From: Vadim Kochan <vadi...@gmail.com>
Dump RTnetlink address related info with attributes.
Additional changes:
- print 'Len' info at the end of each attribute.
- print new line before each header if packet
contains more netlink messages
Signed-off-by: Vadim Kochan <vadi...@gmail.com>
---
proto_nlmsg.c | 177 +++++++++++++++++++++++++++++++++++++++++++++++++---------
1 file changed, 152 insertions(+), 25 deletions(-)
diff --git a/proto_nlmsg.c b/proto_nlmsg.c
index 89b48b2..e6ede8a 100644
--- a/proto_nlmsg.c
+++ b/proto_nlmsg.c
@@ -10,6 +10,7 @@
#include <libgen.h>
#include <netlink/msg.h>
#include <netlink/route/link.h>
+#include <netlink/route/addr.h>
#include <linux/if_arp.h>
#include <arpa/inet.h>
@@ -17,6 +18,17 @@
#include "proto.h"
#include "protos.h"
+#define INFINITY 0xFFFFFFFFU
+
+#define RTA_LEN(attr) RTA_PAYLOAD(attr)
+#define RTA_INT(attr) (*(int *)RTA_DATA(attr))
+#define RTA_UINT8(attr) (*(uint8_t *)RTA_DATA(attr))
+#define RTA_STR(attr) ((char *)RTA_DATA(attr))
+
+#define attr_fmt(attr, fmt, ...) \
+ tprintf("\tA: "fmt, ##__VA_ARGS__); \
+ tprintf(", Len %u\n", RTA_LEN(attr));
+
static const char *nlmsg_family2str(uint16_t family)
{
switch (family) {
@@ -245,6 +257,25 @@ static char *nlmsg_type2str(uint16_t proto, uint16_t type,
char *buf, int len)
return nl_nlmsgtype2str(type, buf, len);
}
+static const char *addr_family2str(uint16_t family)
+{
+ switch (family) {
+ case AF_INET: return "ipv4";
+ case AF_INET6: return "ipv6";
+ case AF_DECnet: return "decnet";
+ case AF_IPX: return "ipx";
+ default: return "Unknown";
+ }
+}
+
+static const char *addr2str(uint16_t af, const void *addr, char *buf, int blen)
+{
+ if (af == AF_INET || af == AF_INET6)
+ return inet_ntop(af, addr, buf, blen);
+
+ return "???";
+}
+
static void rtnl_print_ifinfo(struct nlmsghdr *hdr)
{
struct ifinfomsg *ifi = NLMSG_DATA(hdr);
@@ -280,40 +311,37 @@ static void rtnl_print_ifinfo(struct nlmsghdr *hdr)
for (; RTA_OK(attr, attrs_len); attr = RTA_NEXT(attr, attrs_len)) {
switch (attr->rta_type) {
case IFLA_ADDRESS:
- tprintf("\tA: Address %s\n",
+ attr_fmt(attr, "Address %s",
ll_addr_n2a(RTA_DATA(attr),
- RTA_PAYLOAD(attr),
- ifi->ifi_type, if_addr,
- sizeof(if_addr)));
+ RTA_LEN(attr), ifi->ifi_type,
+ if_addr, sizeof(if_addr)));
break;
case IFLA_BROADCAST:
- tprintf("\tA: Broadcast %s\n",
+ attr_fmt(attr, "Broadcast %s",
ll_addr_n2a(RTA_DATA(attr),
- RTA_PAYLOAD(attr),
- ifi->ifi_type, if_addr,
- sizeof(if_addr)));
+ RTA_LEN(attr), ifi->ifi_type,
+ if_addr, sizeof(if_addr)));
break;
case IFLA_IFNAME:
- tprintf("\tA: Name %s%s%s\n",
- colorize_start(bold),
- (char *)(RTA_DATA(attr)),
+ attr_fmt(attr, "Name %s%s%s",
+ colorize_start(bold), RTA_STR(attr),
colorize_end());
break;
case IFLA_MTU:
- tprintf("\tA: MTU %d\n", *(int *)(RTA_DATA(attr)));
+ attr_fmt(attr, "MTU %d", RTA_INT(attr));
break;
case IFLA_LINK:
- tprintf("\tA: Link %d\n", *(int *)(RTA_DATA(attr)));
+ attr_fmt(attr, "Link %d", RTA_INT(attr));
break;
case IFLA_QDISC:
- tprintf("\tA: QDisc %s\n", (char *)(RTA_DATA(attr)));
+ attr_fmt(attr, "QDisc %s", RTA_STR(attr));
break;
case IFLA_OPERSTATE:
{
- uint8_t st = *(uint8_t *)(RTA_DATA(attr));
+ uint8_t st = RTA_UINT8(attr);
char states[256];
- tprintf("\tA: Operation state 0x%x (%s%s%s)\n",
+ attr_fmt(attr, "Operation state 0x%x (%s%s%s)",
st,
colorize_start(bold),
rtnl_link_operstate2str(st,
@@ -323,10 +351,10 @@ static void rtnl_print_ifinfo(struct nlmsghdr *hdr)
break;
case IFLA_LINKMODE:
{
- uint8_t mode = *(uint8_t *)(RTA_DATA(attr));
+ uint8_t mode = RTA_UINT8(attr);
char str[32];
- tprintf("\tA: Mode 0x%x (%s%s%s)\n", mode,
+ attr_fmt(attr, "Mode 0x%x (%s%s%s)", mode,
colorize_start(bold),
rtnl_link_mode2str(mode, str,
sizeof(str)),
@@ -334,19 +362,109 @@ static void rtnl_print_ifinfo(struct nlmsghdr *hdr)
}
break;
case IFLA_GROUP:
- tprintf("\tA: Group %d\n", *(int *)(RTA_DATA(attr)));
+ attr_fmt(attr, "Group %d", RTA_INT(attr));
break;
case IFLA_TXQLEN:
- tprintf("\tA: Tx queue len %d\n",
- *(int *)(RTA_DATA(attr)));
+ attr_fmt(attr, "Tx queue len %d", RTA_INT(attr));
break;
case IFLA_NET_NS_PID:
- tprintf("\tA: Network namespace pid %d\n",
- *(int *)(RTA_DATA(attr)));
+ attr_fmt(attr, "Network namespace pid %d",
+ RTA_INT(attr));
break;
case IFLA_NET_NS_FD:
- tprintf("\tA: Network namespace fd %d\n",
- *(int *)(RTA_DATA(attr)));
+ attr_fmt(attr, "Network namespace fd %d",
+ RTA_INT(attr));
+ break;
+ }
+ }
+}
+
+static void rtnl_print_ifaddr(struct nlmsghdr *hdr)
+{
+ struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
+ uint32_t attrs_len = IFA_PAYLOAD(hdr);
+ struct rtattr *attr = IFA_RTA(ifa);
+ struct ifa_cacheinfo *ci;
+ char *scope = "Unknown";
+ char addr_str[256];
+ char flags[256];
+
+ if (ifa->ifa_scope == RT_SCOPE_UNIVERSE)
+ scope = "global";
+ else if (ifa->ifa_scope == RT_SCOPE_LINK)
+ scope = "link";
+ else if (ifa->ifa_scope == RT_SCOPE_HOST)
+ scope = "host";
+ else if (ifa->ifa_scope == RT_SCOPE_NOWHERE)
+ scope = "nowhere";
+
+ tprintf(" [ Address Family %d (%s%s%s)", ifa->ifa_family,
+ colorize_start(bold),
+ addr_family2str(ifa->ifa_family),
+ colorize_end());
+ tprintf(", Prefix Len %d", ifa->ifa_prefixlen);
+ tprintf(", Flags %d (%s%s%s)", ifa->ifa_flags,
+ colorize_start(bold),
+ rtnl_addr_flags2str(ifa->ifa_flags, flags,
+ sizeof(flags)),
+ colorize_end());
+ tprintf(", Scope %d (%s%s%s)", ifa->ifa_scope,
+ colorize_start(bold), scope, colorize_end());
+ tprintf(", Link Index %d ]\n", ifa->ifa_index);
+
+ for (; RTA_OK(attr, attrs_len); attr = RTA_NEXT(attr, attrs_len)) {
+ switch (attr->rta_type) {
+ case IFA_LOCAL:
+ attr_fmt(attr, "Local %s", addr2str(ifa->ifa_family,
+ RTA_DATA(attr), addr_str, sizeof(addr_str)));
+ break;
+ case IFA_ADDRESS:
+ attr_fmt(attr, "Address %s", addr2str(ifa->ifa_family,
+ RTA_DATA(attr), addr_str, sizeof(addr_str)));
+ break;
+ case IFA_BROADCAST:
+ attr_fmt(attr, "Broadcast %s",
+ addr2str(ifa->ifa_family,
+ RTA_DATA(attr), addr_str,
+ sizeof(addr_str)));
+ break;
+ case IFA_MULTICAST:
+ attr_fmt(attr, "Multicast %s",
+ addr2str(ifa->ifa_family,
+ RTA_DATA(attr), addr_str,
+ sizeof(addr_str)));
+ break;
+ case IFA_ANYCAST:
+ attr_fmt(attr, "Anycast %s", addr2str(ifa->ifa_family,
+ RTA_DATA(attr), addr_str, sizeof(addr_str)));
+ break;
+ case IFA_FLAGS:
+ attr_fmt(attr, "Flags %d (%s%s%s)", RTA_INT(attr),
+ colorize_start(bold),
+ rtnl_addr_flags2str(RTA_INT(attr),
+ flags, sizeof(flags)),
+ colorize_end());
+ break;
+ case IFA_LABEL:
+ attr_fmt(attr, "Label %s", RTA_STR(attr));
+ break;
+ case IFA_CACHEINFO:
+ ci = RTA_DATA(attr);
+ tprintf("\tA: Cache (");
+
+ if (ci->ifa_valid == INFINITY)
+ tprintf("valid lft(forever)");
+ else
+ tprintf("valid lft(%us)", ci->ifa_valid);
+
+ if (ci->ifa_prefered == INFINITY)
+ tprintf(", prefrd lft(forever)");
+ else
+ tprintf(", prefrd lft(%us)", ci->ifa_prefered);
+
+ tprintf(", created on(%.2fs)", (double)ci->cstamp /
100);
+ tprintf(", updated on(%.2fs))", (double)ci->cstamp /
100);
+ tprintf(", Len %u\n", RTA_LEN(attr));
break;
}
}
@@ -360,6 +478,12 @@ static void rtnl_msg_print(struct nlmsghdr *hdr)
case RTM_GETLINK:
case RTM_SETLINK:
rtnl_print_ifinfo(hdr);
+ break;
+ case RTM_NEWADDR:
+ case RTM_DELADDR:
+ case RTM_GETADDR:
+ rtnl_print_ifaddr(hdr);
+ break;
}
}
@@ -424,6 +548,9 @@ static void nlmsg(struct pkt_buff *pkt)
break;
hdr = (struct nlmsghdr *) pkt_pull(pkt, sizeof(*hdr));
+ if (hdr && hdr->nlmsg_type != NLMSG_DONE &&
+ (hdr->nlmsg_flags & NLM_F_MULTI))
+ tprintf("\n");
}
}
--
2.3.1
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