(RTA_ALIGN(sizeof(*nhp)) + 4))
1628 goto rtattr_failure;
1629 nhp = (struct rtnexthop *)skb_put(skb, RTA_ALIGN(sizeof(*nhp)));
1630 nhp->rtnh_flags = 0;
1631 nhp->rtnh_hops = c->mfc_un.res.ttls[ct];
1632 nhp->rtnh_ifindex = net->ipv4.vif_table[ct].dev->ifindex;
1633 nhp->rtnh_len = sizeof(*nhp);
1634 }

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