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| author | thompsa <thompsa@FreeBSD.org> | 2009-10-15 20:15:29 +0000 |
|---|---|---|
| committer | thompsa <thompsa@FreeBSD.org> | 2009-10-15 20:15:29 +0000 |
| commit | 90b45d56e049b5deec9586a1b8d063f29a080659 (patch) | |
| tree | d6ab8cf86dc703968a721da664460460b3f0754d /sys/dev/usb/net/if_cdce.c | |
| parent | 28fa11c198424d320d80cec096248bc5359db04a (diff) | |
| download | FreeBSD-src-90b45d56e049b5deec9586a1b8d063f29a080659.zip FreeBSD-src-90b45d56e049b5deec9586a1b8d063f29a080659.tar.gz | |
Correct offset calcluation for the NCM implementation.
Submitted by: HPS
Diffstat (limited to 'sys/dev/usb/net/if_cdce.c')
| -rw-r--r-- | sys/dev/usb/net/if_cdce.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/sys/dev/usb/net/if_cdce.c b/sys/dev/usb/net/if_cdce.c index 86f7a9b..cb33249 100644 --- a/sys/dev/usb/net/if_cdce.c +++ b/sys/dev/usb/net/if_cdce.c @@ -1088,7 +1088,7 @@ cdce_ncm_fill_tx_frames(struct usb_xfer *xfer, uint8_t index) sc->sc_ncm.hdr.dwSignature[2] = 'M'; sc->sc_ncm.hdr.dwSignature[3] = 'H'; USETW(sc->sc_ncm.hdr.wHeaderLength, sizeof(sc->sc_ncm.hdr)); - USETW(sc->sc_ncm.hdr.wBlockLength, offset); + USETW(sc->sc_ncm.hdr.wBlockLength, last_offset); USETW(sc->sc_ncm.hdr.wSequence, sc->sc_ncm.tx_seq); USETW(sc->sc_ncm.hdr.wDptIndex, sizeof(sc->sc_ncm.hdr)); @@ -1243,25 +1243,24 @@ cdce_ncm_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error) offset = UGETW(sc->sc_ncm.dp[x].wFrameIndex); temp = UGETW(sc->sc_ncm.dp[x].wFrameLength); - if ((offset + temp) > actlen) { - DPRINTFN(1, "invalid frame detected (ignored)\n"); - m = NULL; - } else if (temp >= sizeof(struct ether_header)) { - /* - * allocate a suitable memory buffer, if - * possible - */ - if (temp > (MCLBYTES - ETHER_ALIGN)) { - m = NULL; - continue; - } if (temp > (MHLEN - ETHER_ALIGN)) { - m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); - } else { - m = m_gethdr(M_DONTWAIT, MT_DATA); - } + if ((offset == 0) || + (temp < sizeof(struct ether_header)) || + (temp > (MCLBYTES - ETHER_ALIGN))) { + DPRINTFN(1, "NULL frame detected at %d\n", x); + m = NULL; + /* silently ignore this frame */ + continue; + } else if ((offset + temp) > actlen) { + DPRINTFN(1, "invalid frame " + "detected at %d\n", x); + m = NULL; + /* silently ignore this frame */ + continue; + } else if (temp > (MHLEN - ETHER_ALIGN)) { + m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); } else { - m = NULL; /* dump it */ + m = m_gethdr(M_DONTWAIT, MT_DATA); } DPRINTFN(16, "frame %u, offset = %u, length = %u \n", |
