/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* For TIOCINQ/OUTQ */ #include #include #include #include #include #include #include #include /* * IP over AX.25 encapsulation. */ /* * Shove an AX.25 UI header on an IP packet and handle ARP */ #ifdef CONFIG_INET static int ax25_hard_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, const void *daddr, const void *saddr, unsigned int len) { unsigned char *buff; /* they sometimes come back to us... */ if (type == ETH_P_AX25) return 0; /* header is an AX.25 UI frame from us to them */ buff = skb_push(skb, AX25_HEADER_LEN); *buff++ = 0x00; /* KISS DATA */ if (daddr != NULL) memcpy(buff, daddr, dev->addr_len); /* Address specified */ buff[6] &= ~AX25_CBIT; buff[6] &= ~AX25_EBIT; buff[6] |= AX25_SSSID_SPARE; buff += AX25_ADDR_LEN; if (saddr != NULL) memcpy(buff, saddr, dev->addr_len); else memcpy(buff, dev->dev_addr, dev->addr_len); buff[6] &= ~AX25_CBIT; buff[6] |= AX25_EBIT; buff[6] |= AX25_SSSID_SPARE; buff += AX25_ADDR_LEN; *buff++ = AX25_UI; /* UI */ /* Append a suitable AX.25 PID */ switch (type) { case ETH_P_IP: *buff++ = AX25_P_IP; break; case ETH_P_ARP: *buff++ = AX25_P_ARP; break; default: printk(KERN_ERR "AX.25: ax25_hard_header - wrong protocol type 0x%2.2x\n", type); *buff++ = 0; break; } if (daddr != NULL) return AX25_HEADER_LEN; return -AX25_HEADER_LEN; /* Unfinished header */ } netdev_tx_t ax25_ip_xmit(struct sk_buff *skb) { struct sk_buff *ourskb; unsigned char *bp = skb->data; ax25_route *route; struct net_device *dev = NULL; ax25_address *src, *dst; ax25_digi *digipeat = NULL; ax25_dev *ax25_dev; ax25_cb *ax25; char ip_mode = ' '; dst = (ax25_address *)(bp + 1); src = (ax25_address *)(bp + 8); route = ax25_get_route(dst, NULL); if (route) { digipeat = route->digipeat; dev = route->dev; ip_mode = route->ip_mode; } if (dev == NULL) dev = skb->dev; if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) { kfree_skb(skb); goto put; } if (bp[16] == AX25_P_IP) { if (ip_mode == 'V' || (ip_mode == ' ' && ax25_dev->values[AX25_VALUES_IPDEFMODE])) { /* * We copy the buffer and release the original thereby * keeping it straight * * Note: we report 1 back so the caller will * not feed the frame direct to the physical device * We don't want that to happen. (It won't be upset * as we have pulled the frame from the queue by * freeing it). * * NB: TCP modifies buffers that are still * on a device queue, thus we use skb_copy() * instead of using skb_clone() unless this * gets fixed. */ ax25_address src_c; ax25_address dst_c; if ((ourskb = skb_copy(skb, GFP_ATOMIC)) == NULL) { kfree_skb(skb); goto put; } if (skb->sk != NULL) skb_set_owner_w(ourskb, skb->sk); kfree_skb(skb); /* dl9sau: bugfix * after kfree_skb(), dst and src which were pointer * to bp which is part of skb->data would not be valid * anymore hope that after skb_pull(ourskb, ..) our * dsc_c and src_c will not become invalid */ bp = ourskb->data; dst_c = *(ax25_address *)(bp + 1); src_c = *(ax25_address *)(bp + 8); skb_pull(ourskb, AX25_HEADER_LEN - 1); /* Keep PID */ skb_reset_network_header(ourskb); ax25=ax25_send_frame( ourskb, ax25_dev->values[AX25_VALUES_PACLEN], &src_c, &dst_c, digipeat, dev); if (ax25) { ax25_cb_put(ax25); } goto put; } } bp[7] &= ~AX25_CBIT; bp[7] &= ~AX25_EBIT; bp[7] |= AX25_SSSID_SPARE; bp[14] &= ~AX25_CBIT; bp[14] |= AX25_EBIT; bp[14] |= AX25_SSSID_SPARE; skb_pull(skb, AX25_KISS_HEADER_LEN); if (digipeat != NULL) { if ((ourskb = ax25_rt_build_path(skb, src, dst, route->digipeat)) == NULL) { kfree_skb(skb); goto put; } skb = ourskb; } ax25_queue_xmit(skb, dev); put: if (route) ax25_put_route(route); return NETDEV_TX_OK; } #else /* INET */ static int ax25_hard_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, const void *daddr, const void *saddr, unsigned int len) { return -AX25_HEADER_LEN; } netdev_tx_t ax25_ip_xmit(struct sk_buff *skb) { kfree_skb(skb); return NETDEV_TX_OK; } #endif static bool ax25_validate_header(const char *header, unsigned int len) { ax25_digi digi; if (!len) return false; if (header[0]) return true; return ax25_addr_parse(header + 1, len - 1, NULL, NULL, &digi, NULL, NULL); } const struct header_ops ax25_header_ops = { .create = ax25_hard_header, .validate = ax25_validate_header, }; EXPORT_SYMBOL(ax25_header_ops); EXPORT_SYMBOL(ax25_ip_xmit); ac (diff)parent0a8fd1346254974c3a852338508e4a4cddbb35f1 (diff)
Merge tag 'usb-4.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH: "Here are a bunch of USB fixes for 4.10-rc3. Yeah, it's a lot, an artifact of the holiday break I think. Lots of gadget and the usual XHCI fixups for reported issues (one day that driver will calm down...) Also included are a bunch of usb-serial driver fixes, and for good measure, a number of much-reported MUSB driver issues have finally been resolved. All of these have been in linux-next with no reported issues" * tag 'usb-4.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (72 commits) USB: fix problems with duplicate endpoint addresses usb: ohci-at91: use descriptor-based gpio APIs correctly usb: storage: unusual_uas: Add JMicron JMS56x to unusual device usb: hub: Move hub_port_disable() to fix warning if PM is disabled usb: musb: blackfin: add bfin_fifo_offset in bfin_ops usb: musb: fix compilation warning on unused function usb: musb: Fix trying to free already-free IRQ 4 usb: musb: dsps: implement clear_ep_rxintr() callback usb: musb: core: add clear_ep_rxintr() to musb_platform_ops USB: serial: ti_usb_3410_5052: fix NULL-deref at open USB: serial: spcp8x5: fix NULL-deref at open USB: serial: quatech2: fix sleep-while-atomic in close USB: serial: pl2303: fix NULL-deref at open USB: serial: oti6858: fix NULL-deref at open USB: serial: omninet: fix NULL-derefs at open and disconnect USB: serial: mos7840: fix misleading interrupt-URB comment USB: serial: mos7840: remove unused write URB USB: serial: mos7840: fix NULL-deref at open USB: serial: mos7720: remove obsolete port initialisation USB: serial: mos7720: fix parallel probe ...
Diffstat (limited to 'net/sctp/input.c')