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author | mdodd <mdodd@FreeBSD.org> | 2003-03-02 21:34:37 +0000 |
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committer | mdodd <mdodd@FreeBSD.org> | 2003-03-02 21:34:37 +0000 |
commit | cd4fafb346eda353b75a3fb1f4ba5b08a8f0e688 (patch) | |
tree | 029d8e13f59ab838fe4627ca66354af3d3e0b962 /sys/net/route.c | |
parent | 0a50041362fa551b46336f0c3c6d0faf524bc2d7 (diff) | |
download | FreeBSD-src-cd4fafb346eda353b75a3fb1f4ba5b08a8f0e688.zip FreeBSD-src-cd4fafb346eda353b75a3fb1f4ba5b08a8f0e688.tar.gz |
Reduce code duplication. This adds the function rt_check() to route.c.
Approved by: sam (in principle)
Diffstat (limited to 'sys/net/route.c')
-rw-r--r-- | sys/net/route.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/sys/net/route.c b/sys/net/route.c index 7847466..543151f 100644 --- a/sys/net/route.c +++ b/sys/net/route.c @@ -1131,5 +1131,56 @@ bad: return (error); } +int +rt_check(lrt, lrt0, dst) + struct rtentry **lrt; + struct rtentry **lrt0; + struct sockaddr *dst; +{ + struct rtentry *rt; + struct rtentry *rt0; + int error; + + rt = *lrt; + rt0 = *lrt0; + error = 0; + + rt = rt0; + + if (rt != NULL) { + if ((rt->rt_flags & RTF_UP) == 0) { + rt0 = rt = rtalloc1(dst, 1, 0UL); + if (rt0 != NULL) + rt->rt_refcnt--; + else + senderr(EHOSTUNREACH); + } + if (rt->rt_flags & RTF_GATEWAY) { + if (rt->rt_gwroute == NULL) + goto lookup; + + rt = rt->rt_gwroute; + if ((rt->rt_flags & RTF_UP) == 0) { + rtfree(rt); + rt = rt0; + lookup: + rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1, 0UL); + rt = rt->rt_gwroute; + if (rt == NULL) + senderr(EHOSTUNREACH); + } + } + if (rt->rt_flags & RTF_REJECT) + if (rt->rt_rmx.rmx_expire == 0 || + time_second < rt->rt_rmx.rmx_expire) + senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); + } + +bad: + *lrt = rt; + *lrt0 = rt0; + return (error); +} + /* This must be before ip6_init2(), which is now SI_ORDER_MIDDLE */ SYSINIT(route, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, route_init, 0); |