Add socket and IPv4 support for x86_64

sys.h

@@ -37,6 +37,70 @@ int32_t openat(int32_t fd, const char* filename, uint32_t flags, uint32_t mode);
 int close(unsigned int fd);
 int fsync(unsigned int fd);
 
+// Socket syscalls
+int socket(int domain, int type, int protocol);
+int setsockopt(int sockfd, int level, int optname, const void* optval, uint64_t optlen);
+int bind(int sockfd, const void* sockaddr, uint64_t addrlen);
+int listen(int fd, int backlog);
+int accept(int sockfd, void* addr, uint64_t* addrlen);
+int connect(int sockfd, void* addr, uint64_t addrlen);
+int64_t sendto(int sockfd, const void* buf, uint64_t size, int flags, const void* sockaddr, uint64_t addrlen);
+#define send(sockfd, buf, size, flags) sendto(sockfd, buf, size, flags, 0, 0)
+int64_t recvfrom(int sockfd, const void* buf, uint64_t size, int flags, const void* sockaddr, uint64_t addrlen);
+#define recv(sockfd, buf, size, flags) recvfrom(sockfd, buf, size, flags, 0, 0)
+// Socket Domain constants
+typedef unsigned short  sa_family_t;
+/* Supported address families. */
+#define AF_UNIX     1   /* Unix domain sockets      */
+#define AF_LOCAL    1   /* POSIX name for AF_UNIX   */
+#define AF_INET     2   /* Internet IP Protocol     */
+#define AF_AX25     3   /* Amateur Radio AX.25      */
+#define AF_INET6    10  /* IP version 6         */
+#define AF_ROSE     11  /* Amateur Radio X.25 PLP   */
+#define AF_PACKET   17  /* Packet family        */
+#define AF_CAN      29  /* Controller Area Network      */
+#define AF_BLUETOOTH    31  /* Bluetooth sockets        */
+// Socket type constants
+enum sock_type {
+SOCK_STREAM = 1,
+SOCK_DGRAM  = 2,
+SOCK_RAW    = 3,
+SOCK_RDM    = 4,
+SOCK_SEQPACKET  = 5,
+SOCK_DCCP   = 6,
+SOCK_PACKET = 10,
+};
+
+#if defined(__mips__)
+  #define SOL_SOCKET    0xffff
+#else
+  #define SOL_SOCKET  1
+
+  #define SO_DEBUG        1
+  #define SO_REUSEADDR    2
+  #define SO_TYPE         3
+  #define SO_ERROR        4
+  #define SO_DONTROUTE    5
+  #define SO_BROADCAST    6
+  #define SO_SNDBUF       7
+  #define SO_RCVBUF       8
+  #define SO_SNDBUFFORCE  32
+  #define SO_RCVBUFFORCE  33
+  #define SO_KEEPALIVE    9
+  #define SO_OOBINLINE    10
+  #define SO_NO_CHECK     11
+  #define SO_PRIORITY     12
+  #define SO_LINGER       13
+  #define SO_BSDCOMPAT    14
+  #define SO_REUSEPORT    15
+  #define SO_PASSCRED     16
+  #define SO_PEERCRED     17
+  #define SO_RCVLOWAT     18
+  #define SO_SNDLOWAT     19
+  #define SO_RCVTIMEO     20
+  #define SO_SNDTIMEO     21
+#endif
+
 uint32_t fork();
 
 // Provide memset for clang