Mercurial > hg > quicktun

annotate src/common.c @ 61:66d9d80215f0

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Fixed -h and -v return status, fixed source file permissions (thanks github.com/rotty)
author Ivo Smits <Ivo@UFO-Net.nl>
date Wed, 04 Jan 2017 21:42:38 +0100
parents 2f4d333f7500
children fa4983c5f7ea
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1 /* Copyright 2010 Ivo Smits <Ivo@UCIS.nl>. All rights reserved.
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2 Redistribution and use in source and binary forms, with or without modification, are
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3 permitted provided that the following conditions are met:
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4
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5 1. Redistributions of source code must retain the above copyright notice, this list of
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6 conditions and the following disclaimer.
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7
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8 2. Redistributions in binary form must reproduce the above copyright notice, this list
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9 of conditions and the following disclaimer in the documentation and/or other materials
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10 provided with the distribution.
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11
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12 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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13 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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14 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
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15 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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16 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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17 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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18 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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19 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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20 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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21
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22 The views and conclusions contained in the software and documentation are those of the
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23 authors and should not be interpreted as representing official policies, either expressed
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24 or implied, of Ivo Smits.*/
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25
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26 #include <stdio.h>
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27 #include <stdlib.h>
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28 #include <string.h>
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29 #include <fcntl.h>
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30 #include <unistd.h>
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31 #include <pwd.h>
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32 #include <grp.h>
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33 #ifndef HAVE_NETINET_IN_H
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34 #include <netinet/in.h>
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35 #endif
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36 #include <sys/ioctl.h>
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37 #include <sys/socket.h>
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38 #include <poll.h>
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39 #include <netdb.h>
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40 #include <stdlib.h>
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41 #include <arpa/inet.h>
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42 #include <net/if.h>
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43 #ifdef linux
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44 #include <linux/if_tun.h>
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45 #include <linux/if_ether.h>
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46 #else
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47 #define ETH_FRAME_LEN 1514
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48 #include <net/if_tun.h>
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49 #ifdef SOLARIS
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50 #include <sys/stropts.h>
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51 #include <sys/sockio.h>
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52 #endif
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53 #endif
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54
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55 #define MAX_PACKET_LEN (ETH_FRAME_LEN+4) //Some space for optional packet information
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56
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57 typedef union {
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58 struct sockaddr any;
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59 struct sockaddr_in ip4;
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60 struct sockaddr_in6 ip6;
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61 } sockaddr_any;
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62
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63 struct qtsession;
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64 struct qtproto {
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65 int encrypted;
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66 int buffersize_raw;
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67 int buffersize_enc;
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68 int offset_raw;
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69 int offset_enc;
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70 int (*encode)(struct qtsession* sess, char* raw, char* enc, int len);
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71 int (*decode)(struct qtsession* sess, char* enc, char* raw, int len);
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72 int (*init)(struct qtsession* sess);
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73 int protocol_data_size;
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74 void (*idle)(struct qtsession* sess);
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75 };
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76 struct qtsession {
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77 struct qtproto protocol;
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78 void* protocol_data;
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79 int fd_socket;
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80 int fd_dev;
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81 int remote_float;
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82 sockaddr_any remote_addr;
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83 int use_pi;
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84 int poll_timeout;
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85 void (*sendnetworkpacket)(struct qtsession* sess, char* msg, int len);
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86 };
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87
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88 #ifdef COMBINED_BINARY
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89 extern char* (*getconf)(const char*);
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90 extern int errorexit(const char*);
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91 extern int errorexitp(const char*);
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92 extern void print_header();
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93 extern void hex2bin(unsigned char*, const char*, const int);
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94 extern int debug;
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95 extern int qtrun(struct qtproto* p);
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96 extern int qtprocessargs(int argc, char** argv);
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97 #else
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98
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99 char* (*getconf)(const char*) = getenv;
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100 int debug = 0;
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101 static int gargc = 0;
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102 static char** gargv = NULL;
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103
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104 int errorexit(const char* text) {
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105 fprintf(stderr, "%s\n", text);
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106 return -1;
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107 }
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108 int errorexit2(const char* text, const char* error) {
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109 fprintf(stderr, "%s: %s\n", text, error);
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110 return -1;
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111 }
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112 int errorexitp(const char* text) {
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113 perror(text);
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114 return -1;
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115 }
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116
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117 void print_header() {
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118 fprintf(stderr, "UCIS QuickTun "QT_VERSION" (c) 2010-2017 Ivo Smits <Ivo@UCIS.nl>\n");
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119 fprintf(stderr, "More information: http://wiki.ucis.nl/QuickTun\n");
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120 }
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121
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122 static int is_all_zero(void* buf, int size) {
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123 int i;
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124 char* bb = (char*)buf;
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125 for (i = 0; i < size; i++) if (bb[i] != 0) return 0;
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126 return 1;
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127 }
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128 static int sockaddr_is_zero_address(sockaddr_any* sa) {
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129 int af = sa->any.sa_family;
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130 if (af == AF_INET) return is_all_zero(&sa->ip4.sin_addr, sizeof(struct in_addr));
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131 if (af == AF_INET6) return is_all_zero(&sa->ip6.sin6_addr, sizeof(struct in6_addr));
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132 return is_all_zero(sa, sizeof(sockaddr_any));
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133 }
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134 static int sockaddr_set_port(sockaddr_any* sa, int port) {
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135 port = htons(port);
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136 int af = sa->any.sa_family;
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137 if (af == AF_INET) sa->ip4.sin_port = port;
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138 else if (af == AF_INET6) sa->ip6.sin6_port = port;
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139 else return errorexit("Unknown address family");
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140 return 0;
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141 }
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142 static int sockaddr_equal(sockaddr_any* a, sockaddr_any* b) {
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143 if (a->any.sa_family != b->any.sa_family) return 0;
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144 if (a->any.sa_family == AF_INET) return a->ip4.sin_port == b->ip4.sin_port && a->ip4.sin_addr.s_addr == b->ip4.sin_addr.s_addr;
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145 if (a->any.sa_family == AF_INET6) return a->ip6.sin6_port == b->ip6.sin6_port && memcmp(&a->ip6.sin6_addr, &b->ip6.sin6_addr, sizeof(struct in6_addr)) == 0 && a->ip6.sin6_scope_id == b->ip6.sin6_scope_id;
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146 return memcmp(a, b, sizeof(sockaddr_any)) == 0;
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147 }
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148 static void sockaddr_to_string(sockaddr_any* sa, char* str, int strbuflen) {
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149 if (sa->any.sa_family == AF_INET) {
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150 if (!inet_ntop(AF_INET, &sa->ip4.sin_addr, str, strbuflen)) str[0] = 0;
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151 int i = strlen(str);
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152 snprintf(str + i, strbuflen - i, ":%u", ntohs(sa->ip4.sin_port));
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153 } else if (sa->any.sa_family == AF_INET6) {
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154 if (!inet_ntop(AF_INET6, &sa->ip6.sin6_addr, str, strbuflen)) str[0] = 0;
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
155 int i = strlen(str);
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
156 snprintf(str + i, strbuflen - i, "%%%d:%u", sa->ip6.sin6_scope_id, ntohs(sa->ip6.sin6_port));
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
157 } else {
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
158 strncpy(str, "Unknown AF", strbuflen);
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
159 }
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
160 str[strbuflen - 1] = 0;
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
161 }
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
162
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
163 static int init_udp(struct qtsession* session) {
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
164 char* envval;
6
cf9b44b46be5 Use stderr for output instead of stdout, added debugging code to nacltai
root <root@Really.UFO-Net.nl>
parents: 4
diff changeset
165 fprintf(stderr, "Initializing UDP socket...\n");
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
166 struct addrinfo *ai_local = NULL, *ai_remote = NULL;
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
167 unsigned short af = 0;
52
3115f8af98bb Added support for libsodium, fixed bug in USE_PI compatibility mode, improved timestamp checking in nacltai protocol
Ivo Smits <Ivo@UCIS.nl>
parents: 49
diff changeset
168 int ret;
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
169 if ((envval = getconf("LOCAL_ADDRESS"))) {
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
170 if ((ret = getaddrinfo(envval, NULL, NULL, &ai_local))) return errorexit2("getaddrinfo(LOCAL_ADDRESS)", gai_strerror(ret));
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
171 if (!ai_local) return errorexit("LOCAL_ADDRESS lookup failed");
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
172 if (ai_local->ai_addrlen > sizeof(sockaddr_any)) return errorexit("Resolved LOCAL_ADDRESS is too big");
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
173 af = ai_local->ai_family;
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
174 }
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
175 if ((envval = getconf("REMOTE_ADDRESS"))) {
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
176 if ((ret = getaddrinfo(envval, NULL, NULL, &ai_remote))) return errorexit2("getaddrinfo(REMOTE_ADDRESS)", gai_strerror(ret));
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
177 if (!ai_remote) return errorexit("REMOTE_ADDRESS lookup failed");
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
178 if (ai_remote->ai_addrlen > sizeof(sockaddr_any)) return errorexit("Resolved REMOTE_ADDRESS is too big");
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
179 if (af && af != ai_remote->ai_family) return errorexit("Address families do not match");
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
180 af = ai_remote->ai_family;
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
181 }
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
182 if (!af) af = AF_INET;
57
4c083d81f5a8 Fixes for OpenBSD (thanks to Pi <pi-quicktun@mrtheplague.net> and SeekingFor)
Ivo Smits <Ivo@UCIS.nl>
parents: 55
diff changeset
183 int sa_size = sizeof(sockaddr_any);
4c083d81f5a8 Fixes for OpenBSD (thanks to Pi <pi-quicktun@mrtheplague.net> and SeekingFor)
Ivo Smits <Ivo@UCIS.nl>
parents: 55
diff changeset
184 if (af == AF_INET) sa_size = sizeof(struct sockaddr_in);
4c083d81f5a8 Fixes for OpenBSD (thanks to Pi <pi-quicktun@mrtheplague.net> and SeekingFor)
Ivo Smits <Ivo@UCIS.nl>
parents: 55
diff changeset
185 else if (af == AF_INET6) sa_size = sizeof(struct sockaddr_in6);
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
186 int sfd = socket(af, SOCK_DGRAM, IPPROTO_UDP);
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
187 if (sfd < 0) return errorexitp("Could not create UDP socket");
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
188 sockaddr_any udpaddr;
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
189 memset(&udpaddr, 0, sizeof(udpaddr));
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
190 udpaddr.any.sa_family = af;
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
191 if (ai_local) memcpy(&udpaddr, ai_local->ai_addr, ai_local->ai_addrlen);
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
192 int port = 2998;
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
193 if ((envval = getconf("LOCAL_PORT"))) port = atoi(envval);
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
194 if (sockaddr_set_port(&udpaddr, port)) return -1;
57
4c083d81f5a8 Fixes for OpenBSD (thanks to Pi <pi-quicktun@mrtheplague.net> and SeekingFor)
Ivo Smits <Ivo@UCIS.nl>
parents: 55
diff changeset
195 if (bind(sfd, &udpaddr.any, sa_size)) return errorexitp("Could not bind socket");
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
196 memset(&udpaddr, 0, sizeof(udpaddr));
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
197 udpaddr.any.sa_family = af;
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
198 if (ai_remote) memcpy(&udpaddr, ai_remote->ai_addr, ai_remote->ai_addrlen);
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
199 if (!ai_remote || sockaddr_is_zero_address(&udpaddr)) {
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
200 session->remote_float = 1;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
201 } else {
12
e4b60d041491 Make sure that the session buffer is zero
Ivo Smits <Ivo@UCIS.nl>
parents: 9
diff changeset
202 session->remote_float = getconf("REMOTE_FLOAT") ? 1 : 0;
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
203 port = 2998;
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
204 if ((envval = getconf("REMOTE_PORT"))) port = atoi(envval);
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
205 if (sockaddr_set_port(&udpaddr, port)) return -1;
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
206 session->remote_addr = udpaddr;
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
207 if (session->remote_float) {
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
208 session->remote_float = 2;
2
b2c7c83a1dda Accept 0.0.0.0 remote address for float mode
ivo <ivo@UFO-Net.nl>
parents: 0
diff changeset
209 } else {
57
4c083d81f5a8 Fixes for OpenBSD (thanks to Pi <pi-quicktun@mrtheplague.net> and SeekingFor)
Ivo Smits <Ivo@UCIS.nl>
parents: 55
diff changeset
210 if (connect(sfd, &udpaddr.any, sa_size)) return errorexitp("Could not connect socket");
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
211 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
212 }
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
213 if (ai_local) freeaddrinfo(ai_local);
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
214 if (ai_remote) freeaddrinfo(ai_remote);
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
215 session->fd_socket = sfd;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
216 return sfd;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
217 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
218
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
219 static int init_tuntap(struct qtsession* session) {
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
220 char* envval;
7
fd7c60905b13 BSD support
ivo <Ivo@UCIS.nl>
parents: 6
diff changeset
221 fprintf(stderr, "Initializing tun/tap device...\n");
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
222 int ttfd; //Tap device file descriptor
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
223 int tunmode = 0;
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
224 if ((envval = getconf("TUN_MODE"))) tunmode = atoi(envval);
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
225 session->use_pi = 0;
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
226 if (tunmode && (envval = getconf("USE_PI"))) session->use_pi = atoi(envval);
54
4ff8003d0973 Fix for OpenBSD tun/tap initialization
Ivo Smits <Ivo@UCIS.nl>
parents: 52
diff changeset
227 #if defined(__linux__)
15
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
228 struct ifreq ifr; //required for tun/tap setup
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
229 memset(&ifr, 0, sizeof(ifr));
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
230 if ((ttfd = open("/dev/net/tun", O_RDWR)) < 0) return errorexitp("Could not open tun/tap device file");
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
231 if ((envval = getconf("INTERFACE"))) strcpy(ifr.ifr_name, envval);
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
232 ifr.ifr_flags = tunmode ? IFF_TUN : IFF_TAP;
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
233 if (!session->use_pi) ifr.ifr_flags |= IFF_NO_PI;
15
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
234 if (ioctl(ttfd, TUNSETIFF, (void *)&ifr) < 0) return errorexitp("TUNSETIFF ioctl failed");
32
51c6d2fc712f Fixes contributed by Daniel Dickinson <daniel@cshore.neomailbox.net>
Ivo Smits <Ivo@UCIS.nl>
parents: 30
diff changeset
235 #elif defined SOLARIS
13
f7e0145d8e2a solaris support
Gabor Adam Toth <tg@tgbit.net>
parents: 12
diff changeset
236 int ip_fd = -1, if_fd = -1, ppa = 0;
15
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
237 if ((ttfd = open("/dev/tun", O_RDWR)) < 0) return errorexitp("Could not open tun device file");
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
238 if ((ip_fd = open("/dev/ip", O_RDWR, 0)) < 0) return errorexitp("Could not open /dev/ip");
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
239 if ((envval = getconf("INTERFACE"))) {
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
240 while (*envval && !isdigit((int)*envval)) envval++;
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
241 ppa = atoi(envval);
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
242 }
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
243 if ((ppa = ioctl(ttfd, TUNNEWPPA, ppa)) < 0) return errorexitp("Could not assign new PPA");
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
244 if ((if_fd = open("/dev/tun", O_RDWR, 0)) < 0) return errorexitp("Could not open tun device file again");
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
245 if (ioctl(if_fd, I_PUSH, "ip") < 0) return errorexitp("Could not push IP module");
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
246 if (ioctl(if_fd, IF_UNITSEL, (char *)&ppa) < 0) return errorexitp("Could not set PPA");
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
247 if (ioctl(ip_fd, I_LINK, if_fd) < 0) return errorexitp("Could not link TUN device to IP");
7
fd7c60905b13 BSD support
ivo <Ivo@UCIS.nl>
parents: 6
diff changeset
248 #else
15
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
249 if (!(envval = getconf("INTERFACE"))) envval = "/dev/tun0";
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
250 if ((ttfd = open(envval, O_RDWR)) < 0) return errorexitp("Could not open tun device file");
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
251 if (tunmode) {
33
422f3582bd38 Possible fix for tun mode on FreeBSD
Ivo Smits <Ivo@UCIS.nl>
parents: 32
diff changeset
252 int i = IFF_POINTOPOINT | IFF_MULTICAST;
34
b876afa5a72a Fixed the build script and FreeBSD tun mode
Ivo Smits <Ivo@UCIS.nl>
parents: 33
diff changeset
253 ioctl(ttfd, TUNSIFMODE, &i);
54
4ff8003d0973 Fix for OpenBSD tun/tap initialization
Ivo Smits <Ivo@UCIS.nl>
parents: 52
diff changeset
254 #if defined(__OpenBSD__)
4ff8003d0973 Fix for OpenBSD tun/tap initialization
Ivo Smits <Ivo@UCIS.nl>
parents: 52
diff changeset
255 if (!session->use_pi) session->use_pi = 2;
4ff8003d0973 Fix for OpenBSD tun/tap initialization
Ivo Smits <Ivo@UCIS.nl>
parents: 52
diff changeset
256 #else
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
257 i = session->use_pi ? 1 : 0;
34
b876afa5a72a Fixed the build script and FreeBSD tun mode
Ivo Smits <Ivo@UCIS.nl>
parents: 33
diff changeset
258 ioctl(ttfd, TUNSIFHEAD, &i);
54
4ff8003d0973 Fix for OpenBSD tun/tap initialization
Ivo Smits <Ivo@UCIS.nl>
parents: 52
diff changeset
259 #endif
33
422f3582bd38 Possible fix for tun mode on FreeBSD
Ivo Smits <Ivo@UCIS.nl>
parents: 32
diff changeset
260 }
15
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
261 #endif
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
262 if ((envval = getconf("TUN_UP_SCRIPT"))) system(envval);
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
263 session->fd_dev = ttfd;
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
264 return ttfd;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
265 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
266
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
267 void hex2bin(unsigned char* dest, const char* src, const int count) {
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
268 int i;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
269 for (i = 0; i < count; i++) {
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
270 if (*src >= '0' && *src <= '9') *dest = *src - '0';
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
271 else if (*src >= 'a' && * src <='f') *dest = *src - 'a' + 10;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
272 else if (*src >= 'A' && * src <='F') *dest = *src - 'A' + 10;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
273 src++; *dest = *dest << 4;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
274 if (*src >= '0' && *src <= '9') *dest += *src - '0';
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
275 else if (*src >= 'a' && *src <= 'f') *dest += *src - 'a' + 10;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
276 else if (*src >= 'A' && *src <= 'F') *dest += *src - 'A' + 10;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
277 src++; dest++;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
278 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
279 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
280
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
281 static int drop_privileges() {
36
1fe62a94c28a Added option SETUID to drop privileges
Ivo Smits <Ivo@UCIS.nl>
parents: 35
diff changeset
282 char* envval;
49
b4de2326e9f7 Added chroot support
Ivo Smits <Ivo@UCIS.nl>
parents: 47
diff changeset
283 struct passwd *pw = NULL;
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
284 if ((envval = getconf("SETUID"))) {
49
b4de2326e9f7 Added chroot support
Ivo Smits <Ivo@UCIS.nl>
parents: 47
diff changeset
285 pw = getpwnam(envval);
b4de2326e9f7 Added chroot support
Ivo Smits <Ivo@UCIS.nl>
parents: 47
diff changeset
286 if (!pw) return errorexitp("getpwnam");
b4de2326e9f7 Added chroot support
Ivo Smits <Ivo@UCIS.nl>
parents: 47
diff changeset
287 }
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
288 if ((envval = getconf("CHROOT"))) {
49
b4de2326e9f7 Added chroot support
Ivo Smits <Ivo@UCIS.nl>
parents: 47
diff changeset
289 if (chroot(envval)) return errorexitp("chroot");
b4de2326e9f7 Added chroot support
Ivo Smits <Ivo@UCIS.nl>
parents: 47
diff changeset
290 if (chdir("/")) return errorexitp("chdir /");
b4de2326e9f7 Added chroot support
Ivo Smits <Ivo@UCIS.nl>
parents: 47
diff changeset
291 }
b4de2326e9f7 Added chroot support
Ivo Smits <Ivo@UCIS.nl>
parents: 47
diff changeset
292 if (pw) {
36
1fe62a94c28a Added option SETUID to drop privileges
Ivo Smits <Ivo@UCIS.nl>
parents: 35
diff changeset
293 if (setgroups(0, NULL) == -1) return errorexitp("setgroups");
1fe62a94c28a Added option SETUID to drop privileges
Ivo Smits <Ivo@UCIS.nl>
parents: 35
diff changeset
294 if (setgid(pw->pw_gid) == -1) return errorexitp("setgid");
1fe62a94c28a Added option SETUID to drop privileges
Ivo Smits <Ivo@UCIS.nl>
parents: 35
diff changeset
295 if (setuid(pw->pw_uid) == -1) return errorexitp("setuid");
1fe62a94c28a Added option SETUID to drop privileges
Ivo Smits <Ivo@UCIS.nl>
parents: 35
diff changeset
296 }
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
297 return 0;
36
1fe62a94c28a Added option SETUID to drop privileges
Ivo Smits <Ivo@UCIS.nl>
parents: 35
diff changeset
298 }
1fe62a94c28a Added option SETUID to drop privileges
Ivo Smits <Ivo@UCIS.nl>
parents: 35
diff changeset
299
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
300 static void qtsendnetworkpacket(struct qtsession* session, char* msg, int len) {
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
301 if (session->remote_float == 0) {
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
302 len = write(session->fd_socket, msg, len);
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
303 } else if (session->remote_float == 2) {
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
304 len = sendto(session->fd_socket, msg, len, 0, (struct sockaddr*)&session->remote_addr, sizeof(sockaddr_any));
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
305 }
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
306 }
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
307
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
308 int qtrun(struct qtproto* p) {
22
38d495566d1c Re-added some debugging messages to nacltai protocol code, enabled by the DEBUG environment variable
Ivo Smits <Ivo@UCIS.nl>
parents: 15
diff changeset
309 if (getconf("DEBUG")) debug = 1;
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
310 struct qtsession session;
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
311 session.poll_timeout = -1;
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
312 session.protocol = *p;
6
cf9b44b46be5 Use stderr for output instead of stdout, added debugging code to nacltai
root <root@Really.UFO-Net.nl>
parents: 4
diff changeset
313
29
7c5e5be876bb Small fix to error handling during initialization
Ivo Smits <Ivo@UCIS.nl>
parents: 28
diff changeset
314 if (init_udp(&session) < 0) return -1;
6
cf9b44b46be5 Use stderr for output instead of stdout, added debugging code to nacltai
root <root@Really.UFO-Net.nl>
parents: 4
diff changeset
315 int sfd = session.fd_socket;
cf9b44b46be5 Use stderr for output instead of stdout, added debugging code to nacltai
root <root@Really.UFO-Net.nl>
parents: 4
diff changeset
316
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
317 session.sendnetworkpacket = qtsendnetworkpacket;
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
318
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
319 if (init_tuntap(&session) < 0) return -1;
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
320 int ttfd = session.fd_dev;
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
321
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
322 char protocol_data[p->protocol_data_size];
12
e4b60d041491 Make sure that the session buffer is zero
Ivo Smits <Ivo@UCIS.nl>
parents: 9
diff changeset
323 memset(protocol_data, 0, p->protocol_data_size);
57
4c083d81f5a8 Fixes for OpenBSD (thanks to Pi <pi-quicktun@mrtheplague.net> and SeekingFor)
Ivo Smits <Ivo@UCIS.nl>
parents: 55
diff changeset
324 session.protocol_data = protocol_data;
27
5ba185ca7102 Fixed error checking during initialization, restructured code a bit to make it even simpler
Ivo Smits <Ivo@UCIS.nl>
parents: 22
diff changeset
325 if (p->init && p->init(&session) < 0) return -1;
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
326
36
1fe62a94c28a Added option SETUID to drop privileges
Ivo Smits <Ivo@UCIS.nl>
parents: 35
diff changeset
327 if (drop_privileges() < 0) return -1;
1fe62a94c28a Added option SETUID to drop privileges
Ivo Smits <Ivo@UCIS.nl>
parents: 35
diff changeset
328
6
cf9b44b46be5 Use stderr for output instead of stdout, added debugging code to nacltai
root <root@Really.UFO-Net.nl>
parents: 4
diff changeset
329 fprintf(stderr, "The tunnel is now operational!\n");
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
330
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
331 struct pollfd fds[2];
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
332 fds[0].fd = ttfd;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
333 fds[0].events = POLLIN;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
334 fds[1].fd = sfd;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
335 fds[1].events = POLLIN;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
336
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
337 int pi_length = 0;
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
338 if (session.use_pi == 2) pi_length = 4;
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
339
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
340 char buffer_raw_a[p->buffersize_raw + pi_length];
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
341 char buffer_enc_a[p->buffersize_enc];
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
342 char* buffer_raw = buffer_raw_a;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
343 char* buffer_enc = buffer_enc_a;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
344
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
345 while (1) {
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
346 int len = poll(fds, 2, session.poll_timeout);
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
347 if (len < 0) return errorexitp("poll error");
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
348 else if (fds[0].revents & (POLLERR | POLLHUP | POLLNVAL)) return errorexit("poll error on tap device");
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
349 else if (fds[1].revents & (POLLHUP | POLLNVAL)) return errorexit("poll error on udp socket");
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
350 if (len == 0 && p->idle) p->idle(&session);
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
351 if (fds[0].revents & POLLIN) {
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
352 len = read(ttfd, buffer_raw + p->offset_raw, p->buffersize_raw + pi_length);
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
353 if (len < pi_length) errorexit("read packet smaller than header from tun device");
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
354 if (session.remote_float == 0 || session.remote_float == 2) {
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
355 len = p->encode(&session, buffer_raw + pi_length, buffer_enc, len - pi_length);
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
356 if (len < 0) return len;
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
357 if (len == 0) continue; //encoding is not yet possible
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
358 qtsendnetworkpacket(&session, buffer_enc + p->offset_enc, len);
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
359 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
360 }
15
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
361 if (fds[1].revents & POLLERR) {
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
362 int out;
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
363 socklen_t slen = sizeof(out);
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
364 getsockopt(sfd, SOL_SOCKET, SO_ERROR, &out, &slen);
15
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
365 fprintf(stderr, "Received error %d on udp socket\n", out);
1fa5b5fa49e1 Fixed a race condition caused by reception of ICMP errors
Ivo Smits <Ivo@UCIS.nl>
parents: 13
diff changeset
366 }
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
367 if (fds[1].revents & POLLIN) {
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
368 sockaddr_any recvaddr;
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
369 socklen_t recvaddr_len = sizeof(recvaddr);
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
370 if (session.remote_float == 0) {
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
371 len = read(sfd, buffer_enc + p->offset_enc, p->buffersize_enc);
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
372 } else {
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
373 len = recvfrom(sfd, buffer_enc + p->offset_enc, p->buffersize_enc, 0, (struct sockaddr*)&recvaddr, &recvaddr_len);
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
374 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
375 if (len < 0) {
59
2f4d333f7500 Fix SO_ERROR ouput type
Andreas Rottmann <a.rottmann@gmx.at>
parents: 57
diff changeset
376 int out;
55
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
377 socklen_t slen = sizeof(out);
5685fad38195 Fixed compiler warnings from clang (including small bug in private key loading)
Ivo Smits <Ivo@UCIS.nl>
parents: 54
diff changeset
378 getsockopt(sfd, SOL_SOCKET, SO_ERROR, &out, &slen);
59
2f4d333f7500 Fix SO_ERROR ouput type
Andreas Rottmann <a.rottmann@gmx.at>
parents: 57
diff changeset
379 fprintf(stderr, "Received end of file on udp socket (error %d)\n", out);
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
380 } else {
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
381 len = p->decode(&session, buffer_enc, buffer_raw + pi_length, len);
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
382 if (len < 0) continue;
47
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
383 if (session.remote_float != 0 && !sockaddr_equal(&session.remote_addr, &recvaddr)) {
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
384 char epname[INET6_ADDRSTRLEN + 1 + 2 + 1 + 5]; //addr%scope:port
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
385 sockaddr_to_string(&recvaddr, epname, sizeof(epname));
e896392f7e03 Added support for connecting over IPv6
Ivo Smits <Ivo@UCIS.nl>
parents: 41
diff changeset
386 fprintf(stderr, "Remote endpoint has changed to %s\n", epname);
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
387 session.remote_addr = recvaddr;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
388 session.remote_float = 2;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
389 }
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
390 if (len > 0 && session.use_pi == 2) {
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
391 int ipver = (buffer_raw[p->offset_raw + pi_length] >> 4) & 0xf;
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
392 int pihdr = 0;
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
393 #if defined linux
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
394 if (ipver == 4) pihdr = 0x0000 | (0x0008 << 16); //little endian: flags and protocol are swapped
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
395 else if (ipver == 6) pihdr = 0x0000 | (0xdd86 << 16);
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
396 #else
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
397 if (ipver == 4) pihdr = htonl(AF_INET);
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
398 else if (ipver == 6) pihdr = htonl(AF_INET6);
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
399 #endif
52
3115f8af98bb Added support for libsodium, fixed bug in USE_PI compatibility mode, improved timestamp checking in nacltai protocol
Ivo Smits <Ivo@UCIS.nl>
parents: 49
diff changeset
400 *(int*)(buffer_raw + p->offset_raw) = pihdr;
35
a1ec0d6b6f13 Added USE_PI=2 setting to automatically add/remove packet information header
Ivo Smits <Ivo@UCIS.nl>
parents: 34
diff changeset
401 }
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
402 if (len > 0) write(ttfd, buffer_raw + p->offset_raw, len + pi_length);
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
403 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
404 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
405 }
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
406 return 0;
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
407 }
38
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
408
41
54d28a81ca99 Small updates in preparation for stateful protocols
Ivo Smits <Ivo@UCIS.nl>
parents: 39
diff changeset
409 static char* getconfcmdargs(const char* name) {
38
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
410 int i;
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
411 for (i = 1; i < gargc - 2; i++) {
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
412 if (strcmp(gargv[i], "-c")) continue;
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
413 if (strcmp(gargv[i + 1], name)) continue;
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
414 return gargv[i + 2];
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
415 }
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
416 return NULL;
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
417 }
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
418
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
419 int qtprocessargs(int argc, char** argv) {
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
420 int i;
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
421 for (i = 1; i < argc; i++) {
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
422 char* a = argv[i];
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
423 if (!strcmp(a, "-h") || !strcmp(a, "--help")) {
61
66d9d80215f0 Fixed -h and -v return status, fixed source file permissions (thanks github.com/rotty)
Ivo Smits <Ivo@UFO-Net.nl>
parents: 59
diff changeset
424 printf("Please read the documentation at http://wiki.ucis.nl/QuickTun\n");
66d9d80215f0 Fixed -h and -v return status, fixed source file permissions (thanks github.com/rotty)
Ivo Smits <Ivo@UFO-Net.nl>
parents: 59
diff changeset
425 return 0;
38
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
426 } else if (!strcmp(a, "-v") || !strcmp(a, "--version")) {
61
66d9d80215f0 Fixed -h and -v return status, fixed source file permissions (thanks github.com/rotty)
Ivo Smits <Ivo@UFO-Net.nl>
parents: 59
diff changeset
427 printf("UCIS QuickTun "QT_VERSION"\n");
66d9d80215f0 Fixed -h and -v return status, fixed source file permissions (thanks github.com/rotty)
Ivo Smits <Ivo@UFO-Net.nl>
parents: 59
diff changeset
428 return 0;
38
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
429 } else if (!strcmp(a, "-c")) {
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
430 gargc = argc;
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
431 gargv = argv;
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
432 getconf = getconfcmdargs;
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
433 i += 2;
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
434 } else {
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
435 return errorexit("Unexpected command line argument");
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
436 }
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
437 }
61
66d9d80215f0 Fixed -h and -v return status, fixed source file permissions (thanks github.com/rotty)
Ivo Smits <Ivo@UFO-Net.nl>
parents: 59
diff changeset
438 return 1;
38
d9f5caa13898 Added support for NetBSD, added command line parsing to provide configuration options
Ivo Smits <Ivo@UCIS.nl>
parents: 36
diff changeset
439 }
0
65c01f57bdce Initial commit
ivo <ivo@UFO-Net.nl>
parents:
diff changeset
440 #endif
30
6f0e6b7dc088 Fixed build script to support multiple abis on one machine, bugfix in code, minor improvements
Ivo Smits <Ivo@UCIS.nl>
parents: 29
diff changeset
441