doc: Added manpage for errlogger.
[ashd.git] / src / plaintcp.c
... / ...
CommitLineData
1/*
2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17*/
18
19#include <stdlib.h>
20#include <unistd.h>
21#include <stdio.h>
22#include <sys/socket.h>
23#include <netinet/in.h>
24#include <arpa/inet.h>
25#include <errno.h>
26#include <string.h>
27
28#ifdef HAVE_CONFIG_H
29#include <config.h>
30#endif
31#include <utils.h>
32#include <req.h>
33#include <mt.h>
34#include <mtio.h>
35#include <log.h>
36
37#include "htparser.h"
38
39struct tcpport {
40 int fd;
41 int sport;
42};
43
44struct tcpconn {
45 struct sockaddr_storage name;
46 struct tcpport *port;
47 int fd;
48};
49
50int listensock4(int port)
51{
52 struct sockaddr_in name;
53 int fd;
54 int valbuf;
55
56 memset(&name, 0, sizeof(name));
57 name.sin_family = AF_INET;
58 name.sin_port = htons(port);
59 if((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
60 return(-1);
61 valbuf = 1;
62 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &valbuf, sizeof(valbuf));
63 if(bind(fd, (struct sockaddr *)&name, sizeof(name))) {
64 close(fd);
65 return(-1);
66 }
67 if(listen(fd, 16) < 0) {
68 close(fd);
69 return(-1);
70 }
71 return(fd);
72}
73
74int listensock6(int port)
75{
76 struct sockaddr_in6 name;
77 int fd;
78 int valbuf;
79
80 memset(&name, 0, sizeof(name));
81 name.sin6_family = AF_INET6;
82 name.sin6_port = htons(port);
83 if((fd = socket(PF_INET6, SOCK_STREAM, 0)) < 0)
84 return(-1);
85 valbuf = 1;
86 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &valbuf, sizeof(valbuf));
87 if(bind(fd, (struct sockaddr *)&name, sizeof(name))) {
88 close(fd);
89 return(-1);
90 }
91 if(listen(fd, 16) < 0) {
92 close(fd);
93 return(-1);
94 }
95 return(fd);
96}
97
98char *formathaddress(struct sockaddr *name, socklen_t namelen)
99{
100 static char buf[128];
101 struct sockaddr_in *v4;
102 struct sockaddr_in6 *v6;
103
104 switch(name->sa_family) {
105 case AF_INET:
106 v4 = (struct sockaddr_in *)name;
107 if(!inet_ntop(AF_INET, &v4->sin_addr, buf, sizeof(buf)))
108 return(NULL);
109 return(buf);
110 case AF_INET6:
111 v6 = (struct sockaddr_in6 *)name;
112 if(IN6_IS_ADDR_V4MAPPED(&v6->sin6_addr)) {
113 if(!inet_ntop(AF_INET, ((char *)&v6->sin6_addr) + 12, buf, sizeof(buf)))
114 return(NULL);
115 } else {
116 if(!inet_ntop(AF_INET6, &v6->sin6_addr, buf, sizeof(buf)))
117 return(NULL);
118 }
119 return(buf);
120 default:
121 errno = EPFNOSUPPORT;
122 return(NULL);
123 }
124}
125
126static int initreq(struct conn *conn, struct hthead *req)
127{
128 struct tcpconn *tcp = conn->pdata;
129 struct sockaddr_storage sa;
130 socklen_t salen;
131
132 headappheader(req, "X-Ash-Address", formathaddress((struct sockaddr *)&tcp->name, sizeof(sa)));
133 if(tcp->name.ss_family == AF_INET)
134 headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in *)&tcp->name)->sin_port)));
135 else if(tcp->name.ss_family == AF_INET6)
136 headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in6 *)&tcp->name)->sin6_port)));
137 salen = sizeof(sa);
138 if(!getsockname(tcp->fd, (struct sockaddr *)&sa, &salen))
139 headappheader(req, "X-Ash-Server-Address", formathaddress((struct sockaddr *)&sa, sizeof(sa)));
140 headappheader(req, "X-Ash-Server-Port", sprintf3("%i", tcp->port->sport));
141 headappheader(req, "X-Ash-Protocol", "http");
142 return(0);
143}
144
145void servetcp(struct muth *muth, va_list args)
146{
147 vavar(int, fd);
148 vavar(struct sockaddr_storage, name);
149 vavar(struct tcpport *, stcp);
150 FILE *in;
151 struct conn conn;
152 struct tcpconn tcp;
153
154 memset(&conn, 0, sizeof(conn));
155 memset(&tcp, 0, sizeof(tcp));
156 in = mtstdopen(fd, 1, 60, "r+");
157 conn.pdata = &tcp;
158 conn.initreq = initreq;
159 tcp.fd = fd;
160 tcp.name = name;
161 tcp.port = stcp;
162 serve(in, &conn);
163}
164
165static void listenloop(struct muth *muth, va_list args)
166{
167 vavar(struct tcpport *, tcp);
168 int ns;
169 struct sockaddr_storage name;
170 socklen_t namelen;
171
172 while(1) {
173 namelen = sizeof(name);
174 block(tcp->fd, EV_READ, 0);
175 ns = accept(tcp->fd, (struct sockaddr *)&name, &namelen);
176 if(ns < 0) {
177 flog(LOG_ERR, "accept: %s", strerror(errno));
178 goto out;
179 }
180 mustart(servetcp, ns, name, tcp);
181 }
182
183out:
184 close(tcp->fd);
185 free(tcp);
186}
187
188void handleplain(int argc, char **argp, char **argv)
189{
190 int port, fd;
191 int i;
192 struct tcpport *tcp;
193
194 port = 80;
195 for(i = 0; i < argc; i++) {
196 if(!strcmp(argp[i], "help")) {
197 printf("plain handler parameters:\n");
198 printf("\tport=TCP-PORT [80]\n");
199 printf("\t\tThe TCP port to listen on.\n");
200 exit(0);
201 } else if(!strcmp(argp[i], "port")) {
202 port = atoi(argv[i]);
203 } else {
204 flog(LOG_ERR, "unknown parameter `%s' to plain handler", argp[i]);
205 exit(1);
206 }
207 }
208 if((fd = listensock6(port)) < 0) {
209 flog(LOG_ERR, "could not listen on IPv6 (port %i): %s", port, strerror(errno));
210 exit(1);
211 }
212 omalloc(tcp);
213 tcp->fd = fd;
214 tcp->sport = port;
215 mustart(listenloop, tcp);
216 if((fd = listensock4(port)) < 0) {
217 if(errno != EADDRINUSE) {
218 flog(LOG_ERR, "could not listen on IPv4 (port %i): %s", port, strerror(errno));
219 exit(1);
220 }
221 } else {
222 omalloc(tcp);
223 tcp->fd = fd;
224 tcp->sport = port;
225 mustart(listenloop, tcp);
226 }
227}