| 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 <fcntl.h> |
| 26 | #include <errno.h> |
| 27 | #include <string.h> |
| 28 | |
| 29 | #ifdef HAVE_CONFIG_H |
| 30 | #include <config.h> |
| 31 | #endif |
| 32 | #include <utils.h> |
| 33 | #include <req.h> |
| 34 | #include <mt.h> |
| 35 | #include <mtio.h> |
| 36 | #include <log.h> |
| 37 | |
| 38 | #include "htparser.h" |
| 39 | |
| 40 | struct tcpport { |
| 41 | int fd; |
| 42 | int sport; |
| 43 | }; |
| 44 | |
| 45 | struct tcpconn { |
| 46 | struct sockaddr_storage name; |
| 47 | struct tcpport *port; |
| 48 | int fd; |
| 49 | }; |
| 50 | |
| 51 | int listensock4(int port) |
| 52 | { |
| 53 | struct sockaddr_in name; |
| 54 | int fd; |
| 55 | int valbuf; |
| 56 | |
| 57 | memset(&name, 0, sizeof(name)); |
| 58 | name.sin_family = AF_INET; |
| 59 | name.sin_port = htons(port); |
| 60 | if((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0) |
| 61 | return(-1); |
| 62 | valbuf = 1; |
| 63 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &valbuf, sizeof(valbuf)); |
| 64 | if(bind(fd, (struct sockaddr *)&name, sizeof(name))) { |
| 65 | close(fd); |
| 66 | return(-1); |
| 67 | } |
| 68 | if(listen(fd, 128) < 0) { |
| 69 | close(fd); |
| 70 | return(-1); |
| 71 | } |
| 72 | fcntl(fd, F_SETFD, FD_CLOEXEC); |
| 73 | return(fd); |
| 74 | } |
| 75 | |
| 76 | int listensock6(int port) |
| 77 | { |
| 78 | struct sockaddr_in6 name; |
| 79 | int fd; |
| 80 | int valbuf; |
| 81 | |
| 82 | memset(&name, 0, sizeof(name)); |
| 83 | name.sin6_family = AF_INET6; |
| 84 | name.sin6_port = htons(port); |
| 85 | if((fd = socket(PF_INET6, SOCK_STREAM, 0)) < 0) |
| 86 | return(-1); |
| 87 | valbuf = 1; |
| 88 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &valbuf, sizeof(valbuf)); |
| 89 | if(bind(fd, (struct sockaddr *)&name, sizeof(name))) { |
| 90 | close(fd); |
| 91 | return(-1); |
| 92 | } |
| 93 | if(listen(fd, 128) < 0) { |
| 94 | close(fd); |
| 95 | return(-1); |
| 96 | } |
| 97 | fcntl(fd, F_SETFD, FD_CLOEXEC); |
| 98 | return(fd); |
| 99 | } |
| 100 | |
| 101 | char *formathaddress(struct sockaddr *name, socklen_t namelen) |
| 102 | { |
| 103 | static char buf[128]; |
| 104 | struct sockaddr_in *v4; |
| 105 | struct sockaddr_in6 *v6; |
| 106 | |
| 107 | switch(name->sa_family) { |
| 108 | case AF_INET: |
| 109 | v4 = (struct sockaddr_in *)name; |
| 110 | if(!inet_ntop(AF_INET, &v4->sin_addr, buf, sizeof(buf))) |
| 111 | return(NULL); |
| 112 | return(buf); |
| 113 | case AF_INET6: |
| 114 | v6 = (struct sockaddr_in6 *)name; |
| 115 | if(IN6_IS_ADDR_V4MAPPED(&v6->sin6_addr)) { |
| 116 | if(!inet_ntop(AF_INET, ((char *)&v6->sin6_addr) + 12, buf, sizeof(buf))) |
| 117 | return(NULL); |
| 118 | } else { |
| 119 | if(!inet_ntop(AF_INET6, &v6->sin6_addr, buf, sizeof(buf))) |
| 120 | return(NULL); |
| 121 | } |
| 122 | return(buf); |
| 123 | default: |
| 124 | errno = EPFNOSUPPORT; |
| 125 | return(NULL); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | static int initreq(struct conn *conn, struct hthead *req) |
| 130 | { |
| 131 | struct tcpconn *tcp = conn->pdata; |
| 132 | struct sockaddr_storage sa; |
| 133 | socklen_t salen; |
| 134 | |
| 135 | headappheader(req, "X-Ash-Address", formathaddress((struct sockaddr *)&tcp->name, sizeof(sa))); |
| 136 | if(tcp->name.ss_family == AF_INET) |
| 137 | headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in *)&tcp->name)->sin_port))); |
| 138 | else if(tcp->name.ss_family == AF_INET6) |
| 139 | headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in6 *)&tcp->name)->sin6_port))); |
| 140 | salen = sizeof(sa); |
| 141 | if(!getsockname(tcp->fd, (struct sockaddr *)&sa, &salen)) |
| 142 | headappheader(req, "X-Ash-Server-Address", formathaddress((struct sockaddr *)&sa, sizeof(sa))); |
| 143 | headappheader(req, "X-Ash-Server-Port", sprintf3("%i", tcp->port->sport)); |
| 144 | headappheader(req, "X-Ash-Protocol", "http"); |
| 145 | return(0); |
| 146 | } |
| 147 | |
| 148 | void servetcp(struct muth *muth, va_list args) |
| 149 | { |
| 150 | vavar(int, fd); |
| 151 | vavar(struct sockaddr_storage, name); |
| 152 | vavar(struct tcpport *, stcp); |
| 153 | struct bufio *in; |
| 154 | struct conn conn; |
| 155 | struct tcpconn tcp; |
| 156 | |
| 157 | memset(&conn, 0, sizeof(conn)); |
| 158 | memset(&tcp, 0, sizeof(tcp)); |
| 159 | in = mtbioopen(fd, 1, 60, "r+", NULL); |
| 160 | conn.pdata = &tcp; |
| 161 | conn.initreq = initreq; |
| 162 | tcp.fd = fd; |
| 163 | tcp.name = name; |
| 164 | tcp.port = stcp; |
| 165 | serve(in, fd, &conn); |
| 166 | } |
| 167 | |
| 168 | static void listenloop(struct muth *muth, va_list args) |
| 169 | { |
| 170 | vavar(struct tcpport *, tcp); |
| 171 | int i, ns, n; |
| 172 | struct sockaddr_storage name; |
| 173 | socklen_t namelen; |
| 174 | |
| 175 | fcntl(tcp->fd, F_SETFL, fcntl(tcp->fd, F_GETFL) | O_NONBLOCK); |
| 176 | while(1) { |
| 177 | namelen = sizeof(name); |
| 178 | if(block(tcp->fd, EV_READ, 0) == 0) |
| 179 | goto out; |
| 180 | n = 0; |
| 181 | while(1) { |
| 182 | ns = accept(tcp->fd, (struct sockaddr *)&name, &namelen); |
| 183 | if(ns < 0) { |
| 184 | if(errno == EAGAIN) |
| 185 | break; |
| 186 | if(errno == ECONNABORTED) |
| 187 | continue; |
| 188 | flog(LOG_ERR, "accept: %s", strerror(errno)); |
| 189 | goto out; |
| 190 | } |
| 191 | mustart(servetcp, ns, name, tcp); |
| 192 | if(++n >= 100) |
| 193 | break; |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | out: |
| 198 | close(tcp->fd); |
| 199 | free(tcp); |
| 200 | for(i = 0; i < listeners.d; i++) { |
| 201 | if(listeners.b[i] == muth) |
| 202 | bufdel(listeners, i); |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | void handleplain(int argc, char **argp, char **argv) |
| 207 | { |
| 208 | int port, fd; |
| 209 | int i; |
| 210 | struct tcpport *tcp; |
| 211 | |
| 212 | port = 80; |
| 213 | for(i = 0; i < argc; i++) { |
| 214 | if(!strcmp(argp[i], "help")) { |
| 215 | printf("plain handler parameters:\n"); |
| 216 | printf("\tport=TCP-PORT [80]\n"); |
| 217 | printf("\t\tThe TCP port to listen on.\n"); |
| 218 | exit(0); |
| 219 | } else if(!strcmp(argp[i], "port")) { |
| 220 | port = atoi(argv[i]); |
| 221 | } else { |
| 222 | flog(LOG_ERR, "unknown parameter `%s' to plain handler", argp[i]); |
| 223 | exit(1); |
| 224 | } |
| 225 | } |
| 226 | if((fd = listensock6(port)) < 0) { |
| 227 | flog(LOG_ERR, "could not listen on IPv6 (port %i): %s", port, strerror(errno)); |
| 228 | exit(1); |
| 229 | } |
| 230 | omalloc(tcp); |
| 231 | tcp->fd = fd; |
| 232 | tcp->sport = port; |
| 233 | bufadd(listeners, mustart(listenloop, tcp)); |
| 234 | if((fd = listensock4(port)) < 0) { |
| 235 | if(errno != EADDRINUSE) { |
| 236 | flog(LOG_ERR, "could not listen on IPv4 (port %i): %s", port, strerror(errno)); |
| 237 | exit(1); |
| 238 | } |
| 239 | } else { |
| 240 | omalloc(tcp); |
| 241 | tcp->fd = fd; |
| 242 | tcp->sport = port; |
| 243 | bufadd(listeners, mustart(listenloop, tcp)); |
| 244 | } |
| 245 | } |