FreeCalypso > hg > themwi-system-sw
annotate sip-manual-out/sip_udp.c @ 217:9f6a148ceb25
tcpserv-dump: brown paper bag
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 24 Jul 2023 22:33:01 -0800 |
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1 /* |
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2 * In this module we implement our UDP socket for SIP, |
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3 * and the associated lowest-level protocol handling. |
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4 */ |
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5 |
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6 #include <sys/types.h> |
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7 #include <sys/socket.h> |
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8 #include <netinet/in.h> |
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9 #include <stdio.h> |
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10 #include <stdlib.h> |
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11 #include <string.h> |
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12 #include <strings.h> |
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13 #include <unistd.h> |
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14 #include "../libsip/parse.h" |
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15 #include "../libsip/out_msg.h" |
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16 |
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17 extern struct in_addr sip_bind_ip; |
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18 extern unsigned sip_bind_port; |
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19 |
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20 int sip_socket; |
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21 |
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22 open_sip_udp_socket() |
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23 { |
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24 struct sockaddr_in sin; |
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25 int rc; |
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26 |
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27 sip_socket = socket(AF_INET, SOCK_DGRAM, 0); |
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28 if (sip_socket < 0) { |
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29 perror("socket(AF_INET, SOCK_DGRAM, 0)"); |
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30 exit(1); |
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31 } |
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32 sin.sin_family = AF_INET; |
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33 sin.sin_addr = sip_bind_ip; |
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34 sin.sin_port = htons(sip_bind_port); |
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35 rc = bind(sip_socket, (struct sockaddr *) &sin, sizeof sin); |
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36 if (rc < 0) { |
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37 perror("bind of SIP UDP socket"); |
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38 exit(1); |
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39 } |
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40 return(0); |
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41 } |
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42 |
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43 void |
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44 sip_socket_select() |
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45 { |
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46 struct sip_pkt_rx pkt; |
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47 struct sockaddr_in sin; |
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48 socklen_t addrlen; |
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49 int rc; |
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50 |
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51 addrlen = sizeof sin; |
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52 rc = recvfrom(sip_socket, pkt.pkt_buffer, MAX_SIP_RX_PACKET, 0, |
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53 (struct sockaddr *) &sin, &addrlen); |
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54 if (rc <= 0) { |
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55 perror("recvfrom"); |
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56 return; |
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57 } |
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58 pkt.pkt_length = rc; |
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59 log_sip_msg_rx(pkt.pkt_buffer, pkt.pkt_length, &sin); |
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60 rc = parse_incoming_sip_msg(&pkt); |
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61 if (rc < 0) { |
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62 printf("Incoming SIP UDP message parse error %d\n", rc); |
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63 return; |
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64 } |
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65 /* dispatch good-so-far SIP message */ |
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66 if (pkt.parse_msgtype == SIP_MSG_TYPE_REQ) |
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67 process_sip_request(&pkt, &sin); |
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68 else if (pkt.parse_msgtype == SIP_MSG_TYPE_RESP) |
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69 process_sip_response(&pkt, &sin); |
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70 } |
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71 |
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72 void |
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73 sip_tx_packet(msg, sin) |
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74 struct sip_msg_out *msg; |
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75 struct sockaddr_in *sin; |
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76 { |
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77 socklen_t addrlen; |
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78 |
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79 addrlen = sizeof(struct sockaddr_in); |
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80 sendto(sip_socket, msg->buf, msg->msg_len, 0, (struct sockaddr *) sin, |
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81 addrlen); |
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82 log_sip_msg_tx(msg->buf, msg->msg_len, sin); |
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83 } |