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"""

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    Libc stuff

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"""

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cdef extern from "stdint.h":

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    # yes, these are "wrong"

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    ctypedef unsigned char uint8_t

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    ctypedef unsigned short uint16_t

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    ctypedef unsigned int uint32_t

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    ctypedef signed char int8_t

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    ctypedef signed short int16_t

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    ctypedef signed int int32_t

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# <linux/types.h>

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cdef extern from "linux/types.h" :

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    ctypedef uint8_t __u8

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    ctypedef uint16_t __u16

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    ctypedef uint32_t __u32

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    ctypedef int8_t __s8

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    ctypedef int16_t __s16

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    ctypedef int32_t __s32

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cdef extern from "string.h" :

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    void* memcpy (void *dest, void *src, size_t n)

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cdef extern from "alloca.h" :

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    void* alloca (size_t size)

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# <sys/socket.h>

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cdef extern from "sys/socket.h" :

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    enum :

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        SOCK_STREAM

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        SOCK_DGRAM

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        SOCK_SEQPACKET

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    enum :

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        PF_UNSPEC

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        PF_LOCAL

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        PF_INET

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        PF_INET6

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    # these are #defines

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    enum :

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        PF_UNIX

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        AF_UNSPEC

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        AF_LOCAL

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        AF_UNIX

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        AF_INET

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        AF_INET6

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    ctypedef uint16_t sa_family_t

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    ctypedef uint16_t in_port_t

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    ctypedef uint32_t in_addr_t

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    ## AF_INET

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    struct in_addr :

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        in_addr_t s_addr

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    struct sockaddr_in :

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        sa_family_t     sin_family

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        in_port_t       sin_port

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        in_addr         sin_addr

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    # XXX: should these be in another cdef?

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    in_addr_t INADDR_ANY

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    ## AF_INET6

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    struct in6_addr :

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        pass

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    struct sockaddr_in6 :

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        sa_family_t     sin6_family

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        in_port_t       sin6_port

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        uint32_t        sin6_flowinfo

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        in6_addr        sin6_addr

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        uint32_t        sin6_scope_id

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    # common in6_addr's

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    in6_addr in6addr_any

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    in6_addr in6addr_loopback

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    ## actually from bits/socket.h...

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    struct sockaddr :

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        sa_family_t     sa_family

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    struct sockaddr_storage :

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        sa_family_t     ss_family

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cdef extern from "arpa/inet.h" :

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    uint16_t htons(uint16_t)

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    uint32_t htonl(uint32_t)

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    uint16_t ntohs(uint16_t)

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    uint32_t ntohl(uint32_t)

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    # XXX: correct?!

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    ctypedef size_t socklen_t

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    ## constants

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    enum :

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        INET_ADDRSTRLEN

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        INET6_ADDRSTRLEN

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    char* c_inet_ntop "inet_ntop" (int af, void *sockaddr, char *buf, socklen_t len)

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    int c_inet_pton "inet_pton" (int af, char *src, void *dst)

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cdef extern from "netdb.h" :

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    int c_getnameinfo "getnameinfo" (

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            sockaddr *sa, socklen_t salen, 

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            char *host, size_t hostlen, 

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            char *serv, size_t servlen, 

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            int flags

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    )

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    enum :

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        NI_NOFQDN

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        NI_NUMERICHOST

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        NI_NAMEREQD

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        NI_NUMERICSERV

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        NI_DGRAM

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        NI_MAXHOST

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        NI_MAXSERV

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    char* gai_strerror (int err)

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# python-friendly wrapper around inet_ntop

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cdef object inet_ntop (int af, void *sockaddr)

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cdef object inet_pton (int af, char *addr, void *sockaddr_out)

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# sockaddr, flags -> (host, service)

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cdef object getnameinfo (sockaddr *sa, socklen_t salen, int flags)