请教：如何根据pid找到对应进程正在使有的port
最近在恶赶毕业设计，因为以前做的都是在用户态，现在要做成内核态的，所以要改代码。现在遇到一个问题：如何根据pid找port?
说明一下，我不想用/proc，因为看是看了一下，还是对那个不太了解。
还望哪位读过源码的前辈指教，谢谢
[ 本帖最后由 zz_6_3 于 2010-5-16 21:44 编辑 ] 在网上找了一下，现在换成由inode找也可以，由文件名找也可以。
有没有人知道啊？
我用的是Ubuntu9.10，内核是2.6.31-21generic
在网上许多文章说：
stuct inode
{ ......
union
{ .......
struct socket socket_i
.......
}
........
}
所以看了一下里面的fs.h，但struct inode里面没那个，下面把struct inodu贴一下：
struct inode {
struct hlist_node i_hash;
struct list_head i_list;
struct list_head i_sb_list;
struct list_head i_dentry;
unsigned long i_ino;
atomic_t i_count;
unsigned int i_nlink;
uid_t i_uid;
gid_t i_gid;
dev_t i_rdev;
u64 i_version;
loff_t i_size;
#ifdef __NEED_I_SIZE_ORDERED
seqcount_t i_size_seqcount;
#endif
struct timespec i_atime;
struct timespec i_mtime;
struct timespec i_ctime;
blkcnt_t i_blocks;
unsigned int i_blkbits;
unsigned short i_bytes;
umode_t i_mode;
spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */
struct mutex i_mutex;
struct rw_semaphore i_alloc_sem;
const struct inode_operations *i_op;
const struct file_operations *i_fop; /* former ->i_op->default_file_ops */
struct super_block *i_sb;
struct file_lock *i_flock;
struct address_space *i_mapping;
struct address_space i_data;
#ifdef CONFIG_QUOTA
struct dquot *i_dquot;
#endif
struct list_head i_devices;
union {
struct pipe_inode_info *i_pipe;
struct block_device *i_bdev;
struct cdev *i_cdev;
};
__u32 i_generation;
#ifdef CONFIG_FSNOTIFY
__u32 i_fsnotify_mask; /* all events this inode cares about */
struct hlist_head i_fsnotify_mark_entries; /* fsnotify mark entries */
#endif
#ifdef CONFIG_INOTIFY
struct list_head inotify_watches; /* watches on this inode */
struct mutex inotify_mutex; /* protects the watches list */
#endif
unsigned long i_state;
unsigned long dirtied_when; /* jiffies of first dirtying */
unsigned int i_flags;
atomic_t i_writecount;
#ifdef CONFIG_SECURITY
void *i_security;
#endif
#ifdef CONFIG_FS_POSIX_ACL
struct posix_acl *i_acl;
struct posix_acl *i_default_acl;
#endif
void *i_private; /* fs or device private pointer */
};
fs.h中是这样定义的，应该是封装了，但是不知道在哪个结构里面，哪位看得出来封装到哪个里面了不？
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