X-Git-Url: http://www.dolda2000.com/gitweb/?a=blobdiff_plain;f=src%2Fhtparser.c;h=4086f7926eacc01fc17c15c5d4c3cf757ef751f0;hb=9e70ef793ddcf51edc0f6489eb6f70762380afc0;hp=4325e975a9cb22f537439dfde0f05c3e8060bd97;hpb=18fb436dba91930a8d60c1d343c50b55b55a4c37;p=ashd.git diff --git a/src/htparser.c b/src/htparser.c index 4325e97..4086f79 100644 --- a/src/htparser.c +++ b/src/htparser.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -39,6 +40,7 @@ static int plex; static char *pidfile = NULL; +static int daemonize, usesyslog; static void trimx(struct hthead *req) { @@ -75,6 +77,8 @@ static struct hthead *parsereq(FILE *in) goto fail; } else { bufadd(method, c); + if(method.d >= 128) + goto fail; } } while(1) { @@ -85,6 +89,8 @@ static struct hthead *parsereq(FILE *in) goto fail; } else { bufadd(url, c); + if(url.d >= 65536) + goto fail; } } while(1) { @@ -96,6 +102,8 @@ static struct hthead *parsereq(FILE *in) goto fail; } else { bufadd(ver, c); + if(ver.d >= 128) + goto fail; } } bufadd(method, 0); @@ -119,66 +127,6 @@ out: return(req); } -static struct hthead *parseresp(FILE *in) -{ - struct hthead *req; - int code; - struct charbuf ver, msg; - int c; - - req = NULL; - bufinit(ver); - bufinit(msg); - code = 0; - while(1) { - c = getc(in); - if(c == ' ') { - break; - } else if((c == EOF) || (c < 32) || (c >= 128)) { - goto fail; - } else { - bufadd(ver, c); - } - } - while(1) { - c = getc(in); - if(c == ' ') { - break; - } else if((c == EOF) || (c < '0') || (c > '9')) { - goto fail; - } else { - code = (code * 10) + (c - '0'); - } - } - while(1) { - c = getc(in); - if(c == 10) { - break; - } else if(c == 13) { - } else if((c == EOF) || (c < 32)) { - goto fail; - } else { - bufadd(msg, c); - } - } - bufadd(msg, 0); - bufadd(ver, 0); - req = mkresp(code, msg.b, ver.b); - if(parseheaders(req, in)) - goto fail; - goto out; - -fail: - if(req != NULL) { - freehthead(req); - req = NULL; - } -out: - buffree(msg); - buffree(ver); - return(req); -} - static off_t passdata(FILE *in, FILE *out, off_t max) { size_t read; @@ -226,24 +174,74 @@ static int hasheader(struct hthead *head, char *name, char *val) return(!strcasecmp(hd, val)); } +static int canonreq(struct hthead *req) +{ + char *p, *p2, *r; + int n; + + if(req->url[0] == '/') { + replrest(req, req->url + 1); + if((p = strchr(req->rest, '?')) != NULL) + *p = 0; + return(1); + } + if((p = strstr(req->url, "://")) != NULL) { + n = p - req->url; + if(((n == 4) && !strncasecmp(req->url, "http", 4)) || + ((n == 5) && !strncasecmp(req->url, "https", 5))) { + if(getheader(req, "host")) + return(0); + p += 3; + if((p2 = strchr(p, '/')) == NULL) { + headappheader(req, "Host", p); + free(req->url); + req->url = sstrdup("/"); + } else { + r = sstrdup(p2); + *(p2++) = 0; + headappheader(req, "Host", p); + free(req->url); + req->url = r; + } + replrest(req, req->url + 1); + if((p = strchr(req->rest, '?')) != NULL) + *p = 0; + return(1); + } + } + return(0); +} + +static int http10keep(struct hthead *req, struct hthead *resp) +{ + int fc; + + fc = hasheader(resp, "connection", "close"); + headrmheader(resp, "connection"); + if(!fc && hasheader(req, "connection", "keep-alive")) { + headappheader(resp, "Connection", "Keep-Alive"); + return(1); + } else { + return(0); + } +} + void serve(FILE *in, struct conn *conn) { int pfds[2]; FILE *out; struct hthead *req, *resp; - char *hd, *p; + char *hd; off_t dlen; + int keep; out = NULL; req = resp = NULL; while(1) { if((req = parsereq(in)) == NULL) break; - replrest(req, req->url); - if(req->rest[0] == '/') - replrest(req, req->rest + 1); - if((p = strchr(req->rest, '?')) != NULL) - *p = 0; + if(!canonreq(req)) + break; if((conn->initreq != NULL) && conn->initreq(conn, req)) break; @@ -269,27 +267,33 @@ void serve(FILE *in, struct conn *conn) /* Make sure to send EOF */ shutdown(pfds[1], SHUT_WR); - if((resp = parseresp(out)) == NULL) + if((resp = parseresponse(out)) == NULL) break; replstr(&resp->ver, req->ver); + + if(!getheader(resp, "server")) + headappheader(resp, "Server", sprintf3("ashd/%s", VERSION)); if(!strcmp(req->ver, "HTTP/1.0")) { - writeresp(in, resp); - fprintf(in, "\r\n"); if(!strcasecmp(req->method, "head")) { - if(!hasheader(req, "connection", "keep-alive")) - break; + keep = http10keep(req, resp); + writeresp(in, resp); + fprintf(in, "\r\n"); } else if((hd = getheader(resp, "content-length")) != NULL) { - dlen = passdata(out, in, -1); - if(dlen != atoo(hd)) - break; - if(!hasheader(req, "connection", "keep-alive")) + keep = http10keep(req, resp); + dlen = atoo(hd); + writeresp(in, resp); + fprintf(in, "\r\n"); + if(passdata(out, in, dlen) != dlen) break; } else { + headrmheader(resp, "connection"); + writeresp(in, resp); + fprintf(in, "\r\n"); passdata(out, in, -1); break; } - if(hasheader(req, "connection", "close") || hasheader(resp, "connection", "close")) + if(!keep) break; } else if(!strcmp(req->ver, "HTTP/1.1")) { if(!strcasecmp(req->method, "head")) { @@ -298,8 +302,8 @@ void serve(FILE *in, struct conn *conn) } else if((hd = getheader(resp, "content-length")) != NULL) { writeresp(in, resp); fprintf(in, "\r\n"); - dlen = passdata(out, in, -1); - if(dlen != atoo(hd)) + dlen = atoo(hd); + if(passdata(out, in, dlen) != dlen) break; } else if(!getheader(resp, "transfer-encoding")) { headappheader(resp, "Transfer-Encoding", "chunked"); @@ -357,6 +361,26 @@ static void plexwatch(struct muth *muth, va_list args) } } +static void initroot(void *uu) +{ + int fd; + + if(daemonize) { + setsid(); + chdir("/"); + if((fd = open("/dev/null", O_RDWR)) >= 0) { + dup2(fd, 0); + dup2(fd, 1); + dup2(fd, 2); + close(fd); + } + } + if(usesyslog) + putenv("ASHD_USESYSLOG=1"); + else + unsetenv("ASHD_USESYSLOG"); +} + static void usage(FILE *out) { fprintf(out, "usage: htparser [-hSf] [-u USER] [-r ROOT] [-p PIDFILE] PORTSPEC... -- ROOT [ARGS...]\n"); @@ -413,12 +437,11 @@ int main(int argc, char **argv) { int c; int i, s1; - int daemonize, logsys; char *root; FILE *pidout; struct passwd *pwent; - daemonize = logsys = 0; + daemonize = usesyslog = 0; root = NULL; pwent = NULL; while((c = getopt(argc, argv, "+hSfu:r:p:")) >= 0) { @@ -430,7 +453,7 @@ int main(int argc, char **argv) daemonize = 1; break; case 'S': - logsys = 1; + usesyslog = 1; break; case 'u': if((pwent = getpwnam(optarg)) == NULL) { @@ -460,7 +483,7 @@ int main(int argc, char **argv) usage(stderr); exit(1); } - if((plex = stdmkchild(argv + ++i, NULL, NULL)) < 0) { + if((plex = stdmkchild(argv + ++i, initroot, NULL)) < 0) { flog(LOG_ERR, "could not spawn root multiplexer: %s", strerror(errno)); return(1); } @@ -472,10 +495,10 @@ int main(int argc, char **argv) return(1); } } - if(logsys) + if(usesyslog) opensyslog(); if(root) { - if(chroot(root)) { + if(chdir(root) || chroot(root)) { flog(LOG_ERR, "could not chroot to %s: %s", root, strerror(errno)); exit(1); }