diff options
| author | Gert Doering | 2020-09-13 16:56:21 +0200 |
|---|---|---|
| committer | Gert Doering | 2020-09-14 09:19:21 +0200 |
| commit | 9a695902402faafa343783c38761c4c0ccbb2b83 (patch) | |
| tree | 0da1ceb9117ed5e1603d6a782e2a7ee7fc693270 /src | |
| parent | 5382bdbfbfb9ac26c7c75bc967af86db352b54b3 (diff) | |
| download | openvpn-9a695902402faafa343783c38761c4c0ccbb2b83.zip openvpn-9a695902402faafa343783c38761c4c0ccbb2b83.tar.gz | |
Fix --show-gateway for IPv6 on NetBSD/i386.
Our ROUNDUP() macro to achieve the required system-specific alignment
for data structures sent to the routing socket was wrong for NetBSD -
unlike OpenBSD/FreeBSD, NetBSD is not using "long" (32/64 bit depending
on OS architecture), and not "uint32_t" either (32/32) like MacOS, but
uint64_t.
So our use of "long" always worked on NetBSD/amd64 and stopped working
on NetBSD/i386 when this was changed on the OS side...
NetBSD conveniently exports a RT_ROUNDUP() macro from <net/route.h> - use
that, and avoid trying to second-guess OS requirements.
While at it, add M_ERRNO to ominous "GDG6: problem writing to routing
socket"
error message to differenciate between "EINVAL" and other errors.
Trac: #734
Signed-off-by: Gert Doering <gert@greenie.net>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20200913145621.12125-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg20983.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit 37aab49b083a9e385970e3ab2dd727ea1a95ff35)
Diffstat (limited to 'src')
| -rw-r--r-- | src/openvpn/route.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/openvpn/route.c b/src/openvpn/route.c index 3c94a86..bd6b968 100644 --- a/src/openvpn/route.c +++ b/src/openvpn/route.c @@ -49,6 +49,10 @@ #include <linux/rtnetlink.h> /* RTM_GETROUTE etc. */ #endif +#if defined(TARGET_NETBSD) +#include <net/route.h> /* RT_ROUNDUP(), RT_ADVANCE() */ +#endif + #ifdef _WIN32 #include "openvpn-msg.h" @@ -3412,11 +3416,15 @@ struct rtmsg { /* the route socket code is identical for all 4 supported BSDs and for * MacOS X (Darwin), with one crucial difference: when going from - * 32 bit to 64 bit, the BSDs increased the structure size but kept + * 32 bit to 64 bit, FreeBSD/OpenBSD increased the structure size but kept * source code compatibility by keeping the use of "long", while * MacOS X decided to keep binary compatibility by *changing* the API * to use "uint32_t", thus 32 bit on all OS X variants * + * NetBSD does the MacOS way of "fixed number of bits, no matter if + * 32 or 64 bit OS", but chose uint64_t. For maximum portability, we + * just use the OS RT_ROUNDUP() macro, which is guaranteed to be correct. + * * We used to have a large amount of duplicate code here which really * differed only in this (long) vs. (uint32_t) - IMHO, worse than * having a combined block for all BSDs with this single #ifdef inside @@ -3425,6 +3433,8 @@ struct rtmsg { #if defined(TARGET_DARWIN) #define ROUNDUP(a) \ ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t)) +#elif defined(TARGET_NETBSD) +#define ROUNDUP(a) RT_ROUNDUP(a) #else #define ROUNDUP(a) \ ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) @@ -3733,7 +3743,7 @@ get_default_gateway_ipv6(struct route_ipv6_gateway_info *rgi6, } if (write(sockfd, (char *)&m_rtmsg, l) < 0) { - msg(M_WARN, "GDG6: problem writing to routing socket"); + msg(M_WARN|M_ERRNO, "GDG6: problem writing to routing socket"); goto done; } |