[Devel] [PATCH 1/2] Introduce iplink_parse() routine
Pavel Emelyanov
xemul at openvz.org
Thu Jul 19 02:32:31 PDT 2007
This routine parses CLI attributes, describing generic link
parameters such as name, address, etc.
This is mostly copy-pasted from iplink_modify().
Signed-off-by: Pavel Emelyanov <xemul at openvz.org>
Acked-by: Patrick McHardy <kaber at trash.net>
---
include/utils.h | 3 +
ip/iplink.c | 127 ++++++++++++++++++++++++++++++++------------------------
2 files changed, 76 insertions(+), 54 deletions(-)
diff --git a/include/utils.h b/include/utils.h
index a3fd335..3fd851d 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -146,4 +146,7 @@ extern int cmdlineno;
extern size_t getcmdline(char **line, size_t *len, FILE *in);
extern int makeargs(char *line, char *argv[], int maxargs);
+struct iplink_req;
+int iplink_parse(int argc, char **argv, struct iplink_req *req,
+ char **name, char **type, char **link, char **dev);
#endif /* __UTILS_H__ */
diff --git a/ip/iplink.c b/ip/iplink.c
index cfacdab..e0e0d85 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c
@@ -142,140 +142,159 @@ static int iplink_have_newlink(void)
}
#endif /* ! IPLINK_IOCTL_COMPAT */
-static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
+struct iplink_req {
+ struct nlmsghdr n;
+ struct ifinfomsg i;
+ char buf[1024];
+};
+
+int iplink_parse(int argc, char **argv, struct iplink_req *req,
+ char **name, char **type, char **link, char **dev)
{
+ int ret, len;
+ char abuf[32];
int qlen = -1;
int mtu = -1;
- int len;
- char abuf[32];
- char *dev = NULL;
- char *name = NULL;
- char *link = NULL;
- char *type = NULL;
- struct link_util *lu = NULL;
- struct {
- struct nlmsghdr n;
- struct ifinfomsg i;
- char buf[1024];
- } req;
- memset(&req, 0, sizeof(req));
-
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.n.nlmsg_flags = NLM_F_REQUEST|flags;
- req.n.nlmsg_type = cmd;
- req.i.ifi_family = preferred_family;
+ ret = argc;
while (argc > 0) {
if (strcmp(*argv, "up") == 0) {
- req.i.ifi_change |= IFF_UP;
- req.i.ifi_flags |= IFF_UP;
+ req->i.ifi_change |= IFF_UP;
+ req->i.ifi_flags |= IFF_UP;
} else if (strcmp(*argv, "down") == 0) {
- req.i.ifi_change |= IFF_UP;
- req.i.ifi_flags &= ~IFF_UP;
+ req->i.ifi_change |= IFF_UP;
+ req->i.ifi_flags &= ~IFF_UP;
} else if (strcmp(*argv, "name") == 0) {
NEXT_ARG();
- name = *argv;
+ *name = *argv;
} else if (matches(*argv, "link") == 0) {
NEXT_ARG();
- link = *argv;
+ *link = *argv;
} else if (matches(*argv, "address") == 0) {
NEXT_ARG();
len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
- addattr_l(&req.n, sizeof(req), IFLA_ADDRESS, abuf, len);
+ addattr_l(&req->n, sizeof(*req), IFLA_ADDRESS, abuf, len);
} else if (matches(*argv, "broadcast") == 0 ||
- strcmp(*argv, "brd") == 0) {
+ strcmp(*argv, "brd") == 0) {
NEXT_ARG();
len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
- addattr_l(&req.n, sizeof(req), IFLA_BROADCAST, abuf, len);
+ addattr_l(&req->n, sizeof(*req), IFLA_BROADCAST, abuf, len);
} else if (matches(*argv, "txqueuelen") == 0 ||
- strcmp(*argv, "qlen") == 0 ||
- matches(*argv, "txqlen") == 0) {
+ strcmp(*argv, "qlen") == 0 ||
+ matches(*argv, "txqlen") == 0) {
NEXT_ARG();
if (qlen != -1)
duparg("txqueuelen", *argv);
if (get_integer(&qlen, *argv, 0))
invarg("Invalid \"txqueuelen\" value\n", *argv);
- addattr_l(&req.n, sizeof(req), IFLA_TXQLEN, &qlen, 4);
+ addattr_l(&req->n, sizeof(*req), IFLA_TXQLEN, &qlen, 4);
} else if (strcmp(*argv, "mtu") == 0) {
NEXT_ARG();
if (mtu != -1)
duparg("mtu", *argv);
if (get_integer(&mtu, *argv, 0))
invarg("Invalid \"mtu\" value\n", *argv);
- addattr_l(&req.n, sizeof(req), IFLA_MTU, &mtu, 4);
+ addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4);
} else if (strcmp(*argv, "multicast") == 0) {
NEXT_ARG();
- req.i.ifi_change |= IFF_MULTICAST;
+ req->i.ifi_change |= IFF_MULTICAST;
if (strcmp(*argv, "on") == 0) {
- req.i.ifi_flags |= IFF_MULTICAST;
+ req->i.ifi_flags |= IFF_MULTICAST;
} else if (strcmp(*argv, "off") == 0) {
- req.i.ifi_flags &= ~IFF_MULTICAST;
+ req->i.ifi_flags &= ~IFF_MULTICAST;
} else
return on_off("multicast");
} else if (strcmp(*argv, "allmulticast") == 0) {
NEXT_ARG();
- req.i.ifi_change |= IFF_ALLMULTI;
+ req->i.ifi_change |= IFF_ALLMULTI;
if (strcmp(*argv, "on") == 0) {
- req.i.ifi_flags |= IFF_ALLMULTI;
+ req->i.ifi_flags |= IFF_ALLMULTI;
} else if (strcmp(*argv, "off") == 0) {
- req.i.ifi_flags &= ~IFF_ALLMULTI;
+ req->i.ifi_flags &= ~IFF_ALLMULTI;
} else
return on_off("allmulticast");
} else if (strcmp(*argv, "promisc") == 0) {
NEXT_ARG();
- req.i.ifi_change |= IFF_PROMISC;
+ req->i.ifi_change |= IFF_PROMISC;
if (strcmp(*argv, "on") == 0) {
- req.i.ifi_flags |= IFF_PROMISC;
+ req->i.ifi_flags |= IFF_PROMISC;
} else if (strcmp(*argv, "off") == 0) {
- req.i.ifi_flags &= ~IFF_PROMISC;
+ req->i.ifi_flags &= ~IFF_PROMISC;
} else
return on_off("promisc");
} else if (strcmp(*argv, "trailers") == 0) {
NEXT_ARG();
- req.i.ifi_change |= IFF_NOTRAILERS;
+ req->i.ifi_change |= IFF_NOTRAILERS;
if (strcmp(*argv, "off") == 0) {
- req.i.ifi_flags |= IFF_NOTRAILERS;
+ req->i.ifi_flags |= IFF_NOTRAILERS;
} else if (strcmp(*argv, "on") == 0) {
- req.i.ifi_flags &= ~IFF_NOTRAILERS;
+ req->i.ifi_flags &= ~IFF_NOTRAILERS;
} else
return on_off("trailers");
} else if (strcmp(*argv, "arp") == 0) {
NEXT_ARG();
- req.i.ifi_change |= IFF_NOARP;
+ req->i.ifi_change |= IFF_NOARP;
if (strcmp(*argv, "on") == 0) {
- req.i.ifi_flags &= ~IFF_NOARP;
+ req->i.ifi_flags &= ~IFF_NOARP;
} else if (strcmp(*argv, "off") == 0) {
- req.i.ifi_flags |= IFF_NOARP;
+ req->i.ifi_flags |= IFF_NOARP;
} else
return on_off("noarp");
#ifdef IFF_DYNAMIC
} else if (matches(*argv, "dynamic") == 0) {
NEXT_ARG();
- req.i.ifi_change |= IFF_DYNAMIC;
+ req->i.ifi_change |= IFF_DYNAMIC;
if (strcmp(*argv, "on") == 0) {
- req.i.ifi_flags |= IFF_DYNAMIC;
+ req->i.ifi_flags |= IFF_DYNAMIC;
} else if (strcmp(*argv, "off") == 0) {
- req.i.ifi_flags &= ~IFF_DYNAMIC;
+ req->i.ifi_flags &= ~IFF_DYNAMIC;
} else
return on_off("dynamic");
#endif
} else if (matches(*argv, "type") == 0) {
NEXT_ARG();
- type = *argv;
+ *type = *argv;
argc--; argv++;
break;
} else {
- if (strcmp(*argv, "dev") == 0) {
+ if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
}
- if (dev)
+ if (*dev)
duparg2("dev", *argv);
- dev = *argv;
+ *dev = *argv;
}
argc--; argv++;
}
+ return ret - argc;
+}
+
+static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
+{
+ int len;
+ char *dev = NULL;
+ char *name = NULL;
+ char *link = NULL;
+ char *type = NULL;
+ struct link_util *lu = NULL;
+ struct iplink_req req;
+ int ret;
+
+ memset(&req, 0, sizeof(req));
+
+ req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.n.nlmsg_flags = NLM_F_REQUEST|flags;
+ req.n.nlmsg_type = cmd;
+ req.i.ifi_family = preferred_family;
+
+ ret = iplink_parse(argc, argv, &req, &name, &type, &link, &dev);
+ if (ret < 0)
+ return ret;
+
+ argc -= ret;
+ argv += ret;
ll_init_map(&rth);
if (type) {
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