HelenOS sources
NIC_ROLE_UNKNOWN 191 uspace/drv/nic/ar9271/ar9271.c *role = NIC_ROLE_UNKNOWN;
NIC_ROLE_UNKNOWN 365 uspace/drv/nic/e1k/e1k.c *role = NIC_ROLE_UNKNOWN;
NIC_ROLE_UNKNOWN 312 uspace/drv/nic/ne2k/ne2k.c *role = NIC_ROLE_UNKNOWN;
NIC_ROLE_UNKNOWN 1452 uspace/drv/nic/rtl8139/driver.c *role = NIC_ROLE_UNKNOWN;
NIC_ROLE_UNKNOWN 563 uspace/drv/nic/rtl8169/driver.c *role = NIC_ROLE_UNKNOWN;
NIC_ROLE_UNKNOWN 470 uspace/drv/nic/virtio-net/virtio-net.c *role = NIC_ROLE_UNKNOWN;
NIC_ROLE_UNKNOWN 1555 uspace/lib/drv/generic/remote_nic.c nic_role_t role = NIC_ROLE_UNKNOWN;
HelenOS homepage, sources at GitHub