diff options
Diffstat (limited to 'libpq/ip.c')
| -rw-r--r-- | libpq/ip.c | 819 |
1 files changed, 0 insertions, 819 deletions
diff --git a/libpq/ip.c b/libpq/ip.c deleted file mode 100644 index 9591ed2..0000000 --- a/libpq/ip.c +++ /dev/null @@ -1,819 +0,0 @@ -/*------------------------------------------------------------------------- - * - * ip.c - * IPv6-aware network access. - * - * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group - * Portions Copyright (c) 1994, Regents of the University of California - * - * - * IDENTIFICATION - * src/backend/libpq/ip.c - * - * This file and the IPV6 implementation were initially provided by - * Nigel Kukard <nkukard@lbsd.net>, Linux Based Systems Design - * http://www.lbsd.net. - * - *------------------------------------------------------------------------- - */ - -/* This is intended to be used in both frontend and backend, so use c.h */ -#include "c.h" - -#include <unistd.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/socket.h> -#include <netdb.h> -#include <netinet/in.h> -#ifdef HAVE_NETINET_TCP_H -#include <netinet/tcp.h> -#endif -#include <arpa/inet.h> -#include <sys/file.h> - -#include "libpq/ip.h" - - -static int range_sockaddr_AF_INET(const struct sockaddr_in * addr, - const struct sockaddr_in * netaddr, - const struct sockaddr_in * netmask); - -#ifdef HAVE_IPV6 -static int range_sockaddr_AF_INET6(const struct sockaddr_in6 * addr, - const struct sockaddr_in6 * netaddr, - const struct sockaddr_in6 * netmask); -#endif - -#ifdef HAVE_UNIX_SOCKETS -static int getaddrinfo_unix(const char *path, - const struct addrinfo * hintsp, - struct addrinfo ** result); - -static int getnameinfo_unix(const struct sockaddr_un * sa, int salen, - char *node, int nodelen, - char *service, int servicelen, - int flags); -#endif - - -/* - * pg_getaddrinfo_all - get address info for Unix, IPv4 and IPv6 sockets - */ -int -pg_getaddrinfo_all(const char *hostname, const char *servname, - const struct addrinfo * hintp, struct addrinfo ** result) -{ - int rc; - - /* not all versions of getaddrinfo() zero *result on failure */ - *result = NULL; - -#ifdef HAVE_UNIX_SOCKETS - if (hintp->ai_family == AF_UNIX) - return getaddrinfo_unix(servname, hintp, result); -#endif - - /* NULL has special meaning to getaddrinfo(). */ - rc = getaddrinfo((!hostname || hostname[0] == '\0') ? NULL : hostname, - servname, hintp, result); - - return rc; -} - - -/* - * pg_freeaddrinfo_all - free addrinfo structures for IPv4, IPv6, or Unix - * - * Note: the ai_family field of the original hint structure must be passed - * so that we can tell whether the addrinfo struct was built by the system's - * getaddrinfo() routine or our own getaddrinfo_unix() routine. Some versions - * of getaddrinfo() might be willing to return AF_UNIX addresses, so it's - * not safe to look at ai_family in the addrinfo itself. - */ -void -pg_freeaddrinfo_all(int hint_ai_family, struct addrinfo * ai) -{ -#ifdef HAVE_UNIX_SOCKETS - if (hint_ai_family == AF_UNIX) - { - /* struct was built by getaddrinfo_unix (see pg_getaddrinfo_all) */ - while (ai != NULL) - { - struct addrinfo *p = ai; - - ai = ai->ai_next; - free(p->ai_addr); - free(p); - } - } - else -#endif /* HAVE_UNIX_SOCKETS */ - { - /* struct was built by getaddrinfo() */ - if (ai != NULL) - freeaddrinfo(ai); - } -} - - -/* - * pg_getnameinfo_all - get name info for Unix, IPv4 and IPv6 sockets - * - * The API of this routine differs from the standard getnameinfo() definition - * in two ways: first, the addr parameter is declared as sockaddr_storage - * rather than struct sockaddr, and second, the node and service fields are - * guaranteed to be filled with something even on failure return. - */ -int -pg_getnameinfo_all(const struct sockaddr_storage * addr, int salen, - char *node, int nodelen, - char *service, int servicelen, - int flags) -{ - int rc; - -#ifdef HAVE_UNIX_SOCKETS - if (addr && addr->ss_family == AF_UNIX) - rc = getnameinfo_unix((const struct sockaddr_un *) addr, salen, - node, nodelen, - service, servicelen, - flags); - else -#endif - rc = getnameinfo((const struct sockaddr *) addr, salen, - node, nodelen, - service, servicelen, - flags); - - if (rc != 0) - { - if (node) - strlcpy(node, "???", nodelen); - if (service) - strlcpy(service, "???", servicelen); - } - - return rc; -} - - -#if defined(HAVE_UNIX_SOCKETS) - -/* ------- - * getaddrinfo_unix - get unix socket info using IPv6-compatible API - * - * Bugs: only one addrinfo is set even though hintsp is NULL or - * ai_socktype is 0 - * AI_CANONNAME is not supported. - * ------- - */ -static int -getaddrinfo_unix(const char *path, const struct addrinfo * hintsp, - struct addrinfo ** result) -{ - struct addrinfo hints; - struct addrinfo *aip; - struct sockaddr_un *unp; - - *result = NULL; - - MemSet(&hints, 0, sizeof(hints)); - - if (strlen(path) >= sizeof(unp->sun_path)) - return EAI_FAIL; - - if (hintsp == NULL) - { - hints.ai_family = AF_UNIX; - hints.ai_socktype = SOCK_STREAM; - } - else - memcpy(&hints, hintsp, sizeof(hints)); - - if (hints.ai_socktype == 0) - hints.ai_socktype = SOCK_STREAM; - - if (hints.ai_family != AF_UNIX) - { - /* shouldn't have been called */ - return EAI_FAIL; - } - - aip = calloc(1, sizeof(struct addrinfo)); - if (aip == NULL) - return EAI_MEMORY; - - unp = calloc(1, sizeof(struct sockaddr_un)); - if (unp == NULL) - { - free(aip); - return EAI_MEMORY; - } - - aip->ai_family = AF_UNIX; - aip->ai_socktype = hints.ai_socktype; - aip->ai_protocol = hints.ai_protocol; - aip->ai_next = NULL; - aip->ai_canonname = NULL; - *result = aip; - - unp->sun_family = AF_UNIX; - aip->ai_addr = (struct sockaddr *) unp; - aip->ai_addrlen = sizeof(struct sockaddr_un); - - strcpy(unp->sun_path, path); - -#ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_LEN - unp->sun_len = sizeof(struct sockaddr_un); -#endif - - return 0; -} - -/* - * Convert an address to a hostname. - */ -static int -getnameinfo_unix(const struct sockaddr_un * sa, int salen, - char *node, int nodelen, - char *service, int servicelen, - int flags) -{ - int ret = -1; - - /* Invalid arguments. */ - if (sa == NULL || sa->sun_family != AF_UNIX || - (node == NULL && service == NULL)) - return EAI_FAIL; - - if (node) - { - ret = snprintf(node, nodelen, "%s", "[local]"); - if (ret == -1 || ret > nodelen) - return EAI_MEMORY; - } - - if (service) - { - ret = snprintf(service, servicelen, "%s", sa->sun_path); - if (ret == -1 || ret > servicelen) - return EAI_MEMORY; - } - - return 0; -} -#endif /* HAVE_UNIX_SOCKETS */ - - -/* - * pg_range_sockaddr - is addr within the subnet specified by netaddr/netmask ? - * - * Note: caller must already have verified that all three addresses are - * in the same address family; and AF_UNIX addresses are not supported. - */ -int -pg_range_sockaddr(const struct sockaddr_storage * addr, - const struct sockaddr_storage * netaddr, - const struct sockaddr_storage * netmask) -{ - if (addr->ss_family == AF_INET) - return range_sockaddr_AF_INET((const struct sockaddr_in *) addr, - (const struct sockaddr_in *) netaddr, - (const struct sockaddr_in *) netmask); -#ifdef HAVE_IPV6 - else if (addr->ss_family == AF_INET6) - return range_sockaddr_AF_INET6((const struct sockaddr_in6 *) addr, - (const struct sockaddr_in6 *) netaddr, - (const struct sockaddr_in6 *) netmask); -#endif - else - return 0; -} - -static int -range_sockaddr_AF_INET(const struct sockaddr_in * addr, - const struct sockaddr_in * netaddr, - const struct sockaddr_in * netmask) -{ - if (((addr->sin_addr.s_addr ^ netaddr->sin_addr.s_addr) & - netmask->sin_addr.s_addr) == 0) - return 1; - else - return 0; -} - - -#ifdef HAVE_IPV6 - -static int -range_sockaddr_AF_INET6(const struct sockaddr_in6 * addr, - const struct sockaddr_in6 * netaddr, - const struct sockaddr_in6 * netmask) -{ - int i; - - for (i = 0; i < 16; i++) - { - if (((addr->sin6_addr.s6_addr[i] ^ netaddr->sin6_addr.s6_addr[i]) & - netmask->sin6_addr.s6_addr[i]) != 0) - return 0; - } - - return 1; -} -#endif /* HAVE_IPV6 */ - -/* - * pg_sockaddr_cidr_mask - make a network mask of the appropriate family - * and required number of significant bits - * - * numbits can be null, in which case the mask is fully set. - * - * The resulting mask is placed in *mask, which had better be big enough. - * - * Return value is 0 if okay, -1 if not. - */ -int -pg_sockaddr_cidr_mask(struct sockaddr_storage * mask, char *numbits, int family) -{ - long bits; - char *endptr; - - if (numbits == NULL) - { - bits = (family == AF_INET) ? 32 : 128; - } - else - { - bits = strtol(numbits, &endptr, 10); - if (*numbits == '\0' || *endptr != '\0') - return -1; - } - - switch (family) - { - case AF_INET: - { - struct sockaddr_in mask4; - long maskl; - - if (bits < 0 || bits > 32) - return -1; - memset(&mask4, 0, sizeof(mask4)); - /* avoid "x << 32", which is not portable */ - if (bits > 0) - maskl = (0xffffffffUL << (32 - (int) bits)) - & 0xffffffffUL; - else - maskl = 0; - mask4.sin_addr.s_addr = htonl(maskl); - memcpy(mask, &mask4, sizeof(mask4)); - break; - } - -#ifdef HAVE_IPV6 - case AF_INET6: - { - struct sockaddr_in6 mask6; - int i; - - if (bits < 0 || bits > 128) - return -1; - memset(&mask6, 0, sizeof(mask6)); - for (i = 0; i < 16; i++) - { - if (bits <= 0) - mask6.sin6_addr.s6_addr[i] = 0; - else if (bits >= 8) - mask6.sin6_addr.s6_addr[i] = 0xff; - else - { - mask6.sin6_addr.s6_addr[i] = - (0xff << (8 - (int) bits)) & 0xff; - } - bits -= 8; - } - memcpy(mask, &mask6, sizeof(mask6)); - break; - } -#endif - default: - return -1; - } - - mask->ss_family = family; - return 0; -} - - -/* - * Run the callback function for the addr/mask, after making sure the - * mask is sane for the addr. - */ -static void -run_ifaddr_callback(PgIfAddrCallback callback, void *cb_data, - struct sockaddr * addr, struct sockaddr * mask) -{ - struct sockaddr_storage fullmask; - - if (!addr) - return; - - /* Check that the mask is valid */ - if (mask) - { - if (mask->sa_family != addr->sa_family) - { - mask = NULL; - } - else if (mask->sa_family == AF_INET) - { - if (((struct sockaddr_in *) mask)->sin_addr.s_addr == INADDR_ANY) - mask = NULL; - } -#ifdef HAVE_IPV6 - else if (mask->sa_family == AF_INET6) - { - if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *) mask)->sin6_addr)) - mask = NULL; - } -#endif - } - - /* If mask is invalid, generate our own fully-set mask */ - if (!mask) - { - pg_sockaddr_cidr_mask(&fullmask, NULL, addr->sa_family); - mask = (struct sockaddr *) & fullmask; - } - - (*callback) (addr, mask, cb_data); -} - -#ifdef WIN32 - -#include <winsock2.h> -#include <ws2tcpip.h> - -/* - * Enumerate the system's network interface addresses and call the callback - * for each one. Returns 0 if successful, -1 if trouble. - * - * This version is for Win32. Uses the Winsock 2 functions (ie: ws2_32.dll) - */ -int -pg_foreach_ifaddr(PgIfAddrCallback callback, void *cb_data) -{ - INTERFACE_INFO *ptr, - *ii = NULL; - unsigned long length, - i; - unsigned long n_ii = 0; - SOCKET sock; - int error; - - sock = WSASocket(AF_INET, SOCK_DGRAM, 0, 0, 0, 0); - if (sock == INVALID_SOCKET) - return -1; - - while (n_ii < 1024) - { - n_ii += 64; - ptr = realloc(ii, sizeof(INTERFACE_INFO) * n_ii); - if (!ptr) - { - free(ii); - closesocket(sock); - errno = ENOMEM; - return -1; - } - - ii = ptr; - if (WSAIoctl(sock, SIO_GET_INTERFACE_LIST, 0, 0, - ii, n_ii * sizeof(INTERFACE_INFO), - &length, 0, 0) == SOCKET_ERROR) - { - error = WSAGetLastError(); - if (error == WSAEFAULT || error == WSAENOBUFS) - continue; /* need to make the buffer bigger */ - closesocket(sock); - free(ii); - return -1; - } - - break; - } - - for (i = 0; i < length / sizeof(INTERFACE_INFO); ++i) - run_ifaddr_callback(callback, cb_data, - (struct sockaddr *) & ii[i].iiAddress, - (struct sockaddr *) & ii[i].iiNetmask); - - closesocket(sock); - free(ii); - return 0; -} -#elif HAVE_GETIFADDRS /* && !WIN32 */ - -#ifdef HAVE_IFADDRS_H -#include <ifaddrs.h> -#endif - -/* - * Enumerate the system's network interface addresses and call the callback - * for each one. Returns 0 if successful, -1 if trouble. - * - * This version uses the getifaddrs() interface, which is available on - * BSDs, AIX, and modern Linux. - */ -int -pg_foreach_ifaddr(PgIfAddrCallback callback, void *cb_data) -{ - struct ifaddrs *ifa, - *l; - - if (getifaddrs(&ifa) < 0) - return -1; - - for (l = ifa; l; l = l->ifa_next) - run_ifaddr_callback(callback, cb_data, - l->ifa_addr, l->ifa_netmask); - - freeifaddrs(ifa); - return 0; -} -#else /* !HAVE_GETIFADDRS && !WIN32 */ - -#ifdef HAVE_SYS_IOCTL_H -#include <sys/ioctl.h> -#endif - -#ifdef HAVE_NET_IF_H -#include <net/if.h> -#endif - -#ifdef HAVE_SYS_SOCKIO_H -#include <sys/sockio.h> -#endif - -/* - * SIOCGIFCONF does not return IPv6 addresses on Solaris - * and HP/UX. So we prefer SIOCGLIFCONF if it's available. - * - * On HP/UX, however, it *only* returns IPv6 addresses, - * and the structs are named slightly differently too. - * We'd have to do another call with SIOCGIFCONF to get the - * IPv4 addresses as well. We don't currently bother, just - * fall back to SIOCGIFCONF on HP/UX. - */ - -#if defined(SIOCGLIFCONF) && !defined(__hpux) - -/* - * Enumerate the system's network interface addresses and call the callback - * for each one. Returns 0 if successful, -1 if trouble. - * - * This version uses ioctl(SIOCGLIFCONF). - */ -int -pg_foreach_ifaddr(PgIfAddrCallback callback, void *cb_data) -{ - struct lifconf lifc; - struct lifreq *lifr, - lmask; - struct sockaddr *addr, - *mask; - char *ptr, - *buffer = NULL; - size_t n_buffer = 1024; - pgsocket sock, - fd; - -#ifdef HAVE_IPV6 - pgsocket sock6; -#endif - int i, - total; - - sock = socket(AF_INET, SOCK_DGRAM, 0); - if (sock == PGINVALID_SOCKET) - return -1; - - while (n_buffer < 1024 * 100) - { - n_buffer += 1024; - ptr = realloc(buffer, n_buffer); - if (!ptr) - { - free(buffer); - close(sock); - errno = ENOMEM; - return -1; - } - - memset(&lifc, 0, sizeof(lifc)); - lifc.lifc_family = AF_UNSPEC; - lifc.lifc_buf = buffer = ptr; - lifc.lifc_len = n_buffer; - - if (ioctl(sock, SIOCGLIFCONF, &lifc) < 0) - { - if (errno == EINVAL) - continue; - free(buffer); - close(sock); - return -1; - } - - /* - * Some Unixes try to return as much data as possible, with no - * indication of whether enough space allocated. Don't believe we have - * it all unless there's lots of slop. - */ - if (lifc.lifc_len < n_buffer - 1024) - break; - } - -#ifdef HAVE_IPV6 - /* We'll need an IPv6 socket too for the SIOCGLIFNETMASK ioctls */ - sock6 = socket(AF_INET6, SOCK_DGRAM, 0); - if (sock6 == PGINVALID_SOCKET) - { - free(buffer); - close(sock); - return -1; - } -#endif - - total = lifc.lifc_len / sizeof(struct lifreq); - lifr = lifc.lifc_req; - for (i = 0; i < total; ++i) - { - addr = (struct sockaddr *) & lifr[i].lifr_addr; - memcpy(&lmask, &lifr[i], sizeof(struct lifreq)); -#ifdef HAVE_IPV6 - fd = (addr->sa_family == AF_INET6) ? sock6 : sock; -#else - fd = sock; -#endif - if (ioctl(fd, SIOCGLIFNETMASK, &lmask) < 0) - mask = NULL; - else - mask = (struct sockaddr *) & lmask.lifr_addr; - run_ifaddr_callback(callback, cb_data, addr, mask); - } - - free(buffer); - close(sock); -#ifdef HAVE_IPV6 - close(sock6); -#endif - return 0; -} -#elif defined(SIOCGIFCONF) - -/* - * Remaining Unixes use SIOCGIFCONF. Some only return IPv4 information - * here, so this is the least preferred method. Note that there is no - * standard way to iterate the struct ifreq returned in the array. - * On some OSs the structures are padded large enough for any address, - * on others you have to calculate the size of the struct ifreq. - */ - -/* Some OSs have _SIZEOF_ADDR_IFREQ, so just use that */ -#ifndef _SIZEOF_ADDR_IFREQ - -/* Calculate based on sockaddr.sa_len */ -#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN -#define _SIZEOF_ADDR_IFREQ(ifr) \ - ((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \ - (sizeof(struct ifreq) - sizeof(struct sockaddr) + \ - (ifr).ifr_addr.sa_len) : sizeof(struct ifreq)) - -/* Padded ifreq structure, simple */ -#else -#define _SIZEOF_ADDR_IFREQ(ifr) \ - sizeof (struct ifreq) -#endif -#endif /* !_SIZEOF_ADDR_IFREQ */ - -/* - * Enumerate the system's network interface addresses and call the callback - * for each one. Returns 0 if successful, -1 if trouble. - * - * This version uses ioctl(SIOCGIFCONF). - */ -int -pg_foreach_ifaddr(PgIfAddrCallback callback, void *cb_data) -{ - struct ifconf ifc; - struct ifreq *ifr, - *end, - addr, - mask; - char *ptr, - *buffer = NULL; - size_t n_buffer = 1024; - pgsocket sock; - - sock = socket(AF_INET, SOCK_DGRAM, 0); - if (sock == PGINVALID_SOCKET) - return -1; - - while (n_buffer < 1024 * 100) - { - n_buffer += 1024; - ptr = realloc(buffer, n_buffer); - if (!ptr) - { - free(buffer); - close(sock); - errno = ENOMEM; - return -1; - } - - memset(&ifc, 0, sizeof(ifc)); - ifc.ifc_buf = buffer = ptr; - ifc.ifc_len = n_buffer; - - if (ioctl(sock, SIOCGIFCONF, &ifc) < 0) - { - if (errno == EINVAL) - continue; - free(buffer); - close(sock); - return -1; - } - - /* - * Some Unixes try to return as much data as possible, with no - * indication of whether enough space allocated. Don't believe we have - * it all unless there's lots of slop. - */ - if (ifc.ifc_len < n_buffer - 1024) - break; - } - - end = (struct ifreq *) (buffer + ifc.ifc_len); - for (ifr = ifc.ifc_req; ifr < end;) - { - memcpy(&addr, ifr, sizeof(addr)); - memcpy(&mask, ifr, sizeof(mask)); - if (ioctl(sock, SIOCGIFADDR, &addr, sizeof(addr)) == 0 && - ioctl(sock, SIOCGIFNETMASK, &mask, sizeof(mask)) == 0) - run_ifaddr_callback(callback, cb_data, - &addr.ifr_addr, &mask.ifr_addr); - ifr = (struct ifreq *) ((char *) ifr + _SIZEOF_ADDR_IFREQ(*ifr)); - } - - free(buffer); - close(sock); - return 0; -} -#else /* !defined(SIOCGIFCONF) */ - -/* - * Enumerate the system's network interface addresses and call the callback - * for each one. Returns 0 if successful, -1 if trouble. - * - * This version is our fallback if there's no known way to get the - * interface addresses. Just return the standard loopback addresses. - */ -int -pg_foreach_ifaddr(PgIfAddrCallback callback, void *cb_data) -{ - struct sockaddr_in addr; - struct sockaddr_storage mask; - -#ifdef HAVE_IPV6 - struct sockaddr_in6 addr6; -#endif - - /* addr 127.0.0.1/8 */ - memset(&addr, 0, sizeof(addr)); - addr.sin_family = AF_INET; - addr.sin_addr.s_addr = ntohl(0x7f000001); - memset(&mask, 0, sizeof(mask)); - pg_sockaddr_cidr_mask(&mask, "8", AF_INET); - run_ifaddr_callback(callback, cb_data, - (struct sockaddr *) & addr, - (struct sockaddr *) & mask); - -#ifdef HAVE_IPV6 - /* addr ::1/128 */ - memset(&addr6, 0, sizeof(addr6)); - addr6.sin6_family = AF_INET6; - addr6.sin6_addr.s6_addr[15] = 1; - memset(&mask, 0, sizeof(mask)); - pg_sockaddr_cidr_mask(&mask, "128", AF_INET6); - run_ifaddr_callback(callback, cb_data, - (struct sockaddr *) & addr6, - (struct sockaddr *) & mask); -#endif - - return 0; -} -#endif /* !defined(SIOCGIFCONF) */ - -#endif /* !HAVE_GETIFADDRS */ |