PostgreSQL Source Code git master
Functions
ifaddr.c File Reference
#include "postgres.h"
#include <unistd.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/file.h>
#include "libpq/ifaddr.h"
#include "port/pg_bswap.h"
#include <sys/ioctl.h>
#include <net/if.h>
Include dependency graph for ifaddr.c:

Go to the source code of this file.

Functions

static int  range_sockaddr_AF_INET (const struct sockaddr_in *addr, const struct sockaddr_in *netaddr, const struct sockaddr_in *netmask)
 
static int  range_sockaddr_AF_INET6 (const struct sockaddr_in6 *addr, const struct sockaddr_in6 *netaddr, const struct sockaddr_in6 *netmask)
 
int  pg_range_sockaddr (const struct sockaddr_storage *addr, const struct sockaddr_storage *netaddr, const struct sockaddr_storage *netmask)
 
int  pg_sockaddr_cidr_mask (struct sockaddr_storage *mask, char *numbits, int family)
 
static void  run_ifaddr_callback (PgIfAddrCallback callback, void *cb_data, struct sockaddr *addr, struct sockaddr *mask)
 
int  pg_foreach_ifaddr (PgIfAddrCallback callback, void *cb_data)
 

Function Documentation

◆ pg_foreach_ifaddr()

int pg_foreach_ifaddr ( PgIfAddrCallback  callback,
void *  cb_data 
)

Definition at line 425 of file ifaddr.c.

426{
427 struct sockaddr_in addr;
428 struct sockaddr_storage mask;
429 struct sockaddr_in6 addr6;
430
431 /* addr 127.0.0.1/8 */
432 memset(&addr, 0, sizeof(addr));
433 addr.sin_family = AF_INET;
434 addr.sin_addr.s_addr = pg_ntoh32(0x7f000001);
435 memset(&mask, 0, sizeof(mask));
436 pg_sockaddr_cidr_mask(&mask, "8", AF_INET);
438 (struct sockaddr *) &addr,
439 (struct sockaddr *) &mask);
440
441 /* addr ::1/128 */
442 memset(&addr6, 0, sizeof(addr6));
443 addr6.sin6_family = AF_INET6;
444 addr6.sin6_addr.s6_addr[15] = 1;
445 memset(&mask, 0, sizeof(mask));
446 pg_sockaddr_cidr_mask(&mask, "128", AF_INET6);
448 (struct sockaddr *) &addr6,
449 (struct sockaddr *) &mask);
450
451 return 0;
452}
int pg_sockaddr_cidr_mask(struct sockaddr_storage *mask, char *numbits, int family)
Definition: ifaddr.c:105
static void run_ifaddr_callback(PgIfAddrCallback callback, void *cb_data, struct sockaddr *addr, struct sockaddr *mask)
Definition: ifaddr.c:181
#define pg_ntoh32(x)
Definition: pg_bswap.h:125
static void callback(struct sockaddr *addr, struct sockaddr *mask, void *unused)
Definition: test_ifaddrs.c:46

References callback(), pg_ntoh32, pg_sockaddr_cidr_mask(), and run_ifaddr_callback().

Referenced by check_same_host_or_net(), and main().

◆ pg_range_sockaddr()

int pg_range_sockaddr ( const struct sockaddr_storage *  addr,
const struct sockaddr_storage *  netaddr,
const struct sockaddr_storage *  netmask 
)

Definition at line 49 of file ifaddr.c.

52{
53 if (addr->ss_family == AF_INET)
54 return range_sockaddr_AF_INET((const struct sockaddr_in *) addr,
55 (const struct sockaddr_in *) netaddr,
56 (const struct sockaddr_in *) netmask);
57 else if (addr->ss_family == AF_INET6)
58 return range_sockaddr_AF_INET6((const struct sockaddr_in6 *) addr,
59 (const struct sockaddr_in6 *) netaddr,
60 (const struct sockaddr_in6 *) netmask);
61 else
62 return 0;
63}
static int range_sockaddr_AF_INET6(const struct sockaddr_in6 *addr, const struct sockaddr_in6 *netaddr, const struct sockaddr_in6 *netmask)
Definition: ifaddr.c:78
static int range_sockaddr_AF_INET(const struct sockaddr_in *addr, const struct sockaddr_in *netaddr, const struct sockaddr_in *netmask)
Definition: ifaddr.c:66

References range_sockaddr_AF_INET(), and range_sockaddr_AF_INET6().

Referenced by check_ip().

◆ pg_sockaddr_cidr_mask()

int pg_sockaddr_cidr_mask ( struct sockaddr_storage *  mask,
char *  numbits,
int  family 
)

Definition at line 105 of file ifaddr.c.

106{
107 long bits;
108 char *endptr;
109
110 if (numbits == NULL)
111 {
112 bits = (family == AF_INET) ? 32 : 128;
113 }
114 else
115 {
116 bits = strtol(numbits, &endptr, 10);
117 if (*numbits == '0円' || *endptr != '0円')
118 return -1;
119 }
120
121 switch (family)
122 {
123 case AF_INET:
124 {
125 struct sockaddr_in mask4;
126 long maskl;
127
128 if (bits < 0 || bits > 32)
129 return -1;
130 memset(&mask4, 0, sizeof(mask4));
131 /* avoid "x << 32", which is not portable */
132 if (bits > 0)
133 maskl = (0xffffffffUL << (32 - (int) bits))
134 & 0xffffffffUL;
135 else
136 maskl = 0;
137 mask4.sin_addr.s_addr = pg_hton32(maskl);
138 memcpy(mask, &mask4, sizeof(mask4));
139 break;
140 }
141
142 case AF_INET6:
143 {
144 struct sockaddr_in6 mask6;
145 int i;
146
147 if (bits < 0 || bits > 128)
148 return -1;
149 memset(&mask6, 0, sizeof(mask6));
150 for (i = 0; i < 16; i++)
151 {
152 if (bits <= 0)
153 mask6.sin6_addr.s6_addr[i] = 0;
154 else if (bits >= 8)
155 mask6.sin6_addr.s6_addr[i] = 0xff;
156 else
157 {
158 mask6.sin6_addr.s6_addr[i] =
159 (0xff << (8 - (int) bits)) & 0xff;
160 }
161 bits -= 8;
162 }
163 memcpy(mask, &mask6, sizeof(mask6));
164 break;
165 }
166
167 default:
168 return -1;
169 }
170
171 mask->ss_family = family;
172 return 0;
173}
i
int i
Definition: isn.c:77
#define pg_hton32(x)
Definition: pg_bswap.h:121

References i, and pg_hton32.

Referenced by check_network_callback(), parse_hba_line(), pg_foreach_ifaddr(), and run_ifaddr_callback().

◆ range_sockaddr_AF_INET()

static int range_sockaddr_AF_INET ( const struct sockaddr_in *  addr,
const struct sockaddr_in *  netaddr,
const struct sockaddr_in *  netmask 
)
static

Definition at line 66 of file ifaddr.c.

69{
70 if (((addr->sin_addr.s_addr ^ netaddr->sin_addr.s_addr) &
71 netmask->sin_addr.s_addr) == 0)
72 return 1;
73 else
74 return 0;
75}

Referenced by pg_range_sockaddr().

◆ range_sockaddr_AF_INET6()

static int range_sockaddr_AF_INET6 ( const struct sockaddr_in6 *  addr,
const struct sockaddr_in6 *  netaddr,
const struct sockaddr_in6 *  netmask 
)
static

Definition at line 78 of file ifaddr.c.

81{
82 int i;
83
84 for (i = 0; i < 16; i++)
85 {
86 if (((addr->sin6_addr.s6_addr[i] ^ netaddr->sin6_addr.s6_addr[i]) &
87 netmask->sin6_addr.s6_addr[i]) != 0)
88 return 0;
89 }
90
91 return 1;
92}

References i.

Referenced by pg_range_sockaddr().

◆ run_ifaddr_callback()

static void run_ifaddr_callback ( PgIfAddrCallback  callback,
void *  cb_data,
struct sockaddr *  addr,
struct sockaddr *  mask 
)
static

Definition at line 181 of file ifaddr.c.

183{
184 struct sockaddr_storage fullmask;
185
186 if (!addr)
187 return;
188
189 /* Check that the mask is valid */
190 if (mask)
191 {
192 if (mask->sa_family != addr->sa_family)
193 {
194 mask = NULL;
195 }
196 else if (mask->sa_family == AF_INET)
197 {
198 if (((struct sockaddr_in *) mask)->sin_addr.s_addr == INADDR_ANY)
199 mask = NULL;
200 }
201 else if (mask->sa_family == AF_INET6)
202 {
203 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *) mask)->sin6_addr))
204 mask = NULL;
205 }
206 }
207
208 /* If mask is invalid, generate our own fully-set mask */
209 if (!mask)
210 {
211 pg_sockaddr_cidr_mask(&fullmask, NULL, addr->sa_family);
212 mask = (struct sockaddr *) &fullmask;
213 }
214
215 (*callback) (addr, mask, cb_data);
216}

References pg_sockaddr_cidr_mask().

Referenced by pg_foreach_ifaddr().

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