sockaddr_conv.c

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#include <php.h>
#include <php_network.h>
#include "php_sockets.h"
 
#ifdef PHP_WIN32
#include "windows_common.h"
#else
#include <netdb.h>
#include <arpa/inet.h>
#endif
 
extern zend_result php_string_to_if_index(const char *val, unsigned *out);
 
#ifdef HAVE_IPV6
/* Sets addr by hostname, or by ip in string form (AF_INET6) */
int php_set_inet6_addr(struct sockaddr_in6 *sin6, char *string, php_socket *php_sock) /* {{{ */
{
    struct in6_addr tmp;
#ifdef HAVE_GETADDRINFO
    struct addrinfo hints;
    struct addrinfo *addrinfo = NULL;
#endif
    char *scope = strchr(string, '%');
 
    if (inet_pton(AF_INET6, string, &tmp)) {
        memcpy(&(sin6->sin6_addr.s6_addr), &(tmp.s6_addr), sizeof(struct in6_addr));
    } else {
#ifdef HAVE_GETADDRINFO
 
        memset(&hints, 0, sizeof(struct addrinfo));
        hints.ai_family = AF_INET6;
#ifdef AI_V4MAPPED
        hints.ai_flags = AI_V4MAPPED | AI_ADDRCONFIG;
#else
        hints.ai_flags = AI_ADDRCONFIG;
#endif
        getaddrinfo(string, NULL, &hints, &addrinfo);
        if (!addrinfo) {
#ifdef PHP_WIN32
            PHP_SOCKET_ERROR(php_sock, "Host lookup failed", WSAGetLastError());
#else
            PHP_SOCKET_ERROR(php_sock, "Host lookup failed", (-10000 - h_errno));
#endif
            return 0;
        }
        if (addrinfo->ai_family != PF_INET6 || addrinfo->ai_addrlen != sizeof(struct sockaddr_in6)) {
            php_error_docref(NULL, E_WARNING, "Host lookup failed: Non AF_INET6 domain returned on AF_INET6 socket");
            freeaddrinfo(addrinfo);
            return 0;
        }
 
        memcpy(&(sin6->sin6_addr.s6_addr), ((struct sockaddr_in6*)(addrinfo->ai_addr))->sin6_addr.s6_addr, sizeof(struct in6_addr));
        freeaddrinfo(addrinfo);
 
#else
        /* No IPv6 specific hostname resolution is available on this system? */
        php_error_docref(NULL, E_WARNING, "Host lookup failed: getaddrinfo() not available on this system");
        return 0;
#endif
 
    }
 
    if (scope) {
        zend_long lval = 0;
        double dval = 0;
        unsigned scope_id = 0;
 
        scope++;
 
        if (IS_LONG == is_numeric_string(scope, strlen(scope), &lval, &dval, 0)) {
            if (lval > 0 && (zend_ulong)lval <= UINT_MAX) {
                scope_id = lval;
            }
        } else {
            php_string_to_if_index(scope, &scope_id);
        }
 
        sin6->sin6_scope_id = scope_id;
    }
 
    return 1;
}
/* }}} */
#endif
 
/* Sets addr by hostname, or by ip in string form (AF_INET)  */
int php_set_inet_addr(struct sockaddr_in *sin, char *string, php_socket *php_sock) /* {{{ */
{
    struct in_addr tmp;
    struct hostent *host_entry;
 
    if (inet_pton(AF_INET, string, &tmp)) {
        sin->sin_addr.s_addr = tmp.s_addr;
    } else {
        if (strlen(string) > MAXFQDNLEN || ! (host_entry = php_network_gethostbyname(string))) {
            /* Note: < -10000 indicates a host lookup error */
#ifdef PHP_WIN32
            PHP_SOCKET_ERROR(php_sock, "Host lookup failed", WSAGetLastError());
#else
            PHP_SOCKET_ERROR(php_sock, "Host lookup failed", (-10000 - h_errno));
#endif
            return 0;
        }
        if (host_entry->h_addrtype != AF_INET) {
            php_error_docref(NULL, E_WARNING, "Host lookup failed: Non AF_INET domain returned on AF_INET socket");
            return 0;
        }
        memcpy(&(sin->sin_addr.s_addr), host_entry->h_addr_list[0], host_entry->h_length);
    }
 
    return 1;
}
/* }}} */
 
/* Sets addr by hostname or by ip in string form (AF_INET or AF_INET6,
 * depending on the socket) */
int php_set_inet46_addr(php_sockaddr_storage *ss, socklen_t *ss_len, char *string, php_socket *php_sock) /* {{{ */
{
    if (php_sock->type == AF_INET) {
        struct sockaddr_in t = {0};
        if (php_set_inet_addr(&t, string, php_sock)) {
            memcpy(ss, &t, sizeof t);
            ss->ss_family = AF_INET;
            *ss_len = sizeof(t);
            return 1;
        }
    }
#ifdef HAVE_IPV6
    else if (php_sock->type == AF_INET6) {
        struct sockaddr_in6 t = {0};
        if (php_set_inet6_addr(&t, string, php_sock)) {
            memcpy(ss, &t, sizeof t);
            ss->ss_family = AF_INET6;
            *ss_len = sizeof(t);
            return 1;
        }
    }
#endif
    else {
        php_error_docref(NULL, E_WARNING,
            "IP address used in the context of an unexpected type of socket");
    }
    return 0;
}