ssize_t ipulog_read(struct ipulog_handle *h, unsigned char *buf,
size_t len, int timeout)
{
/* 'timeout' was never implemented in the original libipulog,
* so we don't bother emulating it */
return nfnl_recv(nflog_nfnlh(h->nfulh), buf, len);
}
/**
* nflog_fd - get the file descriptor associated with the nflog handler
* \param log handler obtained via call to nflog_open()
*
* \return a file descriptor for the netlink connection associated with the
* given log connection handle. The file descriptor can then be used for
* receiving the logged packets for processing.
*
* This function returns a file descriptor that can be used for communication
* over the netlink connection associated with the given log connection
* handle.
*/
int nflog_fd(struct nflog_handle *h)
{
return nfnl_fd(nflog_nfnlh(h));
}
ulog_packet_msg_t *ipulog_get_packet(struct ipulog_handle *h,
const unsigned char *buf,
size_t len)
{
struct nlmsghdr *nlh;
struct nfattr *tb[NFULA_MAX];
struct nfulnl_msg_packet_hdr *hdr;
if (!h->last_nlh) {
printf("first\n");
nlh = nfnl_get_msg_first(nflog_nfnlh(h->nfulh), buf, len);
}else {
next_msg: printf("next\n");
nlh = nfnl_get_msg_next(nflog_nfnlh(h->nfulh), buf, len);
}
h->last_nlh = nlh;
if (!nlh)
return NULL;
nfnl_parse_attr(tb, NFULA_MAX, NFM_NFA(NLMSG_DATA(nlh)),
NFM_PAYLOAD(nlh));
if (!tb[NFULA_PACKET_HDR-1])
goto next_msg;
/* now build the fake ulog_packet_msg */
hdr = NFA_DATA(tb[NFULA_PACKET_HDR-1]);
h->upmsg.hook = hdr->hook;
if (tb[NFULA_MARK-1])
h->upmsg.mark = ntohl(*(u_int32_t *)NFA_DATA(tb[NFULA_MARK-1]));
else
h->upmsg.mark = 0;
if (tb[NFULA_TIMESTAMP]) {
/* FIXME: 64bit network-to-host */
h->upmsg.timestamp_sec = h->upmsg.timestamp_usec = 0;
} else
h->upmsg.timestamp_sec = h->upmsg.timestamp_usec = 0;
if (tb[NFULA_IFINDEX_INDEV-1]) {
/* FIXME: ifindex lookup */
h->upmsg.indev_name[0] = '\0';
} else
h->upmsg.indev_name[0] = '\0';
if (tb[NFULA_IFINDEX_OUTDEV-1]) {
/* FIXME: ifindex lookup */
h->upmsg.outdev_name[0] = '\0';
} else
h->upmsg.outdev_name[0] = '\0';
if (tb[NFULA_HWADDR-1]) {
struct nfulnl_msg_packet_hw *phw = NFA_DATA(tb[NFULA_HWADDR-1]);
h->upmsg.mac_len = ntohs(phw->hw_addrlen);
memcpy(h->upmsg.mac, phw->hw_addr, 8);
} else
h->upmsg.mac_len = 0;
if (tb[NFULA_PREFIX-1]) {
int plen = NFA_PAYLOAD(tb[NFULA_PREFIX-1]);
if (ULOG_PREFIX_LEN < plen)
plen = ULOG_PREFIX_LEN;
memcpy(h->upmsg.prefix, NFA_DATA(tb[NFULA_PREFIX-1]), plen);
h->upmsg.prefix[ULOG_PREFIX_LEN-1] = '\0';
}
if (tb[NFULA_PAYLOAD-1]) {
memcpy(h->upmsg.payload, NFA_DATA(tb[NFULA_PAYLOAD-1]),
NFA_PAYLOAD(tb[NFULA_PAYLOAD-1]));
h->upmsg.data_len = NFA_PAYLOAD(tb[NFULA_PAYLOAD-1]);
} else
h->upmsg.data_len = 0;
return &h->upmsg;
}
