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Better factoring and comments in route-bsd.c route_loop.

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david 2012-03-26 22:24:54 +00:00
parent aadc34efa3
commit d7af8ff3d0
1 changed files with 11 additions and 3 deletions
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14
libdnet-stripped/src/route-bsd.c
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@ -284,16 +284,23 @@ route_loop(route_t *r, route_handler callback, void *arg)
lim = buf + gp->gi_size; lim = buf + gp->gi_size;
next = buf + sizeof(giarg); next = buf + sizeof(giarg);
#endif #endif
/* This loop assumes that RTA_DST, RTA_GATEWAY, and RTA_NETMASK have the
* values, 1, 2, and 4 respectively. Cf. Unix Network Programming,
* p. 494, function get_rtaddrs. */
for (ret = 0; next < lim; next += rtm->rtm_msglen) { for (ret = 0; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next; rtm = (struct rt_msghdr *)next;
sa = (struct sockaddr *)(rtm + 1); sa = (struct sockaddr *)(rtm + 1);
if (addr_ston(sa, &entry.route_dst) < 0 || if ((rtm->rtm_addrs & RTA_DST) == 0)
(rtm->rtm_addrs & RTA_GATEWAY) == 0) /* Need a destination. */
continue;
if (addr_ston(sa, &entry.route_dst) < 0)
continue; continue;
if ((rtm->rtm_addrs & RTA_GATEWAY) == 0)
/* Need a gateway. */
continue;
sa = NEXTSA(sa); sa = NEXTSA(sa);
if (addr_ston(sa, &entry.route_gw) < 0) if (addr_ston(sa, &entry.route_gw) < 0)
continue; continue;
@ -307,6 +314,7 @@ route_loop(route_t *r, route_handler callback, void *arg)
if (addr_stob(sa, &entry.route_dst.addr_bits) < 0) if (addr_stob(sa, &entry.route_dst.addr_bits) < 0)
continue; continue;
} }
if ((ret = callback(&entry, arg)) != 0) if ((ret = callback(&entry, arg)) != 0)
break; break;
} }