ef8d499e2d
This commit adds a new TCP/IP service to MINIX 3. As its core, the service uses the lwIP TCP/IP stack for maintenance reasons. The service aims to be compatible with NetBSD userland, including its low-level network management utilities. It also aims to support modern features such as IPv6. In summary, the new LWIP service has support for the following main features: - TCP, UDP, RAW sockets with mostly standard BSD API semantics; - IPv6 support: host mode (complete) and router mode (partial); - most of the standard BSD API socket options (SO_); - all of the standard BSD API message flags (MSG_); - the most used protocol-specific socket and control options; - a default loopback interface and the ability to create one more; - configuration-free ethernet interfaces and driver tracking; - queuing and multiple concurrent requests to each ethernet driver; - standard ioctl(2)-based BSD interface management; - radix tree backed, destination-based routing; - routing sockets for standard BSD route reporting and management; - multicast traffic and multicast group membership tracking; - Berkeley Packet Filter (BPF) devices; - standard and custom sysctl(7) nodes for many internals; - a slab allocation based, hybrid static/dynamic memory pool model. Many of its modules come with fairly elaborate comments that cover many aspects of what is going on. The service is primarily a socket driver built on top of the libsockdriver library, but for BPF devices it is at the same time also a character driver. Change-Id: Ib0c02736234b21143915e5fcc0fda8fe408f046f
156 lines
6.6 KiB
C
156 lines
6.6 KiB
C
#ifndef MINIX_NET_LWIP_IFDEV_H
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#define MINIX_NET_LWIP_IFDEV_H
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#include <net/if.h>
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#include <net/if_types.h>
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#include <netinet6/in6_var.h>
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#include <netinet6/nd6.h>
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/*
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* NetBSD makes setting a hardware address through ifconfig(8) a whole lot
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* harder than it needs to be, namely by keeping a list of possible hardware
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* addresses and marking one of them as active. For us, that level of extra
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* flexibility is completely useless. In order to shield individual interface
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* modules from having to deal with the rather extended interface for the list
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* management, we maintain the list in ifdev and simply use a iop_set_hwaddr()
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* call to the modules when the active address changes. This setting is the
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* maximum number of hardware addresses in the list maintained by ifdev. It
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* should be at least 2, or changing hardware addresses will not be possible.
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*/
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#define IFDEV_NUM_HWADDRS 3
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struct ifdev;
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struct bpfdev_link;
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struct sockaddr_dlx;
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/* Interface operations table. */
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struct ifdev_ops {
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err_t (* iop_init)(struct ifdev * ifdev, struct netif * netif);
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err_t (* iop_input)(struct pbuf * pbuf, struct netif * netif);
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err_t (* iop_output)(struct ifdev * ifdev, struct pbuf * pbuf,
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struct netif * netif);
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err_t (* iop_output_v4)(struct netif * netif, struct pbuf * pbuf,
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const ip4_addr_t * ipaddr);
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err_t (* iop_output_v6)(struct netif * netif, struct pbuf * pbuf,
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const ip6_addr_t * ipaddr);
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void (* iop_hdrcmplt)(struct ifdev * ifdev, struct pbuf * pbuf);
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void (* iop_poll)(struct ifdev * ifdev);
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int (* iop_set_ifflags)(struct ifdev * ifdev, unsigned int ifflags);
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void (* iop_get_ifcap)(struct ifdev * ifdev, uint64_t * ifcap,
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uint64_t * ifena);
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int (* iop_set_ifcap)(struct ifdev * ifdev, uint64_t ifcap);
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void (* iop_get_ifmedia)(struct ifdev * ifdev, int * ifcurrent,
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int * ifactive);
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int (* iop_set_ifmedia)(struct ifdev * ifdev, int ifmedia);
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void (* iop_set_promisc)(struct ifdev * ifdev, int promisc);
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int (* iop_set_hwaddr)(struct ifdev * ifdev, const uint8_t * hwaddr);
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int (* iop_set_mtu)(struct ifdev * ifdev, unsigned int mtu);
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int (* iop_destroy)(struct ifdev * ifdev);
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};
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/* Hardware address list entry. The first entry, if any, is the active one. */
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struct ifdev_hwaddr {
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uint8_t ifhwa_addr[NETIF_MAX_HWADDR_LEN];
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uint8_t ifhwa_flags;
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};
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#define IFHWAF_VALID 0x01 /* entry contains an address */
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#define IFHWAF_FACTORY 0x02 /* factory (device-given) address */
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/* Interface structure. */
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struct ifdev {
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TAILQ_ENTRY(ifdev) ifdev_next; /* list of active interfaces */
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char ifdev_name[IFNAMSIZ]; /* interface name, null terminated */
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unsigned int ifdev_ifflags; /* NetBSD-style interface flags */
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unsigned int ifdev_dlt; /* data link type (DLT_) */
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unsigned int ifdev_promisc; /* number of promiscuity requestors */
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struct netif ifdev_netif; /* lwIP interface structure */
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struct if_data ifdev_data; /* NetBSD-style interface data */
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char ifdev_v4set; /* interface has an IPv4 address? */
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uint8_t ifdev_v6prefix[LWIP_IPV6_NUM_ADDRESSES]; /* IPv6 prefixes */
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uint8_t ifdev_v6flags[LWIP_IPV6_NUM_ADDRESSES]; /* v6 address flags */
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uint8_t ifdev_v6state[LWIP_IPV6_NUM_ADDRESSES]; /* v6 shadow states */
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uint8_t ifdev_v6scope[LWIP_IPV6_NUM_ADDRESSES]; /* cached v6 scopes */
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struct ifdev_hwaddr ifdev_hwlist[IFDEV_NUM_HWADDRS]; /* HW addr's */
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uint32_t ifdev_nd6flags; /* ND6-related flags (ND6_IFF_) */
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const struct ifdev_ops *ifdev_ops; /* interface operations table */
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TAILQ_HEAD(, bpfdev_link) ifdev_bpf; /* list of attached BPF devices */
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};
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#define ifdev_get_name(ifdev) ((ifdev)->ifdev_name)
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#define ifdev_get_ifflags(ifdev) ((ifdev)->ifdev_ifflags)
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#define ifdev_get_dlt(ifdev) ((ifdev)->ifdev_dlt)
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#define ifdev_is_promisc(ifdev) ((ifdev)->ifdev_promisc != 0)
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#define ifdev_get_netif(ifdev) (&(ifdev)->ifdev_netif)
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#define ifdev_get_nd6flags(ifdev) ((ifdev)->ifdev_nd6flags)
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#define ifdev_get_iftype(ifdev) ((ifdev)->ifdev_data.ifi_type)
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#define ifdev_get_hwlen(ifdev) ((ifdev)->ifdev_data.ifi_addrlen)
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#define ifdev_get_hdrlen(ifdev) ((ifdev)->ifdev_data.ifi_hdrlen)
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#define ifdev_get_link(ifdev) ((ifdev)->ifdev_data.ifi_link_state)
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#define ifdev_get_mtu(ifdev) ((ifdev)->ifdev_data.ifi_mtu)
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#define ifdev_get_metric(ifdev) ((ifdev)->ifdev_data.ifi_metric)
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#define ifdev_get_ifdata(ifdev) (&(ifdev)->ifdev_data)
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#define ifdev_is_loopback(ifdev) ((ifdev)->ifdev_ifflags & IFF_LOOPBACK)
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#define ifdev_is_up(ifdev) ((ifdev)->ifdev_ifflags & IFF_UP)
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#define ifdev_is_link_up(ifdev) (netif_is_link_up(&(ifdev)->ifdev_netif))
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#define ifdev_set_metric(ifdev, metric) \
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((void)((ifdev)->ifdev_data.ifi_metric = (metric)))
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#define ifdev_get_index(ifdev) \
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((uint32_t)(netif_get_index(ifdev_get_netif(ifdev))))
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#define ifdev_output_drop(ifdev) ((ifdev)->ifdev_data.ifi_oerrors++)
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#define netif_get_ifdev(netif) ((struct ifdev *)(netif)->state)
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void ifdev_init(void);
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void ifdev_poll(void);
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void ifdev_register(const char * name, int (* create)(const char *));
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void ifdev_input(struct ifdev * ifdev, struct pbuf * pbuf,
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struct netif * netif, int to_bpf);
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err_t ifdev_output(struct ifdev * ifdev, struct pbuf * pbuf,
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struct netif * netif, int to_bpf, int hdrcmplt);
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void ifdev_attach_bpf(struct ifdev * ifdev, struct bpfdev_link * bpfl);
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void ifdev_detach_bpf(struct ifdev * ifdev, struct bpfdev_link * bpfl);
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struct ifdev *ifdev_get_by_index(uint32_t ifindex);
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struct ifdev *ifdev_find_by_name(const char * name);
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struct ifdev *ifdev_enum(struct ifdev * last);
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int ifdev_check_name(const char * name, unsigned int * vtype_slot);
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int ifdev_set_promisc(struct ifdev * ifdev);
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void ifdev_clear_promisc(struct ifdev * ifdev);
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int ifdev_set_ifflags(struct ifdev * ifdev, unsigned int ifflags);
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void ifdev_update_ifflags(struct ifdev * ifdev, unsigned int ifflags);
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void ifdev_get_ifcap(struct ifdev * ifdev, uint64_t * ifcap,
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uint64_t * ifena);
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int ifdev_set_ifcap(struct ifdev * ifdev, uint64_t ifena);
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int ifdev_get_ifmedia(struct ifdev * ifdev, int * ifcurrent, int * ifactive);
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int ifdev_set_ifmedia(struct ifdev * ifdev, int ifmedia);
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int ifdev_set_mtu(struct ifdev * ifdev, unsigned int mtu);
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int ifdev_set_nd6flags(struct ifdev * ifdev, uint32_t nd6flags);
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void ifdev_add(struct ifdev * ifdev, const char * name, unsigned int ifflags,
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unsigned int iftype, size_t hdrlen, size_t addrlen, unsigned int dlt,
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unsigned int mtu, uint32_t nd6flags, const struct ifdev_ops * iop);
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int ifdev_remove(struct ifdev * ifdev);
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struct ifdev *ifdev_get_loopback(void);
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void ifdev_update_link(struct ifdev * ifdev, int link);
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void ifdev_update_hwaddr(struct ifdev * ifdev, const uint8_t * hwaddr,
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int is_factory);
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int ifdev_create(const char * name);
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int ifdev_destroy(struct ifdev * ifdev);
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const char *ifdev_enum_vtypes(unsigned int num);
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#endif /* !MINIX_NET_LWIP_IFDEV_H */
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