hackedteam/core-android-native

#include <stdlib.h>
#include <string.h>

#include "iface_internal.h"
#include "context_internal.h"
#include "debug.h"
#include "log.h"

struct sepol_iface {

    /* Interface name */
    char *name;

    /* Interface context */
    sepol_context_t *netif_con;

    /* Message context */
    sepol_context_t *netmsg_con;
};

struct sepol_iface_key {

    /* Interface name */
    const char *name;
};

/* Key */
int sepol_iface_key_create(sepol_handle_t * handle,
               const char *name, sepol_iface_key_t ** key_ptr)
{

    sepol_iface_key_t *tmp_key =
        (sepol_iface_key_t *) malloc(sizeof(sepol_iface_key_t));

    if (!tmp_key) {
        LOGD("out of memory, could not create interface key");
        return STATUS_ERR;
    }

    tmp_key->name = name;

    *key_ptr = tmp_key;
    return STATUS_SUCCESS;
}

hidden_def(sepol_iface_key_create)

void sepol_iface_key_unpack(const sepol_iface_key_t * key, const char **name)
{

    *name = key->name;
}

hidden_def(sepol_iface_key_unpack)

int sepol_iface_key_extract(sepol_handle_t * handle,
                const sepol_iface_t * iface,
                sepol_iface_key_t ** key_ptr)
{

    if (sepol_iface_key_create(handle, iface->name, key_ptr) < 0) {
        LOGD("could not extract key from "
            "interface %s", iface->name);
        return STATUS_ERR;
    }

    return STATUS_SUCCESS;
}

void sepol_iface_key_free(sepol_iface_key_t * key)
{
    free(key);
}

int sepol_iface_compare(const sepol_iface_t * iface,
            const sepol_iface_key_t * key)
{

    return strcmp(iface->name, key->name);
}

int sepol_iface_compare2(const sepol_iface_t * iface,
             const sepol_iface_t * iface2)
{

    return strcmp(iface->name, iface2->name);
}

/* Create */
int sepol_iface_create(sepol_handle_t * handle, sepol_iface_t ** iface)
{

    sepol_iface_t *tmp_iface =
        (sepol_iface_t *) malloc(sizeof(sepol_iface_t));

    if (!tmp_iface) {
        LOGD("out of memory, could not create "
            "interface record");
        return STATUS_ERR;
    }

    tmp_iface->name = NULL;
    tmp_iface->netif_con = NULL;
    tmp_iface->netmsg_con = NULL;
    *iface = tmp_iface;

    return STATUS_SUCCESS;
}

hidden_def(sepol_iface_create)

/* Name */
const char *sepol_iface_get_name(const sepol_iface_t * iface)
{

    return iface->name;
}

hidden_def(sepol_iface_get_name)

int sepol_iface_set_name(sepol_handle_t * handle,
             sepol_iface_t * iface, const char *name)
{

    char *tmp_name = strdup(name);
    if (!tmp_name) {
        LOGD("out of memory, " "could not set interface name");
        return STATUS_ERR;
    }
    free(iface->name);
    iface->name = tmp_name;
    return STATUS_SUCCESS;
}

hidden_def(sepol_iface_set_name)

/* Interface Context */
sepol_context_t *sepol_iface_get_ifcon(const sepol_iface_t * iface)
{

    return iface->netif_con;
}

hidden_def(sepol_iface_get_ifcon)

int sepol_iface_set_ifcon(sepol_handle_t * handle,
              sepol_iface_t * iface, sepol_context_t * con)
{

    sepol_context_t *newcon;

    if (sepol_context_clone(handle, con, &newcon) < 0) {
        LOGD("out of memory, could not set interface context");
        return STATUS_ERR;
    }

    sepol_context_free(iface->netif_con);
    iface->netif_con = newcon;
    return STATUS_SUCCESS;
}

hidden_def(sepol_iface_set_ifcon)

/* Message Context */
sepol_context_t *sepol_iface_get_msgcon(const sepol_iface_t * iface)
{

    return iface->netmsg_con;
}

hidden_def(sepol_iface_get_msgcon)

int sepol_iface_set_msgcon(sepol_handle_t * handle,
               sepol_iface_t * iface, sepol_context_t * con)
{

    sepol_context_t *newcon;
    if (sepol_context_clone(handle, con, &newcon) < 0) {
        LOGD("out of memory, could not set message context");
        return STATUS_ERR;
    }

    sepol_context_free(iface->netmsg_con);
    iface->netmsg_con = newcon;
    return STATUS_SUCCESS;
}

hidden_def(sepol_iface_set_msgcon)

/* Deep copy clone */
int sepol_iface_clone(sepol_handle_t * handle,
              const sepol_iface_t * iface, sepol_iface_t ** iface_ptr)
{

    sepol_iface_t *new_iface = NULL;
    if (sepol_iface_create(handle, &new_iface) < 0)
        goto err;

    if (sepol_iface_set_name(handle, new_iface, iface->name) < 0)
        goto err;

    if (iface->netif_con &&
        (sepol_context_clone
         (handle, iface->netif_con, &new_iface->netif_con) < 0))
        goto err;

    if (iface->netmsg_con &&
        (sepol_context_clone
         (handle, iface->netmsg_con, &new_iface->netmsg_con) < 0))
        goto err;

    *iface_ptr = new_iface;
    return STATUS_SUCCESS;

      err:
    LOGD("could not clone interface record");
    sepol_iface_free(new_iface);
    return STATUS_ERR;
}

/* Destroy */
void sepol_iface_free(sepol_iface_t * iface)
{

    if (!iface)
        return;

    free(iface->name);
    sepol_context_free(iface->netif_con);
    sepol_context_free(iface->netmsg_con);
    free(iface);
}

hidden_def(sepol_iface_free)