Kill fields buf, loaded and output_error of struct receiver node.
[paraslash.git] / dccp_recv.c
1 /*
2 * Copyright (C) 2006-2009 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 <regex.h>
15 #include <sys/types.h>
16 #include <dirent.h>
17
18 #include "para.h"
19 #include "error.h"
20 #include "list.h"
21 #include "sched.h"
22 #include "ggo.h"
23 #include "recv.h"
24 #include "string.h"
25 #include "net.h"
26 #include "fd.h"
27 #include "buffer_tree.h"
28
29 #include "dccp_recv.cmdline.h"
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 struct btr_pool *btrp;
40 };
41
42
43 static void dccp_recv_close(struct receiver_node *rn)
44 {
45
46 struct private_dccp_recv_data *pdd = rn->private_data;
47
48 if (pdd && pdd->fd > 0)
49 close(pdd->fd);
50 free(rn->private_data);
51 rn->private_data = NULL;
52 }
53
54
55 static int dccp_recv_open(struct receiver_node *rn)
56 {
57 struct private_dccp_recv_data *pdd;
58 struct dccp_recv_args_info *conf = rn->conf;
59 int fd, ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg,
60 conf->port_arg);
61
62 if (ret < 0)
63 return ret;
64 fd = ret;
65 /*
66 * Disable unused CCIDs: the receiver does not send any application
67 * data to the server. By shutting down this unused path we reduce
68 * internal processing costs, as the unused CCIDs (in the kernel) are
69 * then bypassed.
70 */
71 if (shutdown(fd, SHUT_WR) < 0) {
72 ret = -ERRNO_TO_PARA_ERROR(errno);
73 goto err;
74 }
75 ret = mark_fd_nonblocking(fd);
76 if (ret < 0)
77 goto err;
78 rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data));
79 pdd->btrp = btr_pool_new("dccp_recv", 320 * 1024);
80 pdd->fd = fd;
81 return 1;
82 err:
83 close(fd);
84 return ret;
85 }
86
87 static void *dccp_recv_parse_config(int argc, char **argv)
88 {
89 struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info));
90
91 if (!dccp_recv_cmdline_parser(argc, argv, tmp))
92 return tmp;
93 free(tmp);
94 return NULL;
95 }
96
97 static void dccp_recv_pre_select(struct sched *s, struct task *t)
98 {
99 struct receiver_node *rn = container_of(t, struct receiver_node, task);
100 struct private_dccp_recv_data *pdd = rn->private_data;
101
102 t->error = 0;
103 if (generic_recv_pre_select(s, t) <= 0)
104 return;
105 para_fd_set(pdd->fd, &s->rfds, &s->max_fileno);
106 }
107
108 static void dccp_recv_post_select(struct sched *s, struct task *t)
109 {
110 struct receiver_node *rn = container_of(t, struct receiver_node, task);
111 struct private_dccp_recv_data *pdd = rn->private_data;
112 struct btr_node *btrn = rn->btrn;
113 int ret;
114 char *buf;
115 size_t sz;
116
117 ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
118 if (ret < 0)
119 goto err;
120 if (ret == 0)
121 return;
122 if (!FD_ISSET(pdd->fd, &s->rfds))
123 return; /* nothing to do */
124 ret = -E_DCCP_OVERRUN;
125 sz = btr_pool_get_buffer(pdd->btrp, &buf);
126 if (sz == 0)
127 goto err;
128 ret = recv_bin_buffer(pdd->fd, buf, sz);
129 if (ret == 0)
130 ret = -E_RECV_EOF;
131 if (ret < 0)
132 goto err;
133 btr_add_output_pool(pdd->btrp, ret, btrn);
134 return;
135 err:
136 btr_remove_node(rn->btrn);
137 t->error = ret;
138 }
139
140 static void dccp_recv_free_config(void *conf)
141 {
142 dccp_recv_cmdline_parser_free(conf);
143 }
144
145 /**
146 * The init function of the dccp receiver.
147 *
148 * \param r Pointer to the receiver struct to initialize.
149 *
150 * Initialize all function pointers of \a r.
151 */
152 void dccp_recv_init(struct receiver *r)
153 {
154 struct dccp_recv_args_info dummy;
155
156 dccp_recv_cmdline_parser_init(&dummy);
157 r->open = dccp_recv_open;
158 r->close = dccp_recv_close;
159 r->pre_select = dccp_recv_pre_select;
160 r->post_select = dccp_recv_post_select;
161 r->parse_config = dccp_recv_parse_config;
162 r->free_config = dccp_recv_free_config;
163 r->help = (struct ggo_help) {
164 .short_help = dccp_recv_args_info_help,
165 .detailed_help = dccp_recv_args_info_detailed_help
166 };
167 dccp_recv_cmdline_parser_free(&dummy);
168 }