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iproute: refactor multipath print

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Make printing of multipath attributes a function to improve
readability.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Stephen Hemminger 2018-02-07 09:10:16 -08:00 committed by David Ahern
parent a3484a9f20
commit f48e14880a
1 changed files with 63 additions and 53 deletions
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116
ip/iproute.c
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@ -545,6 +545,67 @@ static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
} }
} }
static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
struct rtattr *rta)
{
const struct rtnexthop *nh = RTA_DATA(rta);
int len = RTA_PAYLOAD(rta);
int first = 1;
while (len > sizeof(*nh)) {
struct rtattr *tb[RTA_MAX + 1];
if (nh->rtnh_len > len)
break;
if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
if (first) {
fprintf(fp, "Oifs: ");
first = 0;
} else {
fprintf(fp, " ");
}
} else
fprintf(fp, "%s\tnexthop ", _SL_);
if (nh->rtnh_len > sizeof(*nh)) {
parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
nh->rtnh_len - sizeof(*nh));
if (tb[RTA_ENCAP])
lwt_print_encap(fp,
tb[RTA_ENCAP_TYPE],
tb[RTA_ENCAP]);
if (tb[RTA_NEWDST])
print_rta_newdst(fp, r, tb[RTA_NEWDST]);
if (tb[RTA_GATEWAY])
print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
if (tb[RTA_VIA])
print_rta_via(fp, tb[RTA_VIA]);
if (tb[RTA_FLOW])
print_rta_flow(fp, tb[RTA_FLOW]);
}
if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
if (nh->rtnh_hops != 1)
fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
fprintf(fp, " ");
} else {
fprintf(fp, "dev %s ",
ll_index_to_name(nh->rtnh_ifindex));
if (r->rtm_family != AF_MPLS)
fprintf(fp, "weight %d ",
nh->rtnh_hops+1);
}
print_rt_flags(fp, nh->rtnh_flags);
len -= NLMSG_ALIGN(nh->rtnh_len);
nh = RTNH_NEXT(nh);
}
}
int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{ {
FILE *fp = (FILE *)arg; FILE *fp = (FILE *)arg;
@ -710,60 +771,9 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
fprintf(fp, "iif %s ", fprintf(fp, "iif %s ",
ll_index_to_name(rta_getattr_u32(tb[RTA_IIF]))); ll_index_to_name(rta_getattr_u32(tb[RTA_IIF])));
} }
if (tb[RTA_MULTIPATH]) {
struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
int first = 1;
len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); if (tb[RTA_MULTIPATH])
print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
for (;;) {
if (len < sizeof(*nh))
break;
if (nh->rtnh_len > len)
break;
if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
if (first) {
fprintf(fp, "Oifs: ");
first = 0;
} else {
fprintf(fp, " ");
}
} else
fprintf(fp, "%s\tnexthop ", _SL_);
if (nh->rtnh_len > sizeof(*nh)) {
parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
if (tb[RTA_ENCAP])
lwt_print_encap(fp,
tb[RTA_ENCAP_TYPE],
tb[RTA_ENCAP]);
if (tb[RTA_NEWDST])
print_rta_newdst(fp, r, tb[RTA_NEWDST]);
if (tb[RTA_GATEWAY])
print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
if (tb[RTA_VIA])
print_rta_via(fp, tb[RTA_VIA]);
if (tb[RTA_FLOW])
print_rta_flow(fp, tb[RTA_FLOW]);
}
if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
if (nh->rtnh_hops != 1)
fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
fprintf(fp, " ");
} else {
fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
if (r->rtm_family != AF_MPLS)
fprintf(fp, "weight %d ",
nh->rtnh_hops+1);
}
print_rt_flags(fp, nh->rtnh_flags);
len -= NLMSG_ALIGN(nh->rtnh_len);
nh = RTNH_NEXT(nh);
}
}
if (tb[RTA_PREF]) if (tb[RTA_PREF])
print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF])); print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));