| James Kuszmaul | 82f6c04 | 2021-01-17 11:30:16 -0800 | [diff] [blame^] | 1 | /** |
| 2 | * @file ack.c SIP Session ACK |
| 3 | * |
| 4 | * Copyright (C) 2010 Creytiv.com |
| 5 | */ |
| 6 | #include <re_types.h> |
| 7 | #include <re_mem.h> |
| 8 | #include <re_mbuf.h> |
| 9 | #include <re_sa.h> |
| 10 | #include <re_list.h> |
| 11 | #include <re_hash.h> |
| 12 | #include <re_fmt.h> |
| 13 | #include <re_uri.h> |
| 14 | #include <re_tmr.h> |
| 15 | #include <re_msg.h> |
| 16 | #include <re_sip.h> |
| 17 | #include <re_sipsess.h> |
| 18 | #include "sipsess.h" |
| 19 | |
| 20 | |
| 21 | struct sipsess_ack { |
| 22 | struct le he; |
| 23 | struct tmr tmr; |
| 24 | struct sa dst; |
| 25 | struct sip_request *req; |
| 26 | struct sip_dialog *dlg; |
| 27 | struct mbuf *mb; |
| 28 | enum sip_transp tp; |
| 29 | uint32_t cseq; |
| 30 | }; |
| 31 | |
| 32 | |
| 33 | static void destructor(void *arg) |
| 34 | { |
| 35 | struct sipsess_ack *ack = arg; |
| 36 | |
| 37 | hash_unlink(&ack->he); |
| 38 | tmr_cancel(&ack->tmr); |
| 39 | mem_deref(ack->req); |
| 40 | mem_deref(ack->dlg); |
| 41 | mem_deref(ack->mb); |
| 42 | } |
| 43 | |
| 44 | |
| 45 | static void tmr_handler(void *arg) |
| 46 | { |
| 47 | struct sipsess_ack *ack = arg; |
| 48 | |
| 49 | mem_deref(ack); |
| 50 | } |
| 51 | |
| 52 | |
| 53 | static int send_handler(enum sip_transp tp, const struct sa *src, |
| 54 | const struct sa *dst, struct mbuf *mb, void *arg) |
| 55 | { |
| 56 | struct sipsess_ack *ack = arg; |
| 57 | (void)src; |
| 58 | |
| 59 | mem_deref(ack->mb); |
| 60 | ack->mb = mem_ref(mb); |
| 61 | ack->dst = *dst; |
| 62 | ack->tp = tp; |
| 63 | |
| 64 | tmr_start(&ack->tmr, 64 * SIP_T1, tmr_handler, ack); |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | |
| 70 | static void resp_handler(int err, const struct sip_msg *msg, void *arg) |
| 71 | { |
| 72 | struct sipsess_ack *ack = arg; |
| 73 | (void)err; |
| 74 | (void)msg; |
| 75 | |
| 76 | mem_deref(ack); |
| 77 | } |
| 78 | |
| 79 | |
| 80 | int sipsess_ack(struct sipsess_sock *sock, struct sip_dialog *dlg, |
| 81 | uint32_t cseq, struct sip_auth *auth, |
| 82 | const char *ctype, struct mbuf *desc) |
| 83 | { |
| 84 | struct sipsess_ack *ack; |
| 85 | int err; |
| 86 | |
| 87 | ack = mem_zalloc(sizeof(*ack), destructor); |
| 88 | if (!ack) |
| 89 | return ENOMEM; |
| 90 | |
| 91 | hash_append(sock->ht_ack, |
| 92 | hash_joaat_str(sip_dialog_callid(dlg)), |
| 93 | &ack->he, ack); |
| 94 | |
| 95 | ack->dlg = mem_ref(dlg); |
| 96 | ack->cseq = cseq; |
| 97 | |
| 98 | err = sip_drequestf(&ack->req, sock->sip, false, "ACK", dlg, cseq, |
| 99 | auth, send_handler, resp_handler, ack, |
| 100 | "%s%s%s" |
| 101 | "Content-Length: %zu\r\n" |
| 102 | "\r\n" |
| 103 | "%b", |
| 104 | desc ? "Content-Type: " : "", |
| 105 | desc ? ctype : "", |
| 106 | desc ? "\r\n" : "", |
| 107 | desc ? mbuf_get_left(desc) : (size_t)0, |
| 108 | desc ? mbuf_buf(desc) : NULL, |
| 109 | desc ? mbuf_get_left(desc) : (size_t)0); |
| 110 | if (err) |
| 111 | goto out; |
| 112 | |
| 113 | out: |
| 114 | if (err) |
| 115 | mem_deref(ack); |
| 116 | |
| 117 | return err; |
| 118 | } |
| 119 | |
| 120 | |
| 121 | static bool cmp_handler(struct le *le, void *arg) |
| 122 | { |
| 123 | struct sipsess_ack *ack = le->data; |
| 124 | const struct sip_msg *msg = arg; |
| 125 | |
| 126 | if (!sip_dialog_cmp(ack->dlg, msg)) |
| 127 | return false; |
| 128 | |
| 129 | if (ack->cseq != msg->cseq.num) |
| 130 | return false; |
| 131 | |
| 132 | return true; |
| 133 | } |
| 134 | |
| 135 | |
| 136 | int sipsess_ack_again(struct sipsess_sock *sock, const struct sip_msg *msg) |
| 137 | { |
| 138 | struct sipsess_ack *ack; |
| 139 | |
| 140 | ack = list_ledata(hash_lookup(sock->ht_ack, |
| 141 | hash_joaat_pl(&msg->callid), |
| 142 | cmp_handler, (void *)msg)); |
| 143 | if (!ack) |
| 144 | return ENOENT; |
| 145 | |
| 146 | return sip_send(sock->sip, NULL, ack->tp, &ack->dst, ack->mb); |
| 147 | } |