05_DCCP-Remove-Unused.diff
[paraslash.git] / dccp_recv.c
1 /*
2 * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file dccp_recv.c paraslash's dccp receiver */
8
9 /*
10 * based on client.c of dccp-cs-0.01.tar.bz2,
11 * (C) 2005 Ian McDonald <imcdnzl@gmail.com>
12 */
13
14 #include <sys/types.h>
15 #include <dirent.h>
16
17 #include "para.h"
18 #include "error.h"
19 #include "list.h"
20 #include "sched.h"
21 #include "recv.h"
22 #include "string.h"
23 #include "net.h"
24 #include "fd.h"
25
26 #include "dccp_recv.cmdline.h"
27
28 /** the size of the output buffer */
29 #define DCCP_BUFSIZE 40960
30
31 /**
32 * data specific to the dccp receiver
33 *
34 * \sa receiver receiver_node
35 */
36 struct private_dccp_recv_data {
37 /** the file descriptor for the dccp socket */
38 int fd;
39 };
40
41
42 static void dccp_recv_close(struct receiver_node *rn)
43 {
44
45 struct private_dccp_recv_data *pdd = rn->private_data;
46
47 if (pdd && pdd->fd > 0)
48 close(pdd->fd);
49 free(rn->buf);
50 rn->buf = NULL;
51 free(rn->private_data);
52 rn->private_data = NULL;
53 }
54
55
56 static int dccp_recv_open(struct receiver_node *rn)
57 {
58 struct private_dccp_recv_data *pdd;
59 struct dccp_recv_args_info *conf = rn->conf;
60 int ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg, conf->port_arg);
61
62 if (ret < 0)
63 return ret;
64
65 rn->buf = para_calloc(DCCP_BUFSIZE);
66 rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data));
67
68 pdd->fd = ret;
69 mark_fd_nonblocking(pdd->fd);
70 return 1;
71 }
72
73 static void dccp_shutdown(void)
74 {
75 ; /* nothing to do */
76 }
77
78 static void *dccp_recv_parse_config(int argc, char **argv)
79 {
80 struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info));
81
82 if (!dccp_recv_cmdline_parser(argc, argv, tmp))
83 return tmp;
84 free(tmp);
85 return NULL;
86 }
87
88 static void dccp_recv_pre_select(struct sched *s, struct task *t)
89 {
90 struct receiver_node *rn = t->private_data;
91 struct private_dccp_recv_data *pdd = rn->private_data;
92
93 t->ret = 1;
94 para_fd_set(pdd->fd, &s->rfds, &s->max_fileno);
95 }
96
97 static void dccp_recv_post_select(struct sched *s, struct task *t)
98 {
99 struct receiver_node *rn = t->private_data;
100 struct private_dccp_recv_data *pdd = rn->private_data;
101
102 t->ret = -E_DCCP_RECV_EOF;
103 if (rn->output_eof && *rn->output_eof)
104 goto out;
105 t->ret = 1;
106 if (!s->select_ret || !FD_ISSET(pdd->fd, &s->rfds))
107 goto out; /* nothing to do */
108 t->ret = -E_DCCP_OVERRUN;
109 if (rn->loaded >= DCCP_BUFSIZE)
110 goto out;
111 t->ret = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded,
112 DCCP_BUFSIZE - rn->loaded);
113 if (t->ret <= 0) {
114 if (!t->ret)
115 t->ret = -E_DCCP_RECV_EOF;
116 goto out;
117 }
118 rn->loaded += t->ret;
119 return;
120 out:
121 if (t->ret < 0)
122 rn->eof = 1;
123 }
124
125 /**
126 * the init function of the dccp receiver
127 *
128 * \param r pointer to the receiver struct to initialize
129 *
130 * Initialize all function pointers of \a r
131 */
132 void dccp_recv_init(struct receiver *r)
133 {
134 r->shutdown = dccp_shutdown;
135 r->open = dccp_recv_open;
136 r->close = dccp_recv_close;
137 r->pre_select = dccp_recv_pre_select;
138 r->post_select = dccp_recv_post_select;
139 r->parse_config = dccp_recv_parse_config;
140 }