lpac/driver/apdu/qmi_qrtr.c

// SPDX-License-Identifier: MIT
/*
 * Copyright (c) 2024, Luca Weiss <luca.weiss@fairphone.com>
 */
#include "qmi_qrtr.h"
#include "qmi_common.h"

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

#include <libqrtr-glib.h>
#include <helpers.h>
#include <euicc/interface.h>

static QrtrBus *bus = NULL;

static int apdu_interface_connect(struct euicc_ctx *ctx)
{
    struct qmi_data *qmi_priv = ctx->apdu.interface->userdata;
    g_autoptr(GError) error = NULL;
    QrtrNode *node = NULL;
    QmiDevice *device = NULL;
    QmiClient *client = NULL;
    bool found = false;

    qmi_priv->context = g_main_context_new();

    bus = qrtr_bus_new_sync(qmi_priv->context, &error);
    if (bus == NULL)
    {
        fprintf(stderr, "error: connect to QRTR bus failed: %s\n", error->message);
        return -1;
    }

    /* Find QRTR node for UIM service */
    for (GList *l = qrtr_bus_peek_nodes(bus); l != NULL; l = l->next)
    {
        node = l->data;

        if (node && qrtr_node_lookup_port(node, QMI_SERVICE_UIM) >= 0)
        {
            found = true;
            break;
        }
    }

    if (!found)
    {
        fprintf(stderr, "error: find QRTR node with UIM service failed\n");
        return -1;
    }

    device = qmi_device_new_from_node_sync(node, qmi_priv->context, &error);
    if (!device)
    {
        fprintf(stderr, "error: create QMI device from QRTR node failed: %s\n", error->message);
        return -1;
    }

    qmi_device_open_sync(device, QMI_DEVICE_OPEN_FLAGS_NONE, qmi_priv->context, &error);
    if (error)
    {
        fprintf(stderr, "error: open QMI device failed: %s\n", error->message);
        return -1;
    }

    client = qmi_device_allocate_client_sync(device, qmi_priv->context, &error);
    if (!client)
    {
        fprintf(stderr, "error: allocate QMI client failed: %s\n", error->message);
        return -1;
    }

    qmi_priv->uimClient = QMI_CLIENT_UIM(client);

    return 0;
}

static int libapduinterface_init(struct euicc_apdu_interface *ifstruct)
{
    set_deprecated_env_name(ENV_UIM_SLOT, "UIM_SLOT");

    struct qmi_data *qmi_priv;

    qmi_priv = malloc(sizeof(struct qmi_data));
    if(!qmi_priv) {
        fprintf(stderr, "Failed allocating memory\n");
        return -1;
    }

    memset(ifstruct, 0, sizeof(struct euicc_apdu_interface));

    ifstruct->connect = apdu_interface_connect;
    ifstruct->disconnect = qmi_apdu_interface_disconnect;
    ifstruct->logic_channel_open = qmi_apdu_interface_logic_channel_open;
    ifstruct->logic_channel_close = qmi_apdu_interface_logic_channel_close;
    ifstruct->transmit = qmi_apdu_interface_transmit;

    /*
     * Allow the user to select the SIM card slot via environment variable.
     * Use the primary SIM slot if not set.
     */
    qmi_priv->uimSlot = getenv_or_default(ENV_UIM_SLOT, (int) 1);

    ifstruct->userdata = qmi_priv;

    return 0;
}

static int libapduinterface_main(int argc, char **argv)
{
    return 0;
}

static void libapduinterface_fini(struct euicc_apdu_interface *ifstruct)
{
    struct qmi_data *qmi_priv = ifstruct->userdata;

    qmi_cleanup(qmi_priv);

    free(qmi_priv);
}

const struct euicc_driver driver_apdu_qmi_qrtr = {
    .type = DRIVER_APDU,
    .name = "qmi_qrtr",
    .init = (int (*)(void *))libapduinterface_init,
    .main = libapduinterface_main,
    .fini = (void (*)(void *))libapduinterface_fini,
};