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//#include "internal.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include <sys/fcntl.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <ifaddrs.h>
#include <sys/types.h>
#include <netdb.h>
#include <osmocom/core/select.h>
#include <osmocom/gsm/tlv.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/talloc.h>
//#include <osmocom/abis/e1_input.h>
//#include <osmocom/abis/ipaccess.h>
//#include <osmocom/core/socket.h>
#include <osmocom/core/backtrace.h>
#include <openbsc/tcp_client.h>
void tcp_client_conn_close(struct tcp_client_conn *link)
{
/* be safe against multiple calls */
if (link->ofd->fd != -1) {
osmo_fd_unregister(link->ofd);
close(link->ofd->fd);
link->ofd->fd = -1;
}
msgb_free(link->pending_msg);
link->pending_msg = NULL;
}
static void tcp_client_read(struct tcp_client_conn *link)
{
struct osmo_fd *ofd = link->ofd;
struct msgb *msg;
int ret;
LOGP(DLINP, LOGL_DEBUG, "message received\n");
// FIX 1500
msg = msgb_alloc(1500, "TCP");
if (!msg)
return;
printf("try to recv data msg->data = %d msg->data_len = %d \n", msg->data, msg->data_len);
ret = recv(ofd->fd, msg->data, msg->data_len, 0);
if (ret < 0) {
if (ret == -EAGAIN)
return;
if (ret == -EPIPE || ret == -ECONNRESET)
LOGP(DLINP, LOGL_ERROR, "lost connection with server\n");
tcp_client_conn_close(link);
if (link->updown_cb)
link->updown_cb(link, 0);
return;
} else if (ret == 0) {
LOGP(DLINP, LOGL_ERROR, "connection closed with server\n");
tcp_client_conn_close(link);
if (link->updown_cb)
link->updown_cb(link, 0);
return;
}
// TODO set len = ret
msg->data_len = ret;
printf("RECV SIP LEN = %d \n", ret);
if (link->read_cb)
link->read_cb(link, msg);
}
static void tcp_client_write(struct tcp_client_conn *link)
{
if (link->write_cb)
link->write_cb(link);
}
static int tcp_client_write_default_cb(struct tcp_client_conn *link)
{
struct osmo_fd *ofd = link->ofd;
struct msgb *msg;
struct llist_head *lh;
int ret;
LOGP(DLINP, LOGL_DEBUG, "sending data\n");
if (llist_empty(&link->tx_queue)) {
ofd->when &= ~BSC_FD_WRITE;
return 0;
}
lh = link->tx_queue.next;
llist_del(lh);
msg = llist_entry(lh, struct msgb, list);
ret = send(link->ofd->fd, msg->data, msg->len, 0);
if (ret < 0) {
if (errno == EPIPE || errno == ENOTCONN) {
tcp_client_conn_close(link);
if (link->updown_cb)
link->updown_cb(link, 0);
}
LOGP(DLINP, LOGL_ERROR, "error to send\n");
}
msgb_free(msg);
return 0;
}
static int tcp_client_fd_cb(struct osmo_fd *ofd, unsigned int what)
{
struct tcp_client_conn *link = ofd->data;
int error, ret;
socklen_t len = sizeof(error);
switch(link->state) {
case TCP_CLIENT_LINK_STATE_CONNECTING:
ret = getsockopt(ofd->fd, SOL_SOCKET, SO_ERROR, &error, &len);
if (ret >= 0 && error > 0) {
tcp_client_conn_close(link);
if (link->updown_cb)
link->updown_cb(link, 0);
return 0;
}
ofd->when &= ~BSC_FD_WRITE;
LOGP(DLINP, LOGL_NOTICE, "connection done.\n");
link->state = TCP_CLIENT_LINK_STATE_CONNECTED;
if (link->updown_cb)
link->updown_cb(link, 1);
break;
case TCP_CLIENT_LINK_STATE_CONNECTED:
if (what & BSC_FD_READ) {
LOGP(DLINP, LOGL_DEBUG, "connected read\n");
tcp_client_read(link);
}
if (what & BSC_FD_WRITE) {
LOGP(DLINP, LOGL_DEBUG, "connected write\n");
tcp_client_write(link);
}
break;
default:
break;
}
return 0;
}
struct tcp_client_conn * tcp_client_conn_create(void *ctx, int priv_nr,
const char *dst_addr, uint16_t dst_port,
const char *src_addr, uint16_t src_port,
void (*updown_cb)(struct tcp_client_conn *link, int up),
int (*read_cb)(struct tcp_client_conn *link,
struct msgb *msgb),
int (*write_cb)(struct tcp_client_conn *link),
void *data)
{
struct tcp_client_conn *tcp_link;
tcp_link = talloc_zero(ctx, struct tcp_client_conn);
if (!tcp_link)
return NULL;
tcp_link->ofd = talloc_zero(ctx, struct osmo_fd);
if (tcp_link->ofd == NULL) {
talloc_free(tcp_link);
return NULL;
}
tcp_link->ofd->when |= BSC_FD_READ | BSC_FD_WRITE;
tcp_link->ofd->priv_nr = priv_nr;
tcp_link->ofd->cb = tcp_client_fd_cb;
tcp_link->ofd->data = tcp_link;
tcp_link->ofd->fd = -1;
tcp_link->state = TCP_CLIENT_LINK_STATE_CONNECTING;
tcp_link->src_addr = talloc_strdup(tcp_link, src_addr);
tcp_link->src_port = src_port;
tcp_link->dst_addr = talloc_strdup(tcp_link, dst_addr);
tcp_link->dst_port = dst_port;
tcp_link->updown_cb = updown_cb;
tcp_link->read_cb = read_cb;
/* default to generic write callback if not set. */
if (write_cb == NULL)
tcp_link->write_cb = tcp_client_write_default_cb;
else
tcp_link->write_cb = write_cb;
tcp_link->data = data;
INIT_LLIST_HEAD(&tcp_link->tx_queue);
return tcp_link;
}
void tcp_client_conn_destroy(struct tcp_client_conn *link)
{
talloc_free(link);
}
int tcp_client_conn_open(struct tcp_client_conn *link)
{
int ret;
struct addrinfo hints, *bind_addr, *connect_addr;
int sfd, rc, on = 1;
char src_port_buf[16];
char dst_port_buf[16];
link->state = TCP_CLIENT_LINK_STATE_CONNECTING;
// ret = osmo_sock_init(AF_INET, SOCK_STREAM, IPPROTO_TCP,
// link->addr, link->port,
// OSMO_SOCK_F_CONNECT|OSMO_SOCK_F_NONBLOCK);
sprintf(src_port_buf, "%u", link->src_port);
sprintf(dst_port_buf, "%u", link->dst_port);
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
rc = getaddrinfo(link->dst_addr, dst_port_buf, &hints, &connect_addr);
if (rc != 0) {
perror("getaddrinfo returned NULL");
return -EINVAL;
}
hints.ai_flags |= AI_PASSIVE;
rc = getaddrinfo(link->src_addr, src_port_buf, &hints, &bind_addr);
if (rc != 0) {
perror("getaddrinfo returned NULL");
return -EINVAL;
}
sfd = socket(connect_addr->ai_family, connect_addr->ai_socktype, connect_addr->ai_protocol);
if (sfd < 0) {
perror("cannot create socket");
return sfd;
}
if (ioctl(sfd, FIONBIO, (unsigned char *)&on) < 0) {
perror("cannot set this socket unblocking");
close(sfd);
return -EINVAL;
}
rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
if (rc < 0) {
perror("cannot setsockopt socket");
close(sfd);
return -EINVAL;
}
rc = bind(sfd, bind_addr->ai_addr, bind_addr->ai_addrlen);
if (rc < 0) {
perror("cannot bind socket");
close(sfd);
return -ENODEV;
}
rc = connect(sfd, connect_addr->ai_addr, connect_addr->ai_addrlen);
if (rc <0 && errno != EINPROGRESS) {
perror("cannot connect socket");
close(sfd);
return -ENODEV;
}
freeaddrinfo(bind_addr);
freeaddrinfo(connect_addr);
listen(sfd, 10);
link->ofd->fd = sfd;
link->ofd->when |= BSC_FD_WRITE;
if (osmo_fd_register(link->ofd) < 0) {
close(sfd);
link->ofd->fd = -1;
return -EIO;
}
return 0;
}
void tcp_client_conn_send(struct tcp_client_conn *link, struct msgb *msg)
{
msgb_enqueue(&link->tx_queue, msg);
link->ofd->when |= BSC_FD_WRITE;
}
size_t tcp_client_conn_clear_queue(struct tcp_client_conn *link)
{
size_t deleted = 0;
while (!llist_empty(&link->tx_queue)) {
struct msgb *msg = msgb_dequeue(&link->tx_queue);
msgb_free(msg);
deleted += 1;
}
link->ofd->when &= ~BSC_FD_WRITE;
return deleted;
}
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