2 * swift implementation of syscall API
4 * Simulates the classic socket syscalls (socket, bind, send, recv).
5 * Implementation uses raw sockets (AF_INET, SOCK_RAW).
7 * Subsequently, implementation is to be ported into kernel space and
8 * the interface is going to be offered by the Linux syscall API.
10 * Heavily inspired by GLIBC's <sys/socket.h>
11 * (/usr/include/sys/socket.h).
13 * 2011, Razvan Deaconescu, razvan.deaconescu@cs.pub.ro
19 #include <sys/types.h>
20 #include <sys/socket.h>
21 #include <netinet/in.h>
25 #include "include/swift_types.h"
26 #include "include/swift_list.h"
29 * Add new socket to list. Called by sw_socket "syscall".
32 struct sock_list *list_add_socket(int s)
34 struct sock_list *ptr = malloc(sizeof(*ptr));
38 ptr->next = &sock_list_head;
39 ptr->prev = sock_list_head.prev;
40 sock_list_head.prev->next = ptr;
41 sock_list_head.prev = ptr;
48 * Bind socket to given address. Called by sw_bind "syscall".
51 struct sock_list *list_update_socket_address(int s, __CONST_SOCKADDR_ARG addr)
53 struct sock_list *ptr;
55 for (ptr = sock_list_head.next; ptr != &sock_list_head; ptr = ptr->next)
57 memcpy(&ptr->addr, addr, sizeof(ptr->addr));
65 * Get list element containing socket s. Called by sw_send* "syscalls".
68 struct sock_list *list_elem_from_socket(int s)
70 struct sock_list *ptr;
72 for (ptr = sock_list_head.next; ptr != &sock_list_head; ptr = ptr->next)
80 * Get list element containing address addr. Called by sw_bind "syscall".
83 struct sock_list *list_elem_from_address(__CONST_SOCKADDR_ARG addr)
85 struct sock_list *ptr;
87 for (ptr = sock_list_head.next; ptr != &sock_list_head; ptr = ptr->next) {
88 if (ptr->bind_state == STATE_NOTBOUND)
90 if (memcmp(&ptr->addr, addr, sizeof(addr)) == 0)
98 * Unlink socket from list. Called by list_remove_socket.
100 static struct sock_list *list_unlink_socket(int s)
102 struct sock_list *ptr;
104 for (ptr = sock_list_head.next; ptr != &sock_list_head; ptr = ptr->next)
106 ptr->next->prev = ptr->prev;
107 ptr->prev->next = ptr->next;
117 * Remove socket from list. Called by sw_close "syscall".
120 int list_remove_socket(int s)
122 struct sock_list *ptr;
124 ptr = list_unlink_socket(s);
133 * Check if a socket is bound.
135 int list_socket_is_bound(int s)
137 struct sock_list *ptr;
139 for (ptr = sock_list_head.next; ptr != &sock_list_head; ptr = ptr->next)
141 if (ptr->bind_state == STATE_BOUND)