FreeCalypso > hg > freecalypso-tools

annotate rvinterf/lowlevel/localsock.c @ 1011:6d9b10633f10 default tip

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etmsync Pirelli IMEI retrieval: fix poor use of printf() Bug reported by Vadim Yanitskiy <fixeria@osmocom.org>: the construct where a static-allocated string was passed to printf() without any format arguments causes newer compilers to report a security problem. Given that formatted output is not needed here, just fixed string output, change printf() to fputs(), and direct the error message to stderr while at it.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 23 May 2024 17:29:57 +0000
parents e7502631a0f9
children
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0
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This rvinterf module handles the local UNIX domain socket interface
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3 */
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4
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5 #include <sys/types.h>
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Mychaela Falconia <falcon@freecalypso.org>
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6 #include <sys/socket.h>
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Mychaela Falconia <falcon@freecalypso.org>
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7 #include <sys/un.h>
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8 #include <stdio.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include <stdlib.h>
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12 #include <unistd.h>
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Mychaela Falconia <falcon@freecalypso.org>
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13 #include "../include/localsock.h"
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Mychaela Falconia <falcon@freecalypso.org>
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14 #include "client.h"
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15
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16 int listener;
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17
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18 extern struct client *client_head;
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19 extern int max_fd;
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20 extern char *socket_pathname;
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21 extern int socketpair_fd;
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22
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23 create_listener_socket()
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24 {
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25 /* local socket binding voodoo copied from osmocon */
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26 struct sockaddr_un local;
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27 unsigned int namelen;
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28 int rc;
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29
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30 listener = socket(AF_UNIX, SOCK_STREAM, 0);
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31 if (listener < 0) {
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32 perror("socket(AF_UNIX, SOCK_STREAM, 0)");
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33 exit(1);
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34 }
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35
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36 local.sun_family = AF_UNIX;
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37 strncpy(local.sun_path, socket_pathname, sizeof(local.sun_path));
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38 local.sun_path[sizeof(local.sun_path) - 1] = '\0';
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39 unlink(local.sun_path);
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40
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41 /* we use the same magic that X11 uses in Xtranssock.c for
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Mychaela Falconia <falcon@freecalypso.org>
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42 * calculating the proper length of the sockaddr */
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43 #if defined(BSD44SOCKETS) || defined(__UNIXWARE__)
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44 local.sun_len = strlen(local.sun_path);
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45 #endif
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46 #if defined(BSD44SOCKETS) || defined(SUN_LEN)
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47 namelen = SUN_LEN(&local);
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48 #else
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49 namelen = strlen(local.sun_path) +
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50 offsetof(struct sockaddr_un, sun_path) + 1;
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51 #endif
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52
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53 rc = bind(listener, (struct sockaddr *) &local, namelen);
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54 if (rc != 0) {
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55 perror("bind on local socket");
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56 exit(1);
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57 }
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58 rc = listen(listener, 3);
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59 if (rc != 0) {
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60 perror("listen");
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61 exit(1);
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62 }
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63
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64 if (listener > max_fd)
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65 max_fd = listener;
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66 return(0);
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67 }
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68
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69 static void
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70 prep_for_length_rx(cli)
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71 struct client *cli;
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72 {
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73 cli->rx_state = 0;
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74 cli->rx_ptr = cli->rx_buf;
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75 cli->rx_left = 2;
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76 }
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77
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78 static void
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79 prep_for_message_rx(cli)
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80 struct client *cli;
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81 {
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82 cli->rx_state = 1;
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83 cli->rx_ptr = cli->rx_buf;
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84 cli->rx_left = cli->rx_msglen;
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85 }
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86
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87 handle_listener_select()
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88 {
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89 struct sockaddr_un un_addr;
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90 socklen_t len;
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Mychaela Falconia <falcon@freecalypso.org>
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91 int rc;
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Mychaela Falconia <falcon@freecalypso.org>
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92 struct client *newcli;
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93
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94 len = sizeof(un_addr);
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95 rc = accept(listener, (struct sockaddr *) &un_addr, &len);
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96 if (rc < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
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97 perror("rvinterf: accept");
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98 exit(1);
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99 }
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100 if (rc > max_fd)
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101 max_fd = rc;
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102 newcli = malloc(sizeof(struct client));
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103 if (!newcli) {
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104 perror("rvinterf: malloc for new client");
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105 exit(1);
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106 }
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107 bzero(newcli, sizeof(struct client));
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Mychaela Falconia <falcon@freecalypso.org>
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108 newcli->fd = rc;
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Mychaela Falconia <falcon@freecalypso.org>
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109 newcli->next = client_head;
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Mychaela Falconia <falcon@freecalypso.org>
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110 client_head = newcli;
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Mychaela Falconia <falcon@freecalypso.org>
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111 prep_for_length_rx(newcli);
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Mychaela Falconia <falcon@freecalypso.org>
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112 output_line("*** Client program connected");
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Mychaela Falconia <falcon@freecalypso.org>
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113 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
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114 }
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115
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Mychaela Falconia <falcon@freecalypso.org>
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116 create_socketpair_client()
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Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
117 {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 struct client *cli;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 if (socketpair_fd > max_fd)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 max_fd = socketpair_fd;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 cli = malloc(sizeof(struct client));
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 if (!cli) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 perror("rvinterf: malloc for socketpair client");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 exit(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 bzero(cli, sizeof(struct client));
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 cli->fd = socketpair_fd;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 client_head = cli;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 prep_for_length_rx(cli);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 return(0);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 send_local_msg_to_client(cli, msg)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 struct client *cli;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 char *msg;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 int len, len1;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 u_char hdr[3];
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 len = strlen(msg);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 len1 = len + 1;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 hdr[0] = len1 >> 8;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 hdr[1] = len1 & 0xFF;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 hdr[2] = RVI2CLI_LOCAL_CMD_RESP;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 write(cli->fd, hdr, 3);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 write(cli->fd, msg, len);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 void
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 handle_client_select(cli)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 struct client *cli;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 int cc;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 cc = read(cli->fd, cli->rx_ptr, cli->rx_left);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 if (cc <= 0) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 /* normal client exit condition */
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 output_line("*** Client program disconnected");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 close_socket: cli->rx_state = 2;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 cli->rx_ptr += cc;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 cli->rx_left -= cc;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 if (cli->rx_left)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 /* got the thing, process it */
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 if (cli->rx_state) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 prep_for_length_rx(cli);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 process_msg_from_client(cli);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 } else {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 cli->rx_msglen = cli->rx_buf[0] << 8 | cli->rx_buf[1];
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 if (cli->rx_msglen < 1 || cli->rx_msglen > LOCALSOCK_MAX_MSG) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 send_local_msg_to_client(cli,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 "-Invalid length, closing socket");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 goto close_socket;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 prep_for_message_rx(cli);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 }