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SO_REUSEPORT may be defined, but not supported.

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This commit is contained in:
Simon Kelley
2013-04-02 17:02:58 +01:00
parent 5b37aa8c19
commit 56a1142f03
3 changed files with 30 additions and 9 deletions
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16
src/dhcp.c
View File

@@ -65,14 +65,22 @@ static int make_fd(int port)
/* When bind-interfaces is set, there might be more than one dnmsasq
instance binding port 67. That's OK if they serve different networks.
Need to set REUSEADDR to make this posible, or REUSEPORT on *BSD. */
Need to set REUSEADDR|REUSEPORT to make this posible.
Handle the case that REUSEPORT is defined, but the kernel doesn't
support it. This handles the introduction of REUSEPORT on Linux. */
if (option_bool(OPT_NOWILD) || option_bool(OPT_CLEVERBIND))
{
int rc = -1, porterr = 0;
#ifdef SO_REUSEPORT
int rc = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &oneopt, sizeof(oneopt));
#else
int rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &oneopt, sizeof(oneopt));
if ((rc = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &oneopt, sizeof(oneopt))) == -1 &&
errno != ENOPROTOOPT)
porterr = 1;
#endif
if (rc == -1 && !porterr)
rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &oneopt, sizeof(oneopt));
if (rc == -1)
die(_("failed to set SO_REUSE{ADDR|PORT} on DHCP socket: %s"), NULL, EC_BADNET);
}

18
src/dhcp6.c
View File

@@ -48,16 +48,24 @@ void dhcp6_init(void)
!set_ipv6pktinfo(fd))
die (_("cannot create DHCPv6 socket: %s"), NULL, EC_BADNET);
/* When bind-interfaces is set, there might be more than one dnmsasq
/* When bind-interfaces is set, there might be more than one dnmsasq
instance binding port 547. That's OK if they serve different networks.
Need to set REUSEADDR to make this posible, or REUSEPORT on *BSD. */
Need to set REUSEADDR|REUSEPORT to make this posible.
Handle the case that REUSEPORT is defined, but the kernel doesn't
support it. This handles the introduction of REUSEPORT on Linux. */
if (option_bool(OPT_NOWILD) || option_bool(OPT_CLEVERBIND))
{
int rc = -1, porterr = 0;
#ifdef SO_REUSEPORT
int rc = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &oneopt, sizeof(oneopt));
#else
int rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &oneopt, sizeof(oneopt));
if ((rc = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &oneopt, sizeof(oneopt))) == -1 &&
errno != ENOPROTOOPT)
porterr = 1;
#endif
if (rc == -1 && !porterr)
rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &oneopt, sizeof(oneopt));
if (rc == -1)
die(_("failed to set SO_REUSE{ADDR|PORT} on DHCPv6 socket: %s"), NULL, EC_BADNET);
}