/*
*===========================================================================
* ipcom_drv_ppp_output
*===========================================================================
* Description: Outputs an IP packet on PPP.
* Parameters: netif - The network interface to use when sending the frame.
* pkt - The frame send. pkt->start is the offset to the
* PPP frame header.
* Returns: 0 = success, <0 = error code.
*
*/
IP_STATIC int
ipcom_drv_ppp_output(Ipcom_netif *netif, Ipcom_pkt *pkt)
{
Ipcom_pdrv_ppp *pdrv;
Ipcom_drv_ppp_link *plink;
Ipcom_drv_ppp_ipc *ipcbuf;
Ip_err retval;
ip_assert(pkt->link_cookie == 0);
pdrv = (Ipcom_pdrv_ppp *)netif->pdrv;
plink = &pdrv->plink[pkt->link_cookie];
/* Check if output queue full. */
if (plink->out_q_nr > 8)
return -IP_ERRNO_EWOULDBLOCK;
/* Create IPC buf */
ipcbuf = ipcom_ipc_malloc(sizeof(Ipcom_drv_ppp_ipc));
if (ipcbuf == IP_NULL)
goto fail;
ipcbuf->netif = netif;
ipcbuf->pkt = pkt;
/* Send IPC buf */
retval = ipcom_ipc_send(&plink->out_ipc, ipcbuf);
if (retval != IPCOM_SUCCESS)
{
ipcom_ipc_free(ipcbuf);
goto fail;
}
plink->out_q_nr++;
return 0;
fail:
ipcom_pkt_free(pkt);
return -IP_ERRNO_ENOBUFS;
}
/*
*===========================================================================
* ipcom_shell_run_extcmd
*===========================================================================
* Description: Starts a shell command process and delivers the command arguments
* and stdio socket to that process.
* Parameters: argc, argv - traditional command arguments
* stdio_fd - the standard input, output and error sock
* ppid - parent pid
* cmd_pid - shell command process id
*
* Returns: 1 : command process started
* 0 : not an external command
* -1 : error
*
*/
IP_PUBLIC Ip_err
ipcom_shell_run_extcmd(int argc, char **argv, Ip_fd *stdio_fd, Ip_pid_t ppid, Ip_u32 seqno, Ip_pid_t *cmd_pid, int *proc_index)
{
Ipcom_proc_attr attr;
Ipcom_ipc ipc;
Ipcom_shellcmd_info *sinfo;
Ipcom_shell_cmd *cmd = IP_NULL;
Ipcom_shell_cmd *tcmd;
Ip_err retval;
char procname[40];
Ip_u32 stack = IPCOM_PROC_STACK_DEFAULT;
Ip_pid_t pid;
pid = ipcom_getpid();
ipcom_sprintf(procname, "ipcom_sc_0x%lx_%d", (Ip_u32)pid, *proc_index);
/* Find command and max stack size (since we are reusing the process). */
if (argc > 0)
{
for (tcmd = IPCOM_LIST_FIRST(&ipcom_shell_cmd_head); tcmd; tcmd = IPCOM_LIST_NEXT(&tcmd->cmd_list))
{
stack = (Ip_u32)IP_MAX(stack, tcmd->stack_size);
if (cmd == IP_NULL && ipcom_strcmp(tcmd->name, argv[0]) == 0)
{
cmd = tcmd;
if (*cmd_pid != 0)
break;
}
}
if (cmd == IP_NULL)
return 0;
/* Start the shell_cmd process. */
if (*cmd_pid == 0)
{
ipcom_proc_attr_init(&attr);
attr.priority = (Ip_u32)cmd->priority;
attr.stacksize = stack;
attr.flags |= IPCOM_PROC_FLAG_FP;
if (ipcom_proc_acreate(procname, (Ipcom_proc_func)ipcom_shell_cmd, &attr, cmd_pid))
{
IPCOM_LOG0(ERR, "ipcom_shell_run_extcmd :: ipcom_proc_acreate() failed");
goto fail;
}
ip_assert(*cmd_pid != 0);
}
}
else
{
/* argc == 0 is used to kill the shell_cmd process. */
ip_assert(*cmd_pid != 0);
}
/* Open IPC with ipcom_shell. */
retval = ipcom_ipc_open(&ipc, procname, -1);
if (retval != IPCOM_SUCCESS)
{
IPCOM_LOG2(ERR, "ipcom_shell_run_extcmd :: ipcom_ipc_open(%s) failed, ret = %d", procname, retval);
goto fail;
}
/* Send a message to ipcom_shell. */
sinfo = ipcom_ipc_malloc(sizeof(Ipcom_shellcmd_info));
if (sinfo == IP_NULL)
{
IPCOM_LOG1(ERR, "ipcom_shell_run_extcmd :: ipcom_ipc_malloc() failed, ret = %d", retval);
goto fail;
}
/* Fill in IPC info. */
sinfo->argc = argc;
if (argc > 0)
{
sinfo->hook = cmd->hook;
sinfo->argv = argv;
sinfo->fd = *stdio_fd;
sinfo->pid = pid;
sinfo->ppid = ppid;
sinfo->seqno = seqno;
#if IPCOM_USE_FILE != IPCOM_FILE_NONE
if (ipcom_getcwd(sinfo->cwd, sizeof(sinfo->cwd)) == IP_NULL)
ipcom_memset(sinfo->cwd, 0, sizeof(sinfo->cwd));
else
sinfo->cwd[sizeof(sinfo->cwd)-1] = '\0';
#endif
sinfo->prio = cmd->priority;
}
/* Send the IPC info. */
retval = ipcom_ipc_send(&ipc, sinfo);
if (retval != IPCOM_SUCCESS)
{
IPCOM_LOG1(ERR, "ipcom_shell_run_extcmd :: ipcom_ipc_send() failed, ret = %d", retval);
ipcom_ipc_free(sinfo);
goto fail;
}
(void)ipcom_ipc_close(&ipc);
#ifdef IP_PORT_OSE5
if (argc > 0)
{
/* OSE5 has process specific sockets -> donate child fd */
ip_assert(*cmd_pid != 0);
retval = (Ip_err)efs_donate_fd(*stdio_fd, *cmd_pid);
if (retval != 0)
{
IPCOM_LOG1(ERR, "ipcom_shell_run_extcmd :: efs_donate_fd, ret = %d", retval);
goto fail;
}
}
#endif /* IP_PORT_OSE5 */
/* Wait for exit message from shell_cmd process. */
retval = ipcom_ipc_receive(IP_NULL, &sinfo, -1);
if (retval != IPCOM_SUCCESS)
{
IPCOM_LOG1(ERR, "ipcom_shell_run_extcmd :: ipcom_ipc_receive(shell_cmd) failed, ret = %d", retval);
goto fail;
}
ip_assert(argc > 0 || *(Ip_u32 *)sinfo == 1);
if (*(Ip_u32 *)sinfo == 1)
{
*cmd_pid = 0; /* shell command called ipcom_exit(). */
(*proc_index)++;
}
else
{
#ifdef IP_PORT_OSE5
*stdio_fd = efs_receive_fd(0);
if (*stdio_fd == -1)
{
IP_PANIC();
goto fail;
}
#endif
#if defined(IP_PORT_OSE) || defined(IP_PORT_OSE5)
/* Change child socket owner (A must for OSE to work due to poor ipcom_block impl). */
pid = ipcom_getpid();
if (ipcom_socketioctl(*stdio_fd, IP_SIOCSPGRP, &pid) < 0)
{
IP_PANIC2();
IPCOM_LOG1(WARNING, "ipcom_shell_run_extcmd :: ipcom_socketioctl(IP_SIOCSPGRP) failed, errno = %d", ipcom_errno);
}
#endif
}
ipcom_ipc_free(sinfo);
return 1;
fail:
if (ipcom_ipc_isopen(&ipc))
(void)ipcom_ipc_close(&ipc);
return -1;
}
/*
*===========================================================================
* ipcom_start_shell
*===========================================================================
* Description: Starts a shell process and sets up a TCP connection. The
* TCP connection is used to convey stdin and stdout data. The
* stdio proxy process and the underlaying shell process is
* terminated by closing the socket. If the shell terminates
* (e.g. if the user gives the command 'exit') the stdio proxy
* will close the TCP connection and terminate.
* Parameters:
* Returns:
*
*/
IP_PUBLIC Ip_err
ipcom_start_shell(Ip_fd *stdio_sock, Ip_fd client_fd)
{
Ip_fd mother = IP_INVALID_SOCKET;
Ip_fd shell_fd = IP_INVALID_SOCKET;
Ip_socklen_t addr_len;
Ipcom_ipc ipc;
Ipcom_shell_info *sinfo;
char procname[40];
Ip_err retval;
Ipcom_proc_attr attr;
Ip_bool ipc_opened = IP_FALSE;
Ip_pid_t ppid, shell_pid;
Ip_u16 mother_port;
static Ip_u32 seqno = 0;
struct Ip_addrinfo hints;
struct Ip_addrinfo *res = IP_NULL;
union Ip_sockaddr_union sa;
*stdio_sock = IP_INVALID_SOCKET;
sinfo = ipcom_ipc_malloc(sizeof(Ipcom_shell_info));
if (sinfo == IP_NULL)
{
IPCOM_LOG0(ERR, "ipcom_start_shell :: ipcom_ipc_malloc() failed");
goto exit;
}
addr_len = sizeof(sinfo->sa_prompt);
if (ipcom_getsockname(client_fd, (struct Ip_sockaddr *)&sinfo->sa_prompt, &addr_len) == IP_SOCKERR)
{
IPCOM_LOG1(ERR, "ipcom_start_shell :: ipcom_getsockname(client_fd) failed, errno = %d", ipcom_errno);
goto exit;
}
/* Get a tcp socket and let the stack pick a port */
ipcom_memset(&hints, 0, sizeof(hints));
hints.ai_family = sinfo->sa_prompt.sa.sa_family;
hints.ai_socktype = IP_SOCK_STREAM;
if (ipcom_getaddrinfo(IP_NULL, "0", &hints, &res) != 0)
{
IPCOM_LOG1(ERR, "ipcom_start_shell :: ipcom_getsockname(client_fd) failed, errno = %d", ipcom_errno);
goto exit;
}
mother = ipcom_socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (mother == IP_INVALID_SOCKET)
{
IPCOM_LOG1(ERR, "ipcom_start_shell :: ipcom_socket(IP_AF_INET) failed, errno = %d", ipcom_errno);
goto exit;
}
if (ipcom_bind(mother, res->ai_addr, res->ai_addrlen) == IP_SOCKERR)
{
IPCOM_LOG1(ERR, "ipcom_start_shell :: ipcom_bind(IP_AF_INET) failed, errno = %d", ipcom_errno);
goto exit;
}
/* Find out which port was assigned. */
addr_len = sizeof(sa);
if (ipcom_getsockname(mother, (struct Ip_sockaddr *)&sa, &addr_len) == IP_SOCKERR)
{
IPCOM_LOG1(ERR, "ipcom_start_shell :: ipcom_getsockname(IP_AF_INET) failed, errno = %d", ipcom_errno);
goto exit;
}
mother_port = ip_ntohs(sa.sin.sin_port);
if (ipcom_listen(mother, 1) == IP_SOCKERR)
{
IPCOM_LOG1(ERR, "ipcom_start_shell :: ipcom_listen() failed, errno = %d", ipcom_errno);
goto exit;
}
/* Create and start the shell process. */
ipcom_proc_attr_init(&attr);
#ifdef IP_PORT_VXWORKS
attr.stacksize = IPCOM_PROC_STACK_LARGE;
#else
attr.priority = IPCOM_PRIORITY_DEFAULT;
#endif /* IP_PORT_VXWORKS */
ppid = ipcom_getpid();
ipcom_sprintf(procname, "ipcom_shell_%lx_%lx", (Ip_u32)ppid, ++seqno);
if (ipcom_proc_acreate(procname, (Ipcom_proc_func)ipcom_shell, &attr, &shell_pid))
{
IPCOM_LOG0(ERR, "ipcom_start_shell :: ipcom_proc_acreate() failed");
goto exit;
}
/* Open IPC with ipcom_shell. */
retval = ipcom_ipc_open(&ipc, procname, -1);
if (retval != IPCOM_SUCCESS)
{
IPCOM_LOG2(ERR, "ipcom_start_shell :: ipcom_ipc_open(%s) failed, ret = %d", procname, retval);
goto exit;
}
ipc_opened = IP_TRUE;
/* Send a message to ipcom_shell. */
sinfo->port = mother_port;
sinfo->ppid = ppid;
sinfo->seqno = seqno;
retval = ipcom_ipc_send(&ipc, sinfo);
if (retval != IPCOM_SUCCESS)
{
IPCOM_LOG1(ERR, "ipcom_start_shell :: ipcom_ipc_send() failed, ret = %d", retval);
goto exit;
}
/* Wait for the shell process to connect */
shell_fd = ipcom_accept(mother, IP_NULL, IP_NULL);
exit:
if (mother != IP_INVALID_SOCKET)
(void)ipcom_socketclose(mother);
if (res != IP_NULL)
ipcom_freeaddrinfo(res);
if (ipc_opened)
(void)ipcom_ipc_close(&ipc);
else if (sinfo != IP_NULL)
ipcom_ipc_free(sinfo);
if (shell_fd == IP_INVALID_SOCKET)
return IPCOM_ERR_FAILED;
else
{
int enable = IP_TRUE;
*stdio_sock = shell_fd;
/* Disable Nagle (enable no delay) on this socket since it is an
interactive connection */
(void)ipcom_setsockopt(shell_fd, IP_IPPROTO_TCP, IP_TCP_NODELAY, &enable, sizeof(enable));
return IPCOM_SUCCESS;
}
}
