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cosmopolitan/libc/sock/internal.h
Justine Tunney 5144c22189 Add test for ioctl(SIOCGIFCONF) and polyfill on BSDs 
- Use nullness checks when calling weakly linked functions.

- Avoid typedef for reasons described in Linux Kernel style guide.

- Avoid enum in in Windows headers. Earlier in Cosmo's history all one
  hundred files in libc/nt/enum/ used to be enums and it resulted in
  gigabytes of DWARF data almost as large as everything else in the
  codebase combined.

- Bitfields aren't our friends. They have frequent ABI breakages,
  inconsistent arithmetic across compilers, and different endianness
  between cpus. Compiler authors also haven't invested much roi into
  making bit fields go fast so they produce poor assembly.

- Use memccpy() instead of strncpy() or snprintf() for length-bounded
  copying of C strings. strncpy() is a misunderstood function and
  snprintf() is awesome but memccpy() deserves more love.
2021-06-25 18:44:04 -07:00

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#ifndef COSMOPOLITAN_LIBC_SOCK_INTERNAL_H_
#define COSMOPOLITAN_LIBC_SOCK_INTERNAL_H_
#include "libc/bits/bits.h"
#include "libc/calls/internal.h"
#include "libc/nt/thunk/msabi.h"
#include "libc/nt/winsock.h"
#include "libc/sock/select.h"
#include "libc/sock/sock.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
#define FD_READ (1 << FD_READ_BIT)
#define FD_READ_BIT 0
#define FD_WRITE (1 << FD_WRITE_BIT)
#define FD_WRITE_BIT 1
#define FD_OOB (1 << FD_OOB_BIT)
#define FD_OOB_BIT 2
#define FD_ACCEPT (1 << FD_ACCEPT_BIT)
#define FD_ACCEPT_BIT 3
#define FD_CONNECT (1 << FD_CONNECT_BIT)
#define FD_CONNECT_BIT 4
#define FD_CLOSE (1 << FD_CLOSE_BIT)
#define FD_CLOSE_BIT 5
struct sockaddr_bsd {
uint8_t sa_len; /* « different type */
uint8_t sa_family; /* « different type */
char sa_data[14];
};
struct sockaddr_in_bsd {
uint8_t sin_len; /* « different type */
uint8_t sin_family; /* « different type */
uint16_t sin_port;
struct in_addr sin_addr;
uint8_t sin_zero[8];
};
struct msghdr_bsd {
void *msg_name;
uint32_t msg_namelen;
struct iovec *msg_iov;
uint32_t msg_iovlen; /* « different type */
void *msg_control;
uint64_t msg_controllen;
uint32_t msg_flags; /* « different type */
};
struct sockaddr_un_bsd {
uint8_t sun_len; /* sockaddr len including NUL on freebsd but excluding it on
openbsd/xnu */
uint8_t sun_family;
char sun_path[108];
};
/* ------------------------------------------------------------------------------------*/
struct SockFd {
int family;
int type;
int protocol;
int64_t event;
bool32 (*AcceptEx)(int64_t sListenSocket, int64_t sAcceptSocket,
void *out_lpOutputBuffer /*[recvlen+local+remoteaddrlen]*/,
uint32_t dwReceiveDataLength,
uint32_t dwLocalAddressLength,
uint32_t dwRemoteAddressLength,
uint32_t *out_lpdwBytesReceived,
struct NtOverlapped *inout_lpOverlapped) __msabi;
};
hidden extern int64_t __iocp;
errno_t __dos2errno(uint32_t);
int32_t __sys_accept(int32_t, void *, uint32_t *, int) nodiscard hidden;
int32_t __sys_accept4(int32_t, void *, uint32_t *, int) nodiscard hidden;
int32_t __sys_connect(int32_t, const void *, uint32_t) hidden;
int32_t __sys_socket(int32_t, int32_t, int32_t) hidden;
int32_t __sys_getsockname(int32_t, void *, uint32_t *) hidden;
int32_t __sys_getpeername(int32_t, void *, uint32_t *) hidden;
int32_t __sys_socketpair(int32_t, int32_t, int32_t, int32_t[2]) hidden;
int32_t sys_accept4(int32_t, void *, uint32_t *, int) nodiscard hidden;
int32_t sys_accept(int32_t, void *, uint32_t *) hidden;
int32_t sys_bind(int32_t, const void *, uint32_t) hidden;
int32_t sys_connect(int32_t, const void *, uint32_t) hidden;
int32_t sys_getsockopt(int32_t, int32_t, int32_t, void *, uint32_t *) hidden;
int32_t sys_listen(int32_t, int32_t) hidden;
int32_t sys_getsockname(int32_t, void *, uint32_t *) hidden;
int32_t sys_getpeername(int32_t, void *, uint32_t *) hidden;
int32_t sys_poll(struct pollfd *, uint64_t, signed) hidden;
int32_t sys_shutdown(int32_t, int32_t) hidden;
int32_t sys_socket(int32_t, int32_t, int32_t) hidden;
int32_t sys_socketpair(int32_t, int32_t, int32_t, int32_t[2]) hidden;
int64_t sys_readv(int32_t, const struct iovec *, int32_t) hidden;
int64_t sys_writev(int32_t, const struct iovec *, int32_t) hidden;
ssize_t sys_recvfrom(int, void *, size_t, int, void *, uint32_t *) hidden;
ssize_t sys_sendto(int, const void *, size_t, int, const void *,
uint32_t) hidden;
ssize_t sys_sendmsg(int, const struct msghdr *, int) hidden;
ssize_t sys_recvmsg(int, struct msghdr *, int) hidden;
int32_t sys_select(int32_t, fd_set *, fd_set *, fd_set *,
struct timeval *) hidden;
int sys_setsockopt(int, int, int, const void *, uint32_t) hidden;
int32_t sys_epoll_create(int32_t) hidden;
int32_t sys_epoll_ctl(int32_t, int32_t, int32_t, void *) hidden;
int32_t sys_epoll_wait(int32_t, void *, int32_t, int32_t) hidden;
int sys_poll_nt(struct pollfd *, uint64_t, uint64_t) hidden;
int sys_getsockopt_nt(struct Fd *, int, int, void *, uint32_t *) hidden;
int sys_getsockname_nt(struct Fd *, void *, uint32_t *) hidden;
int sys_getpeername_nt(struct Fd *, void *, uint32_t *) hidden;
int sys_listen_nt(struct Fd *, int) hidden;
int sys_connect_nt(struct Fd *, const void *, uint32_t) hidden;
int sys_bind_nt(struct Fd *, const void *, uint32_t);
int sys_accept_nt(struct Fd *, void *, uint32_t *, int) hidden;
int sys_closesocket_nt(struct Fd *) hidden;
int sys_socket_nt(int, int, int) hidden;
/*
int sys_socketpair_nt_stream(int, int, int, int[2]) hidden;
int sys_socketpair_nt_dgram(int, int, int, int[2]) hidden;
*/
int sys_socketpair_nt(int, int, int, int[2]) hidden;
int sys_select_nt(int, fd_set *, fd_set *, fd_set *, struct timeval *) hidden;
int sys_shutdown_nt(struct Fd *, int) hidden;
int sys_setsockopt_nt(struct Fd *, int, int, const void *, uint32_t) hidden;
size_t __iovec2nt(struct NtIovec[hasatleast 16], const struct iovec *,
size_t) hidden;
ssize_t sys_sendto_nt(struct Fd *, const struct iovec *, size_t, uint32_t,
void *, uint32_t) hidden;
ssize_t sys_recvfrom_nt(struct Fd *, const struct iovec *, size_t, uint32_t,
void *, uint32_t *) hidden;
void WinSockInit(void) hidden;
int64_t __winsockerr(void) nocallback hidden;
int __fixupnewsockfd(int, int) hidden;
int64_t __winsockblock(int64_t, unsigned, int64_t) hidden;
int sys_close_epoll(int) hidden;
/**
* Converts sockaddr (Linux/Windows) → sockaddr_bsd (XNU/BSD).
*/
forceinline void sockaddr2bsd(void *saddr) {
char *p;
uint16_t fam;
if (saddr) {
p = saddr;
fam = READ16LE(p);
p[0] = sizeof(struct sockaddr_in_bsd);
p[1] = fam;
}
}
/**
* Converts sockaddr_in_bsd (XNU/BSD) → sockaddr (Linux/Windows).
*/
forceinline void sockaddr2linux(void *saddr) {
char *p, fam;
if (saddr) {
p = saddr;
fam = p[1];
WRITE16LE(p, fam);
}
}
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_SOCK_INTERNAL_H_ */
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