[PATCH v7 09/13] net/pcap: add link state and speed for interface mode

Stephen Hemminger
2026-01-26T18:09:11Z

When the PCAP PMD is used in pass-through mode with a physical
interface (iface=X), the link status was always reported with
hardcoded values regardless of the actual interface state.

Add OS-dependent functions to query the real link state, speed,
duplex, and autonegotiation settings from the underlying interface.
The eth_link_update() callback now returns accurate information
when operating in pass-through mode.

Linux uses ETHTOOL_GLINKSETTINGS which supports all speeds up to
800 Gbps. FreeBSD uses SIOCGIFMEDIA, and Windows uses
GetAdaptersAddresses().

For pcap file mode or separate rx/tx interface configurations,
default values continue to be used since there is no single
underlying interface to query.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
drivers/net/pcap/pcap_ethdev.c | 105 +++++++++-
drivers/net/pcap/pcap_osdep.h | 22 ++
drivers/net/pcap/pcap_osdep_freebsd.c | 276 ++++++++++++++++++++++++++
drivers/net/pcap/pcap_osdep_linux.c | 112 +++++++++++
drivers/net/pcap/pcap_osdep_windows.c | 95 +++++++--
5 files changed, 587 insertions(+), 23 deletions(-)

diff --git a/drivers/net/pcap/pcap_ethdev.c b/drivers/net/pcap/pcap_ethdev.c
index 810f9c6f82..0200e129d8 100644
--- a/drivers/net/pcap/pcap_ethdev.c
+++ b/drivers/net/pcap/pcap_ethdev.c
@@ -147,13 +147,6 @@ static const char *valid_arguments[] = {
NULL
};

-static struct rte_eth_link pmd_link = {
- .link_speed = RTE_ETH_SPEED_NUM_10G,
- .link_duplex = RTE_ETH_LINK_FULL_DUPLEX,
- .link_status = RTE_ETH_LINK_DOWN,
- .link_autoneg = RTE_ETH_LINK_FIXED,
-};
-
RTE_LOG_REGISTER_DEFAULT(eth_pcap_logtype, NOTICE);

static struct queue_missed_stat*
@@ -900,11 +893,96 @@ eth_dev_close(struct rte_eth_dev *dev)
return 0;
}

+/*
+ * Convert osdep speed (Mbps) to rte_eth_link speed constant.
+ */
+static uint32_t
+speed_mbps_to_rte(uint32_t speed_mbps)
+{
+ switch (speed_mbps) {
+ case 10:
+ return RTE_ETH_SPEED_NUM_10M;
+ case 100:
+ return RTE_ETH_SPEED_NUM_100M;
+ case 1000:
+ return RTE_ETH_SPEED_NUM_1G;
+ case 2500:
+ return RTE_ETH_SPEED_NUM_2_5G;
+ case 5000:
+ return RTE_ETH_SPEED_NUM_5G;
+ case 10000:
+ return RTE_ETH_SPEED_NUM_10G;
+ case 20000:
+ return RTE_ETH_SPEED_NUM_20G;
+ case 25000:
+ return RTE_ETH_SPEED_NUM_25G;
+ case 40000:
+ return RTE_ETH_SPEED_NUM_40G;
+ case 50000:
+ return RTE_ETH_SPEED_NUM_50G;
+ case 56000:
+ return RTE_ETH_SPEED_NUM_56G;
+ case 100000:
+ return RTE_ETH_SPEED_NUM_100G;
+ case 200000:
+ return RTE_ETH_SPEED_NUM_200G;
+ case 400000:
+ return RTE_ETH_SPEED_NUM_400G;
+ case 800000:
+ return RTE_ETH_SPEED_NUM_800G;
+ default:
+ /* For unknown speeds, return the raw value */
+ if (speed_mbps > 0)
+ return speed_mbps;
+ return RTE_ETH_SPEED_NUM_UNKNOWN;
+ }
+}
+
static int
-eth_link_update(struct rte_eth_dev *dev __rte_unused,
- int wait_to_complete __rte_unused)
+eth_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
{
- return 0;
+ struct pmd_internals *internals = dev->data->dev_private;
+ struct rte_eth_link link;
+ struct osdep_iface_link osdep_link;
+ const char *iface_name;
+
+ memset(&link, 0, sizeof(link));
+
+ /*
+ * For pass-through mode (single_iface), query the actual interface.
+ * Otherwise, use the default static link values.
+ */
+ if (internals->single_iface) {
+ iface_name = internals->rx_queue[0].name;
+
+ if (osdep_iface_link_get(iface_name, &osdep_link) == 0) {
+ link.link_speed = speed_mbps_to_rte(osdep_link.link_speed);
+ link.link_status = osdep_link.link_status ?
+ RTE_ETH_LINK_UP : RTE_ETH_LINK_DOWN;
+ link.link_duplex = osdep_link.link_duplex ?
+ RTE_ETH_LINK_FULL_DUPLEX : RTE_ETH_LINK_HALF_DUPLEX;
+ link.link_autoneg = osdep_link.link_autoneg ?
+ RTE_ETH_LINK_AUTONEG : RTE_ETH_LINK_FIXED;
+ } else {
+ /* Query failed, use defaults */
+ link.link_speed = RTE_ETH_SPEED_NUM_10G;
+ link.link_duplex = RTE_ETH_LINK_FULL_DUPLEX;
+ link.link_status = RTE_ETH_LINK_DOWN;
+ link.link_autoneg = RTE_ETH_LINK_FIXED;
+ }
+ } else {
+ /*
+ * Not in pass-through mode (using pcap files or separate
+ * interfaces for rx/tx). Use default values.
+ */
+ link.link_speed = RTE_ETH_SPEED_NUM_10G;
+ link.link_duplex = RTE_ETH_LINK_FULL_DUPLEX;
+ link.link_status = dev->data->dev_started ?
+ RTE_ETH_LINK_UP : RTE_ETH_LINK_DOWN;
+ link.link_autoneg = RTE_ETH_LINK_FIXED;
+ }
+
+ return rte_eth_linkstatus_set(dev, &link);
}

static int
@@ -1269,7 +1347,12 @@ pmd_init_internals(struct rte_vdev_device *vdev,
data = (*eth_dev)->data;
data->nb_rx_queues = (uint16_t)nb_rx_queues;
data->nb_tx_queues = (uint16_t)nb_tx_queues;
- data->dev_link = pmd_link;
+ data->dev_link = (struct rte_eth_link) {
+ .link_speed = RTE_ETH_SPEED_NUM_NONE,
+ .link_duplex = RTE_ETH_LINK_FULL_DUPLEX,
+ .link_status = RTE_ETH_LINK_DOWN,
+ .link_autoneg = RTE_ETH_LINK_FIXED,
+ };
data->mac_addrs = &(*internals)->eth_addr;
data->promiscuous = 1;
data->all_multicast = 1;
diff --git a/drivers/net/pcap/pcap_osdep.h b/drivers/net/pcap/pcap_osdep.h
index a0e2b5ace9..732813c028 100644
--- a/drivers/net/pcap/pcap_osdep.h
+++ b/drivers/net/pcap/pcap_osdep.h
@@ -13,7 +13,29 @@
extern int eth_pcap_logtype;
#define RTE_LOGTYPE_ETH_PCAP eth_pcap_logtype

+/**
+ * Link information returned by osdep_iface_link_get().
+ */
+struct osdep_iface_link {
+ uint32_t link_speed; /**< Speed in Mbps, 0 if unknown */
+ uint8_t link_status; /**< 1 = up, 0 = down */
+ uint8_t link_duplex; /**< 1 = full, 0 = half */
+ uint8_t link_autoneg; /**< 1 = autoneg enabled, 0 = fixed */
+};
+
int osdep_iface_index_get(const char *name);
int osdep_iface_mac_get(const char *name, struct rte_ether_addr *mac);

+/**
+ * Get link state and speed for a network interface.
+ *
+ * @param name
+ * Interface name (e.g., "eth0" on Linux, "{GUID}" on Windows).
+ * @param link
+ * Pointer to structure to fill with link information.
+ * @return
+ * 0 on success, -1 on failure.
+ */
+int osdep_iface_link_get(const char *name, struct osdep_iface_link *link);
+
#endif
diff --git a/drivers/net/pcap/pcap_osdep_freebsd.c b/drivers/net/pcap/pcap_osdep_freebsd.c
index 0185665f0b..404f3c7432 100644
--- a/drivers/net/pcap/pcap_osdep_freebsd.c
+++ b/drivers/net/pcap/pcap_osdep_freebsd.c
@@ -5,8 +5,12 @@
*/

#include <string.h>
+#include <stdlib.h>
#include <net/if.h>
#include <net/if_dl.h>
+#include <net/if_media.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
#include <sys/sysctl.h>

#include "pcap_osdep.h"
@@ -55,3 +59,275 @@ osdep_iface_mac_get(const char *if_name, struct rte_ether_addr *mac)
free(buf);
return 0;
}
+
+/*
+ * Map media subtype to speed in Mbps.
+ * This handles common Ethernet media types.
+ */
+static uint32_t
+media_subtype_to_speed(int subtype)
+{
+ switch (subtype) {
+ case IFM_10_T:
+ case IFM_10_2:
+ case IFM_10_5:
+ case IFM_10_STP:
+ case IFM_10_FL:
+ return 10;
+ case IFM_100_TX:
+ case IFM_100_FX:
+ case IFM_100_T4:
+ case IFM_100_VG:
+ case IFM_100_T2:
+ return 100;
+ case IFM_1000_SX:
+ case IFM_1000_LX:
+ case IFM_1000_CX:
+ case IFM_1000_T:
+#ifdef IFM_1000_KX
+ case IFM_1000_KX:
+#endif
+#ifdef IFM_1000_SGMII
+ case IFM_1000_SGMII:
+#endif
+ return 1000;
+#ifdef IFM_2500_T
+ case IFM_2500_T:
+#endif
+#ifdef IFM_2500_X
+ case IFM_2500_X:
+#endif
+#ifdef IFM_2500_KX
+ case IFM_2500_KX:
+#endif
+ return 2500;
+#ifdef IFM_5000_T
+ case IFM_5000_T:
+#endif
+#ifdef IFM_5000_KR
+ case IFM_5000_KR:
+#endif
+ return 5000;
+ case IFM_10G_LR:
+ case IFM_10G_SR:
+ case IFM_10G_CX4:
+ case IFM_10G_T:
+ case IFM_10G_TWINAX:
+ case IFM_10G_TWINAX_LONG:
+ case IFM_10G_LRM:
+ case IFM_10G_KX4:
+ case IFM_10G_KR:
+ case IFM_10G_CR1:
+ case IFM_10G_ER:
+ case IFM_10G_SFI:
+ return 10000;
+#ifdef IFM_20G_KR2
+ case IFM_20G_KR2:
+#endif
+ return 20000;
+ case IFM_25G_CR:
+ case IFM_25G_KR:
+ case IFM_25G_SR:
+ case IFM_25G_LR:
+#ifdef IFM_25G_ACC
+ case IFM_25G_ACC:
+#endif
+#ifdef IFM_25G_AOC
+ case IFM_25G_AOC:
+#endif
+#ifdef IFM_25G_ER
+ case IFM_25G_ER:
+#endif
+#ifdef IFM_25G_T
+ case IFM_25G_T:
+#endif
+ return 25000;
+ case IFM_40G_CR4:
+ case IFM_40G_SR4:
+ case IFM_40G_LR4:
+ case IFM_40G_KR4:
+#ifdef IFM_40G_ER4
+ case IFM_40G_ER4:
+#endif
+ return 40000;
+ case IFM_50G_CR2:
+ case IFM_50G_KR2:
+#ifdef IFM_50G_SR2
+ case IFM_50G_SR2:
+#endif
+#ifdef IFM_50G_LR2
+ case IFM_50G_LR2:
+#endif
+#ifdef IFM_50G_KR
+ case IFM_50G_KR:
+#endif
+#ifdef IFM_50G_SR
+ case IFM_50G_SR:
+#endif
+#ifdef IFM_50G_CR
+ case IFM_50G_CR:
+#endif
+#ifdef IFM_50G_LR
+ case IFM_50G_LR:
+#endif
+#ifdef IFM_50G_FR
+ case IFM_50G_FR:
+#endif
+ return 50000;
+ case IFM_100G_CR4:
+ case IFM_100G_SR4:
+ case IFM_100G_KR4:
+ case IFM_100G_LR4:
+#ifdef IFM_100G_CR2
+ case IFM_100G_CR2:
+#endif
+#ifdef IFM_100G_SR2
+ case IFM_100G_SR2:
+#endif
+#ifdef IFM_100G_KR2
+ case IFM_100G_KR2:
+#endif
+#ifdef IFM_100G_DR
+ case IFM_100G_DR:
+#endif
+#ifdef IFM_100G_FR
+ case IFM_100G_FR:
+#endif
+#ifdef IFM_100G_LR
+ case IFM_100G_LR:
+#endif
+ return 100000;
+#ifdef IFM_200G_CR4
+ case IFM_200G_CR4:
+#endif
+#ifdef IFM_200G_SR4
+ case IFM_200G_SR4:
+#endif
+#ifdef IFM_200G_KR4
+ case IFM_200G_KR4:
+#endif
+#ifdef IFM_200G_LR4
+ case IFM_200G_LR4:
+#endif
+#ifdef IFM_200G_FR4
+ case IFM_200G_FR4:
+#endif
+#ifdef IFM_200G_DR4
+ case IFM_200G_DR4:
+#endif
+ return 200000;
+#ifdef IFM_400G_CR8
+ case IFM_400G_CR8:
+#endif
+#ifdef IFM_400G_SR8
+ case IFM_400G_SR8:
+#endif
+#ifdef IFM_400G_KR8
+ case IFM_400G_KR8:
+#endif
+#ifdef IFM_400G_LR8
+ case IFM_400G_LR8:
+#endif
+#ifdef IFM_400G_FR8
+ case IFM_400G_FR8:
+#endif
+#ifdef IFM_400G_DR8
+ case IFM_400G_DR8:
+#endif
+#ifdef IFM_400G_CR4
+ case IFM_400G_CR4:
+#endif
+#ifdef IFM_400G_SR4
+ case IFM_400G_SR4:
+#endif
+#ifdef IFM_400G_DR4
+ case IFM_400G_DR4:
+#endif
+#ifdef IFM_400G_FR4
+ case IFM_400G_FR4:
+#endif
+#ifdef IFM_400G_LR4
+ case IFM_400G_LR4:
+#endif
+ return 400000;
+#ifdef IFM_800G_CR8
+ case IFM_800G_CR8:
+#endif
+#ifdef IFM_800G_SR8
+ case IFM_800G_SR8:
+#endif
+#ifdef IFM_800G_DR8
+ case IFM_800G_DR8:
+#endif
+#ifdef IFM_800G_FR8
+ case IFM_800G_FR8:
+#endif
+#ifdef IFM_800G_LR8
+ case IFM_800G_LR8:
+#endif
+ return 800000;
+ default:
+ return 0;
+ }
+}
+
+int
+osdep_iface_link_get(const char *if_name, struct osdep_iface_link *link)
+{
+ struct ifmediareq ifmr;
+ struct ifreq ifr;
+ int if_fd;
+ int subtype;
+
+ memset(link, 0, sizeof(*link));
+
+ if_fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (if_fd == -1)
+ return -1;
+
+ /* Get interface flags to determine administrative status */
+ memset(&ifr, 0, sizeof(ifr));
+ strlcpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name));
+ if (ioctl(if_fd, SIOCGIFFLAGS, &ifr) == 0) {
+ if (ifr.ifr_flags & IFF_UP)
+ link->link_status = 1;
+ }
+
+ /* Get media status for speed, duplex, and link state */
+ memset(&ifmr, 0, sizeof(ifmr));
+ strlcpy(ifmr.ifm_name, if_name, sizeof(ifmr.ifm_name));
+
+ if (ioctl(if_fd, SIOCGIFMEDIA, &ifmr) == 0) {
+ /* Check if link is actually active */
+ if (!(ifmr.ifm_status & IFM_ACTIVE))
+ link->link_status = 0;
+
+ /* Only parse media if we have a valid current media type */
+ if (ifmr.ifm_current != 0 && IFM_TYPE(ifmr.ifm_current) == IFM_ETHER) {
+ subtype = IFM_SUBTYPE(ifmr.ifm_current);
+ link->link_speed = media_subtype_to_speed(subtype);
+
+ /* Check duplex - FDX option means full duplex */
+ if (IFM_OPTIONS(ifmr.ifm_current) & IFM_FDX)
+ link->link_duplex = 1;
+ else
+ link->link_duplex = 0;
+ } else {
+ /* Default to full duplex if we can't determine */
+ link->link_duplex = 1;
+ }
+
+ /* Check autonegotiation status */
+ link->link_autoneg = (ifmr.ifm_current & IFM_AUTO) ? 1 : 0;
+ } else {
+ /*
+ * SIOCGIFMEDIA failed - interface may not support it.
+ * Default to reasonable values.
+ */
+ link->link_duplex = 1; /* Assume full duplex */
+ link->link_autoneg = 0;
+ }
+
+ close(if_fd);
+ return 0;
+}
diff --git a/drivers/net/pcap/pcap_osdep_linux.c b/drivers/net/pcap/pcap_osdep_linux.c
index df976417cb..c9cc1f5ebb 100644
--- a/drivers/net/pcap/pcap_osdep_linux.c
+++ b/drivers/net/pcap/pcap_osdep_linux.c
@@ -9,6 +9,8 @@
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
+#include <linux/ethtool.h>
+#include <linux/sockios.h>

#include <rte_string_fns.h>

@@ -40,3 +42,113 @@ osdep_iface_mac_get(const char *if_name, struct rte_ether_addr *mac)
close(if_fd);
return 0;
}
+
+/*
+ * Get link speed, duplex, and autoneg using ETHTOOL_GLINKSETTINGS.
+ *
+ * ETHTOOL_GLINKSETTINGS was introduced in kernel 4.7 and supports
+ * speeds beyond 65535 Mbps (up to 800 Gbps and beyond).
+ * DPDK requires kernel 4.19 or later, so this interface is always available.
+ *
+ * Returns 0 on success, -1 on failure.
+ */
+static int
+get_link_settings(int fd, struct ifreq *ifr, struct osdep_iface_link *link)
+{
+ struct {
+ struct ethtool_link_settings req;
+ uint32_t link_mode_masks[3 * 127]; /* 3 masks * max words */
+ } ecmd;
+ int nwords;
+
+ memset(&ecmd, 0, sizeof(ecmd));
+ ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
+
+ ifr->ifr_data = (void *)&ecmd;
+
+ /* First call with nwords = 0 to get the required size */
+ if (ioctl(fd, SIOCETHTOOL, ifr) < 0)
+ return -1;
+
+ /* Kernel returns negative nwords on first call */
+ if (ecmd.req.link_mode_masks_nwords >= 0)
+ return -1;
+
+ nwords = -ecmd.req.link_mode_masks_nwords;
+
+ /* Sanity check */
+ if (nwords == 0 || nwords > 127)
+ return -1;
+
+ /* Second call with correct nwords */
+ memset(&ecmd, 0, sizeof(ecmd));
+ ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
+ ecmd.req.link_mode_masks_nwords = nwords;
+ ifr->ifr_data = (void *)&ecmd;
+
+ if (ioctl(fd, SIOCETHTOOL, ifr) < 0)
+ return -1;
+
+ /* Speed is in Mbps, directly usable */
+ link->link_speed = ecmd.req.speed;
+
+ /* Handle special values */
+ if (link->link_speed == (uint32_t)SPEED_UNKNOWN ||
+ link->link_speed == (uint32_t)-1)
+ link->link_speed = 0;
+
+ switch (ecmd.req.duplex) {
+ case DUPLEX_FULL:
+ link->link_duplex = 1;
+ break;
+ case DUPLEX_HALF:
+ link->link_duplex = 0;
+ break;
+ default:
+ link->link_duplex = 1; /* Default to full duplex */
+ break;
+ }
+
+ link->link_autoneg = (ecmd.req.autoneg == AUTONEG_ENABLE) ? 1 : 0;
+
+ return 0;
+}
+
+int
+osdep_iface_link_get(const char *if_name, struct osdep_iface_link *link)
+{
+ struct ifreq ifr;
+ int if_fd;
+
+ memset(link, 0, sizeof(*link));
+
+ if_fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (if_fd == -1)
+ return -1;
+
+ /* Get interface flags to determine link status */
+ rte_strscpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name));
+ if (ioctl(if_fd, SIOCGIFFLAGS, &ifr) == 0) {
+ /*
+ * IFF_UP means administratively up
+ * IFF_RUNNING means operationally up (carrier detected)
+ */
+ if ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING))
+ link->link_status = 1;
+ }
+
+ rte_strscpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name));
+ if (get_link_settings(if_fd, &ifr, link) < 0) {
+ /*
+ * ethtool failed - interface may not support it
+ * (e.g., virtual interfaces like veth, lo).
+ * Use reasonable defaults.
+ */
+ link->link_speed = 0;
+ link->link_duplex = 1; /* Assume full duplex */
+ link->link_autoneg = 0;
+ }
+
+ close(if_fd);
+ return 0;
+}
diff --git a/drivers/net/pcap/pcap_osdep_windows.c b/drivers/net/pcap/pcap_osdep_windows.c
index 1d398dc7ed..1b76ae3185 100644
--- a/drivers/net/pcap/pcap_osdep_windows.c
+++ b/drivers/net/pcap/pcap_osdep_windows.c
@@ -61,38 +61,56 @@ osdep_iface_index_get(const char *device_name)
}

/*
- * libpcap takes device names like "\Device\NPF_{GUID}",
- * GetAdaptersAddresses() returns names in "{GUID}" form.
- * Try to extract GUID from device name, fall back to original device name.
+ * Helper function to get adapter information by name.
+ * Returns adapter info on success, NULL on failure.
+ * Caller must free the returned buffer.
*/
-int
-osdep_iface_mac_get(const char *device_name, struct rte_ether_addr *mac)
+static IP_ADAPTER_ADDRESSES *
+get_adapter_addresses(void)
{
- IP_ADAPTER_ADDRESSES *info = NULL, *cur = NULL;
- ULONG size, sys_ret;
- const char *adapter_name;
- int ret = -1;
+ IP_ADAPTER_ADDRESSES *info = NULL;
+ ULONG size;
+ DWORD sys_ret;

sys_ret = GetAdaptersAddresses(AF_UNSPEC, 0, NULL, NULL, &size);
if (sys_ret != ERROR_BUFFER_OVERFLOW) {
PMD_LOG(ERR, "GetAdapterAddresses() = %lu, expected %lu\n",
sys_ret, ERROR_BUFFER_OVERFLOW);
- return -1;
+ return NULL;
}

info = (IP_ADAPTER_ADDRESSES *)malloc(size);
if (info == NULL) {
PMD_LOG(ERR, "Cannot allocate adapter address info\n");
- return -1;
+ return NULL;
}

sys_ret = GetAdaptersAddresses(AF_UNSPEC, 0, NULL, info, &size);
if (sys_ret != ERROR_SUCCESS) {
PMD_LOG(ERR, "GetAdapterAddresses() = %lu\n", sys_ret);
free(info);
- return -1;
+ return NULL;
}

+ return info;
+}
+
+/*
+ * libpcap takes device names like "\Device\NPF_{GUID}",
+ * GetAdaptersAddresses() returns names in "{GUID}" form.
+ * Try to extract GUID from device name, fall back to original device name.
+ */
+int
+osdep_iface_mac_get(const char *device_name, struct rte_ether_addr *mac)
+{
+ IP_ADAPTER_ADDRESSES *info = NULL, *cur = NULL;
+ const char *adapter_name;
+ int ret = -1;
+
+ info = get_adapter_addresses();
+ if (info == NULL)
+ return -1;
+
adapter_name = iface_guid(device_name);
if (adapter_name == NULL)
adapter_name = device_name;
@@ -116,3 +134,56 @@ osdep_iface_mac_get(const char *device_name, struct rte_ether_addr *mac)
free(info);
return ret;
}
+
+int
+osdep_iface_link_get(const char *device_name, struct osdep_iface_link *link)
+{
+ IP_ADAPTER_ADDRESSES *info = NULL, *cur = NULL;
+ const char *adapter_name;
+ int ret = -1;
+
+ memset(link, 0, sizeof(*link));
+
+ info = get_adapter_addresses();
+ if (info == NULL)
+ return -1;
+
+ adapter_name = iface_guid(device_name);
+ if (adapter_name == NULL)
+ adapter_name = device_name;
+
+ for (cur = info; cur != NULL; cur = cur->Next) {
+ if (strcmp(cur->AdapterName, adapter_name) == 0) {
+ /* Check operational status */
+ if (cur->OperStatus == IfOperStatusUp)
+ link->link_status = 1;
+ else
+ link->link_status = 0;
+
+ /*
+ * TransmitLinkSpeed and ReceiveLinkSpeed are in bits/sec.
+ * Convert to Mbps. Use transmit speed as the link speed.
+ * For asymmetric links, this is a reasonable approximation.
+ */
+ if (cur->TransmitLinkSpeed != 0 &&
+ cur->TransmitLinkSpeed != (ULONG64)-1) {
+ link->link_speed =
+ (uint32_t)(cur->TransmitLinkSpeed / 1000000ULL);
+ }
+
+ /*
+ * Windows doesn't directly expose duplex/autoneg via
+ * GetAdaptersAddresses(). Default to full duplex.
+ * For more detailed info, WMI or OID queries would be needed.
+ */
+ link->link_duplex = 1; /* Assume full duplex */
+ link->link_autoneg = 0; /* Cannot determine */
+
+ ret = 0;
+ break;
+ }
+ }
+
+ free(info);
+ return ret;
+}
--
2.51.0