6c55c4b19e34fe5d8353c98b376181e392604f94
[paraslash.git] / dccp_recv.c
1 /*
2 * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 #include "para.h"
20 #include "error.h"
21 #include "dccp.h"
22 #include "recv.h"
23 #include "string.h"
24 #include "net.h"
25
26 #include "dccp_recv.cmdline.h"
27
28 /* needed by getaddrinfo */
29 #include <sys/types.h>
30 #include <sys/socket.h>
31 #include <netdb.h>
32
33
34 #define DCCP_BUFSIZE 4096
35
36 /**
37 * data specific to the dccp receiver
38 *
39 * \sa receiver receiver_node
40 */
41 struct private_dccp_recv_data {
42 /** the file descriptor for the dccp socket */
43 int fd;
44 };
45
46
47 static void dccp_recv_close(struct receiver_node *rn)
48 {
49
50 struct private_dccp_recv_data *pdd = rn->private_data;
51
52 if (pdd && pdd->fd > 0)
53 close(pdd->fd);
54 free(rn->buf);
55 rn->buf = NULL;
56 free(rn->private_data);
57 rn->private_data = NULL;
58 }
59
60
61 static int dccp_recv_open(struct receiver_node *rn)
62 {
63 struct private_dccp_recv_data *pdd;
64 struct gengetopt_args_info *conf = rn->conf;
65 int ret;
66 struct addrinfo *ai;
67 char *tmp;
68
69 rn->buf = para_calloc(DCCP_BUFSIZE);
70 rn->private_data = para_calloc(sizeof(struct private_dccp_recv_data));
71 pdd = rn->private_data;
72 ret = dccp_get_socket();
73 if (ret < 0)
74 goto err_out;
75 pdd->fd = ret;
76
77 tmp = make_message("%d", conf->port_arg);
78 ret = getaddrinfo(conf->host_arg, tmp, NULL, &ai);
79 free(tmp);
80 if (ret) {
81 ret = -E_ADDR_INFO;
82 goto err_out;
83 }
84 ret = dccp_set_socket(pdd->fd);
85 if (ret < 0)
86 goto err_out;
87 PARA_NOTICE_LOG("connecting to %s:%d\n", conf->host_arg, conf->port_arg);
88 ret = -E_DCCP_CONNECT;
89 if (connect(pdd->fd, ai->ai_addr, ai->ai_addrlen) < 0)
90 goto err_out;
91 return 1;
92 err_out:
93 dccp_recv_close(rn);
94 return ret;
95 }
96
97 static void dccp_shutdown(void)
98 {
99 ; /* nothing to do */
100 }
101
102 static void *dccp_recv_parse_config(int argc, char **argv)
103 {
104 struct gengetopt_args_info *tmp = para_calloc(sizeof(struct gengetopt_args_info));
105
106 if (!dccp_recv_cmdline_parser(argc, argv, tmp))
107 return tmp;
108 free(tmp);
109 return NULL;
110 }
111
112 static int dccp_recv_pre_select(struct receiver_node *rn, fd_set *rfds,
113 __unused fd_set *wfds, __unused struct timeval *timeout)
114 {
115 struct private_dccp_recv_data *pdd = rn->private_data;
116
117 if (pdd)
118 FD_SET(pdd->fd, rfds);
119 return pdd->fd;
120 }
121
122 static int dccp_recv_post_select(struct receiver_node *rn, int select_ret,
123 fd_set *rfds, __unused fd_set *wfds)
124 {
125 int ret;
126 struct private_dccp_recv_data *pdd = rn->private_data;
127
128 if (!select_ret || !pdd || !FD_ISSET(pdd->fd, rfds))
129 return 1; /* nothing to do */
130 if (rn->loaded >= DCCP_BUFSIZE)
131 return -E_DCCP_OVERRUN;
132 ret = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded,
133 DCCP_BUFSIZE - rn->loaded);
134 if (ret <= 0)
135 return ret;
136 rn->loaded += ret;
137 return 1;
138 }
139
140 /**
141 * the init function of the dccp receiver
142 *
143 * \param r pointer to the receiver struct to initialize
144 *
145 * Initialize all function pointers of \a r
146 */
147 void dccp_recv_init(struct receiver *r)
148 {
149 r->shutdown = dccp_shutdown;
150 r->open = dccp_recv_open;
151 r->close = dccp_recv_close;
152 r->pre_select = dccp_recv_pre_select;
153 r->post_select = dccp_recv_post_select;
154 r->parse_config = dccp_recv_parse_config;
155 }