1: /* $Id: upnputils.c,v 1.1.1.1 2023/09/27 11:25:11 misho Exp $ */
2: /* MiniUPnP project
3: * http://miniupnp.free.fr/ or https://miniupnp.tuxfamily.org/
4: * (c) 2006-2019 Thomas Bernard
5: * This software is subject to the conditions detailed
6: * in the LICENCE file provided within the distribution */
7:
8: #include "config.h"
9:
10: #include <stdio.h>
11: #include <string.h>
12: #include <syslog.h>
13: #include <unistd.h>
14: #include <fcntl.h>
15: #include <sys/types.h>
16: #include <sys/socket.h>
17: #include <netinet/in.h>
18: #include <arpa/inet.h>
19: #ifdef AF_LINK
20: #include <net/if_dl.h>
21: #endif
22: #include <time.h>
23: #include <sys/time.h>
24:
25: #include "upnputils.h"
26: #include "getroute.h"
27: #include "minissdpdtypes.h"
28:
29: extern struct lan_addr_list lan_addrs;
30:
31: int
32: sockaddr_to_string(const struct sockaddr * addr, char * str, size_t size)
33: {
34: char buffer[64];
35: unsigned short port = 0;
36: int n = -1;
37:
38: switch(addr->sa_family)
39: {
40: case AF_INET6:
41: inet_ntop(addr->sa_family,
42: &((struct sockaddr_in6 *)addr)->sin6_addr,
43: buffer, sizeof(buffer));
44: port = ntohs(((struct sockaddr_in6 *)addr)->sin6_port);
45: n = snprintf(str, size, "[%s]:%hu", buffer, port);
46: break;
47: case AF_INET:
48: inet_ntop(addr->sa_family,
49: &((struct sockaddr_in *)addr)->sin_addr,
50: buffer, sizeof(buffer));
51: port = ntohs(((struct sockaddr_in *)addr)->sin_port);
52: n = snprintf(str, size, "%s:%hu", buffer, port);
53: break;
54: #ifdef AF_LINK
55: #if defined(__sun)
56: /* solaris does not seem to have link_ntoa */
57: /* #define link_ntoa _link_ntoa */
58: #define link_ntoa(x) "dummy-link_ntoa"
59: #endif
60: case AF_LINK:
61: {
62: struct sockaddr_dl * sdl = (struct sockaddr_dl *)addr;
63: n = snprintf(str, size, "index=%hu type=%d %s",
64: sdl->sdl_index, sdl->sdl_type,
65: link_ntoa(sdl));
66: }
67: break;
68: #endif
69: default:
70: n = snprintf(str, size, "unknown address family %d", addr->sa_family);
71: #if 0
72: n = snprintf(str, size, "unknown address family %d "
73: "%02x %02x %02x %02x %02x %02x %02x %02x",
74: addr->sa_family,
75: addr->sa_data[0], addr->sa_data[1], (unsigned)addr->sa_data[2], addr->sa_data[3],
76: addr->sa_data[4], addr->sa_data[5], (unsigned)addr->sa_data[6], addr->sa_data[7]);
77: #endif
78: }
79: return n;
80: }
81:
82:
83: int
84: set_non_blocking(int fd)
85: {
86: int flags = fcntl(fd, F_GETFL);
87: if(flags < 0)
88: return 0;
89: if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0)
90: return 0;
91: return 1;
92: }
93:
94: struct lan_addr_s *
95: get_lan_for_peer(const struct sockaddr * peer)
96: {
97: struct lan_addr_s * lan_addr = NULL;
98: #ifdef DEBUG
99: char dbg_str[64];
100: #endif /* DEBUG */
101:
102: #ifdef ENABLE_IPV6
103: if(peer->sa_family == AF_INET6)
104: {
105: struct sockaddr_in6 * peer6 = (struct sockaddr_in6 *)peer;
106: if(IN6_IS_ADDR_V4MAPPED(&peer6->sin6_addr))
107: {
108: struct in_addr peer_addr;
109: memcpy(&peer_addr, &peer6->sin6_addr.s6_addr[12], 4);
110: for(lan_addr = lan_addrs.lh_first;
111: lan_addr != NULL;
112: lan_addr = lan_addr->list.le_next)
113: {
114: if( (peer_addr.s_addr & lan_addr->mask.s_addr)
115: == (lan_addr->addr.s_addr & lan_addr->mask.s_addr))
116: break;
117: }
118: }
119: else
120: {
121: int index = -1;
122: if(peer6->sin6_scope_id > 0)
123: index = (int)peer6->sin6_scope_id;
124: else
125: {
126: if(get_src_for_route_to(peer, NULL, NULL, &index) < 0)
127: return NULL;
128: }
129: syslog(LOG_DEBUG, "%s looking for LAN interface index=%d",
130: "get_lan_for_peer()", index);
131: for(lan_addr = lan_addrs.lh_first;
132: lan_addr != NULL;
133: lan_addr = lan_addr->list.le_next)
134: {
135: syslog(LOG_DEBUG,
136: "ifname=%s index=%u str=%s addr=%08x mask=%08x",
137: lan_addr->ifname, lan_addr->index,
138: lan_addr->str,
139: ntohl(lan_addr->addr.s_addr),
140: ntohl(lan_addr->mask.s_addr));
141: if(index == (int)lan_addr->index)
142: break;
143: }
144: }
145: }
146: else if(peer->sa_family == AF_INET)
147: {
148: #endif /* ENABLE_IPV6 */
149: for(lan_addr = lan_addrs.lh_first;
150: lan_addr != NULL;
151: lan_addr = lan_addr->list.le_next)
152: {
153: if( (((const struct sockaddr_in *)peer)->sin_addr.s_addr & lan_addr->mask.s_addr)
154: == (lan_addr->addr.s_addr & lan_addr->mask.s_addr))
155: break;
156: }
157: #ifdef ENABLE_IPV6
158: }
159: #endif /* ENABLE_IPV6 */
160:
161: #ifdef DEBUG
162: sockaddr_to_string(peer, dbg_str, sizeof(dbg_str));
163: if(lan_addr) {
164: syslog(LOG_DEBUG, "%s: %s found in LAN %s %s",
165: "get_lan_for_peer()", dbg_str,
166: lan_addr->ifname, lan_addr->str);
167: } else {
168: syslog(LOG_DEBUG, "%s: %s not found !", "get_lan_for_peer()",
169: dbg_str);
170: }
171: #endif /* DEBUG */
172: return lan_addr;
173: }
174:
175: #if defined(CLOCK_MONOTONIC_FAST)
176: #define UPNP_CLOCKID CLOCK_MONOTONIC_FAST
177: #elif defined(CLOCK_MONOTONIC)
178: #define UPNP_CLOCKID CLOCK_MONOTONIC
179: #endif
180:
181: int upnp_gettimeofday(struct timeval * tv)
182: {
183: #if defined(CLOCK_MONOTONIC_FAST) || defined(CLOCK_MONOTONIC)
184: struct timespec ts;
185: int ret_code = clock_gettime(UPNP_CLOCKID, &ts);
186: if (ret_code == 0)
187: {
188: tv->tv_sec = ts.tv_sec;
189: tv->tv_usec = ts.tv_nsec / 1000;
190: }
191: return ret_code;
192: #else
193: return gettimeofday(tv, NULL);
194: #endif
195: }
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