diff --git a/system/include/net/if.h b/system/include/net/if.h
index 9a4badf31..dd7884aa8 100644
--- a/system/include/net/if.h
+++ b/system/include/net/if.h
@@ -2,6 +2,10 @@
 #ifndef _NET_IF_H
 #define _NET_IF_H
 
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -11,6 +15,61 @@ struct if_nameindex {
   char     *if_name;
 };
 
+#define IFHWADDRLEN 6
+#define IFNAMSIZ 16
+
+struct ifmap {
+  unsigned long int mem_start;
+  unsigned long int mem_end;
+  unsigned short int base_addr;
+  unsigned char irq;
+  unsigned char dma;
+  unsigned char port;
+};
+
+struct ifreq {
+  union {
+    char ifrn_name[IFNAMSIZ];
+  } ifr_ifrn;
+  union {
+    struct sockaddr ifru_addr;
+    struct sockaddr ifru_destaddr;
+    struct sockaddr ifru_broadaddr;
+    struct sockaddr ifru_netmask;
+    struct sockaddr ifru_hwaddr;
+    short int ifru_flags;
+    int ifru_ivalue;
+    int ifru_mtu;
+    struct ifmap ifru_map;
+    char ifru_slave[IFNAMSIZ];
+    char ifru_newname[IFNAMSIZ];
+    caddr_t ifru_data;
+  } ifr_ifru;
+};
+#define ifr_name ifr_ifrn.ifrn_name
+#define ifr_addr ifr_ifru.ifru_addr
+#define ifr_destaddr ifr_ifru.ifru_destaddr
+#define ifr_broadaddr ifr_ifru.ifru_broadaddr
+#define ifr_netmask ifr_ifru.ifru_netmask
+#define ifr_hwaddr ifr_ifru.ifru_hwaddr
+#define ifr_flags ifr_ifru.ifru_flags
+#define ifr_ivalue ifr_ifru.ifru_ivalue
+#define ifr_mtu ifr_ifru.ifru_mtu
+#define ifr_map ifr_ifru.ifru_map
+#define ifr_slave ifr_ifru.ifru_slave
+#define ifr_newname ifr_ifru.ifru_newname
+#define ifr_data ifr_ifru.ifru_data
+
+struct ifconf {
+  int ifc_len;
+  union {
+    caddr_t ifcu_buf;
+    struct ifreq* ifcu_req;
+  } ifc_ifcu;
+};
+#define ifc_buf ifc_ifcu.ifcu_buf
+#define ifc_req ifc_ifcu.ifcu_req
+
 #define IF_NAMESIZE abort(0);
 
 unsigned             if_nametoindex(const char *a);
@@ -18,6 +77,8 @@ char                *if_indextoname(unsigned int a, char *b);
 struct if_nameindex *if_nameindex();
 void                 if_freenameindex(struct if_nameindex *a);
 
+
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/system/include/netdb.h b/system/include/netdb.h
new file mode 100644
index 000000000..20f876dff
--- /dev/null
+++ b/system/include/netdb.h
@@ -0,0 +1,55 @@
+#ifndef _NETDB_H
+#define _NETDB_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define HOST_NOT_FOUND 1
+#define TRY_AGAIN 2
+#define NO_RECOVERY 3
+#define NO_DATA 4
+
+#define IP_TOS 1
+#define IP_TTL 2
+#define IP_HDRINCL 3
+#define IP_OPTIONS 4
+#define IP_ROUTER_ALERT 5
+#define IP_RECVOPTS 6
+#define IP_RETOPTS 7
+#define IP_PKTINFO 8
+#define IP_PKTOPTIONS 9
+#define IP_MTU_DISCOVER 10
+#define IP_RECVERR 11
+#define IP_RECVTTL 12
+#define IP_RECVTOS 13
+#define IP_MTU 14
+#define IP_FREEBIND 15
+#define IP_IPSEC_POLICY 16
+#define IP_XFRM_POLICY 17
+#define IP_PASSSEC 18
+#define IP_TRANSPARENT 19
+
+typedef int socklen_t;
+
+struct hostent {
+  char*  h_name;
+  char** h_aliases;
+  int    h_addrtype;
+  int    h_length;
+  char** h_addr_list;
+};
+#define h_addr h_addr_list[0]
+
+struct hostent* gethostbyaddr(const void* addr, socklen_t len, int type);
+struct hostent* gethostbyname(const char* name);
+void sethostent(int stayopen);
+void endhostent(void);
+void herror(const char* s);
+const char* hstrerror(int err);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/system/include/sys/ioctl.h b/system/include/sys/ioctl.h
index 061ba9256..4d2c52972 100644
--- a/system/include/sys/ioctl.h
+++ b/system/include/sys/ioctl.h
@@ -1,7 +1,17 @@
+#ifndef _IOCTL_H
+#define _IOCTL_H
 
-/* ioctl.h */
+#ifdef __cplusplus
+extern "C" {
+#endif
 
-#define SO_RCVTIMEO 1000
-#define SO_SNDTIMEO 2000
+#define SIOCGIFCONF 1 // bogus value
+#define SIOCGIFNETMASK 2 // bogus value
 
+int ioctl(int d, int request, ...);
 
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/system/include/sys/socket.h b/system/include/sys/socket.h
index 2c23ddb7c..33c10932f 100644
--- a/system/include/sys/socket.h
+++ b/system/include/sys/socket.h
@@ -1,10 +1,14 @@
 #ifndef _SYS_SOCKET_H
 #define _SYS_SOCKET_H
 
+#include <netdb.h>
+#include <sys/select.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+// Note that the values of these constants are mostly arbitrary numbers.
 #define SOMAXCONN 128
 #define PF_INET 2
 #define SO_BROADCAST 6
@@ -17,8 +21,10 @@ extern "C" {
 #define SO_REUSEADDR 30
 #define SO_SNDBUF 40
 #define SO_RCVBUF 60
+#define SO_LINGER 70
+#define SO_NOSIGPIPE 80
 
-typedef int socklen_t;
+#define SHUT_RDWR 1
 
 typedef unsigned int sa_family_t;
 #define AF_INET 1
@@ -41,6 +47,7 @@ int bind(int sockfd, const struct sockaddr *my_addr, socklen_t addrlen);
 int listen(int sockfd, int backlog);
 int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen); 
 int connect(int sockfd, const struct sockaddr *serv_addr, socklen_t addrlen); 
+int shutdown(int sockfd, int how);
 int getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen);
 ssize_t recv(int s, void *buf, size_t len, int flags);
 ssize_t send(int s, const void *buf, size_t len, int flags);