^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Generic HDLC support routines for Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Point-to-point protocol support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1999 - 2008 Krzysztof Halasa <khc@pm.waw.pl>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/hdlc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/inetdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/pkt_sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define DEBUG_CP 0 /* also bytes# to dump */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define DEBUG_STATE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define DEBUG_HARD_HEADER 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define HDLC_ADDR_ALLSTATIONS 0xFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define HDLC_CTRL_UI 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define PID_LCP 0xC021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define PID_IP 0x0021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define PID_IPCP 0x8021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define PID_IPV6 0x0057
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define PID_IPV6CP 0x8057
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) enum {IDX_LCP = 0, IDX_IPCP, IDX_IPV6CP, IDX_COUNT};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) enum {CP_CONF_REQ = 1, CP_CONF_ACK, CP_CONF_NAK, CP_CONF_REJ, CP_TERM_REQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) CP_TERM_ACK, CP_CODE_REJ, LCP_PROTO_REJ, LCP_ECHO_REQ, LCP_ECHO_REPLY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) LCP_DISC_REQ, CP_CODES};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #if DEBUG_CP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static const char *const code_names[CP_CODES] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) "0", "ConfReq", "ConfAck", "ConfNak", "ConfRej", "TermReq",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) "TermAck", "CodeRej", "ProtoRej", "EchoReq", "EchoReply", "Discard"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static char debug_buffer[64 + 3 * DEBUG_CP];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) enum {LCP_OPTION_MRU = 1, LCP_OPTION_ACCM, LCP_OPTION_MAGIC = 5};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct hdlc_header {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) u8 address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) u8 control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) __be16 protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct cp_header {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) u8 code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) u8 id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) __be16 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct proto {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct timer_list timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) unsigned long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) u16 pid; /* protocol ID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) u8 state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) u8 cr_id; /* ID of last Configuration-Request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) u8 restart_counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct ppp {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct proto protos[IDX_COUNT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) unsigned long last_pong;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) unsigned int req_timeout, cr_retries, term_retries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) unsigned int keepalive_interval, keepalive_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) u8 seq; /* local sequence number for requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) u8 echo_id; /* ID of last Echo-Request (LCP) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) enum {CLOSED = 0, STOPPED, STOPPING, REQ_SENT, ACK_RECV, ACK_SENT, OPENED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) STATES, STATE_MASK = 0xF};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) enum {START = 0, STOP, TO_GOOD, TO_BAD, RCR_GOOD, RCR_BAD, RCA, RCN, RTR, RTA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) RUC, RXJ_GOOD, RXJ_BAD, EVENTS};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) enum {INV = 0x10, IRC = 0x20, ZRC = 0x40, SCR = 0x80, SCA = 0x100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) SCN = 0x200, STR = 0x400, STA = 0x800, SCJ = 0x1000};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #if DEBUG_STATE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static const char *const state_names[STATES] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) "Closed", "Stopped", "Stopping", "ReqSent", "AckRecv", "AckSent",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) "Opened"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static const char *const event_names[EVENTS] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) "Start", "Stop", "TO+", "TO-", "RCR+", "RCR-", "RCA", "RCN",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) "RTR", "RTA", "RUC", "RXJ+", "RXJ-"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static struct sk_buff_head tx_queue; /* used when holding the spin lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int ppp_ioctl(struct net_device *dev, struct ifreq *ifr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static inline struct ppp* get_ppp(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return (struct ppp *)dev_to_hdlc(dev)->state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static inline struct proto* get_proto(struct net_device *dev, u16 pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct ppp *ppp = get_ppp(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) switch (pid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) case PID_LCP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return &ppp->protos[IDX_LCP];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) case PID_IPCP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return &ppp->protos[IDX_IPCP];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) case PID_IPV6CP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return &ppp->protos[IDX_IPV6CP];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static inline const char* proto_name(u16 pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) switch (pid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) case PID_LCP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return "LCP";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) case PID_IPCP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return "IPCP";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) case PID_IPV6CP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return "IPV6CP";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static __be16 ppp_type_trans(struct sk_buff *skb, struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct hdlc_header *data = (struct hdlc_header*)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (skb->len < sizeof(struct hdlc_header))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return htons(ETH_P_HDLC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (data->address != HDLC_ADDR_ALLSTATIONS ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) data->control != HDLC_CTRL_UI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return htons(ETH_P_HDLC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) switch (data->protocol) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) case cpu_to_be16(PID_IP):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) skb_pull(skb, sizeof(struct hdlc_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return htons(ETH_P_IP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) case cpu_to_be16(PID_IPV6):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) skb_pull(skb, sizeof(struct hdlc_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return htons(ETH_P_IPV6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return htons(ETH_P_HDLC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int ppp_hard_header(struct sk_buff *skb, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) u16 type, const void *daddr, const void *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct hdlc_header *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) #if DEBUG_HARD_HEADER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) printk(KERN_DEBUG "%s: ppp_hard_header() called\n", dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) skb_push(skb, sizeof(struct hdlc_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) data = (struct hdlc_header*)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) data->address = HDLC_ADDR_ALLSTATIONS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) data->control = HDLC_CTRL_UI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) case ETH_P_IP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) data->protocol = htons(PID_IP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) case ETH_P_IPV6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) data->protocol = htons(PID_IPV6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) case PID_LCP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) case PID_IPCP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) case PID_IPV6CP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) data->protocol = htons(type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) default: /* unknown protocol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) data->protocol = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return sizeof(struct hdlc_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static void ppp_tx_flush(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) while ((skb = skb_dequeue(&tx_queue)) != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) dev_queue_xmit(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static void ppp_tx_cp(struct net_device *dev, u16 pid, u8 code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) u8 id, unsigned int len, const void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) struct cp_header *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) unsigned int magic_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static u32 magic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) #if DEBUG_CP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (pid == PID_LCP && (code == LCP_ECHO_REQ || code == LCP_ECHO_REPLY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) magic_len = sizeof(magic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) skb = dev_alloc_skb(sizeof(struct hdlc_header) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) sizeof(struct cp_header) + magic_len + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) netdev_warn(dev, "out of memory in ppp_tx_cp()\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) skb_reserve(skb, sizeof(struct hdlc_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) cp = skb_put(skb, sizeof(struct cp_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) cp->code = code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) cp->id = id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) cp->len = htons(sizeof(struct cp_header) + magic_len + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (magic_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) skb_put_data(skb, &magic, magic_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) skb_put_data(skb, data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) #if DEBUG_CP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) BUG_ON(code >= CP_CODES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) ptr = debug_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) *ptr = '\x0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) for (i = 0; i < min_t(unsigned int, magic_len + len, DEBUG_CP); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) sprintf(ptr, " %02X", skb->data[sizeof(struct cp_header) + i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) ptr += strlen(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) printk(KERN_DEBUG "%s: TX %s [%s id 0x%X]%s\n", dev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) proto_name(pid), code_names[code], id, debug_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) ppp_hard_header(skb, dev, pid, NULL, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) skb->priority = TC_PRIO_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) skb->protocol = htons(ETH_P_HDLC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) skb_queue_tail(&tx_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* State transition table (compare STD-51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) Events Actions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) TO+ = Timeout with counter > 0 irc = Initialize-Restart-Count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) TO- = Timeout with counter expired zrc = Zero-Restart-Count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) RCR+ = Receive-Configure-Request (Good) scr = Send-Configure-Request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) RCR- = Receive-Configure-Request (Bad)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) RCA = Receive-Configure-Ack sca = Send-Configure-Ack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) RCN = Receive-Configure-Nak/Rej scn = Send-Configure-Nak/Rej
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) RTR = Receive-Terminate-Request str = Send-Terminate-Request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) RTA = Receive-Terminate-Ack sta = Send-Terminate-Ack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) RUC = Receive-Unknown-Code scj = Send-Code-Reject
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) RXJ+ = Receive-Code-Reject (permitted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) or Receive-Protocol-Reject
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) RXJ- = Receive-Code-Reject (catastrophic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) or Receive-Protocol-Reject
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) static int cp_table[EVENTS][STATES] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /* CLOSED STOPPED STOPPING REQ_SENT ACK_RECV ACK_SENT OPENED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 0 1 2 3 4 5 6 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {IRC|SCR|3, INV , INV , INV , INV , INV , INV }, /* START */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) { INV , 0 , 0 , 0 , 0 , 0 , 0 }, /* STOP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) { INV , INV ,STR|2, SCR|3 ,SCR|3, SCR|5 , INV }, /* TO+ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) { INV , INV , 1 , 1 , 1 , 1 , INV }, /* TO- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) { STA|0 ,IRC|SCR|SCA|5, 2 , SCA|5 ,SCA|6, SCA|5 ,SCR|SCA|5}, /* RCR+ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) { STA|0 ,IRC|SCR|SCN|3, 2 , SCN|3 ,SCN|4, SCN|3 ,SCR|SCN|3}, /* RCR- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) { STA|0 , STA|1 , 2 , IRC|4 ,SCR|3, 6 , SCR|3 }, /* RCA */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) { STA|0 , STA|1 , 2 ,IRC|SCR|3,SCR|3,IRC|SCR|5, SCR|3 }, /* RCN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) { STA|0 , STA|1 ,STA|2, STA|3 ,STA|3, STA|3 ,ZRC|STA|2}, /* RTR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) { 0 , 1 , 1 , 3 , 3 , 5 , SCR|3 }, /* RTA */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) { SCJ|0 , SCJ|1 ,SCJ|2, SCJ|3 ,SCJ|4, SCJ|5 , SCJ|6 }, /* RUC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) { 0 , 1 , 2 , 3 , 3 , 5 , 6 }, /* RXJ+ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) { 0 , 1 , 1 , 1 , 1 , 1 ,IRC|STR|2}, /* RXJ- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) /* SCA: RCR+ must supply id, len and data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) SCN: RCR- must supply code, id, len and data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) STA: RTR must supply id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) SCJ: RUC must supply CP packet len and data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) static void ppp_cp_event(struct net_device *dev, u16 pid, u16 event, u8 code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) u8 id, unsigned int len, const void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) int old_state, action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct ppp *ppp = get_ppp(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) struct proto *proto = get_proto(dev, pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) old_state = proto->state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) BUG_ON(old_state >= STATES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) BUG_ON(event >= EVENTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) #if DEBUG_STATE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) printk(KERN_DEBUG "%s: %s ppp_cp_event(%s) %s ...\n", dev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) proto_name(pid), event_names[event], state_names[proto->state]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) action = cp_table[event][old_state];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) proto->state = action & STATE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (action & (SCR | STR)) /* set Configure-Req/Terminate-Req timer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) mod_timer(&proto->timer, proto->timeout =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) jiffies + ppp->req_timeout * HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) if (action & ZRC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) proto->restart_counter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (action & IRC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) proto->restart_counter = (proto->state == STOPPING) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) ppp->term_retries : ppp->cr_retries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) if (action & SCR) /* send Configure-Request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ppp_tx_cp(dev, pid, CP_CONF_REQ, proto->cr_id = ++ppp->seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (action & SCA) /* send Configure-Ack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) ppp_tx_cp(dev, pid, CP_CONF_ACK, id, len, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (action & SCN) /* send Configure-Nak/Reject */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) ppp_tx_cp(dev, pid, code, id, len, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) if (action & STR) /* send Terminate-Request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) ppp_tx_cp(dev, pid, CP_TERM_REQ, ++ppp->seq, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (action & STA) /* send Terminate-Ack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) ppp_tx_cp(dev, pid, CP_TERM_ACK, id, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (action & SCJ) /* send Code-Reject */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) ppp_tx_cp(dev, pid, CP_CODE_REJ, ++ppp->seq, len, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (old_state != OPENED && proto->state == OPENED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) netdev_info(dev, "%s up\n", proto_name(pid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (pid == PID_LCP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) netif_dormant_off(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) ppp_cp_event(dev, PID_IPCP, START, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) ppp_cp_event(dev, PID_IPV6CP, START, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) ppp->last_pong = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) mod_timer(&proto->timer, proto->timeout =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) jiffies + ppp->keepalive_interval * HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) if (old_state == OPENED && proto->state != OPENED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) netdev_info(dev, "%s down\n", proto_name(pid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (pid == PID_LCP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) netif_dormant_on(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) ppp_cp_event(dev, PID_IPCP, STOP, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) ppp_cp_event(dev, PID_IPV6CP, STOP, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (old_state != CLOSED && proto->state == CLOSED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) del_timer(&proto->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) #if DEBUG_STATE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) printk(KERN_DEBUG "%s: %s ppp_cp_event(%s) ... %s\n", dev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) proto_name(pid), event_names[event], state_names[proto->state]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static void ppp_cp_parse_cr(struct net_device *dev, u16 pid, u8 id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) unsigned int req_len, const u8 *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) static u8 const valid_accm[6] = { LCP_OPTION_ACCM, 6, 0, 0, 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) const u8 *opt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) u8 *out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) unsigned int len = req_len, nak_len = 0, rej_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (!(out = kmalloc(len, GFP_ATOMIC))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) dev->stats.rx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) return; /* out of memory, ignore CR packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) for (opt = data; len; len -= opt[1], opt += opt[1]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (len < 2 || opt[1] < 2 || len < opt[1])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) if (pid == PID_LCP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) switch (opt[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) case LCP_OPTION_MRU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) continue; /* MRU always OK and > 1500 bytes? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) case LCP_OPTION_ACCM: /* async control character map */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (opt[1] < sizeof(valid_accm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (!memcmp(opt, valid_accm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) sizeof(valid_accm)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if (!rej_len) { /* NAK it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) memcpy(out + nak_len, valid_accm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) sizeof(valid_accm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) nak_len += sizeof(valid_accm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) case LCP_OPTION_MAGIC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) if (len < 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (opt[1] != 6 || (!opt[2] && !opt[3] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) !opt[4] && !opt[5]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) break; /* reject invalid magic number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) /* reject this option */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) memcpy(out + rej_len, opt, opt[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) rej_len += opt[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (rej_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) ppp_cp_event(dev, pid, RCR_BAD, CP_CONF_REJ, id, rej_len, out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) else if (nak_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) ppp_cp_event(dev, pid, RCR_BAD, CP_CONF_NAK, id, nak_len, out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) ppp_cp_event(dev, pid, RCR_GOOD, CP_CONF_ACK, id, req_len, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) kfree(out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) dev->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) kfree(out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) static int ppp_rx(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) struct hdlc_header *hdr = (struct hdlc_header*)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) struct net_device *dev = skb->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) struct ppp *ppp = get_ppp(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) struct proto *proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) struct cp_header *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) u16 pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) #if DEBUG_CP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) spin_lock_irqsave(&ppp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /* Check HDLC header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (skb->len < sizeof(struct hdlc_header))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) goto rx_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) cp = skb_pull(skb, sizeof(struct hdlc_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (hdr->address != HDLC_ADDR_ALLSTATIONS ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) hdr->control != HDLC_CTRL_UI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) goto rx_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) pid = ntohs(hdr->protocol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) proto = get_proto(dev, pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (!proto) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (ppp->protos[IDX_LCP].state == OPENED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) ppp_tx_cp(dev, PID_LCP, LCP_PROTO_REJ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) ++ppp->seq, skb->len + 2, &hdr->protocol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) goto rx_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) len = ntohs(cp->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (len < sizeof(struct cp_header) /* no complete CP header? */ ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) skb->len < len /* truncated packet? */)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) goto rx_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) skb_pull(skb, sizeof(struct cp_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) len -= sizeof(struct cp_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) /* HDLC and CP headers stripped from skb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) #if DEBUG_CP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (cp->code < CP_CODES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) sprintf(debug_buffer, "[%s id 0x%X]", code_names[cp->code],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) cp->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) sprintf(debug_buffer, "[code %u id 0x%X]", cp->code, cp->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) ptr = debug_buffer + strlen(debug_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) for (i = 0; i < min_t(unsigned int, len, DEBUG_CP); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) sprintf(ptr, " %02X", skb->data[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) ptr += strlen(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) printk(KERN_DEBUG "%s: RX %s %s\n", dev->name, proto_name(pid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) debug_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) /* LCP only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (pid == PID_LCP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) switch (cp->code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) case LCP_PROTO_REJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) pid = ntohs(*(__be16*)skb->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) if (pid == PID_LCP || pid == PID_IPCP ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) pid == PID_IPV6CP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ppp_cp_event(dev, pid, RXJ_BAD, 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) case LCP_ECHO_REQ: /* send Echo-Reply */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (len >= 4 && proto->state == OPENED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) ppp_tx_cp(dev, PID_LCP, LCP_ECHO_REPLY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) cp->id, len - 4, skb->data + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) case LCP_ECHO_REPLY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (cp->id == ppp->echo_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) ppp->last_pong = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) case LCP_DISC_REQ: /* discard */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) /* LCP, IPCP and IPV6CP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) switch (cp->code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) case CP_CONF_REQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) ppp_cp_parse_cr(dev, pid, cp->id, len, skb->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) case CP_CONF_ACK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) if (cp->id == proto->cr_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) ppp_cp_event(dev, pid, RCA, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) case CP_CONF_REJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) case CP_CONF_NAK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (cp->id == proto->cr_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) ppp_cp_event(dev, pid, RCN, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) case CP_TERM_REQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) ppp_cp_event(dev, pid, RTR, 0, cp->id, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) case CP_TERM_ACK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) ppp_cp_event(dev, pid, RTA, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) case CP_CODE_REJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) ppp_cp_event(dev, pid, RXJ_BAD, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) len += sizeof(struct cp_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (len > dev->mtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) len = dev->mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) ppp_cp_event(dev, pid, RUC, 0, 0, len, cp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) rx_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) dev->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) spin_unlock_irqrestore(&ppp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) ppp_tx_flush();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) return NET_RX_DROP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) static void ppp_timer(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) struct proto *proto = from_timer(proto, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) struct ppp *ppp = get_ppp(proto->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) spin_lock_irqsave(&ppp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) /* mod_timer could be called after we entered this function but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) * before we got the lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (timer_pending(&proto->timer)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) spin_unlock_irqrestore(&ppp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) switch (proto->state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) case STOPPING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) case REQ_SENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) case ACK_RECV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) case ACK_SENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (proto->restart_counter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) ppp_cp_event(proto->dev, proto->pid, TO_GOOD, 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) proto->restart_counter--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) } else if (netif_carrier_ok(proto->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) ppp_cp_event(proto->dev, proto->pid, TO_GOOD, 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) ppp_cp_event(proto->dev, proto->pid, TO_BAD, 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) case OPENED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (proto->pid != PID_LCP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (time_after(jiffies, ppp->last_pong +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) ppp->keepalive_timeout * HZ)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) netdev_info(proto->dev, "Link down\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) ppp_cp_event(proto->dev, PID_LCP, STOP, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) ppp_cp_event(proto->dev, PID_LCP, START, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) } else { /* send keep-alive packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) ppp->echo_id = ++ppp->seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) ppp_tx_cp(proto->dev, PID_LCP, LCP_ECHO_REQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) ppp->echo_id, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) proto->timer.expires = jiffies +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) ppp->keepalive_interval * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) add_timer(&proto->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) spin_unlock_irqrestore(&ppp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) ppp_tx_flush();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) static void ppp_start(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) struct ppp *ppp = get_ppp(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) for (i = 0; i < IDX_COUNT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) struct proto *proto = &ppp->protos[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) proto->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) timer_setup(&proto->timer, ppp_timer, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) proto->state = CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) ppp->protos[IDX_LCP].pid = PID_LCP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) ppp->protos[IDX_IPCP].pid = PID_IPCP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) ppp->protos[IDX_IPV6CP].pid = PID_IPV6CP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) ppp_cp_event(dev, PID_LCP, START, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) static void ppp_stop(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) ppp_cp_event(dev, PID_LCP, STOP, 0, 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) static void ppp_close(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) ppp_tx_flush();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) static struct hdlc_proto proto = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) .start = ppp_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) .stop = ppp_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) .close = ppp_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) .type_trans = ppp_type_trans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) .ioctl = ppp_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) .netif_rx = ppp_rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) static const struct header_ops ppp_header_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) .create = ppp_hard_header,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) static int ppp_ioctl(struct net_device *dev, struct ifreq *ifr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) hdlc_device *hdlc = dev_to_hdlc(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) struct ppp *ppp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) switch (ifr->ifr_settings.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) case IF_GET_PROTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (dev_to_hdlc(dev)->proto != &proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) ifr->ifr_settings.type = IF_PROTO_PPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) return 0; /* return protocol only, no settable parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) case IF_PROTO_PPP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) if (!capable(CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (dev->flags & IFF_UP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) /* no settable parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) result = hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) result = attach_hdlc_protocol(dev, &proto, sizeof(struct ppp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) ppp = get_ppp(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) spin_lock_init(&ppp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) ppp->req_timeout = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) ppp->cr_retries = 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) ppp->term_retries = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) ppp->keepalive_interval = 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) ppp->keepalive_timeout = 60;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) dev->hard_header_len = sizeof(struct hdlc_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) dev->header_ops = &ppp_header_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) dev->type = ARPHRD_PPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) netif_dormant_on(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) static int __init mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) skb_queue_head_init(&tx_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) register_hdlc_protocol(&proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) static void __exit mod_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) unregister_hdlc_protocol(&proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) module_init(mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) module_exit(mod_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) MODULE_DESCRIPTION("PPP protocol support for generic HDLC");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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