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common.c
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common.c
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#include "gatling.h"
#include "io.h"
#include "byte.h"
#include "str.h"
#include "ip6.h"
#include "fmt.h"
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include "havealloca.h"
size_t max_handles=100;
int open_for_reading(int64* fd,const char* name,struct stat* SS) {
/* only allow reading of world readable files */
if (io_readfile(fd,name)) {
#ifdef __MINGW32__
SS->st_size=GetFileSize((HANDLE)(uintptr_t)*fd,0);
#else
struct stat ss;
if (!SS) SS=&ss;
if (fstat(*fd,SS)==-1 || !(SS->st_mode&S_IROTH)) {
close(*fd);
*fd=-1;
return 0;
}
#endif
return 1;
}
return 0;
}
int open_for_writing(int64* fd,const char* name) {
/* only allow creating files in world writable directories */
const char* c;
char* x;
struct stat ss;
c=name+str_rchr(name,'/');
// if (!*c) return 0; /* no slashes? There's something fishy */
if (!*c) {
x=".";
} else {
x=alloca(c-name+1);
byte_copy(x,c-name,name); x[c-name]=0;
}
if (stat(x,&ss)==-1) return 0; /* better safe than sorry */
if (!(ss.st_mode&S_IWOTH)) return 0;
return io_createfile(fd,name);
}
/* "/foo" -> "/foo"
* "/foo/./" -> "/foo"
* "/foo/.." -> "/" */
int canonpath(char* s) {
int i,j; /* i: read index, j: write index */
char c;
for (i=j=0; (c=s[i]); ++i) {
if (c=='/') {
while (s[i+1]=='/') ++i; /* "//" */
} else if (c=='.' && j && s[j-1]=='/') {
if (s[i+1]=='.' && (s[i+2]=='/' || s[i+2]==0)) { /* "/../" */
if (j>1)
for (j-=2; s[j]!='/' && j>0; --j); /* remove previous dir */
else
j=0;
/* s = "/foo/.."
* ^j ^i
*/
++i;
continue;
} else if (s[i+1]=='/' || s[i+1]==0) { /* "/./" */
++i;
continue;
} else
c=':';
}
if (!(s[j]=c)) break; ++j;
}
if (j && s[j-1]=='/') --j;
if (!j) { s[0]='/'; j=1; }
s[j]=0;
return j;
}
struct handle* alloc_handle(struct handles* h) {
size_t i;
for (i=0; i<h->u; ++i)
if (h->h[i].fd==-1)
return &h->h[i];
if (h->u>=h->a) {
void* x;
x=realloc(h->h,(h->a+10)*sizeof(h->h[0]));
if (!x) return 0;
h->h=x;
for (i=0; i<10; ++i) {
h->h[h->a+i].filename=0;
h->h[h->a+i].fd=-1;
}
h->a+=10;
}
if (h->u>=max_handles)
return 0;
h->h[h->u].handle=h->u+1;
return &h->h[h->u++];
}
struct handle* deref_handle(struct handles* h,uint32_t handle) {
size_t i;
for (i=0; i<h->u; ++i)
if (h->h[i].handle==handle)
return &h->h[i];
return 0;
}
void close_handle(struct handle* h) {
if (h->fd!=-1) {
close(h->fd);
free(h->filename);
h->fd=-1;
h->filename=0;
}
}
void close_all_handles(struct handles* h) {
size_t i;
for (i=0; i<h->u; ++i) {
if (h->h[i].fd!=-1)
close(h->h[i].fd);
free(h->h[i].filename);
}
h->u=0;
h->a=0;
free(h->h);
h->h=0;
}
int ip_vhost(struct http_data* h) {
char* y;
int i;
/* construct artificial Host header from IP */
y=alloca(IP6_FMT+7);
i=fmt_ip6c(y,h->myip);
i+=fmt_str(y+i,":");
i+=fmt_ulong(y+i,h->myport);
y[i]=0;
#ifdef __MINGW32__
// printf("chdir(\"%s\") -> %d\n",origdir,chdir(origdir));
chdir(origdir);
#else
fchdir(origdir);
#endif
if (virtual_hosts>=0) {
if (chdir(y)==-1)
if (chdir("default")==-1)
if (virtual_hosts==1) {
h->hdrbuf="425 no such virtual host.\r\n";
return -1;
}
}
return 0;
}
#ifdef STATE_DEBUG
const char* state2string(enum conntype t) {
switch (t) {
case HTTPSERVER6: return "HTTPSERVER6";
case HTTPSERVER4: return "HTTPSERVER4";
case HTTPREQUEST: return "HTTPREQUEST";
#ifdef SUPPORT_FTP
case FTPSERVER6: return "FTPSERVER6";
case FTPSERVER4: return "FTPSERVER4";
case FTPCONTROL6: return "FTPCONTROL6";
case FTPCONTROL4: return "FTPCONTROL4";
case FTPPASSIVE: return "FTPPASSIVE";
case FTPACTIVE: return "FTPACTIVE";
case FTPSLAVE: return "FTPSLAVE";
#endif
#ifdef SUPPORT_SMB
case SMBSERVER6: return "SMBSERVER6";
case SMBSERVER4: return "SMBSERVER4";
case SMBREQUEST: return "SMBREQUEST";
#endif
#ifdef SUPPORT_PROXY
case PROXYSLAVE: return "PROXYSLAVE";
case PROXYPOST: return "PROXYPOST";
case HTTPPOST: return "HTTPPOST";
#endif
#ifdef SUPPORT_HTTPS
case HTTPSSERVER6: return "HTTPSSERVER6";
case HTTPSSERVER4: return "HTTPSSERVER4";
case HTTPSACCEPT: return "HTTPSACCEPT";
case HTTPSACCEPT_CHECK: return "HTTPSACCEPT_CHECK";
case HTTPSREQUEST: return "HTTPSREQUEST";
case HTTPSRESPONSE: return "HTTPSRESPONSE";
case HTTPSPOST: return "HTTPSPOST";
#endif
case PUNISHMENT: return "PUNISHMENT";
default: return "[invalid]";
}
};
#endif