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confd: ietf-interfaces: Add IPv4/6 autoconf support

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This commit is contained in:
Tobias Waldekranz
2023-05-12 14:24:41 +02:00
committed by Joachim Wiberg
parent 82d11112a6
commit c2042bb036
1 changed files with 104 additions and 23 deletions
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src/confd/src/ietf-interfaces.c
+104 -23
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@@ -209,11 +209,83 @@ static sr_error_t netdag_gen_ipv6(FILE *ip, const char *ifname,
return netdag_gen_ipvx_addrs(ip, ifname, lyd_child(ipv6));
}
static sr_error_t netdag_gen_iface(struct dagger *net, struct lyd_node *iface)
static sr_error_t netdag_gen_ipv6_autoconf(FILE *ip, struct lyd_node *dif)
{
const char *ifname = lydx_get_cattr(iface, "name");
enum lydx_op op = lydx_get_op(iface);
sr_error_t err = SR_ERR_INTERNAL;
struct lyd_node *node;
struct lydx_diff nd;
node = lydx_get_descendant(lyd_child(dif),
"ipv6",
"autoconf",
"create-global-addresses",
NULL);
if (!node)
return 0;
lydx_get_diff(node, &nd);
if ((!nd.new || nd.is_default) &&
(!nd.old || nd.was_default))
return 0;
if (!nd.new || !strcmp(nd.val, "true"))
fputs(" addrgenmode eui64", ip);
else
fputs(" addrgenmode none", ip);
return 0;
}
static sr_error_t netdag_gen_ipv4_autoconf(struct dagger *net,
struct lyd_node *dif)
{
const char *ifname = lydx_get_cattr(dif, "name");
struct lyd_node *node;
struct lydx_diff nd;
FILE *initctl;
node = lydx_get_descendant(lyd_child(dif),
"ipv4",
"autoconf",
"enabled",
NULL);
if (!node)
return 0;
lydx_get_diff(node, &nd);
if ((!nd.new || nd.is_default) &&
(!nd.old || nd.was_default))
return 0;
if (!strcmp(nd.val, "true")) {
initctl = dagger_fopen_next(net, "init", ifname,
60, "zeroconf-up.sh");
if (!initctl)
return SR_ERR_INTERNAL;
fprintf(initctl,
"initctl -bnq enable zeroconf@%s.conf\n", ifname);
} else {
initctl = dagger_fopen_current(net, "exit", ifname,
40, "zeroconf-down.sh");
if (!initctl)
return SR_ERR_INTERNAL;
fprintf(initctl,
"initctl -bnq disable zeroconf@%s.conf\n", ifname);
}
fclose(initctl);
return 0;
}
static sr_error_t netdag_gen_iface(struct dagger *net,
struct lyd_node *dif, struct lyd_node *cif)
{
const char *ifname = lydx_get_cattr(dif, "name");
enum lydx_op op = lydx_get_op(dif);
sr_error_t err = SR_ERR_OK;
struct lyd_node *node;
const char *attr;
bool fixed;
@@ -225,9 +297,11 @@ static sr_error_t netdag_gen_iface(struct dagger *net, struct lyd_node *iface)
(op == LYDX_OP_NONE) ? "mod" : ((op == LYDX_OP_CREATE) ? "add" : "del"));
if (op == LYDX_OP_DELETE) {
ip = dagger_fopen_current(net, "exit", ifname, 50, "delete.ip");
if (!ip)
ip = dagger_fopen_current(net, "exit", ifname, 50, "exit.ip");
if (!ip) {
err = SR_ERR_INTERNAL;
goto err;
}
if (fixed) {
fprintf(ip, "link set dev %s down\n", ifname);
@@ -245,20 +319,15 @@ static sr_error_t netdag_gen_iface(struct dagger *net, struct lyd_node *iface)
goto err;
attr = ((op == LYDX_OP_CREATE) && !fixed) ? "add" : "set";
fprintf(ip, "link %s dev %s", attr, ifname);
fprintf(ip, "link %s dev %s down", attr, ifname);
/* Generic attributes */
err = netdag_gen_ipv4_autoconf(net, dif);
if (err)
goto err_close_ip;
attr = lydx_get_cattr(iface, "enabled");
if (!attr && (op == LYDX_OP_CREATE))
/* When adding an interface to the configuration, we
* need to bring it up, even when "enabled" is not
* explicitly set.
*/
attr = "true";
attr = attr ? (!strcmp(attr, "true") ? " up" : " down") : "";
fprintf(ip, "%s", attr);
err = netdag_gen_ipv6_autoconf(ip, dif);
if (err)
goto err_close_ip;
/* Type specific attributes */
@@ -266,23 +335,30 @@ static sr_error_t netdag_gen_iface(struct dagger *net, struct lyd_node *iface)
/* IP Addresses */
node = lydx_get_child(iface, "ipv4");
node = lydx_get_child(dif, "ipv4");
if (node) {
err = netdag_gen_ipv4(ip, ifname, node);
if (err)
goto err_close_ip;
}
node = lydx_get_child(iface, "ipv6");
node = lydx_get_child(dif, "ipv6");
if (node) {
err = netdag_gen_ipv6(ip, ifname, node);
if (err)
goto err_close_ip;
}
attr = lydx_get_cattr(cif, "enabled");
if (!attr || !strcmp(attr, "true"))
fprintf(ip, "link set dev %s up\n", ifname);
err_close_ip:
fclose(ip);
err:
if (err)
fprintf(stderr, "FAIL %s: %d\n", ifname, err);
return err;
}
@@ -305,7 +381,7 @@ static sr_error_t netdag_init(struct dagger *net, struct lyd_node *cifs,
static int ifchange(sr_session_ctx_t *session, uint32_t sub_id, const char *module,
const char *xpath, sr_event_t event, unsigned request_id, void *_confd)
{
struct lyd_node *diff, *cifs, *difs, *iface;
struct lyd_node *diff, *cifs, *difs, *cif, *dif;
struct confd *confd = _confd;
sr_data_t *cfg;
sr_error_t err;
@@ -340,8 +416,13 @@ static int ifchange(sr_session_ctx_t *session, uint32_t sub_id, const char *modu
if (err)
goto err_free_diff;
LYX_LIST_FOR_EACH(difs, iface, "interface") {
err = netdag_gen_iface(&confd->netdag, iface);
LYX_LIST_FOR_EACH(difs, dif, "interface") {
LYX_LIST_FOR_EACH(cifs, cif, "interface")
if (!strcmp(lydx_get_cattr(dif, "name"),
lydx_get_cattr(cif, "name")))
break;
err = netdag_gen_iface(&confd->netdag, dif, cif);
if (err)
break;
}