server.c revision 30715 
1/*
2 * $Id: $
3 */
4
5#include <sys/param.h>
6#include <sys/socket.h>
7#include <netinet/in.h>
8#include <arpa/inet.h>
9#include <netinet/in_systm.h>
10#include <netinet/ip.h>
11
12#include <errno.h>
13#include <stdio.h>
14#include <string.h>
15#include <sys/stat.h>
16#include <sys/un.h>
17#include <unistd.h>
18
19#include "mbuf.h"
20#include "log.h"
21#include "loadalias.h"
22#include "command.h"
23#include "vars.h"
24#include "server.h"
25#include "log.h"
26#include "defs.h"
27
28int server = -2;
29
30static struct sockaddr_un ifsun;
31static char *rm;
32
33int
34ServerLocalOpen(const char *name, mode_t mask)
35{
36  int s;
37
38  if (VarLocalAuth == LOCAL_DENY) {
39    LogPrintf(LogERROR, "Local: Can't open socket %s: No password "
40	      "in ppp.secret\n", name);
41    return 1;
42  }
43
44  if (!(mode&(MODE_AUTO|MODE_DEDICATED|MODE_DIRECT))) {
45    LogPrintf(LogERROR, "Local: Can't open socket in interactive mode\n");
46    return 1;
47  }
48
49  ifsun.sun_len = strlen(name);
50  if (ifsun.sun_len > sizeof ifsun.sun_path - 1) {
51    LogPrintf(LogERROR, "Local: %s: Path too long\n", name);
52    return 2;
53  }
54  ifsun.sun_family = AF_LOCAL;
55  strcpy(ifsun.sun_path, name);
56
57  s = socket(PF_LOCAL, SOCK_STREAM, 0);
58  if (s < 0) {
59    LogPrintf(LogERROR, "Local: socket: %s\n", strerror(errno));
60    return 3;
61  }
62  setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s);
63  mask = umask(mask);
64  if (bind(s, (struct sockaddr *) & ifsun, sizeof(ifsun)) < 0) {
65    umask(mask);
66    LogPrintf(LogERROR, "Local: bind: %s\n", strerror(errno));
67    if (errno == EADDRINUSE && VarTerm)
68      fprintf(VarTerm, "Wait for a while, then try again.\n");
69    close(s);
70    unlink(name);
71    return 4;
72  }
73  umask(mask);
74  if (listen(s, 5) != 0) {
75    LogPrintf(LogERROR, "Local: Unable to listen to socket - OS overload?\n");
76    close(s);
77    unlink(name);
78    return 5;
79  }
80  ServerClose();
81  server = s;
82  rm = ifsun.sun_path;
83  LogPrintf(LogPHASE, "Listening at local socket %s.\n", name);
84  return 0;
85}
86
87int
88ServerTcpOpen(int port)
89{
90  struct sockaddr_in ifsin;
91  int s;
92
93  if (VarLocalAuth == LOCAL_DENY) {
94    LogPrintf(LogERROR, "Tcp: Can't open socket %d: No password "
95	      "in ppp.secret\n", port);
96    return 6;
97  }
98
99  if (!(mode&(MODE_AUTO|MODE_DEDICATED|MODE_DIRECT))) {
100    LogPrintf(LogERROR, "Tcp: Can't open socket in interactive mode\n");
101    return 6;
102  }
103
104  s = socket(PF_INET, SOCK_STREAM, 0);
105  if (s < 0) {
106    LogPrintf(LogERROR, "Tcp: socket: %s\n", strerror(errno));
107    return 7;
108  }
109  ifsin.sin_family = AF_INET;
110  ifsin.sin_addr.s_addr = INADDR_ANY;
111  ifsin.sin_port = htons(port);
112  setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s);
113  if (bind(s, (struct sockaddr *) & ifsin, sizeof(ifsin)) < 0) {
114    LogPrintf(LogERROR, "Tcp: bind: %s\n", strerror(errno));
115    if (errno == EADDRINUSE && VarTerm)
116      fprintf(VarTerm, "Wait for a while, then try again.\n");
117    close(s);
118    return 8;
119  }
120  if (listen(s, 5) != 0) {
121    LogPrintf(LogERROR, "Tcp: Unable to listen to socket - OS overload?\n");
122    close(s);
123    return 9;
124  }
125  ServerClose();
126  server = s;
127  LogPrintf(LogPHASE, "Listening at port %d.\n", port);
128  return 0;
129}
130
131void
132ServerClose()
133{
134  if (server >= 0) {
135    close(server);
136    if (rm) {
137      unlink(rm);
138      rm = 0;
139    }
140  }
141  server = -1;
142}
143