aboutsummaryrefslogtreecommitdiffstats
path: root/net/ipv4/udp.c
diff options
context:
space:
mode:
authorGerrit Renker <gerrit@erg.abdn.ac.uk>2008-07-21 16:35:08 -0400
committerDavid S. Miller <davem@davemloft.net>2008-07-21 16:35:08 -0400
commit47112e25da41d9059626033986dc3353e101f815 (patch)
tree72857968c318960ba50a4cc7232041228e8361dc /net/ipv4/udp.c
parent6579e57b31d79d31d9b806e41ba48774e73257dc (diff)
udplite: Protection against coverage value wrap-around
This patch clamps the cscov setsockopt values to a maximum of 0xFFFF. Setsockopt values greater than 0xffff can cause an unwanted wrap-around. Further, IPv6 jumbograms are not supported (RFC 3838, 3.5), so that values greater than 0xffff are not even useful. Further changes: fixed a typo in the documentation. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp.c')
-rw-r--r--net/ipv4/udp.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index a751770947a3..383d17359d01 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1325,6 +1325,8 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
1325 return -ENOPROTOOPT; 1325 return -ENOPROTOOPT;
1326 if (val != 0 && val < 8) /* Illegal coverage: use default (8) */ 1326 if (val != 0 && val < 8) /* Illegal coverage: use default (8) */
1327 val = 8; 1327 val = 8;
1328 else if (val > USHORT_MAX)
1329 val = USHORT_MAX;
1328 up->pcslen = val; 1330 up->pcslen = val;
1329 up->pcflag |= UDPLITE_SEND_CC; 1331 up->pcflag |= UDPLITE_SEND_CC;
1330 break; 1332 break;
@@ -1337,6 +1339,8 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
1337 return -ENOPROTOOPT; 1339 return -ENOPROTOOPT;
1338 if (val != 0 && val < 8) /* Avoid silly minimal values. */ 1340 if (val != 0 && val < 8) /* Avoid silly minimal values. */
1339 val = 8; 1341 val = 8;
1342 else if (val > USHORT_MAX)
1343 val = USHORT_MAX;
1340 up->pcrlen = val; 1344 up->pcrlen = val;
1341 up->pcflag |= UDPLITE_RECV_CC; 1345 up->pcflag |= UDPLITE_RECV_CC;
1342 break; 1346 break;