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[IPV4]: multicast API "join" issues

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1) In the full-state API when imsf_numsrc == 0
   errno should be "0", but returns EADDRNOTAVAIL

2) An illegal filter mode change
   errno should be EINVAL, but returns EADDRNOTAVAIL

3) Trying to do an any-source option without IP_ADD_MEMBERSHIP
   errno should be EINVAL, but returns EADDRNOTAVAIL

4) Adds comments for the less obvious error return values

Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David L Stevens 2005-07-08 17:45:16 -07:00 committed by David S. Miller
parent 8cdaaa15da
commit 917f2f105e
2 changed files with 24 additions and 12 deletions
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18
net/ipv4/igmp.c
View file

@ -1748,12 +1748,16 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct
&& pmc->multi.imr_ifindex == imr.imr_ifindex)
break;
}
if (!pmc) /* must have a prior join */
if (!pmc) { /* must have a prior join */
err = -EINVAL;
goto done;
}
/* if a source filter was set, must be the same mode as before */
if (pmc->sflist) {
if (pmc->sfmode != omode)
if (pmc->sfmode != omode) {
err = -EINVAL;
goto done;
}
} else if (pmc->sfmode != omode) {
/* allow mode switches for empty-set filters */
ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 0, NULL, 0);
@ -1765,7 +1769,7 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct
psl = pmc->sflist;
if (!add) {
if (!psl)
goto done;
goto done; /* err = -EADDRNOTAVAIL */
rv = !0;
for (i=0; i<psl->sl_count; i++) {
rv = memcmp(&psl->sl_addr[i], &mreqs->imr_sourceaddr,
@ -1774,7 +1778,7 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct
break;
}
if (rv) /* source not found */
goto done;
goto done; /* err = -EADDRNOTAVAIL */
/* special case - (INCLUDE, empty) == LEAVE_GROUP */
if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
@ -1870,15 +1874,16 @@ int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex)
err = -ENODEV;
goto done;
}
err = -EADDRNOTAVAIL;
for (pmc=inet->mc_list; pmc; pmc=pmc->next) {
if (pmc->multi.imr_multiaddr.s_addr == msf->imsf_multiaddr &&
pmc->multi.imr_ifindex == imr.imr_ifindex)
break;
}
if (!pmc) /* must have a prior join */
if (!pmc) { /* must have a prior join */
err = -EINVAL;
goto done;
}
if (msf->imsf_numsrc) {
newpsl = (struct ip_sf_socklist *)sock_kmalloc(sk,
IP_SFLSIZE(msf->imsf_numsrc), GFP_KERNEL);
@ -1907,6 +1912,7 @@ int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex)
0, NULL, 0);
pmc->sflist = newpsl;
pmc->sfmode = msf->imsf_fmode;
err = 0;
done:
rtnl_shunlock();
return err;

18
net/ipv6/mcast.c
View file

@ -386,12 +386,16 @@ int ip6_mc_source(int add, int omode, struct sock *sk,
if (ipv6_addr_equal(&pmc->addr, group))
break;
}
if (!pmc) /* must have a prior join */
if (!pmc) { /* must have a prior join */
err = -EINVAL;
goto done;
}
/* if a source filter was set, must be the same mode as before */
if (pmc->sflist) {
if (pmc->sfmode != omode)
if (pmc->sfmode != omode) {
err = -EINVAL;
goto done;
}
} else if (pmc->sfmode != omode) {
/* allow mode switches for empty-set filters */
ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
@ -402,7 +406,7 @@ int ip6_mc_source(int add, int omode, struct sock *sk,
psl = pmc->sflist;
if (!add) {
if (!psl)
goto done;
goto done; /* err = -EADDRNOTAVAIL */
rv = !0;
for (i=0; i<psl->sl_count; i++) {
rv = memcmp(&psl->sl_addr[i], source,
@ -411,7 +415,7 @@ int ip6_mc_source(int add, int omode, struct sock *sk,
break;
}
if (rv) /* source not found */
goto done;
goto done; /* err = -EADDRNOTAVAIL */
/* special case - (INCLUDE, empty) == LEAVE_GROUP */
if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
@ -503,7 +507,6 @@ int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
if (!idev)
return -ENODEV;
dev = idev->dev;
err = -EADDRNOTAVAIL;
for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
if (pmc->ifindex != gsf->gf_interface)
@ -511,8 +514,10 @@ int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
if (ipv6_addr_equal(&pmc->addr, group))
break;
}
if (!pmc) /* must have a prior join */
if (!pmc) { /* must have a prior join */
err = -EINVAL;
goto done;
}
if (gsf->gf_numsrc) {
newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
IP6_SFLSIZE(gsf->gf_numsrc), GFP_ATOMIC);
@ -544,6 +549,7 @@ int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
(void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
pmc->sflist = newpsl;
pmc->sfmode = gsf->gf_fmode;
err = 0;
done:
read_unlock_bh(&idev->lock);
in6_dev_put(idev);