[systemd-devel] [PATCH] networkd: dont configure route if lease doesn't have one
Umut Tezduyar Lindskog
umut.tezduyar at axis.com
Tue Apr 29 13:40:38 PDT 2014
---
src/libsystemd-network/sd-dhcp-lease.c | 34 ++++---
src/network/networkd-link.c | 160 ++++++++++++++++++--------------
2 files changed, 110 insertions(+), 84 deletions(-)
diff --git a/src/libsystemd-network/sd-dhcp-lease.c b/src/libsystemd-network/sd-dhcp-lease.c
index aa479ff..cb708c6 100644
--- a/src/libsystemd-network/sd-dhcp-lease.c
+++ b/src/libsystemd-network/sd-dhcp-lease.c
@@ -112,7 +112,10 @@ int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, struct in_addr *addr) {
assert_return(lease, -EINVAL);
assert_return(addr, -EINVAL);
- addr->s_addr = lease->router;
+ if (lease->router != INADDR_ANY)
+ addr->s_addr = lease->router;
+ else
+ return -ENOENT;
return 0;
}
@@ -277,6 +280,7 @@ int dhcp_lease_new(sd_dhcp_lease **ret) {
if (!lease)
return -ENOMEM;
+ lease->router = INADDR_ANY;
lease->n_ref = REFCNT_INIT;
*ret = lease;
@@ -316,17 +320,19 @@ int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) {
"ADDRESS=%s\n", string);
r = sd_dhcp_lease_get_router(lease, &address);
- if (r < 0)
+ if (r < 0 && r != -ENOENT)
goto finish;
- string = inet_ntop(AF_INET, &address, buf, INET_ADDRSTRLEN);
- if (!string) {
- r = -errno;
- goto finish;
- }
+ if (r >= 0) {
+ string = inet_ntop(AF_INET, &address, buf, INET_ADDRSTRLEN);
+ if (!string) {
+ r = -errno;
+ goto finish;
+ }
- fprintf(f,
- "ROUTER=%s\n", string);
+ fprintf(f,
+ "ROUTER=%s\n", string);
+ }
r = sd_dhcp_lease_get_netmask(lease, &address);
if (r < 0)
@@ -440,11 +446,13 @@ int dhcp_lease_load(const char *lease_file, sd_dhcp_lease **ret) {
lease->address = addr.s_addr;
- r = inet_pton(AF_INET, router, &addr);
- if (r < 0)
- return r;
+ if (router) {
+ r = inet_pton(AF_INET, router, &addr);
+ if (r < 0)
+ return r;
- lease->router = addr.s_addr;
+ lease->router = addr.s_addr;
+ }
r = inet_pton(AF_INET, netmask, &addr);
if (r < 0)
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 015a82d..8af376d 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -301,55 +301,60 @@ static int link_enter_set_routes(Link *link) {
struct in_addr gateway;
r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
- if (r < 0) {
- log_warning_link(link, "DHCP error: no router: %s",
- strerror(-r));
+ if (r < 0 && r != -ENOENT) {
+ log_warning_link(link, "DHCP error: %s", strerror(-r));
return r;
}
- r = route_new_dynamic(&route);
- if (r < 0) {
- log_error_link(link, "Could not allocate route: %s",
- strerror(-r));
- return r;
- }
+ if (r >= 0) {
+ r = route_new_dynamic(&route);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
+ }
- r = route_new_dynamic(&route_gw);
- if (r < 0) {
- log_error_link(link, "Could not allocate route: %s",
- strerror(-r));
- return r;
- }
+ r = route_new_dynamic(&route_gw);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
+ }
- /* The dhcp netmask may mask out the gateway. Add an explicit
- * route for the gw host so that we can route no matter the
- * netmask or existing kernel route tables. */
- route_gw->family = AF_INET;
- route_gw->dst_addr.in = gateway;
- route_gw->dst_prefixlen = 32;
- route_gw->scope = RT_SCOPE_LINK;
+ /* The dhcp netmask may mask out the gateway. Add an explicit
+ * route for the gw host so that we can route no matter the
+ * netmask or existing kernel route tables. */
+ route_gw->family = AF_INET;
+ route_gw->dst_addr.in = gateway;
+ route_gw->dst_prefixlen = 32;
+ route_gw->scope = RT_SCOPE_LINK;
- r = route_configure(route_gw, link, &route_handler);
- if (r < 0) {
- log_warning_link(link,
- "could not set host route: %s", strerror(-r));
- return r;
- }
+ r = route_configure(route_gw, link, &route_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set host route: %s", strerror(-r));
+ return r;
+ }
- link->route_messages ++;
+ link->route_messages ++;
- route->family = AF_INET;
- route->in_addr.in = gateway;
+ route->family = AF_INET;
+ route->in_addr.in = gateway;
- r = route_configure(route, link, &route_handler);
- if (r < 0) {
- log_warning_link(link,
- "could not set routes: %s", strerror(-r));
- link_enter_failed(link);
- return r;
+ r = route_configure(route, link, &route_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set routes: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->route_messages ++;
}
+ }
- link->route_messages ++;
+ if (link->route_messages == 0) {
+ link_enter_configured(link);
}
return 0;
@@ -680,29 +685,31 @@ static int dhcp_lease_lost(Link *link) {
r = address_new_dynamic(&address);
if (r >= 0) {
- sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
- sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
- sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
- prefixlen = net_netmask_to_prefixlen(&netmask);
-
- r = route_new_dynamic(&route_gw);
+ r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
if (r >= 0) {
- route_gw->family = AF_INET;
- route_gw->dst_addr.in = gateway;
- route_gw->dst_prefixlen = 32;
- route_gw->scope = RT_SCOPE_LINK;
+ r = route_new_dynamic(&route_gw);
+ if (r >= 0) {
+ route_gw->family = AF_INET;
+ route_gw->dst_addr.in = gateway;
+ route_gw->dst_prefixlen = 32;
+ route_gw->scope = RT_SCOPE_LINK;
- route_drop(route_gw, link, &route_drop_handler);
- }
+ route_drop(route_gw, link, &route_drop_handler);
+ }
- r = route_new_dynamic(&route);
- if (r >= 0) {
- route->family = AF_INET;
- route->in_addr.in = gateway;
+ r = route_new_dynamic(&route);
+ if (r >= 0) {
+ route->family = AF_INET;
+ route->in_addr.in = gateway;
- route_drop(route, link, &route_drop_handler);
+ route_drop(route, link, &route_drop_handler);
+ }
}
+ sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
+ sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
+ prefixlen = net_netmask_to_prefixlen(&netmask);
+
address->family = AF_INET;
address->in_addr.in = addr;
address->prefixlen = prefixlen;
@@ -777,25 +784,36 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
prefixlen = net_netmask_to_prefixlen(&netmask);
r = sd_dhcp_lease_get_router(lease, &gateway);
- if (r < 0) {
- log_warning_link(link, "DHCP error: no router: %s",
- strerror(-r));
+ if (r < 0 && r != -ENOENT) {
+ log_warning_link(link, "DHCP error: %s", strerror(-r));
return r;
}
- log_struct_link(LOG_INFO, link,
- "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
- link->ifname,
- ADDRESS_FMT_VAL(address),
- prefixlen,
- ADDRESS_FMT_VAL(gateway),
- "ADDRESS=%u.%u.%u.%u",
- ADDRESS_FMT_VAL(address),
- "PREFIXLEN=%u",
- prefixlen,
- "GATEWAY=%u.%u.%u.%u",
- ADDRESS_FMT_VAL(gateway),
- NULL);
+ if (r >= 0)
+ log_struct_link(LOG_INFO, link,
+ "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
+ link->ifname,
+ ADDRESS_FMT_VAL(address),
+ prefixlen,
+ ADDRESS_FMT_VAL(gateway),
+ "ADDRESS=%u.%u.%u.%u",
+ ADDRESS_FMT_VAL(address),
+ "PREFIXLEN=%u",
+ prefixlen,
+ "GATEWAY=%u.%u.%u.%u",
+ ADDRESS_FMT_VAL(gateway),
+ NULL);
+ else
+ log_struct_link(LOG_INFO, link,
+ "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u",
+ link->ifname,
+ ADDRESS_FMT_VAL(address),
+ prefixlen,
+ "ADDRESS=%u.%u.%u.%u",
+ ADDRESS_FMT_VAL(address),
+ "PREFIXLEN=%u",
+ prefixlen,
+ NULL);
link->dhcp_lease = lease;
--
1.7.10.4
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