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iproute2: use libgenl in ipl2tp 

Use the common code from libgenl.c to parse family, and initialize
structures.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
This commit is contained in:
Julian Anastasov 2012-09-11 12:04:34 +03:00 committed by Stephen Hemminger
parent 8afcc28879
commit 4ef9ff2a8f
1 changed files with 8 additions and 85 deletions
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93
ip/ipl2tp.c
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@ -25,6 +25,7 @@
#include <linux/genetlink.h>
#include <linux/l2tp.h>
#include "libgenl.h"
#include "utils.h"
#include "ip_common.h"
@ -92,20 +93,12 @@ static int genl_family = -1;
static int create_tunnel(struct l2tp_parm *p)
{
struct {
struct nlmsghdr n;
struct genlmsghdr g;
char buf[1024];
} req;
uint32_t local_attr = L2TP_ATTR_IP_SADDR;
uint32_t peer_attr = L2TP_ATTR_IP_DADDR;
memset(&req, 0, sizeof(req));
req.n.nlmsg_type = genl_family;
req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
req.g.cmd = L2TP_CMD_TUNNEL_CREATE;
req.g.version = L2TP_GENL_VERSION;
GENL_REQUEST(req, 0, 1024)
= GENL_INITIALIZER(genl_family, NLM_F_REQUEST | NLM_F_ACK, 0,
L2TP_CMD_TUNNEL_CREATE, L2TP_GENL_VERSION);
addattr32(&req.n, 1024, L2TP_ATTR_CONN_ID, p->tunnel_id);
addattr32(&req.n, 1024, L2TP_ATTR_PEER_CONN_ID, p->peer_tunnel_id);
@ -133,18 +126,9 @@ static int create_tunnel(struct l2tp_parm *p)
static int delete_tunnel(struct l2tp_parm *p)
{
struct {
struct nlmsghdr n;
struct genlmsghdr g;
char buf[128];
} req;
memset(&req, 0, sizeof(req));
req.n.nlmsg_type = genl_family;
req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
req.g.cmd = L2TP_CMD_TUNNEL_DELETE;
req.g.version = L2TP_GENL_VERSION;
GENL_REQUEST(req, 0, 1024)
= GENL_INITIALIZER(genl_family, NLM_F_REQUEST | NLM_F_ACK, 0,
L2TP_CMD_TUNNEL_DELETE, L2TP_GENL_VERSION);
addattr32(&req.n, 128, L2TP_ATTR_CONN_ID, p->tunnel_id);
@ -747,67 +731,6 @@ static int do_show(int argc, char **argv)
return 0;
}
static int genl_parse_getfamily(struct nlmsghdr *nlh)
{
struct rtattr *tb[CTRL_ATTR_MAX + 1];
struct genlmsghdr *ghdr = NLMSG_DATA(nlh);
int len = nlh->nlmsg_len;
struct rtattr *attrs;
if (nlh->nlmsg_type != GENL_ID_CTRL) {
fprintf(stderr, "Not a controller message, nlmsg_len=%d "
"nlmsg_type=0x%x\n", nlh->nlmsg_len, nlh->nlmsg_type);
return -1;
}
if (ghdr->cmd != CTRL_CMD_NEWFAMILY) {
fprintf(stderr, "Unknown controller command %d\n", ghdr->cmd);
return -1;
}
len -= NLMSG_LENGTH(GENL_HDRLEN);
if (len < 0) {
fprintf(stderr, "wrong controller message len %d\n", len);
return -1;
}
attrs = (struct rtattr *) ((char *) ghdr + GENL_HDRLEN);
parse_rtattr(tb, CTRL_ATTR_MAX, attrs, len);
if (tb[CTRL_ATTR_FAMILY_ID] == NULL) {
fprintf(stderr, "Missing family id TLV\n");
return -1;
}
return rta_getattr_u16(tb[CTRL_ATTR_FAMILY_ID]);
}
int genl_ctrl_resolve_family(const char *family)
{
struct {
struct nlmsghdr n;
struct genlmsghdr g;
char buf[1024];
} req;
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = GENL_ID_CTRL;
req.g.cmd = CTRL_CMD_GETFAMILY;
addattr_l(&req.n, 1024, CTRL_ATTR_FAMILY_NAME,
family, strlen(family) + 1);
if (rtnl_talk(&genl_rth, &req.n, 0, 0, &req.n) < 0) {
fprintf(stderr, "Error talking to the kernel\n");
return -2;
}
return genl_parse_getfamily(&req.n);
}
int do_ipl2tp(int argc, char **argv)
{
if (genl_family < 0) {
@ -816,7 +739,7 @@ int do_ipl2tp(int argc, char **argv)
exit(1);
}
genl_family = genl_ctrl_resolve_family(L2TP_GENL_NAME);
genl_family = genl_resolve_family(&genl_rth, L2TP_GENL_NAME);
if (genl_family < 0)
exit(1);
}