1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
#include <u.h>
#define NOPLAN9DEFINES
#include <libc.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <sys/un.h>
#include <errno.h>
#undef sun
#define sun sockun
extern int _p9netfd(char*);
static char *unknown = "unknown";
static int
convert(int s, struct sockaddr *sa, char **lsys, char **lserv, char **laddr)
{
struct sockaddr_un *sun;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
uchar *ip;
u32int ipl;
socklen_t sn;
int n;
char *net;
switch(sa->sa_family){
case AF_INET:
sin = (void*)sa;
ip = (uchar*)&sin->sin_addr;
ipl = *(u32int*)ip;
if(ipl == 0)
*lsys = strdup("*");
else
*lsys = smprint("%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
*lserv = smprint("%d", ntohs(sin->sin_port));
sn = sizeof n;
if(getsockopt(s, SOL_SOCKET, SO_TYPE, (void*)&n, &sn) < 0)
return -1;
if(n == SOCK_STREAM)
net = "tcp";
else if(n == SOCK_DGRAM)
net = "udp";
else{
werrstr("unknown network type");
return -1;
}
*laddr = smprint("%s!%s!%s", net, *lsys, *lserv);
if(*lsys == nil || *lserv == nil || *laddr == nil)
return -1;
return 0;
case AF_INET6:
sin6 = (void*)sa;
if (memcmp(&sin6->sin6_addr, &in6addr_any, sizeof(in6addr_any)) == 0)
*lsys = strdup("*");
else{
*lsys = malloc(INET6_ADDRSTRLEN);
inet_ntop(AF_INET6, &sin6->sin6_addr, *lsys, INET6_ADDRSTRLEN);
}
*lserv = smprint("%d", ntohs(sin6->sin6_port));
sn = sizeof n;
if(getsockopt(s, SOL_SOCKET, SO_TYPE, (void*)&n, &sn) < 0)
return -1;
if(n == SOCK_STREAM)
net = "tcp";
else if(n == SOCK_DGRAM)
net = "udp";
else{
werrstr("unknown network type");
return -1;
}
*laddr = smprint("%s!%s!%s", net, *lsys, *lserv);
if(*lsys == nil || *lserv == nil || *laddr == nil)
return -1;
return 0;
case AF_UNIX:
sun = (void*)sa;
*lsys = unknown;
*lserv = unknown;
*laddr = smprint("unix!%s", sun->sun_path);
if(*laddr == nil)
return -1;
return 0;
default:
werrstr("unknown socket family");
return -1;
}
}
NetConnInfo*
getnetconninfo(char *dir, int fd)
{
socklen_t sn;
union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sockaddr_un sun;
} u;
NetConnInfo *nci;
if(dir){
if((fd = _p9netfd(dir)) < 0){
werrstr("no such network connection %s", dir);
return nil;
}
}
nci = mallocz(sizeof *nci, 1);
if(nci == nil)
goto err;
nci->dir = smprint("/dev/fd/%d", fd);
nci->root = strdup("/net");
nci->spec = unknown;
if(nci->dir == nil || nci->root == nil)
goto err;
sn = sizeof u;
if(getsockname(fd, &u.sa, &sn) < 0)
goto err;
if(convert(fd, &u.sa, &nci->lsys, &nci->lserv, &nci->laddr) < 0)
goto err;
sn = sizeof u;
if(getpeername(fd, &u.sa, &sn) < 0)
goto err;
if(convert(fd, &u.sa, &nci->rsys, &nci->rserv, &nci->raddr) < 0)
goto err;
return nci;
err:
freenetconninfo(nci);
return nil;
}
static void
xfree(void *v)
{
if(v != nil && v != unknown)
free(v);
}
void
freenetconninfo(NetConnInfo *nci)
{
if(nci == nil)
return;
xfree(nci->dir);
xfree(nci->root);
xfree(nci->spec);
xfree(nci->lsys);
xfree(nci->lserv);
xfree(nci->rsys);
xfree(nci->rserv);
xfree(nci->laddr);
xfree(nci->raddr);
free(nci);
}
|