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zebra: Refactor kernel_socket kernel_rtm_ipv4 and ipv6 functions
Refactor both v4 and v6 functions down to 1 install function. Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp
parent
9ba0e5706c
commit
08ea27d112
@ -114,8 +114,8 @@ static int sin6_masklen(struct in6_addr mask)
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#endif /* SIN6_LEN */
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/* Interface between zebra message and rtm message. */
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static int kernel_rtm_ipv4(int cmd, const struct prefix *p,
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const struct nexthop_group *ng, uint32_t metric)
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static int kernel_rtm(int cmd, const struct prefix *p,
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const struct nexthop_group *ng, uint32_t metric)
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{
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union sockunion *mask = NULL;
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@ -134,20 +134,33 @@ static int kernel_rtm_ipv4(int cmd, const struct prefix *p,
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if (IS_ZEBRA_DEBUG_RIB)
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prefix2str(p, prefix_buf, sizeof(prefix_buf));
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memset(&sin_dest, 0, sizeof(sin_dest));
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sin_dest.sin.sin_family = AF_INET;
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#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
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sin_dest.sin.sin_len = sizeof(sin_dest);
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#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
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sin_dest.sin.sin_addr = p->u.prefix4;
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memset(&sin_dest, 0, sizeof(sin_dest));
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memset(&sin_gate, 0, sizeof(sin_gate));
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memset(&sin_mask, 0, sizeof(sin_mask));
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memset(&sin_gate, 0, sizeof(sin_gate));
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sin_gate.sin.sin_family = AF_INET;
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switch (p->family) {
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case AF_INET:
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sin_dest.sin.sin_family = AF_INET;
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#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
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sin_gate.sin.sin_len = sizeof(sin_gate);
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sin_dest.sin.sin_len = sizeof(sin_dest);
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sin_gate.sin.sin_len = sizeof(sin_gate);
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#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
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sin_dest.sin.sin_addr = p->u.prefix4;
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sin_gate.sin.sin_family = AF_INET;
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break;
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case AF_INET6:
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sin_dest.sin6.sin6_family = AF_INET6;
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#ifdef SIN6_LEN
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sin_dest.sin6.sin6_len = sizeof(sin_dest);
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#endif /* SIN6_LEN */
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sin_dest.sin6.sin6_addr = p->u.prefix6;
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sin_gate.sin6.sin6_family = AF_INET6;
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#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
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sin_gate.sin6.sin6_len = sizeof(sin_gate);
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#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
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break;
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}
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/* Make gateway. */
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for (ALL_NEXTHOPS_PTR(ng, nexthop)) {
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@ -164,33 +177,85 @@ static int kernel_rtm_ipv4(int cmd, const struct prefix *p,
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*/
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if ((cmd == RTM_ADD && NEXTHOP_IS_ACTIVE(nexthop->flags))
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|| (cmd == RTM_DELETE)) {
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if (nexthop->type == NEXTHOP_TYPE_IPV4
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|| nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) {
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switch (nexthop->type) {
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case NEXTHOP_TYPE_IPV4:
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case NEXTHOP_TYPE_IPV4_IFINDEX:
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sin_gate.sin.sin_addr = nexthop->gate.ipv4;
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gate = 1;
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}
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if (nexthop->type == NEXTHOP_TYPE_IFINDEX
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|| nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX)
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sin_gate.sin.sin_family = AF_INET;
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ifindex = nexthop->ifindex;
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if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) {
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struct in_addr loopback;
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loopback.s_addr = htonl(INADDR_LOOPBACK);
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sin_gate.sin.sin_addr = loopback;
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bh_type = nexthop->bh_type;
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gate = 1;
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break;
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case NEXTHOP_TYPE_IPV6:
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case NEXTHOP_TYPE_IPV6_IFINDEX:
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sin_gate.sin6.sin6_addr = nexthop->gate.ipv6;
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sin_gate.sin6.sin6_family = AF_INET6;
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ifindex = nexthop->ifindex;
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/* Under kame set interface index to link local address */
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#ifdef KAME
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#define SET_IN6_LINKLOCAL_IFINDEX(a, i) \
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do { \
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(a).s6_addr[2] = ((i) >> 8) & 0xff; \
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(a).s6_addr[3] = (i)&0xff; \
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} while (0)
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if (IN6_IS_ADDR_LINKLOCAL(
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&sin_gate.sin6.sin6_addr))
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SET_IN6_LINKLOCAL_IFINDEX(
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sin_gate.sin6.sin6_addr,
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ifindex);
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#endif /* KAME */
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gate = 1;
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break;
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case NEXTHOP_TYPE_IFINDEX:
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ifindex = nexthop->ifindex;
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break;
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case NEXTHOP_TYPE_BLACKHOLE:
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bh_type = nexthop->bh_type;
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switch (p->family) {
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case AFI_IP: {
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struct in_addr loopback;
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loopback.s_addr =
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htonl(INADDR_LOOPBACK);
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sin_gate.sin.sin_addr = loopback;
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gate = 1;
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}
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break;
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case AFI_IP6:
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break;
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}
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}
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if (gate && p->prefixlen == 32)
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mask = NULL;
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else {
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masklen2ip(p->prefixlen,
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&sin_mask.sin.sin_addr);
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sin_mask.sin.sin_family = AF_INET;
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switch (p->family) {
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case AF_INET:
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if (gate && p->prefixlen == 32)
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mask = NULL;
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else {
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masklen2ip(p->prefixlen,
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&sin_mask.sin.sin_addr);
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sin_mask.sin.sin_family = AF_INET;
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#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
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sin_mask.sin.sin_len =
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sin_masklen(sin_mask.sin.sin_addr);
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sin_mask.sin.sin_len = sin_masklen(
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sin_mask.sin.sin_addr);
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#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
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mask = &sin_mask;
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mask = &sin_mask;
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}
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break;
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case AF_INET6:
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if (gate && p->prefixlen == 128)
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mask = NULL;
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else {
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masklen2ip6(p->prefixlen,
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&sin_mask.sin6.sin6_addr);
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sin_mask.sin6.sin6_family = AF_INET6;
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#ifdef SIN6_LEN
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sin_mask.sin6.sin6_len = sin6_masklen(
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sin_mask.sin6.sin6_addr);
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#endif /* SIN6_LEN */
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mask = &sin_mask;
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}
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break;
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}
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#ifdef __OpenBSD__
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@ -200,7 +265,6 @@ static int kernel_rtm_ipv4(int cmd, const struct prefix *p,
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continue;
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smplsp = (union sockunion *)&smpls;
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#endif
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error = rtm_write(cmd, &sin_dest, mask,
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gate ? &sin_gate : NULL, smplsp,
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ifindex, bh_type, metric);
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@ -211,33 +275,31 @@ static int kernel_rtm_ipv4(int cmd, const struct prefix *p,
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"%s: %s: attention! gate not found for re",
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__func__, prefix_buf);
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} else
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inet_ntop(AF_INET,
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inet_ntop(p->family == AFI_IP ? AF_INET
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: AF_INET6,
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&sin_gate.sin.sin_addr,
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gate_buf, INET_ADDRSTRLEN);
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}
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switch (error) {
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/* We only flag nexthops as being in FIB if rtm_write()
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* did its work. */
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/* We only flag nexthops as being in FIB if
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* rtm_write() did its work. */
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case ZEBRA_ERR_NOERROR:
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nexthop_num++;
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if (IS_ZEBRA_DEBUG_KERNEL)
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zlog_debug(
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"%s: %s: successfully did NH %s",
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__func__, prefix_buf, gate_buf);
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if (cmd == RTM_ADD)
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SET_FLAG(nexthop->flags,
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NEXTHOP_FLAG_FIB);
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SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB);
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break;
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/* The only valid case for this error is kernel's
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* failure to install
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* a multipath route, which is common for FreeBSD. This
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* should be
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* ignored silently, but logged as an error otherwise.
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*/
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/* The only valid case for this error is
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* kernel's failure to install a multipath
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* route, which is common for FreeBSD. This
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* should be
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* ignored silently, but logged as an error
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* otherwise.
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*/
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case ZEBRA_ERR_RTEXIST:
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if (cmd != RTM_ADD)
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flog_err(
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@ -246,7 +308,7 @@ static int kernel_rtm_ipv4(int cmd, const struct prefix *p,
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__func__, error, cmd);
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continue;
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/* Note any unexpected status returns */
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/* Note any unexpected status returns */
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default:
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flog_err(
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EC_LIB_SYSTEM_CALL,
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@ -277,125 +339,6 @@ static int kernel_rtm_ipv4(int cmd, const struct prefix *p,
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return 0; /*XXX*/
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}
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/* Interface between zebra message and rtm message. */
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static int kernel_rtm_ipv6(int cmd, const struct prefix *p,
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const struct nexthop_group *ng, uint32_t metric)
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{
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union sockunion *mask;
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union sockunion sin_dest, sin_mask, sin_gate;
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#ifdef __OpenBSD__
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struct sockaddr_mpls smpls;
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#endif
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union sockunion *smplsp = NULL;
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struct nexthop *nexthop;
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int nexthop_num = 0;
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ifindex_t ifindex = 0;
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int gate = 0;
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int error;
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enum blackhole_type bh_type = BLACKHOLE_UNSPEC;
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memset(&sin_dest, 0, sizeof(sin_dest));
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sin_dest.sin6.sin6_family = AF_INET6;
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#ifdef SIN6_LEN
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sin_dest.sin6.sin6_len = sizeof(sin_dest);
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#endif /* SIN6_LEN */
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sin_dest.sin6.sin6_addr = p->u.prefix6;
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memset(&sin_mask, 0, sizeof(sin_mask));
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memset(&sin_gate, 0, sizeof(sin_gate));
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sin_gate.sin6.sin6_family = AF_INET6;
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#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
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sin_gate.sin6.sin6_len = sizeof(sin_gate);
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#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
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/* Make gateway. */
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for (ALL_NEXTHOPS_PTR(ng, nexthop)) {
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if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE))
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continue;
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gate = 0;
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if ((cmd == RTM_ADD && NEXTHOP_IS_ACTIVE(nexthop->flags))
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|| (cmd == RTM_DELETE)) {
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if (nexthop->type == NEXTHOP_TYPE_IPV6
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|| nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) {
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sin_gate.sin6.sin6_addr = nexthop->gate.ipv6;
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gate = 1;
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}
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if (nexthop->type == NEXTHOP_TYPE_IFINDEX
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|| nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)
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ifindex = nexthop->ifindex;
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if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE)
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bh_type = nexthop->bh_type;
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}
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/* Under kame set interface index to link local address. */
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#ifdef KAME
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#define SET_IN6_LINKLOCAL_IFINDEX(a, i) \
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do { \
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(a).s6_addr[2] = ((i) >> 8) & 0xff; \
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(a).s6_addr[3] = (i)&0xff; \
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} while (0)
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if (gate && IN6_IS_ADDR_LINKLOCAL(&sin_gate.sin6.sin6_addr))
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SET_IN6_LINKLOCAL_IFINDEX(sin_gate.sin6.sin6_addr,
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ifindex);
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#endif /* KAME */
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if (gate && p->prefixlen == 128)
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mask = NULL;
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else {
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masklen2ip6(p->prefixlen, &sin_mask.sin6.sin6_addr);
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sin_mask.sin6.sin6_family = AF_INET6;
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#ifdef SIN6_LEN
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sin_mask.sin6.sin6_len =
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sin6_masklen(sin_mask.sin6.sin6_addr);
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#endif /* SIN6_LEN */
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mask = &sin_mask;
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}
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#ifdef __OpenBSD__
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if (nexthop->nh_label
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&& !kernel_rtm_add_labels(nexthop->nh_label, &smpls))
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continue;
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smplsp = (union sockunion *)&smpls;
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#endif
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error = rtm_write(cmd, &sin_dest, mask, gate ? &sin_gate : NULL,
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smplsp, ifindex, bh_type, metric);
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/* Update installed nexthop info on success */
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if ((cmd == RTM_ADD) && (error == ZEBRA_ERR_NOERROR))
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SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB);
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nexthop_num++;
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}
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/* If there is no useful nexthop then return. */
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if (nexthop_num == 0) {
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if (IS_ZEBRA_DEBUG_KERNEL)
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zlog_debug("kernel_rtm_ipv6(): No useful nexthop.");
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return 1;
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}
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return 0; /*XXX*/
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}
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static int kernel_rtm(int cmd, const struct prefix *p,
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const struct nexthop_group *ng, uint32_t metric)
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{
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switch (PREFIX_FAMILY(p)) {
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case AF_INET:
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return kernel_rtm_ipv4(cmd, p, ng, metric);
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case AF_INET6:
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return kernel_rtm_ipv6(cmd, p, ng, metric);
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}
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return 0;
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}
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/*
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* Update or delete a prefix from the kernel,
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* using info from a dataplane context struct.
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