mirror of
https://github.com/lwip-tcpip/lwip.git
synced 2025-03-15 22:21:51 +00:00
implement udp/raw recvmsg() by moving recvfrom() into a common function taking an array of iovecs... (IP_PKTINFO/in_pktinfo still missing)
This commit is contained in:
goldsimon
parent
59973c96e4
commit
eb1aadb218
@ -831,6 +831,7 @@ lwip_listen(int s, int backlog)
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/* Helper function to loop over receiving pbufs from netconn
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* until "len" bytes are received or we're otherwise done.
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* Keeps sock->lastdata for peeking or partly copying.
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*/
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static int
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lwip_recv_tcp(struct lwip_sock *sock, void *mem, size_t len, int flags)
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@ -968,6 +969,7 @@ lwip_sock_make_addr(struct netconn *conn, ip_addr_t *fromaddr, u16_t port,
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return truncated;
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}
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/* Helper function to get a tcp socket's remote address info */
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static int
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lwip_recv_tcp_from(struct lwip_sock *sock, struct sockaddr *from, socklen_t *fromlen, const char *dbg_fn, int dbg_s, int dbg_ret)
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{
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@ -996,6 +998,86 @@ lwip_recv_tcp_from(struct lwip_sock *sock, struct sockaddr *from, socklen_t *fro
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return 0;
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}
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/* Helper function to receive a netbuf from a udp or raw netconn.
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* Keeps sock->lastdata for peeking.
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*/
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static err_t
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lwip_recvfrom_udp_raw(struct lwip_sock *sock, int flags, const struct iovec *iov, int iovcnt,
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struct sockaddr *from, socklen_t *fromlen, u16_t *datagram_len, int dbg_s)
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{
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struct netbuf *buf;
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u8_t apiflags;
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err_t err;
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u16_t buflen, copylen, copied;
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int i;
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LWIP_ERROR("lwip_recvfrom_udp_raw: invalid arguments", (iov != NULL) || (iovcnt <= 0), return ERR_ARG;);
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if (flags & MSG_DONTWAIT) {
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apiflags = NETCONN_DONTBLOCK;
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} else {
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apiflags = 0;
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}
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom_udp_raw[UDP/RAW]: top sock->lastdata=%p\n", (void*)sock->lastdata.netbuf));
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/* Check if there is data left from the last recv operation. */
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buf = sock->lastdata.netbuf;
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if (buf == NULL) {
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/* No data was left from the previous operation, so we try to get
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some from the network. */
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err = netconn_recv_udp_raw_netbuf_flags(sock->conn, &buf, apiflags);
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom_udp_raw[UDP/RAW]: netconn_recv err=%d, netbuf=%p\n",
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err, (void*)buf));
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if (err != ERR_OK) {
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return err;
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}
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LWIP_ASSERT("buf != NULL", buf != NULL);
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sock->lastdata.netbuf = buf;
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}
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buflen = buf->p->tot_len;
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom_udp_raw: buflen=%"U16_F"\n", buflen));
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copied = 0;
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/* copy the pbuf payload into the iovs */
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for (i = 0; (i < iovcnt) && (copied < buflen); i++) {
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u16_t len_left = buflen - copied;
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if (iov[i].iov_len > len_left) {
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copylen = len_left;
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} else {
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copylen = (u16_t)iov[i].iov_len;
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}
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/* copy the contents of the received buffer into
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the supplied memory buffer */
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pbuf_copy_partial(buf->p, (u8_t*)iov[i].iov_base, copylen, copied);
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copied += copylen;
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}
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/* Check to see from where the data was.*/
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#if !SOCKETS_DEBUG
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if (from && fromlen)
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#endif /* !SOCKETS_DEBUG */
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{
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom_udp_raw(%d): addr=", dbg_s));
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ip_addr_debug_print(SOCKETS_DEBUG, netbuf_fromaddr(buf));
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LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F" len=%d\n", netbuf_fromport(buf), copied));
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if (from && fromlen) {
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lwip_sock_make_addr(sock->conn, netbuf_fromaddr(buf), netbuf_fromport(buf), from, fromlen);
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}
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}
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/* If we don't peek the incoming message: zero lastdata pointer and free the netbuf */
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if ((flags & MSG_PEEK) == 0) {
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sock->lastdata.netbuf = NULL;
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netbuf_delete(buf);
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}
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if (datagram_len) {
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*datagram_len = buflen;
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}
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return ERR_OK;
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}
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int
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lwip_recvfrom(int s, void *mem, size_t len, int flags,
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struct sockaddr *from, socklen_t *fromlen)
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@ -1014,71 +1096,20 @@ lwip_recvfrom(int s, void *mem, size_t len, int flags,
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done_socket(sock);
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return ret;
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} else {
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struct netbuf *buf;
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u16_t buflen, copylen;
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err_t err;
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u8_t apiflags;
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/* UDP / RAW */
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if (flags & MSG_DONTWAIT) {
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apiflags = NETCONN_DONTBLOCK;
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} else {
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apiflags = 0;
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}
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom[UDP/RAW]: top sock->lastdata=%p\n", (void*)sock->lastdata.netbuf));
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/* Check if there is data left from the last recv operation. */
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buf = sock->lastdata.netbuf;
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if (buf == NULL) {
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/* No data was left from the previous operation, so we try to get
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some from the network. */
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err = netconn_recv_udp_raw_netbuf_flags(sock->conn, &buf, apiflags);
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom[UDP/RAW]: netconn_recv err=%d, netbuf=%p\n",
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err, (void*)buf));
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if (err != ERR_OK) {
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom[UDP/RAW](%d): buf == NULL, error is \"%s\"!\n",
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s, lwip_strerr(err)));
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sock_set_errno(sock, err_to_errno(err));
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done_socket(sock);
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return -1;
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}
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LWIP_ASSERT("buf != NULL", buf != NULL);
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sock->lastdata.netbuf = buf;
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}
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buflen = buf->p->tot_len;
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: buflen=%"U16_F" len=%"SZT_F"\n",
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buflen, len));
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if (len > buflen) {
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copylen = buflen;
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} else {
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copylen = (u16_t)len;
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}
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/* copy the contents of the received buffer into
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the supplied memory pointer mem */
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pbuf_copy_partial(buf->p, (u8_t*)mem, copylen, 0);
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ret = copylen;
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/* Check to see from where the data was.*/
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#if !SOCKETS_DEBUG
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if (from && fromlen)
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#endif /* !SOCKETS_DEBUG */
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{
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s));
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ip_addr_debug_print(SOCKETS_DEBUG, netbuf_fromaddr(buf));
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LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F" len=%d\n", netbuf_fromport(buf), ret));
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if (from && fromlen) {
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lwip_sock_make_addr(sock->conn, netbuf_fromaddr(buf), netbuf_fromport(buf), from, fromlen);
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}
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}
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/* If we don't peek the incoming message: zero lastdata pointer and free the netbuf */
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if ((flags & MSG_PEEK) == 0) {
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sock->lastdata.netbuf = NULL;
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netbuf_delete(buf);
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u16_t datagram_len = 0;
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struct iovec vec;
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err_t err;
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vec.iov_base = mem;
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vec.iov_len = len;
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err = lwip_recvfrom_udp_raw(sock, flags, &vec, 1, from, fromlen, &datagram_len, s);
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if (err != ERR_OK) {
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom[UDP/RAW](%d): buf == NULL, error is \"%s\"!\n",
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s, lwip_strerr(err)));
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sock_set_errno(sock, err_to_errno(err));
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done_socket(sock);
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return -1;
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}
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ret = len < datagram_len ? len :datagram_len;
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}
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sock_set_errno(sock, 0);
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@ -1103,6 +1134,7 @@ lwip_recvmsg(int s, struct msghdr *message, int flags)
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{
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struct lwip_sock *sock;
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int recv_flags = flags;
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int buflen, i;
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvmsg(%d, message=%p, flags=0x%x)\n", s, (void*)message, flags));
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LWIP_ERROR("lwip_recvmsg: invalid message pointer", message != NULL, return ERR_ARG;);
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@ -1119,37 +1151,36 @@ lwip_recvmsg(int s, struct msghdr *message, int flags)
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return -1;
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}
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/* check for valid vectors */
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buflen = 0;
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for (i = 0; i < message->msg_iovlen; i++) {
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if ((message->msg_iov[i].iov_base == NULL) || (message->msg_iov[i].iov_len == 0) ||
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((int)(buflen + message->msg_iov[i].iov_len) <= 0)) {
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sock_set_errno(sock, ERR_VAL);
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done_socket(sock);
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return -1;
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}
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buflen += message->msg_iov[i].iov_len;
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}
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if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
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#if LWIP_TCP
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int i;
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int ret;
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/* check for valid vectors */
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ret = 0;
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for (i = 0; i < message->msg_iovlen; i++) {
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if ((message->msg_iov[i].iov_base == NULL) || (message->msg_iov[i].iov_len == 0) ||
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((int)(ret + message->msg_iov[i].iov_len) <= 0)) {
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sock_set_errno(sock, ERR_VAL);
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done_socket(sock);
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return -1;
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}
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ret += message->msg_iov[i].iov_len;
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}
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message->msg_flags = 0;
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/* recv the data */
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ret = 0;
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buflen = 0;
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for (i = 0; i < message->msg_iovlen; i++) {
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/* try to receive into this vector's buffer */
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int recvd_local = lwip_recv_tcp(sock, message->msg_iov[i].iov_base, message->msg_iov[i].iov_len, recv_flags);
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if (recvd_local > 0) {
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/* sum up received bytes */
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ret += recvd_local;
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buflen += recvd_local;
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}
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if ((recvd_local < 0) || (recvd_local < (int)message->msg_iov[i].iov_len) ||
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(flags & MSG_PEEK)) {
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/* returned prematurely (or peeking, which might actually be limitated to the first iov) */
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if (ret <= 0) {
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if (buflen <= 0) {
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/* nothing received at all, propagate the error */
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ret = recvd_local;
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buflen = recvd_local;
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}
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break;
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}
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@ -1157,28 +1188,47 @@ lwip_recvmsg(int s, struct msghdr *message, int flags)
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lwip_recv_tcp() to prevent waiting for more data */
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recv_flags |= MSG_DONTWAIT;
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}
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if (ret > 0) {
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if (buflen > 0) {
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/* reset socket error since we have received something */
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sock_set_errno(sock, 0);
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}
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if (message->msg_name && message->msg_namelen) {
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if (lwip_recv_tcp_from(sock, (struct sockaddr*)message->msg_name,
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&message->msg_namelen, "lwip_recvmsg", s, ret)) {
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message->msg_flags |= MSG_CTRUNC;
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}
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}
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/* " If the socket is connected, the msg_name and msg_namelen members shall be ignored." */
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done_socket(sock);
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return ret;
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return buflen;
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#else /* LWIP_TCP */
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sock_set_errno(sock, err_to_errno(ERR_ARG));
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done_socket(sock);
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return -1;
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#endif /* LWIP_TCP */
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}
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/* else, UDP and RAW NETCONNs: TODO! */
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/* else, UDP and RAW NETCONNs */
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#if LWIP_UDP || LWIP_RAW
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{
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u16_t datagram_len = 0;
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err_t err;
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err = lwip_recvfrom_udp_raw(sock, flags, message->msg_iov, message->msg_iovlen,
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(struct sockaddr *)message->msg_name, &message->msg_namelen, &datagram_len, s);
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if (err != ERR_OK) {
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LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvmsg[UDP/RAW](%d): buf == NULL, error is \"%s\"!\n",
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s, lwip_strerr(err)));
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sock_set_errno(sock, err_to_errno(err));
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done_socket(sock);
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return -1;
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}
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message->msg_flags = 0;
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if (datagram_len > buflen) {
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message->msg_flags |= MSG_TRUNC;
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}
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sock_set_errno(sock, 0);
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done_socket(sock);
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return (int)datagram_len;
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}
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#else /* LWIP_UDP || LWIP_RAW */
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sock_set_errno(sock, err_to_errno(ERR_ARG));
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done_socket(sock);
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return -1;
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#endif /* LWIP_UDP || LWIP_RAW */
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}
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int
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