- libnetsock - internal implementation of a socket on the lwip server side. it encapsulates the asynchronous protocol - lwip server - uses libnetsock to work with the asynchronous protocol
419 lines
9.4 KiB
C
419 lines
9.4 KiB
C
#include <stdlib.h>
|
|
|
|
#include <minix/sysutil.h>
|
|
|
|
#include <sys/ioc_net.h>
|
|
#include <net/gen/in.h>
|
|
#include <net/gen/udp.h>
|
|
#include <net/gen/udp_io.h>
|
|
#include <net/gen/udp_io_hdr.h>
|
|
|
|
#include <lwip/udp.h>
|
|
#include <lwip/ip_addr.h>
|
|
|
|
#include <minix/netsock.h>
|
|
#include "proto.h"
|
|
|
|
#define UDP_BUF_SIZE (4 << 10)
|
|
|
|
#define sock_alloc_buf(s) debug_malloc(s)
|
|
#define sock_free_buf(x) debug_free(x)
|
|
|
|
#if 0
|
|
#define debug_udp_print(str, ...) printf("LWIP %s:%d : " str "\n", \
|
|
__func__, __LINE__, ##__VA_ARGS__)
|
|
#else
|
|
#define debug_udp_print(...) debug_print(__VA_ARGS__)
|
|
#endif
|
|
|
|
struct udp_recv_data {
|
|
ip_addr_t ip;
|
|
u16_t port;
|
|
struct pbuf * pbuf;
|
|
};
|
|
|
|
#define udp_recv_alloc() debug_malloc(sizeof(struct udp_recv_data))
|
|
|
|
static void udp_recv_free(void * data)
|
|
{
|
|
if (((struct udp_recv_data *)data)->pbuf)
|
|
pbuf_free(((struct udp_recv_data *)data)->pbuf);
|
|
debug_free(data);
|
|
}
|
|
|
|
static int udp_op_open(struct socket * sock, __unused message * m)
|
|
{
|
|
struct udp_pcb * pcb;
|
|
|
|
debug_udp_print("socket num %ld", get_sock_num(sock));
|
|
|
|
if (!(pcb = udp_new()))
|
|
return ENOMEM;
|
|
|
|
sock->buf = NULL;
|
|
sock->buf_size = 0;
|
|
|
|
sock->pcb = pcb;
|
|
|
|
return OK;
|
|
}
|
|
|
|
static void udp_op_close(struct socket * sock, __unused message * m)
|
|
{
|
|
debug_udp_print("socket num %ld", get_sock_num(sock));
|
|
|
|
/* deque and free all enqueued data before closing */
|
|
sock_dequeue_data_all(sock, udp_recv_free);
|
|
|
|
if (sock->pcb)
|
|
udp_remove(sock->pcb);
|
|
assert(sock->buf == NULL);
|
|
|
|
/* mark it as unused */
|
|
sock->ops = NULL;
|
|
|
|
sock_reply_close(sock, OK);
|
|
}
|
|
|
|
static int udp_do_receive(struct socket * sock,
|
|
message * m,
|
|
struct udp_pcb *pcb,
|
|
struct pbuf *pbuf,
|
|
ip_addr_t *addr,
|
|
u16_t port)
|
|
{
|
|
struct pbuf * p;
|
|
unsigned rem_len = m->COUNT;
|
|
unsigned written = 0, hdr_sz = 0;
|
|
int err;
|
|
|
|
debug_udp_print("user buffer size : %d", rem_len);
|
|
|
|
/* FIXME make it both a single copy */
|
|
if (!(sock->usr_flags & NWUO_RWDATONLY)) {
|
|
udp_io_hdr_t hdr;
|
|
|
|
hdr.uih_src_addr = addr->addr;
|
|
hdr.uih_src_port = htons(port);
|
|
hdr.uih_dst_addr = pcb->local_ip.addr;
|
|
hdr.uih_dst_port = htons(pcb->local_port);
|
|
|
|
hdr.uih_data_len = 0;
|
|
hdr.uih_ip_opt_len = 0;
|
|
|
|
err = copy_to_user(m->m_source,
|
|
&hdr, sizeof(hdr),
|
|
(cp_grant_id_t) m->IO_GRANT,
|
|
0);
|
|
|
|
if (err != OK)
|
|
return err;
|
|
|
|
rem_len -= (hdr_sz = sizeof(hdr));
|
|
}
|
|
|
|
for (p = pbuf; p && rem_len; p = p->next) {
|
|
size_t cp_len;
|
|
|
|
cp_len = (rem_len < p->len) ? rem_len : p->len;
|
|
err = copy_to_user(m->m_source, p->payload, cp_len,
|
|
(cp_grant_id_t) m->IO_GRANT,
|
|
hdr_sz + written);
|
|
|
|
if (err != OK)
|
|
return err;
|
|
|
|
written += cp_len;
|
|
rem_len -= cp_len;
|
|
}
|
|
|
|
debug_udp_print("copied %d bytes", written + hdr_sz);
|
|
return written + hdr_sz;
|
|
}
|
|
|
|
static void udp_recv_callback(void *arg,
|
|
struct udp_pcb *pcb,
|
|
struct pbuf *pbuf,
|
|
ip_addr_t *addr,
|
|
u16_t port)
|
|
{
|
|
struct socket * sock = (struct socket *) arg;
|
|
struct udp_recv_data * data;
|
|
|
|
debug_udp_print("socket num : %ld addr : %x port : %d\n",
|
|
get_sock_num(sock), (unsigned int) addr->addr, port);
|
|
|
|
if (sock->flags & SOCK_FLG_OP_PENDING) {
|
|
/* we are resuming a suspended operation */
|
|
int ret;
|
|
|
|
ret = udp_do_receive(sock, &sock->mess, pcb, pbuf, addr, port);
|
|
|
|
if (ret > 0) {
|
|
pbuf_free(pbuf);
|
|
sock_reply(sock, ret);
|
|
sock->flags &= ~SOCK_FLG_OP_PENDING;
|
|
return;
|
|
} else {
|
|
sock_reply(sock, ret);
|
|
sock->flags &= ~SOCK_FLG_OP_PENDING;
|
|
}
|
|
}
|
|
|
|
/* Do not enqueue more data than allowed */
|
|
if (sock->recv_data_size > UDP_BUF_SIZE) {
|
|
pbuf_free(pbuf);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* nobody is waiting for the data or an error occured above, we enqueue
|
|
* the packet
|
|
*/
|
|
if (!(data = udp_recv_alloc())) {
|
|
pbuf_free(pbuf);
|
|
return;
|
|
}
|
|
|
|
data->ip = *addr;
|
|
data->port = port;
|
|
data->pbuf = pbuf;
|
|
|
|
if (sock_enqueue_data(sock, data, data->pbuf->tot_len) != OK) {
|
|
udp_recv_free(data);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We don't need to notify when somebody is already waiting, reviving
|
|
* read operation will do the trick for us. But we must announce new
|
|
* data available here.
|
|
*/
|
|
if (sock_select_read_set(sock))
|
|
sock_select_notify(sock);
|
|
}
|
|
|
|
static void udp_op_read(struct socket * sock, message * m, int blk)
|
|
{
|
|
debug_udp_print("socket num %ld", get_sock_num(sock));
|
|
|
|
if (sock->recv_head) {
|
|
/* data available receive immeditely */
|
|
|
|
struct udp_recv_data * data;
|
|
int ret;
|
|
|
|
data = (struct udp_recv_data *) sock->recv_head->data;
|
|
|
|
ret = udp_do_receive(sock, m, (struct udp_pcb *) sock->pcb,
|
|
data->pbuf, &data->ip, data->port);
|
|
|
|
if (ret > 0) {
|
|
sock_dequeue_data(sock);
|
|
sock->recv_data_size -= data->pbuf->tot_len;
|
|
udp_recv_free(data);
|
|
}
|
|
sock_reply(sock, ret);
|
|
} else if (!blk)
|
|
sock_reply(sock, EAGAIN);
|
|
else {
|
|
/* store the message so we know how to reply */
|
|
sock->mess = *m;
|
|
/* operation is being processes */
|
|
sock->flags |= SOCK_FLG_OP_PENDING;
|
|
|
|
debug_udp_print("no data to read, suspending\n");
|
|
}
|
|
}
|
|
|
|
static int udp_op_send(struct socket * sock,
|
|
struct pbuf * pbuf,
|
|
message * m)
|
|
{
|
|
int err;
|
|
|
|
debug_udp_print("pbuf len %d\n", pbuf->len);
|
|
|
|
if ((err = udp_send(sock->pcb, pbuf)) == ERR_OK)
|
|
return m->COUNT;
|
|
else {
|
|
debug_udp_print("udp_send failed %d", err);
|
|
return EIO;
|
|
}
|
|
}
|
|
|
|
static int udp_op_sendto(struct socket * sock, struct pbuf * pbuf, message * m)
|
|
{
|
|
int err;
|
|
udp_io_hdr_t hdr;
|
|
|
|
hdr = *(udp_io_hdr_t *) pbuf->payload;
|
|
|
|
pbuf_header(pbuf, -(s16_t)sizeof(udp_io_hdr_t));
|
|
|
|
debug_udp_print("data len %d pbuf len %d\n",
|
|
hdr.uih_data_len, pbuf->len);
|
|
|
|
if ((err = udp_sendto(sock->pcb, pbuf, (ip_addr_t *) &hdr.uih_dst_addr,
|
|
ntohs(hdr.uih_dst_port))) == ERR_OK)
|
|
return m->COUNT;
|
|
else {
|
|
debug_udp_print("udp_sendto failed %d", err);
|
|
return EIO;
|
|
}
|
|
}
|
|
|
|
static void udp_op_write(struct socket * sock, message * m, __unused int blk)
|
|
{
|
|
int ret;
|
|
struct pbuf * pbuf;
|
|
|
|
debug_udp_print("socket num %ld data size %d",
|
|
get_sock_num(sock), m->COUNT);
|
|
|
|
pbuf = pbuf_alloc(PBUF_TRANSPORT, m->COUNT, PBUF_POOL);
|
|
if (!pbuf) {
|
|
ret = ENOMEM;
|
|
goto write_err;
|
|
}
|
|
|
|
if ((ret = copy_from_user(m->m_source, pbuf->payload, m->COUNT,
|
|
(cp_grant_id_t) m->IO_GRANT, 0)) != OK) {
|
|
pbuf_free(pbuf);
|
|
goto write_err;
|
|
}
|
|
|
|
if (sock->usr_flags & NWUO_RWDATONLY)
|
|
ret = udp_op_send(sock, pbuf, m);
|
|
else
|
|
ret = udp_op_sendto(sock, pbuf, m);
|
|
|
|
if (pbuf_free(pbuf) == 0) {
|
|
panic("We cannot buffer udp packets yet!");
|
|
}
|
|
|
|
write_err:
|
|
sock_reply(sock, ret);
|
|
}
|
|
|
|
static void udp_set_opt(struct socket * sock, message * m)
|
|
{
|
|
int err;
|
|
nwio_udpopt_t udpopt;
|
|
struct udp_pcb * pcb = (struct udp_pcb *) sock->pcb;
|
|
ip_addr_t loc_ip = ip_addr_any;
|
|
|
|
assert(pcb);
|
|
|
|
err = copy_from_user(m->m_source, &udpopt, sizeof(udpopt),
|
|
(cp_grant_id_t) m->IO_GRANT, 0);
|
|
|
|
if (err != OK)
|
|
sock_reply(sock, err);
|
|
|
|
debug_udp_print("udpopt.nwuo_flags = 0x%lx", udpopt.nwuo_flags);
|
|
debug_udp_print("udpopt.nwuo_remaddr = 0x%x",
|
|
(unsigned int) udpopt.nwuo_remaddr);
|
|
debug_udp_print("udpopt.nwuo_remport = 0x%x",
|
|
ntohs(udpopt.nwuo_remport));
|
|
debug_udp_print("udpopt.nwuo_locaddr = 0x%x",
|
|
(unsigned int) udpopt.nwuo_locaddr);
|
|
debug_udp_print("udpopt.nwuo_locport = 0x%x",
|
|
ntohs(udpopt.nwuo_locport));
|
|
|
|
sock->usr_flags = udpopt.nwuo_flags;
|
|
|
|
/*
|
|
* We will only get data from userspace and the remote address
|
|
* and port are being set which means that from now on we must
|
|
* know where to send data. Thus we should interpret this as
|
|
* connect() call
|
|
*/
|
|
if (sock->usr_flags & NWUO_RWDATONLY &&
|
|
sock->usr_flags & NWUO_RP_SET &&
|
|
sock->usr_flags & NWUO_RA_SET)
|
|
udp_connect(pcb, (ip_addr_t *) &udpopt.nwuo_remaddr,
|
|
ntohs(udpopt.nwuo_remport));
|
|
/* Setting local address means binding */
|
|
if (sock->usr_flags & NWUO_LP_SET)
|
|
udp_bind(pcb, &loc_ip, ntohs(udpopt.nwuo_locport));
|
|
/* We can only bind to random local port */
|
|
if (sock->usr_flags & NWUO_LP_SEL)
|
|
udp_bind(pcb, &loc_ip, 0);
|
|
|
|
|
|
/* register a receive hook */
|
|
udp_recv((struct udp_pcb *) sock->pcb, udp_recv_callback, sock);
|
|
|
|
sock_reply(sock, OK);
|
|
}
|
|
|
|
static void udp_get_opt(struct socket * sock, message * m)
|
|
{
|
|
int err;
|
|
nwio_udpopt_t udpopt;
|
|
struct udp_pcb * pcb = (struct udp_pcb *) sock->pcb;
|
|
|
|
assert(pcb);
|
|
|
|
udpopt.nwuo_locaddr = pcb->local_ip.addr;
|
|
udpopt.nwuo_locport = htons(pcb->local_port);
|
|
udpopt.nwuo_remaddr = pcb->remote_ip.addr;
|
|
udpopt.nwuo_remport = htons(pcb->remote_port);
|
|
udpopt.nwuo_flags = sock->usr_flags;
|
|
|
|
debug_udp_print("udpopt.nwuo_flags = 0x%lx", udpopt.nwuo_flags);
|
|
debug_udp_print("udpopt.nwuo_remaddr = 0x%x",
|
|
(unsigned int) udpopt.nwuo_remaddr);
|
|
debug_udp_print("udpopt.nwuo_remport = 0x%x",
|
|
ntohs(udpopt.nwuo_remport));
|
|
debug_udp_print("udpopt.nwuo_locaddr = 0x%x",
|
|
(unsigned int) udpopt.nwuo_locaddr);
|
|
debug_udp_print("udpopt.nwuo_locport = 0x%x",
|
|
ntohs(udpopt.nwuo_locport));
|
|
|
|
if ((unsigned) m->COUNT < sizeof(udpopt)) {
|
|
sock_reply(sock, EINVAL);
|
|
return;
|
|
}
|
|
|
|
err = copy_to_user(m->m_source, &udpopt, sizeof(udpopt),
|
|
(cp_grant_id_t) m->IO_GRANT, 0);
|
|
|
|
if (err != OK)
|
|
sock_reply(sock, err);
|
|
|
|
sock_reply(sock, OK);
|
|
}
|
|
|
|
static void udp_op_ioctl(struct socket * sock, message * m, __unused int blk)
|
|
{
|
|
debug_udp_print("socket num %ld req %c %d %d",
|
|
get_sock_num(sock),
|
|
(m->REQUEST >> 8) & 0xff,
|
|
m->REQUEST & 0xff,
|
|
(m->REQUEST >> 16) & _IOCPARM_MASK);
|
|
|
|
switch (m->REQUEST) {
|
|
case NWIOSUDPOPT:
|
|
udp_set_opt(sock, m);
|
|
break;
|
|
case NWIOGUDPOPT:
|
|
udp_get_opt(sock, m);
|
|
break;
|
|
default:
|
|
sock_reply(sock, EBADIOCTL);
|
|
return;
|
|
}
|
|
}
|
|
|
|
struct sock_ops sock_udp_ops = {
|
|
.open = udp_op_open,
|
|
.close = udp_op_close,
|
|
.read = udp_op_read,
|
|
.write = udp_op_write,
|
|
.ioctl = udp_op_ioctl,
|
|
.select = generic_op_select,
|
|
.select_reply = generic_op_select_reply
|
|
};
|
|
|