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Nginx: fixbug, hijack `getpeername` and `getsockname`.

This commit is contained in:
chenwei 2018-05-27 12:29:26 +08:00
parent deed089a75
commit 4e4a28b584
1 changed files with 32 additions and 3 deletions
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35
app/nginx-1.11.10/src/event/modules/ngx_ff_module.c
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@ -121,6 +121,9 @@ static int (*real_ioctl)(int, int, void *);
static int (*real_gettimeofday)(struct timeval *tv, struct timezone *tz);
static int (*real_getpeername)(int sockfd, struct sockaddr * name, socklen_t *namelen);
static int (*real_getsockname)(int s, struct sockaddr *name, socklen_t *namelen);
static __thread int inited;
#define SYSCALL(func) \
@ -134,7 +137,7 @@ static __thread int inited;
extern intptr_t ngx_max_sockets;
/*-
* Make sockfd assigned by the fstack plus the value of maximum kernel socket.
* Make sockfd assigned by the fstack plus the value of maximum kernel socket.
* so we can tell them apart according to different scopes.
* Solve the condominium ownership at Application Layer and obtain more freedom.
* fstack tried to do this by 'fd_reserve', unfortunately, it doesn't work well.
@ -185,7 +188,7 @@ ff_mod_init(const char *conf, int proc_id, int proc_type) {
if (rc == 0) {
/* Ensure that the socket we converted
does not exceed the maximum value of 'int' */
if(ngx_max_sockets + (unsigned)ff_getmaxfd() > INT_MAX)
{
rc = -1;
@ -269,6 +272,32 @@ connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
return SYSCALL(connect)(sockfd, addr, addrlen);
}
int
getpeername(int sockfd, struct sockaddr * name,
socklen_t *namelen)
{
if(is_fstack_fd(sockfd)){
sockfd = restore_fstack_fd(sockfd);
return ff_getpeername(sockfd,
(struct linux_sockaddr *)name, namelen);
}
return SYSCALL(getpeername)(sockfd, name, namelen);
}
int
getsockname(int sockfd, struct sockaddr *name,
socklen_t *namelen)
{
if(is_fstack_fd(sockfd)){
sockfd = restore_fstack_fd(sockfd);
return ff_getsockname(sockfd,
(struct linux_sockaddr *)name, namelen);
}
return SYSCALL(getsockname)(sockfd, name, namelen);
}
ssize_t
send(int sockfd, const void *buf, size_t len, int flags)
{
@ -477,7 +506,7 @@ kqueue(void)
}
int
kevent(int kq, const struct kevent *changelist, int nchanges,
kevent(int kq, const struct kevent *changelist, int nchanges,
struct kevent *eventlist, int nevents, const struct timespec *timeout)
{
struct kevent *kev;