diff options
| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2017-09-10 16:02:05 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2017-09-10 16:04:31 +0200 |
| commit | 7d906d22cf1953641303966a756f3c44535001ae (patch) | |
| tree | 87d0e000164f7c13835efbb5a1d3b8f716bc5b07 /pfinet/linux-src/net/ipv4/tcp_ipv4.c | |
| parent | 973089f3832df9887259e1927f7ead800d9dd897 (diff) | |
| download | hurd-7d906d22cf1953641303966a756f3c44535001ae.tar.gz hurd-7d906d22cf1953641303966a756f3c44535001ae.tar.bz2 hurd-7d906d22cf1953641303966a756f3c44535001ae.zip | |
pfinet: select UDP/TCP ports randomly
* pfinet/linux-src/include/net/tcp.h (tcp_port_rover): Remove
declaration
* pfinet/linux-src/include/net/udp.h (udp_port_rover): Likewise.
* pfinet/linux-src/net/ipv4/tcp_ipv4.c (tcp_port_rover): Remove
variable.
(tcp_v4_get_port): Take port hint from net_random() instead of
tcp_port_rover.
* pfinet/linux-src/net/ipv4/udp.c (udp_port_rover, udp_v4_get_port):
Likewise.
* pfinet/linux-src/net/ipv6/tcp_ipv6.c (tcp_v6_get_port): Likewise.
* pfinet/linux-src/net/ipv6/udp_ipv6.c (udp_v6_get_port): Likewise.
Diffstat (limited to 'pfinet/linux-src/net/ipv4/tcp_ipv4.c')
| -rw-r--r-- | pfinet/linux-src/net/ipv4/tcp_ipv4.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/pfinet/linux-src/net/ipv4/tcp_ipv4.c b/pfinet/linux-src/net/ipv4/tcp_ipv4.c index df2c8b7c..8a5f7175 100644 --- a/pfinet/linux-src/net/ipv4/tcp_ipv4.c +++ b/pfinet/linux-src/net/ipv4/tcp_ipv4.c @@ -123,7 +123,6 @@ int sysctl_local_port_range[2] = { 1024, 4999 }; #else int sysctl_local_port_range[2] = { 32768, 61000 }; #endif -int tcp_port_rover = (1024 - 1); static __inline__ int tcp_hashfn(__u32 laddr, __u16 lport, __u32 faddr, __u16 fport) @@ -223,9 +222,9 @@ static int tcp_v4_get_port(struct sock *sk, unsigned short snum) SOCKHASH_LOCK(); if (snum == 0) { - int rover = tcp_port_rover; int low = sysctl_local_port_range[0]; int high = sysctl_local_port_range[1]; + int rover = net_random() % (high - low) + low; int remaining = (high - low) + 1; do { rover++; @@ -239,7 +238,6 @@ static int tcp_v4_get_port(struct sock *sk, unsigned short snum) next: ; /* Do nothing. */ } while (--remaining > 0); - tcp_port_rover = rover; /* Exhausted local port range during search? */ if (remaining <= 0) |