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Annotation of embedaddon/strongswan/src/libstrongswan/networking/streams/stream_tcp.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2013 Martin Willi
                      3:  * Copyright (C) 2013 revosec AG
                      4:  *
                      5:  * This program is free software; you can redistribute it and/or modify it
                      6:  * under the terms of the GNU General Public License as published by the
                      7:  * Free Software Foundation; either version 2 of the License, or (at your
                      8:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
                      9:  *
                     10:  * This program is distributed in the hope that it will be useful, but
                     11:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     12:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
                     13:  * for more details.
                     14:  */
                     15: 
                     16: #include <library.h>
                     17: #include <errno.h>
                     18: #include <unistd.h>
                     19: #include <limits.h>
                     20: 
                     21: #include "stream_tcp.h"
                     22: 
                     23: /**
                     24:  * See header.
                     25:  */
                     26: int stream_parse_uri_tcp(char *uri, struct sockaddr *addr)
                     27: {
                     28:        char *pos, buf[128];
                     29:        host_t *host;
                     30:        u_long port;
                     31:        int len;
                     32: 
                     33:        if (!strpfx(uri, "tcp://"))
                     34:        {
                     35:                return -1;
                     36:        }
                     37:        uri += strlen("tcp://");
                     38:        pos = strrchr(uri, ':');
                     39:        if (!pos)
                     40:        {
                     41:                return -1;
                     42:        }
                     43:        if (*uri == '[' && pos > uri && *(pos - 1) == ']')
                     44:        {
                     45:                /* IPv6 URI */
                     46:                snprintf(buf, sizeof(buf), "%.*s", (int)(pos - uri - 2), uri + 1);
                     47:        }
                     48:        else
                     49:        {
                     50:                snprintf(buf, sizeof(buf), "%.*s", (int)(pos - uri), uri);
                     51:        }
                     52:        port = strtoul(pos + 1, &pos, 10);
                     53:        if (port == ULONG_MAX || *pos || port > 65535)
                     54:        {
                     55:                return -1;
                     56:        }
                     57:        host = host_create_from_dns(buf, AF_UNSPEC, port);
                     58:        if (!host)
                     59:        {
                     60:                return -1;
                     61:        }
                     62:        len = *host->get_sockaddr_len(host);
                     63:        memcpy(addr, host->get_sockaddr(host), len);
                     64:        host->destroy(host);
                     65:        return len;
                     66: }
                     67: 
                     68: /**
                     69:  * See header
                     70:  */
                     71: stream_t *stream_create_tcp(char *uri)
                     72: {
                     73:        union {
                     74:                struct sockaddr_in in;
                     75:                struct sockaddr_in6 in6;
                     76:                struct sockaddr sa;
                     77:        } addr;
                     78:        int fd, len;
                     79: 
                     80:        len = stream_parse_uri_tcp(uri, &addr.sa);
                     81:        if (len == -1)
                     82:        {
                     83:                DBG1(DBG_NET, "invalid stream URI: '%s'", uri);
                     84:                return NULL;
                     85:        }
                     86:        fd = socket(addr.sa.sa_family, SOCK_STREAM, 0);
                     87:        if (fd < 0)
                     88:        {
                     89:                DBG1(DBG_NET, "opening socket '%s' failed: %s", uri, strerror(errno));
                     90:                return NULL;
                     91:        }
                     92:        if (connect(fd, &addr.sa, len))
                     93:        {
                     94:                DBG1(DBG_NET, "connecting to '%s' failed: %s", uri, strerror(errno));
                     95:                close(fd);
                     96:                return NULL;
                     97:        }
                     98:        return stream_create_from_fd(fd);
                     99: }