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net/phonet/pep.c
29.7 KB
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// SPDX-License-Identifier: GPL-2.0-only |
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/* * File: pep.c * * Phonet pipe protocol end point socket * * Copyright (C) 2008 Nokia Corporation. * |
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* Author: Rémi Denis-Courmont |
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*/ #include <linux/kernel.h> |
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#include <linux/sched/signal.h> |
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#include <linux/slab.h> |
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#include <linux/socket.h> #include <net/sock.h> #include <net/tcp_states.h> #include <asm/ioctls.h> #include <linux/phonet.h> |
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#include <linux/module.h> |
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#include <net/phonet/phonet.h> #include <net/phonet/pep.h> |
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#include <net/phonet/gprs.h> |
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/* sk_state values: * TCP_CLOSE sock not in use yet * TCP_CLOSE_WAIT disconnected pipe * TCP_LISTEN listening pipe endpoint * TCP_SYN_RECV connected pipe in disabled state * TCP_ESTABLISHED connected pipe in enabled state * * pep_sock locking: |
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* - sk_state, hlist: sock lock needed |
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* - listener: read only * - pipe_handle: read only */ #define CREDITS_MAX 10 #define CREDITS_THR 7 |
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#define pep_sb_size(s) (((s) + 5) & ~3) /* 2-bytes head, 32-bits aligned */ /* Get the next TLV sub-block. */ static unsigned char *pep_get_sb(struct sk_buff *skb, u8 *ptype, u8 *plen, void *buf) { void *data = NULL; struct { u8 sb_type; u8 sb_len; } *ph, h; int buflen = *plen; ph = skb_header_pointer(skb, 0, 2, &h); if (ph == NULL || ph->sb_len < 2 || !pskb_may_pull(skb, ph->sb_len)) return NULL; ph->sb_len -= 2; *ptype = ph->sb_type; *plen = ph->sb_len; if (buflen > ph->sb_len) buflen = ph->sb_len; data = skb_header_pointer(skb, 2, buflen, buf); __skb_pull(skb, 2 + ph->sb_len); return data; } |
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static struct sk_buff *pep_alloc_skb(struct sock *sk, const void *payload, int len, gfp_t priority) { struct sk_buff *skb = alloc_skb(MAX_PNPIPE_HEADER + len, priority); if (!skb) return NULL; skb_set_owner_w(skb, sk); skb_reserve(skb, MAX_PNPIPE_HEADER); __skb_put(skb, len); skb_copy_to_linear_data(skb, payload, len); __skb_push(skb, sizeof(struct pnpipehdr)); skb_reset_transport_header(skb); return skb; } static int pep_reply(struct sock *sk, struct sk_buff *oskb, u8 code, const void *data, int len, gfp_t priority) |
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{ const struct pnpipehdr *oph = pnp_hdr(oskb); struct pnpipehdr *ph; struct sk_buff *skb; |
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struct sockaddr_pn peer; |
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|
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skb = pep_alloc_skb(sk, data, len, priority); |
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if (!skb) return -ENOMEM; |
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|
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ph = pnp_hdr(skb); ph->utid = oph->utid; ph->message_id = oph->message_id + 1; /* REQ -> RESP */ ph->pipe_handle = oph->pipe_handle; ph->error_code = code; |
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pn_skb_get_src_sockaddr(oskb, &peer); return pn_skb_send(sk, skb, &peer); |
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} |
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static int pep_indicate(struct sock *sk, u8 id, u8 code, const void *data, int len, gfp_t priority) |
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{ |
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struct pep_sock *pn = pep_sk(sk); |
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struct pnpipehdr *ph; struct sk_buff *skb; |
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|
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skb = pep_alloc_skb(sk, data, len, priority); |
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if (!skb) return -ENOMEM; |
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|
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ph = pnp_hdr(skb); |
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ph->utid = 0; ph->message_id = id; |
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ph->pipe_handle = pn->pipe_handle; |
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ph->error_code = code; |
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return pn_skb_send(sk, skb, NULL); |
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} |
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#define PAD 0x00 |
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static int pipe_handler_request(struct sock *sk, u8 id, u8 code, const void *data, int len) |
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{ |
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struct pep_sock *pn = pep_sk(sk); |
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struct pnpipehdr *ph; struct sk_buff *skb; |
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|
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skb = pep_alloc_skb(sk, data, len, GFP_KERNEL); |
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if (!skb) return -ENOMEM; |
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|
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ph = pnp_hdr(skb); |
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ph->utid = id; /* whatever */ ph->message_id = id; |
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ph->pipe_handle = pn->pipe_handle; |
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ph->error_code = code; |
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return pn_skb_send(sk, skb, NULL); |
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} |
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static int pipe_handler_send_created_ind(struct sock *sk) |
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{ |
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struct pep_sock *pn = pep_sk(sk); |
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u8 data[4] = { PN_PIPE_SB_NEGOTIATED_FC, pep_sb_size(2), pn->tx_fc, pn->rx_fc, }; |
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|
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return pep_indicate(sk, PNS_PIPE_CREATED_IND, 1 /* sub-blocks */, data, 4, GFP_ATOMIC); } |
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|
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static int pep_accept_conn(struct sock *sk, struct sk_buff *skb) { static const u8 data[20] = { PAD, PAD, PAD, 2 /* sub-blocks */, PN_PIPE_SB_REQUIRED_FC_TX, pep_sb_size(5), 3, PAD, PN_MULTI_CREDIT_FLOW_CONTROL, PN_ONE_CREDIT_FLOW_CONTROL, PN_LEGACY_FLOW_CONTROL, PAD, PN_PIPE_SB_PREFERRED_FC_RX, pep_sb_size(5), 3, PAD, PN_MULTI_CREDIT_FLOW_CONTROL, PN_ONE_CREDIT_FLOW_CONTROL, PN_LEGACY_FLOW_CONTROL, PAD, }; might_sleep(); return pep_reply(sk, skb, PN_PIPE_NO_ERROR, data, sizeof(data), GFP_KERNEL); } |
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static int pep_reject_conn(struct sock *sk, struct sk_buff *skb, u8 code, gfp_t priority) |
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{ static const u8 data[4] = { PAD, PAD, PAD, 0 /* sub-blocks */ }; WARN_ON(code == PN_PIPE_NO_ERROR); |
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return pep_reply(sk, skb, code, data, sizeof(data), priority); |
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} /* Control requests are not sent by the pipe service and have a specific * message format. */ |
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static int pep_ctrlreq_error(struct sock *sk, struct sk_buff *oskb, u8 code, gfp_t priority) |
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{ const struct pnpipehdr *oph = pnp_hdr(oskb); struct sk_buff *skb; struct pnpipehdr *ph; struct sockaddr_pn dst; |
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u8 data[4] = { |
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oph->pep_type, /* PEP type */ |
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code, /* error code, at an unusual offset */ PAD, PAD, }; |
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|
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skb = pep_alloc_skb(sk, data, 4, priority); |
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if (!skb) return -ENOMEM; |
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|
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ph = pnp_hdr(skb); |
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ph->utid = oph->utid; ph->message_id = PNS_PEP_CTRL_RESP; ph->pipe_handle = oph->pipe_handle; |
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ph->data0 = oph->data[0]; /* CTRL id */ |
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pn_skb_get_src_sockaddr(oskb, &dst); return pn_skb_send(sk, skb, &dst); } static int pipe_snd_status(struct sock *sk, u8 type, u8 status, gfp_t priority) { |
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u8 data[4] = { type, PAD, PAD, status }; |
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|
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return pep_indicate(sk, PNS_PEP_STATUS_IND, PN_PEP_TYPE_COMMON, data, 4, priority); |
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} /* Send our RX flow control information to the sender. * Socket must be locked. */ |
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static void pipe_grant_credits(struct sock *sk, gfp_t priority) |
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{ struct pep_sock *pn = pep_sk(sk); BUG_ON(sk->sk_state != TCP_ESTABLISHED); switch (pn->rx_fc) { case PN_LEGACY_FLOW_CONTROL: /* TODO */ break; case PN_ONE_CREDIT_FLOW_CONTROL: |
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if (pipe_snd_status(sk, PN_PEP_IND_FLOW_CONTROL, PEP_IND_READY, priority) == 0) pn->rx_credits = 1; |
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break; case PN_MULTI_CREDIT_FLOW_CONTROL: if ((pn->rx_credits + CREDITS_THR) > CREDITS_MAX) break; if (pipe_snd_status(sk, PN_PEP_IND_ID_MCFC_GRANT_CREDITS, CREDITS_MAX - pn->rx_credits, |
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priority) == 0) |
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pn->rx_credits = CREDITS_MAX; break; } } static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); |
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struct pnpipehdr *hdr; |
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int wake = 0; |
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if (!pskb_may_pull(skb, sizeof(*hdr) + 4)) return -EINVAL; |
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hdr = pnp_hdr(skb); |
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if (hdr->pep_type != PN_PEP_TYPE_COMMON) { |
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net_dbg_ratelimited("Phonet unknown PEP type: %u ", |
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(unsigned int)hdr->pep_type); |
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return -EOPNOTSUPP; } |
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switch (hdr->data[0]) { |
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case PN_PEP_IND_FLOW_CONTROL: switch (pn->tx_fc) { case PN_LEGACY_FLOW_CONTROL: |
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switch (hdr->data[3]) { |
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case PEP_IND_BUSY: |
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atomic_set(&pn->tx_credits, 0); |
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break; case PEP_IND_READY: |
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atomic_set(&pn->tx_credits, wake = 1); |
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break; } break; case PN_ONE_CREDIT_FLOW_CONTROL: |
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if (hdr->data[3] == PEP_IND_READY) |
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atomic_set(&pn->tx_credits, wake = 1); |
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break; } break; case PN_PEP_IND_ID_MCFC_GRANT_CREDITS: if (pn->tx_fc != PN_MULTI_CREDIT_FLOW_CONTROL) break; |
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atomic_add(wake = hdr->data[3], &pn->tx_credits); |
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break; default: |
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net_dbg_ratelimited("Phonet unknown PEP indication: %u ", |
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(unsigned int)hdr->data[0]); |
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return -EOPNOTSUPP; } |
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if (wake) |
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sk->sk_write_space(sk); return 0; } static int pipe_rcv_created(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); struct pnpipehdr *hdr = pnp_hdr(skb); |
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u8 n_sb = hdr->data0; |
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pn->rx_fc = pn->tx_fc = PN_LEGACY_FLOW_CONTROL; __skb_pull(skb, sizeof(*hdr)); while (n_sb > 0) { u8 type, buf[2], len = sizeof(buf); u8 *data = pep_get_sb(skb, &type, &len, buf); if (data == NULL) return -EINVAL; switch (type) { case PN_PIPE_SB_NEGOTIATED_FC: if (len < 2 || (data[0] | data[1]) > 3) break; pn->tx_fc = data[0] & 3; pn->rx_fc = data[1] & 3; break; } n_sb--; } return 0; } /* Queue an skb to a connected sock. * Socket lock must be held. */ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); struct pnpipehdr *hdr = pnp_hdr(skb); |
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struct sk_buff_head *queue; |
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int err = 0; BUG_ON(sk->sk_state == TCP_CLOSE_WAIT); switch (hdr->message_id) { case PNS_PEP_CONNECT_REQ: |
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pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE, GFP_ATOMIC); |
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break; case PNS_PEP_DISCONNECT_REQ: pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); sk->sk_state = TCP_CLOSE_WAIT; if (!sock_flag(sk, SOCK_DEAD)) sk->sk_state_change(sk); break; case PNS_PEP_ENABLE_REQ: /* Wait for PNS_PIPE_(ENABLED|REDIRECTED)_IND */ pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); break; case PNS_PEP_RESET_REQ: switch (hdr->state_after_reset) { case PN_PIPE_DISABLE: pn->init_enable = 0; break; case PN_PIPE_ENABLE: pn->init_enable = 1; break; default: /* not allowed to send an error here!? */ err = -EINVAL; goto out; } /* fall through */ case PNS_PEP_DISABLE_REQ: |
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atomic_set(&pn->tx_credits, 0); |
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pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); break; case PNS_PEP_CTRL_REQ: |
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if (skb_queue_len(&pn->ctrlreq_queue) >= PNPIPE_CTRLREQ_MAX) { atomic_inc(&sk->sk_drops); |
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break; |
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} |
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__skb_pull(skb, 4); queue = &pn->ctrlreq_queue; goto queue; |
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|
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case PNS_PIPE_ALIGNED_DATA: __skb_pull(skb, 1); /* fall through */ |
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case PNS_PIPE_DATA: __skb_pull(skb, 3); /* Pipe data header */ if (!pn_flow_safe(pn->rx_fc)) { err = sock_queue_rcv_skb(sk, skb); if (!err) |
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return NET_RX_SUCCESS; err = -ENOBUFS; |
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break; } if (pn->rx_credits == 0) { |
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atomic_inc(&sk->sk_drops); |
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err = -ENOBUFS; break; } pn->rx_credits--; |
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queue = &sk->sk_receive_queue; goto queue; |
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case PNS_PEP_STATUS_IND: pipe_rcv_status(sk, skb); break; case PNS_PIPE_REDIRECTED_IND: err = pipe_rcv_created(sk, skb); break; case PNS_PIPE_CREATED_IND: err = pipe_rcv_created(sk, skb); if (err) break; /* fall through */ case PNS_PIPE_RESET_IND: if (!pn->init_enable) break; /* fall through */ case PNS_PIPE_ENABLED_IND: if (!pn_flow_safe(pn->tx_fc)) { |
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atomic_set(&pn->tx_credits, 1); |
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sk->sk_write_space(sk); } if (sk->sk_state == TCP_ESTABLISHED) break; /* Nothing to do */ sk->sk_state = TCP_ESTABLISHED; |
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pipe_grant_credits(sk, GFP_ATOMIC); |
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break; case PNS_PIPE_DISABLED_IND: sk->sk_state = TCP_SYN_RECV; pn->rx_credits = 0; break; default: |
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net_dbg_ratelimited("Phonet unknown PEP message: %u ", hdr->message_id); |
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err = -EINVAL; } out: kfree_skb(skb); |
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return (err == -ENOBUFS) ? NET_RX_DROP : NET_RX_SUCCESS; |
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queue: skb->dev = NULL; skb_set_owner_r(skb, sk); |
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skb_queue_tail(queue, skb); if (!sock_flag(sk, SOCK_DEAD)) |
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sk->sk_data_ready(sk); |
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return NET_RX_SUCCESS; |
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} /* Destroy connected sock. */ static void pipe_destruct(struct sock *sk) { |
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struct pep_sock *pn = pep_sk(sk); |
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skb_queue_purge(&sk->sk_receive_queue); |
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skb_queue_purge(&pn->ctrlreq_queue); |
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} |
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static u8 pipe_negotiate_fc(const u8 *fcs, unsigned int n) |
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{ |
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unsigned int i; |
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u8 final_fc = PN_NO_FLOW_CONTROL; for (i = 0; i < n; i++) { u8 fc = fcs[i]; if (fc > final_fc && fc < PN_MAX_FLOW_CONTROL) final_fc = fc; } return final_fc; } |
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static int pep_connresp_rcv(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); |
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struct pnpipehdr *hdr; u8 n_sb; if (!pskb_pull(skb, sizeof(*hdr) + 4)) return -EINVAL; hdr = pnp_hdr(skb); |
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if (hdr->error_code != PN_PIPE_NO_ERROR) return -ECONNREFUSED; |
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/* Parse sub-blocks */ |
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n_sb = hdr->data[3]; |
8f44fcc72 Phonet: fix flawe... |
487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 |
while (n_sb > 0) { u8 type, buf[6], len = sizeof(buf); const u8 *data = pep_get_sb(skb, &type, &len, buf); if (data == NULL) return -EINVAL; switch (type) { case PN_PIPE_SB_REQUIRED_FC_TX: if (len < 2 || len < data[0]) break; pn->tx_fc = pipe_negotiate_fc(data + 2, len - 2); break; case PN_PIPE_SB_PREFERRED_FC_RX: if (len < 2 || len < data[0]) break; pn->rx_fc = pipe_negotiate_fc(data + 2, len - 2); break; } n_sb--; } |
b3d625538 Phonet: 'connect'... |
510 |
|
44c9ab16d Phonet: factor co... |
511 |
return pipe_handler_send_created_ind(sk); |
b3d625538 Phonet: 'connect'... |
512 |
} |
297edb600 Phonet: support a... |
513 |
|
bdb6e697b Phonet: set the p... |
514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 |
static int pep_enableresp_rcv(struct sock *sk, struct sk_buff *skb) { struct pnpipehdr *hdr = pnp_hdr(skb); if (hdr->error_code != PN_PIPE_NO_ERROR) return -ECONNREFUSED; return pep_indicate(sk, PNS_PIPE_ENABLED_IND, 0 /* sub-blocks */, NULL, 0, GFP_ATOMIC); } static void pipe_start_flow_control(struct sock *sk) { struct pep_sock *pn = pep_sk(sk); if (!pn_flow_safe(pn->tx_fc)) { atomic_set(&pn->tx_credits, 1); sk->sk_write_space(sk); } pipe_grant_credits(sk, GFP_ATOMIC); } |
297edb600 Phonet: support a... |
536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 |
/* Queue an skb to an actively connected sock. * Socket lock must be held. */ static int pipe_handler_do_rcv(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); struct pnpipehdr *hdr = pnp_hdr(skb); int err = NET_RX_SUCCESS; switch (hdr->message_id) { case PNS_PIPE_ALIGNED_DATA: __skb_pull(skb, 1); /* fall through */ case PNS_PIPE_DATA: __skb_pull(skb, 3); /* Pipe data header */ if (!pn_flow_safe(pn->rx_fc)) { err = sock_queue_rcv_skb(sk, skb); if (!err) return NET_RX_SUCCESS; err = NET_RX_DROP; break; } if (pn->rx_credits == 0) { atomic_inc(&sk->sk_drops); err = NET_RX_DROP; break; } pn->rx_credits--; skb->dev = NULL; skb_set_owner_r(skb, sk); |
297edb600 Phonet: support a... |
566 567 |
skb_queue_tail(&sk->sk_receive_queue, skb); if (!sock_flag(sk, SOCK_DEAD)) |
676d23690 net: Fix use afte... |
568 |
sk->sk_data_ready(sk); |
297edb600 Phonet: support a... |
569 570 571 572 573 574 575 576 577 578 579 |
return NET_RX_SUCCESS; case PNS_PEP_CONNECT_RESP: if (sk->sk_state != TCP_SYN_SENT) break; if (!sock_flag(sk, SOCK_DEAD)) sk->sk_state_change(sk); if (pep_connresp_rcv(sk, skb)) { sk->sk_state = TCP_CLOSE_WAIT; break; } |
bdb6e697b Phonet: set the p... |
580 581 582 583 584 585 586 |
if (pn->init_enable == PN_PIPE_DISABLE) sk->sk_state = TCP_SYN_RECV; else { sk->sk_state = TCP_ESTABLISHED; pipe_start_flow_control(sk); } break; |
297edb600 Phonet: support a... |
587 |
|
bdb6e697b Phonet: set the p... |
588 589 590 591 592 593 594 |
case PNS_PEP_ENABLE_RESP: if (sk->sk_state != TCP_SYN_SENT) break; if (pep_enableresp_rcv(sk, skb)) { sk->sk_state = TCP_CLOSE_WAIT; break; |
297edb600 Phonet: support a... |
595 |
} |
bdb6e697b Phonet: set the p... |
596 597 598 |
sk->sk_state = TCP_ESTABLISHED; pipe_start_flow_control(sk); |
297edb600 Phonet: support a... |
599 600 601 602 603 604 605 606 607 608 609 610 611 |
break; case PNS_PEP_DISCONNECT_RESP: /* sock should already be dead, nothing to do */ break; case PNS_PEP_STATUS_IND: pipe_rcv_status(sk, skb); break; } kfree_skb(skb); return err; } |
b3d625538 Phonet: 'connect'... |
612 |
|
9641458d3 Phonet: Pipe End ... |
613 614 615 616 617 |
/* Listening sock must be locked */ static struct sock *pep_find_pipe(const struct hlist_head *hlist, const struct sockaddr_pn *dst, u8 pipe_handle) { |
9641458d3 Phonet: Pipe End ... |
618 619 |
struct sock *sknode; u16 dobj = pn_sockaddr_get_object(dst); |
b67bfe0d4 hlist: drop the n... |
620 |
sk_for_each(sknode, hlist) { |
9641458d3 Phonet: Pipe End ... |
621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 |
struct pep_sock *pnnode = pep_sk(sknode); /* Ports match, but addresses might not: */ if (pnnode->pn_sk.sobject != dobj) continue; if (pnnode->pipe_handle != pipe_handle) continue; if (sknode->sk_state == TCP_CLOSE_WAIT) continue; sock_hold(sknode); return sknode; } return NULL; } /* * Deliver an skb to a listening sock. * Socket lock must be held. * We then queue the skb to the right connected sock (if any). */ static int pep_do_rcv(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); struct sock *sknode; |
2ddc1ac1b Phonet: do not co... |
646 |
struct pnpipehdr *hdr; |
9641458d3 Phonet: Pipe End ... |
647 |
struct sockaddr_pn dst; |
9641458d3 Phonet: Pipe End ... |
648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 |
u8 pipe_handle; if (!pskb_may_pull(skb, sizeof(*hdr))) goto drop; hdr = pnp_hdr(skb); pipe_handle = hdr->pipe_handle; if (pipe_handle == PN_PIPE_INVALID_HANDLE) goto drop; pn_skb_get_dst_sockaddr(skb, &dst); /* Look for an existing pipe handle */ sknode = pep_find_pipe(&pn->hlist, &dst, pipe_handle); if (sknode) return sk_receive_skb(sknode, skb, 1); |
9641458d3 Phonet: Pipe End ... |
664 665 |
switch (hdr->message_id) { case PNS_PEP_CONNECT_REQ: |
f7ae8d59f Phonet: allocate ... |
666 667 668 669 670 671 672 673 |
if (sk->sk_state != TCP_LISTEN || sk_acceptq_is_full(sk)) { pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE, GFP_ATOMIC); break; } skb_queue_head(&sk->sk_receive_queue, skb); sk_acceptq_added(sk); if (!sock_flag(sk, SOCK_DEAD)) |
676d23690 net: Fix use afte... |
674 |
sk->sk_data_ready(sk); |
f7ae8d59f Phonet: allocate ... |
675 |
return NET_RX_SUCCESS; |
9641458d3 Phonet: Pipe End ... |
676 677 678 679 680 681 |
case PNS_PEP_DISCONNECT_REQ: pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); break; case PNS_PEP_CTRL_REQ: |
c41bd97f8 Phonet: receive p... |
682 |
pep_ctrlreq_error(sk, skb, PN_PIPE_INVALID_HANDLE, GFP_ATOMIC); |
9641458d3 Phonet: Pipe End ... |
683 684 685 686 687 688 |
break; case PNS_PEP_RESET_REQ: case PNS_PEP_ENABLE_REQ: case PNS_PEP_DISABLE_REQ: /* invalid handle is not even allowed here! */ |
0ebbf3186 Phonet: correct p... |
689 |
break; |
297edb600 Phonet: support a... |
690 691 692 693 694 695 |
default: if ((1 << sk->sk_state) & ~(TCPF_CLOSE|TCPF_LISTEN|TCPF_CLOSE_WAIT)) /* actively connected socket */ return pipe_handler_do_rcv(sk, skb); |
9641458d3 Phonet: Pipe End ... |
696 697 698 |
} drop: kfree_skb(skb); |
0ebbf3186 Phonet: correct p... |
699 |
return NET_RX_SUCCESS; |
9641458d3 Phonet: Pipe End ... |
700 |
} |
6482f554e Phonet: remove da... |
701 702 703 704 705 |
static int pipe_do_remove(struct sock *sk) { struct pep_sock *pn = pep_sk(sk); struct pnpipehdr *ph; struct sk_buff *skb; |
44c9ab16d Phonet: factor co... |
706 |
skb = pep_alloc_skb(sk, NULL, 0, GFP_KERNEL); |
6482f554e Phonet: remove da... |
707 708 |
if (!skb) return -ENOMEM; |
6482f554e Phonet: remove da... |
709 710 711 712 |
ph = pnp_hdr(skb); ph->utid = 0; ph->message_id = PNS_PIPE_REMOVE_REQ; ph->pipe_handle = pn->pipe_handle; |
6321aa197 phonet: fix build... |
713 |
ph->data0 = PAD; |
14ba8faeb Phonet: use socke... |
714 |
return pn_skb_send(sk, skb, NULL); |
6482f554e Phonet: remove da... |
715 |
} |
9641458d3 Phonet: Pipe End ... |
716 717 718 719 |
/* associated socket ceases to exist */ static void pep_sock_close(struct sock *sk, long timeout) { struct pep_sock *pn = pep_sk(sk); |
02a47617c Phonet: implement... |
720 |
int ifindex = 0; |
9641458d3 Phonet: Pipe End ... |
721 |
|
e513480e2 Phonet: fix poten... |
722 |
sock_hold(sk); /* keep a reference after sk_common_release() */ |
9641458d3 Phonet: Pipe End ... |
723 724 725 |
sk_common_release(sk); lock_sock(sk); |
f7ae8d59f Phonet: allocate ... |
726 |
if ((1 << sk->sk_state) & (TCPF_SYN_RECV|TCPF_ESTABLISHED)) { |
297edb600 Phonet: support a... |
727 728 729 730 731 732 |
if (sk->sk_backlog_rcv == pipe_do_rcv) /* Forcefully remove dangling Phonet pipe */ pipe_do_remove(sk); else pipe_handler_request(sk, PNS_PEP_DISCONNECT_REQ, PAD, NULL, 0); |
2feb61816 Phonet: remove re... |
733 |
} |
f7ae8d59f Phonet: allocate ... |
734 |
sk->sk_state = TCP_CLOSE; |
b3d625538 Phonet: 'connect'... |
735 |
|
02a47617c Phonet: implement... |
736 737 |
ifindex = pn->ifindex; pn->ifindex = 0; |
9641458d3 Phonet: Pipe End ... |
738 |
release_sock(sk); |
02a47617c Phonet: implement... |
739 740 741 |
if (ifindex) gprs_detach(sk); |
e513480e2 Phonet: fix poten... |
742 |
sock_put(sk); |
9641458d3 Phonet: Pipe End ... |
743 |
} |
cdfbabfb2 net: Work around ... |
744 745 |
static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp, bool kern) |
9641458d3 Phonet: Pipe End ... |
746 |
{ |
f7ae8d59f Phonet: allocate ... |
747 748 749 750 751 752 753 754 755 |
struct pep_sock *pn = pep_sk(sk), *newpn; struct sock *newsk = NULL; struct sk_buff *skb; struct pnpipehdr *hdr; struct sockaddr_pn dst, src; int err; u16 peer_type; u8 pipe_handle, enabled, n_sb; u8 aligned = 0; |
9641458d3 Phonet: Pipe End ... |
756 |
|
f7ae8d59f Phonet: allocate ... |
757 758 759 |
skb = skb_recv_datagram(sk, 0, flags & O_NONBLOCK, errp); if (!skb) return NULL; |
9641458d3 Phonet: Pipe End ... |
760 |
|
f7ae8d59f Phonet: allocate ... |
761 762 763 764 |
lock_sock(sk); if (sk->sk_state != TCP_LISTEN) { err = -EINVAL; goto drop; |
9641458d3 Phonet: Pipe End ... |
765 |
} |
f7ae8d59f Phonet: allocate ... |
766 |
sk_acceptq_removed(sk); |
9641458d3 Phonet: Pipe End ... |
767 |
|
f7ae8d59f Phonet: allocate ... |
768 769 770 |
err = -EPROTO; if (!pskb_may_pull(skb, sizeof(*hdr) + 4)) goto drop; |
9641458d3 Phonet: Pipe End ... |
771 |
|
f7ae8d59f Phonet: allocate ... |
772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 |
hdr = pnp_hdr(skb); pipe_handle = hdr->pipe_handle; switch (hdr->state_after_connect) { case PN_PIPE_DISABLE: enabled = 0; break; case PN_PIPE_ENABLE: enabled = 1; break; default: pep_reject_conn(sk, skb, PN_PIPE_ERR_INVALID_PARAM, GFP_KERNEL); goto drop; } peer_type = hdr->other_pep_type << 8; |
9641458d3 Phonet: Pipe End ... |
787 |
|
f7ae8d59f Phonet: allocate ... |
788 |
/* Parse sub-blocks (options) */ |
6321aa197 phonet: fix build... |
789 |
n_sb = hdr->data[3]; |
f7ae8d59f Phonet: allocate ... |
790 791 792 |
while (n_sb > 0) { u8 type, buf[1], len = sizeof(buf); const u8 *data = pep_get_sb(skb, &type, &len, buf); |
9641458d3 Phonet: Pipe End ... |
793 |
|
f7ae8d59f Phonet: allocate ... |
794 795 796 797 798 799 800 801 802 803 804 805 806 807 |
if (data == NULL) goto drop; switch (type) { case PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE: if (len < 1) goto drop; peer_type = (peer_type & 0xff00) | data[0]; break; case PN_PIPE_SB_ALIGNED_DATA: aligned = data[0] != 0; break; } n_sb--; } |
9641458d3 Phonet: Pipe End ... |
808 |
|
f7ae8d59f Phonet: allocate ... |
809 810 811 812 |
/* Check for duplicate pipe handle */ newsk = pep_find_pipe(&pn->hlist, &dst, pipe_handle); if (unlikely(newsk)) { __sock_put(newsk); |
9641458d3 Phonet: Pipe End ... |
813 |
newsk = NULL; |
f7ae8d59f Phonet: allocate ... |
814 815 |
pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE, GFP_KERNEL); goto drop; |
9641458d3 Phonet: Pipe End ... |
816 |
} |
f7ae8d59f Phonet: allocate ... |
817 |
/* Create a new to-be-accepted sock */ |
cdfbabfb2 net: Work around ... |
818 819 |
newsk = sk_alloc(sock_net(sk), PF_PHONET, GFP_KERNEL, sk->sk_prot, kern); |
f7ae8d59f Phonet: allocate ... |
820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 |
if (!newsk) { pep_reject_conn(sk, skb, PN_PIPE_ERR_OVERLOAD, GFP_KERNEL); err = -ENOBUFS; goto drop; } sock_init_data(NULL, newsk); newsk->sk_state = TCP_SYN_RECV; newsk->sk_backlog_rcv = pipe_do_rcv; newsk->sk_protocol = sk->sk_protocol; newsk->sk_destruct = pipe_destruct; newpn = pep_sk(newsk); pn_skb_get_dst_sockaddr(skb, &dst); pn_skb_get_src_sockaddr(skb, &src); newpn->pn_sk.sobject = pn_sockaddr_get_object(&dst); newpn->pn_sk.dobject = pn_sockaddr_get_object(&src); newpn->pn_sk.resource = pn_sockaddr_get_resource(&dst); |
9641458d3 Phonet: Pipe End ... |
838 |
sock_hold(sk); |
f7ae8d59f Phonet: allocate ... |
839 840 841 842 843 844 845 846 847 848 |
newpn->listener = sk; skb_queue_head_init(&newpn->ctrlreq_queue); newpn->pipe_handle = pipe_handle; atomic_set(&newpn->tx_credits, 0); newpn->ifindex = 0; newpn->peer_type = peer_type; newpn->rx_credits = 0; newpn->rx_fc = newpn->tx_fc = PN_LEGACY_FLOW_CONTROL; newpn->init_enable = enabled; newpn->aligned = aligned; |
9641458d3 Phonet: Pipe End ... |
849 |
|
f7ae8d59f Phonet: allocate ... |
850 851 852 853 854 855 |
err = pep_accept_conn(newsk, skb); if (err) { sock_put(newsk); newsk = NULL; goto drop; } |
9641458d3 Phonet: Pipe End ... |
856 |
sk_add_node(newsk, &pn->hlist); |
f7ae8d59f Phonet: allocate ... |
857 |
drop: |
9641458d3 Phonet: Pipe End ... |
858 |
release_sock(sk); |
f7ae8d59f Phonet: allocate ... |
859 |
kfree_skb(skb); |
9641458d3 Phonet: Pipe End ... |
860 861 862 |
*errp = err; return newsk; } |
b3d625538 Phonet: 'connect'... |
863 864 865 |
static int pep_sock_connect(struct sock *sk, struct sockaddr *addr, int len) { struct pep_sock *pn = pep_sk(sk); |
297edb600 Phonet: support a... |
866 |
int err; |
44c9ab16d Phonet: factor co... |
867 |
u8 data[4] = { 0 /* sub-blocks */, PAD, PAD, PAD }; |
b3d625538 Phonet: 'connect'... |
868 |
|
bdb6e697b Phonet: set the p... |
869 870 |
if (pn->pipe_handle == PN_PIPE_INVALID_HANDLE) pn->pipe_handle = 1; /* anything but INVALID_HANDLE */ |
297edb600 Phonet: support a... |
871 |
err = pipe_handler_request(sk, PNS_PEP_CONNECT_REQ, |
bdb6e697b Phonet: set the p... |
872 |
pn->init_enable, data, 4); |
297edb600 Phonet: support a... |
873 874 875 876 |
if (err) { pn->pipe_handle = PN_PIPE_INVALID_HANDLE; return err; } |
bdb6e697b Phonet: set the p... |
877 |
|
297edb600 Phonet: support a... |
878 |
sk->sk_state = TCP_SYN_SENT; |
bdb6e697b Phonet: set the p... |
879 880 881 882 883 884 885 886 887 888 889 890 891 892 |
return 0; } static int pep_sock_enable(struct sock *sk, struct sockaddr *addr, int len) { int err; err = pipe_handler_request(sk, PNS_PEP_ENABLE_REQ, PAD, NULL, 0); if (err) return err; sk->sk_state = TCP_SYN_SENT; |
297edb600 Phonet: support a... |
893 |
return 0; |
b3d625538 Phonet: 'connect'... |
894 |
} |
b3d625538 Phonet: 'connect'... |
895 |
|
9641458d3 Phonet: Pipe End ... |
896 897 |
static int pep_ioctl(struct sock *sk, int cmd, unsigned long arg) { |
c41bd97f8 Phonet: receive p... |
898 |
struct pep_sock *pn = pep_sk(sk); |
9641458d3 Phonet: Pipe End ... |
899 |
int answ; |
bdb6e697b Phonet: set the p... |
900 |
int ret = -ENOIOCTLCMD; |
9641458d3 Phonet: Pipe End ... |
901 902 903 |
switch (cmd) { case SIOCINQ: |
bdb6e697b Phonet: set the p... |
904 905 906 907 |
if (sk->sk_state == TCP_LISTEN) { ret = -EINVAL; break; } |
9641458d3 Phonet: Pipe End ... |
908 909 |
lock_sock(sk); |
f64f9e719 net: Move && and ... |
910 911 |
if (sock_flag(sk, SOCK_URGINLINE) && !skb_queue_empty(&pn->ctrlreq_queue)) |
c41bd97f8 Phonet: receive p... |
912 913 |
answ = skb_peek(&pn->ctrlreq_queue)->len; else if (!skb_queue_empty(&sk->sk_receive_queue)) |
9641458d3 Phonet: Pipe End ... |
914 915 916 917 |
answ = skb_peek(&sk->sk_receive_queue)->len; else answ = 0; release_sock(sk); |
bdb6e697b Phonet: set the p... |
918 919 920 921 922 923 924 925 926 927 928 929 930 |
ret = put_user(answ, (int __user *)arg); break; case SIOCPNENABLEPIPE: lock_sock(sk); if (sk->sk_state == TCP_SYN_SENT) ret = -EBUSY; else if (sk->sk_state == TCP_ESTABLISHED) ret = -EISCONN; else ret = pep_sock_enable(sk, NULL, 0); release_sock(sk); break; |
9641458d3 Phonet: Pipe End ... |
931 |
} |
bdb6e697b Phonet: set the p... |
932 |
return ret; |
9641458d3 Phonet: Pipe End ... |
933 934 935 936 937 |
} static int pep_init(struct sock *sk) { struct pep_sock *pn = pep_sk(sk); |
f7ae8d59f Phonet: allocate ... |
938 |
sk->sk_destruct = pipe_destruct; |
9641458d3 Phonet: Pipe End ... |
939 |
INIT_HLIST_HEAD(&pn->hlist); |
297edb600 Phonet: support a... |
940 |
pn->listener = NULL; |
c41bd97f8 Phonet: receive p... |
941 |
skb_queue_head_init(&pn->ctrlreq_queue); |
297edb600 Phonet: support a... |
942 943 944 |
atomic_set(&pn->tx_credits, 0); pn->ifindex = 0; pn->peer_type = 0; |
9641458d3 Phonet: Pipe End ... |
945 |
pn->pipe_handle = PN_PIPE_INVALID_HANDLE; |
297edb600 Phonet: support a... |
946 947 948 949 |
pn->rx_credits = 0; pn->rx_fc = pn->tx_fc = PN_LEGACY_FLOW_CONTROL; pn->init_enable = 1; pn->aligned = 0; |
9641458d3 Phonet: Pipe End ... |
950 951 |
return 0; } |
02a47617c Phonet: implement... |
952 |
static int pep_setsockopt(struct sock *sk, int level, int optname, |
b7058842c net: Make setsock... |
953 |
char __user *optval, unsigned int optlen) |
02a47617c Phonet: implement... |
954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 |
{ struct pep_sock *pn = pep_sk(sk); int val = 0, err = 0; if (level != SOL_PNPIPE) return -ENOPROTOOPT; if (optlen >= sizeof(int)) { if (get_user(val, (int __user *) optval)) return -EFAULT; } lock_sock(sk); switch (optname) { case PNPIPE_ENCAP: if (val && val != PNPIPE_ENCAP_IP) { err = -EINVAL; break; } if (!pn->ifindex == !val) break; /* Nothing to do! */ if (!capable(CAP_NET_ADMIN)) { err = -EPERM; break; } if (val) { release_sock(sk); err = gprs_attach(sk); if (err > 0) { pn->ifindex = err; err = 0; } } else { pn->ifindex = 0; release_sock(sk); gprs_detach(sk); err = 0; } goto out_norel; |
03789f267 Phonet: cleanup p... |
992 |
|
bdb6e697b Phonet: set the p... |
993 994 995 996 997 998 999 1000 1001 1002 1003 |
case PNPIPE_HANDLE: if ((sk->sk_state == TCP_CLOSE) && (val >= 0) && (val < PN_PIPE_INVALID_HANDLE)) pn->pipe_handle = val; else err = -EINVAL; break; case PNPIPE_INITSTATE: pn->init_enable = !!val; break; |
02a47617c Phonet: implement... |
1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 |
default: err = -ENOPROTOOPT; } release_sock(sk); out_norel: return err; } static int pep_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { struct pep_sock *pn = pep_sk(sk); int len, val; if (level != SOL_PNPIPE) return -ENOPROTOOPT; if (get_user(len, optlen)) return -EFAULT; switch (optname) { case PNPIPE_ENCAP: val = pn->ifindex ? PNPIPE_ENCAP_IP : PNPIPE_ENCAP_NONE; break; |
8d98efa84 Phonet: Implement... |
1028 |
|
03789f267 Phonet: cleanup p... |
1029 1030 1031 |
case PNPIPE_IFINDEX: val = pn->ifindex; break; |
acaf7df61 Phonet: provide p... |
1032 1033 1034 1035 1036 |
case PNPIPE_HANDLE: val = pn->pipe_handle; if (val == PN_PIPE_INVALID_HANDLE) return -EINVAL; break; |
bdb6e697b Phonet: set the p... |
1037 1038 1039 |
case PNPIPE_INITSTATE: val = pn->init_enable; break; |
02a47617c Phonet: implement... |
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 |
default: return -ENOPROTOOPT; } len = min_t(unsigned int, sizeof(int), len); if (put_user(len, optlen)) return -EFAULT; if (put_user(val, (int __user *) optval)) return -EFAULT; return 0; } static int pipe_skb_send(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); struct pnpipehdr *ph; |
e1a5964f0 Phonet: restore f... |
1056 |
int err; |
02a47617c Phonet: implement... |
1057 |
|
be677730a Phonet: use atomi... |
1058 1059 1060 1061 1062 |
if (pn_flow_safe(pn->tx_fc) && !atomic_add_unless(&pn->tx_credits, -1, 0)) { kfree_skb(skb); return -ENOBUFS; } |
fea93ecef Phonet: zero-copy... |
1063 |
skb_push(skb, 3 + pn->aligned); |
02a47617c Phonet: implement... |
1064 1065 1066 |
skb_reset_transport_header(skb); ph = pnp_hdr(skb); ph->utid = 0; |
fea93ecef Phonet: zero-copy... |
1067 1068 |
if (pn->aligned) { ph->message_id = PNS_PIPE_ALIGNED_DATA; |
6321aa197 phonet: fix build... |
1069 |
ph->data0 = 0; /* padding */ |
fea93ecef Phonet: zero-copy... |
1070 1071 |
} else ph->message_id = PNS_PIPE_DATA; |
02a47617c Phonet: implement... |
1072 |
ph->pipe_handle = pn->pipe_handle; |
14ba8faeb Phonet: use socke... |
1073 |
err = pn_skb_send(sk, skb, NULL); |
e1a5964f0 Phonet: restore f... |
1074 1075 1076 1077 |
if (err && pn_flow_safe(pn->tx_fc)) atomic_inc(&pn->tx_credits); return err; |
02a47617c Phonet: implement... |
1078 |
} |
1b7841404 net: Remove iocb ... |
1079 |
static int pep_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) |
9641458d3 Phonet: Pipe End ... |
1080 1081 |
{ struct pep_sock *pn = pep_sk(sk); |
b1704374f Phonet: allocate ... |
1082 |
struct sk_buff *skb; |
9641458d3 Phonet: Pipe End ... |
1083 1084 1085 |
long timeo; int flags = msg->msg_flags; int err, done; |
bcf1b70ac phonet: Check inp... |
1086 1087 |
if (len > USHRT_MAX) return -EMSGSIZE; |
82ecbcb9c Phonet: reject un... |
1088 1089 1090 |
if ((msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL| MSG_CMSG_COMPAT)) || !(msg->msg_flags & MSG_EOR)) |
9641458d3 Phonet: Pipe End ... |
1091 |
return -EOPNOTSUPP; |
b1704374f Phonet: allocate ... |
1092 1093 1094 |
skb = sock_alloc_send_skb(sk, MAX_PNPIPE_HEADER + len, flags & MSG_DONTWAIT, &err); if (!skb) |
02ac3268a Phonet: correct s... |
1095 |
return err; |
b1704374f Phonet: allocate ... |
1096 |
|
638be3445 Phonet: fix align... |
1097 |
skb_reserve(skb, MAX_PHONET_HEADER + 3 + pn->aligned); |
6ce8e9ce5 new helper: memcp... |
1098 |
err = memcpy_from_msg(skb_put(skb, len), msg, len); |
b1704374f Phonet: allocate ... |
1099 1100 |
if (err < 0) goto outfree; |
9641458d3 Phonet: Pipe End ... |
1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 |
lock_sock(sk); timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); if ((1 << sk->sk_state) & (TCPF_LISTEN|TCPF_CLOSE)) { err = -ENOTCONN; goto out; } if (sk->sk_state != TCP_ESTABLISHED) { /* Wait until the pipe gets to enabled state */ disabled: err = sk_stream_wait_connect(sk, &timeo); if (err) goto out; if (sk->sk_state == TCP_CLOSE_WAIT) { err = -ECONNRESET; goto out; } } BUG_ON(sk->sk_state != TCP_ESTABLISHED); /* Wait until flow control allows TX */ |
be677730a Phonet: use atomi... |
1122 |
done = atomic_read(&pn->tx_credits); |
9641458d3 Phonet: Pipe End ... |
1123 |
while (!done) { |
d9dc8b0f8 net: fix sleeping... |
1124 |
DEFINE_WAIT_FUNC(wait, woken_wake_function); |
9641458d3 Phonet: Pipe End ... |
1125 1126 1127 1128 1129 1130 1131 1132 1133 |
if (!timeo) { err = -EAGAIN; goto out; } if (signal_pending(current)) { err = sock_intr_errno(timeo); goto out; } |
d9dc8b0f8 net: fix sleeping... |
1134 1135 1136 |
add_wait_queue(sk_sleep(sk), &wait); done = sk_wait_event(sk, &timeo, atomic_read(&pn->tx_credits), &wait); remove_wait_queue(sk_sleep(sk), &wait); |
9641458d3 Phonet: Pipe End ... |
1137 1138 1139 1140 |
if (sk->sk_state != TCP_ESTABLISHED) goto disabled; } |
02a47617c Phonet: implement... |
1141 |
err = pipe_skb_send(sk, skb); |
9641458d3 Phonet: Pipe End ... |
1142 1143 1144 1145 1146 |
if (err >= 0) err = len; /* success! */ skb = NULL; out: release_sock(sk); |
b1704374f Phonet: allocate ... |
1147 |
outfree: |
9641458d3 Phonet: Pipe End ... |
1148 1149 1150 |
kfree_skb(skb); return err; } |
02a47617c Phonet: implement... |
1151 1152 1153 |
int pep_writeable(struct sock *sk) { struct pep_sock *pn = pep_sk(sk); |
be677730a Phonet: use atomi... |
1154 |
return atomic_read(&pn->tx_credits); |
02a47617c Phonet: implement... |
1155 1156 1157 1158 1159 1160 |
} int pep_write(struct sock *sk, struct sk_buff *skb) { struct sk_buff *rskb, *fs; int flen = 0; |
fea93ecef Phonet: zero-copy... |
1161 1162 |
if (pep_sk(sk)->aligned) return pipe_skb_send(sk, skb); |
02a47617c Phonet: implement... |
1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 |
rskb = alloc_skb(MAX_PNPIPE_HEADER, GFP_ATOMIC); if (!rskb) { kfree_skb(skb); return -ENOMEM; } skb_shinfo(rskb)->frag_list = skb; rskb->len += skb->len; rskb->data_len += rskb->len; rskb->truesize += rskb->len; /* Avoid nested fragments */ |
5c313e9a7 phonet: Use frag ... |
1174 |
skb_walk_frags(skb, fs) |
02a47617c Phonet: implement... |
1175 1176 |
flen += fs->len; skb->next = skb_shinfo(skb)->frag_list; |
5c313e9a7 phonet: Use frag ... |
1177 |
skb_frag_list_init(skb); |
02a47617c Phonet: implement... |
1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 |
skb->len -= flen; skb->data_len -= flen; skb->truesize -= flen; skb_reserve(rskb, MAX_PHONET_HEADER + 3); return pipe_skb_send(sk, rskb); } struct sk_buff *pep_read(struct sock *sk) { struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue); if (sk->sk_state == TCP_ESTABLISHED) |
44c9ab16d Phonet: factor co... |
1191 |
pipe_grant_credits(sk, GFP_ATOMIC); |
02a47617c Phonet: implement... |
1192 1193 |
return skb; } |
1b7841404 net: Remove iocb ... |
1194 1195 |
static int pep_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock, int flags, int *addr_len) |
9641458d3 Phonet: Pipe End ... |
1196 1197 1198 |
{ struct sk_buff *skb; int err; |
82ecbcb9c Phonet: reject un... |
1199 1200 1201 |
if (flags & ~(MSG_OOB|MSG_PEEK|MSG_TRUNC|MSG_DONTWAIT|MSG_WAITALL| MSG_NOSIGNAL|MSG_CMSG_COMPAT)) return -EOPNOTSUPP; |
9641458d3 Phonet: Pipe End ... |
1202 1203 |
if (unlikely(1 << sk->sk_state & (TCPF_LISTEN | TCPF_CLOSE))) return -ENOTCONN; |
c41bd97f8 Phonet: receive p... |
1204 1205 1206 |
if ((flags & MSG_OOB) || sock_flag(sk, SOCK_URGINLINE)) { /* Dequeue and acknowledge control request */ struct pep_sock *pn = pep_sk(sk); |
82ecbcb9c Phonet: reject un... |
1207 1208 |
if (flags & MSG_PEEK) return -EOPNOTSUPP; |
c41bd97f8 Phonet: receive p... |
1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 |
skb = skb_dequeue(&pn->ctrlreq_queue); if (skb) { pep_ctrlreq_error(sk, skb, PN_PIPE_NO_ERROR, GFP_KERNEL); msg->msg_flags |= MSG_OOB; goto copy; } if (flags & MSG_OOB) return -EINVAL; } |
9641458d3 Phonet: Pipe End ... |
1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 |
skb = skb_recv_datagram(sk, flags, noblock, &err); lock_sock(sk); if (skb == NULL) { if (err == -ENOTCONN && sk->sk_state == TCP_CLOSE_WAIT) err = -ECONNRESET; release_sock(sk); return err; } if (sk->sk_state == TCP_ESTABLISHED) |
44c9ab16d Phonet: factor co... |
1229 |
pipe_grant_credits(sk, GFP_KERNEL); |
9641458d3 Phonet: Pipe End ... |
1230 |
release_sock(sk); |
c41bd97f8 Phonet: receive p... |
1231 |
copy: |
9641458d3 Phonet: Pipe End ... |
1232 |
msg->msg_flags |= MSG_EOR; |
9641458d3 Phonet: Pipe End ... |
1233 1234 1235 1236 |
if (skb->len > len) msg->msg_flags |= MSG_TRUNC; else len = skb->len; |
51f3d02b9 net: Add and use ... |
1237 |
err = skb_copy_datagram_msg(skb, 0, msg, len); |
9641458d3 Phonet: Pipe End ... |
1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 |
if (!err) err = (flags & MSG_TRUNC) ? skb->len : len; skb_free_datagram(sk, skb); return err; } static void pep_sock_unhash(struct sock *sk) { struct pep_sock *pn = pep_sk(sk); struct sock *skparent = NULL; lock_sock(sk); |
b3d625538 Phonet: 'connect'... |
1251 |
|
297edb600 Phonet: support a... |
1252 |
if (pn->listener != NULL) { |
9641458d3 Phonet: Pipe End ... |
1253 |
skparent = pn->listener; |
297edb600 Phonet: support a... |
1254 |
pn->listener = NULL; |
9641458d3 Phonet: Pipe End ... |
1255 |
release_sock(sk); |
9641458d3 Phonet: Pipe End ... |
1256 |
pn = pep_sk(skparent); |
7dfde179c Phonet: listening... |
1257 1258 1259 |
lock_sock(skparent); sk_del_node_init(sk); sk = skparent; |
9641458d3 Phonet: Pipe End ... |
1260 |
} |
297edb600 Phonet: support a... |
1261 |
|
9641458d3 Phonet: Pipe End ... |
1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 |
/* Unhash a listening sock only when it is closed * and all of its active connected pipes are closed. */ if (hlist_empty(&pn->hlist)) pn_sock_unhash(&pn->pn_sk.sk); release_sock(sk); if (skparent) sock_put(skparent); } static struct proto pep_proto = { .close = pep_sock_close, .accept = pep_sock_accept, |
b3d625538 Phonet: 'connect'... |
1275 |
.connect = pep_sock_connect, |
9641458d3 Phonet: Pipe End ... |
1276 1277 |
.ioctl = pep_ioctl, .init = pep_init, |
02a47617c Phonet: implement... |
1278 1279 |
.setsockopt = pep_setsockopt, .getsockopt = pep_getsockopt, |
9641458d3 Phonet: Pipe End ... |
1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 |
.sendmsg = pep_sendmsg, .recvmsg = pep_recvmsg, .backlog_rcv = pep_do_rcv, .hash = pn_sock_hash, .unhash = pep_sock_unhash, .get_port = pn_sock_get_port, .obj_size = sizeof(struct pep_sock), .owner = THIS_MODULE, .name = "PNPIPE", }; |
548ec1147 net: phonet: mark... |
1290 |
static const struct phonet_protocol pep_pn_proto = { |
9641458d3 Phonet: Pipe End ... |
1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 |
.ops = &phonet_stream_ops, .prot = &pep_proto, .sock_type = SOCK_SEQPACKET, }; static int __init pep_register(void) { return phonet_proto_register(PN_PROTO_PIPE, &pep_pn_proto); } static void __exit pep_unregister(void) { phonet_proto_unregister(PN_PROTO_PIPE, &pep_pn_proto); } module_init(pep_register); module_exit(pep_unregister); MODULE_AUTHOR("Remi Denis-Courmont, Nokia"); MODULE_DESCRIPTION("Phonet pipe protocol"); MODULE_LICENSE("GPL"); MODULE_ALIAS_NET_PF_PROTO(PF_PHONET, PN_PROTO_PIPE); |