cmd/lms/ProtocolCompat.cpp

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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#if defined(__sun) || defined(_LINUX)
#include <arpa/inet.h>
#include <netinet/in.h>
#else
#include <winsock2.h>
#endif  // __sun || _LINUX

#include <cerrno>
#include "Protocol.h"
#include "LMS_if_compat.h"
#include "Lock.h"
#include "ATNetworkTool.h"

void Protocol::_LmeReceiveCompat(char *buffer, unsigned int len, int *status)
{
    int error = 0;

    PRINT("[Compat]HECI receive %d bytes (msg type 0x%02x)\n", len, buffer[0]);
    *status = 0;

    switch (buffer[0]) {
    case LMS_MESSAGE_TYPE_OPEN_CONNECTION_EX:
        {
            SOCKET s_new = INVALID_SOCKET;
            LMS_OPEN_CONNECTION_EX_MESSAGE *msg =
                (LMS_OPEN_CONNECTION_EX_MESSAGE *)buffer;

            int type;
            switch (msg->Protocol) {
            case LMS_PROTOCOL_TYPE_UDP_IPV4:
                type = SOCK_DGRAM;
                break;
            case LMS_PROTOCOL_TYPE_TCP_IPV4:
            default:
                type = SOCK_STREAM;
                break;
            }

            if ((msg->Flags & HOSTNAME_BIT) != 0) {
                PRINT("[Compat]Got client connection request %d for host %s, port %d\n",
                    msg->ConnectionId,
                    msg->Host,
                    ntohs(msg->HostPort));

                s_new = ATNetworkTool::Connect(
                    (const char *)msg->Host,
                    ntohs(msg->HostPort),
                    error, PF_INET, type);
            } else {
                PRINT("[Compat]Got client connection request %d for IP %s, port %d\n",
                    msg->ConnectionId,
                    inet_ntoa(*((struct in_addr *)msg->Host)),
                    ntohs(msg->HostPort));

                s_new = ATNetworkTool::Connect(
                    inet_ntoa(*((struct in_addr *)msg->Host)),
                    ntohs(msg->HostPort),
                    error, PF_INET, type);
            }

            if (s_new == INVALID_SOCKET) {
                *status = 1;
                break;
            }

            Channel *c = new Channel(NULL, s_new);
            c->SetRecipientChannel(msg->ConnectionId);
            c->SetStatus(Channel::OPEN);
            c->AddBytesTxWindow(1024);
            {
                Lock l(_channelsLock);
                _openChannels[msg->ConnectionId] = c;
            }

            _signalSelect();
        }
        break;

    case LMS_MESSAGE_TYPE_CLOSE_CONNECTION:
        {
            LMS_CLOSE_CONNECTION_MESSAGE *msg =
                (LMS_CLOSE_CONNECTION_MESSAGE *)buffer;

            PRINT("[Compat]received close connection msg from HECI for connection %d\n", msg->ConnectionId);

            Lock l(_channelsLock);

            ChannelMap::iterator it = _openChannels.find(msg->ConnectionId);
            if (it != _openChannels.end()) {
                _closeMChannel(it->second);
                _openChannels.erase(it);
            }
        }
        break;

    case LMS_MESSAGE_TYPE_SEND_DATA:
        {
            LMS_SEND_DATA_MESSAGE *msg =
                (LMS_SEND_DATA_MESSAGE *)buffer;

            Lock l(_channelsLock);

            ChannelMap::iterator it = _openChannels.find(msg->ConnectionId);
            if (it != _openChannels.end()) {
                PRINT("[Compat]sending %d bytes from HECI connection %d to socket %d\n", ntohs(msg->DataLength), msg->ConnectionId, it->second->GetSocket());
                if (-1 == _send(it->second->GetSocket(), (char *)msg->Data, ntohs(msg->DataLength), error)) {
                    if (EPIPE == error) {
                        _closeMChannel(it->second);
                        _openChannels.erase(it);
                        *status = 1;
                    }
                }
            }
        }
        break;

    case LMS_MESSAGE_TYPE_IP_FQDN:
        if (_updateIPFQDN((const char *)((LMS_IP_FQDN_MESSAGE *)buffer)->FQDN) != 0) {
            ERROR("[Compat]Error: failed to update IP/FQDN info\n");
        }
        break;

    default:
        *status = 1;
        break;
    }
}