connect
Implemented in Antinomie 0.7.0 · Syscall list
Synopsis
Section titled “Synopsis”long connect(int fd, struct sockaddr *uservaddr, int addrlen);| Number (x86-64) | 42 |
| ABI | common |
| Kernel entry point | sys_connect |
This is the raw kernel prototype from the pinned Linux 6.12.94 schema, not the libc wrapper.
Description
Section titled “Description”Connects a socket to a remote or local address. For non-blocking sockets it can return EINPROGRESS.
Arguments
Section titled “Arguments”| Name | Type | Meaning |
|---|---|---|
fd (arg0) |
int |
Socket to connect. |
uservaddr (arg1) |
struct sockaddr * |
Pointer to the destination socket address. |
addrlen (arg2) |
int |
Size of that address. |
Return value
Section titled “Return value”On success: 0.
In an Antinomie trace the Return column and the ret filter field show the raw kernel return value. On failure that is the negative errno, for example -2 for ENOENT, not the -1 plus errno that the libc wrapper gives. syscall.errno holds the positive errno and syscall.success is false.
Common errors
Section titled “Common errors”| Raw return | Name | Meaning |
|---|---|---|
-111 |
ECONNREFUSED |
The connection was refused. |
-115 |
EINPROGRESS |
A non-blocking operation has started and is still in progress. |
-110 |
ETIMEDOUT |
The operation timed out. |
-101 |
ENETUNREACH |
The network is unreachable. |
Man page
Section titled “Man page”Captured by Antinomie
Section titled “Captured by Antinomie”Coverage mark: Implemented. Every pointer argument has a capture rule in the pinned kernel patch and none of them records a “no decoder”, “address only” or “not observed” gap on any code path. Individual values can still be incomplete on a particular call; see the capture statuses.
Every call is recorded as an Entry record (the six argument words and the pointees copied at entry) and an Exit record (the return value and the pointees copied at exit).
Arguments
Section titled “Arguments”| Argument | When | How | Recorded field key | Condition |
|---|---|---|---|---|
fd (arg0) |
Entry | raw scalar word | args.0, args.fd |
|
uservaddr (arg1) |
Entry | the pointer itself, as a raw word | args.1, args.raw[1] |
|
| ↳ pointee | Entry | socket address (sockaddr layout), length from addrlen (arg2); “invalid extent” above sizeof(sockaddr_storage) |
arg1.address |
always |
addrlen (arg2) |
Entry | raw scalar word | args.2, args.addrlen |
Filter fields
Section titled “Filter fields”- Result:
ret,syscall.errno,syscall.success,syscall.duration_ns. - Argument words:
args.fd(arg0),args.uservaddr(arg1),args.addrlen(arg2);args.0toargs.5by position. - Structure
sockaddrbehinduservaddr(arg1):args.uservaddr.<member>forsa_family.
See Syscall Trace filter for the full syntax.
For what the capture statuses mean, see Capture statuses. For what is never recorded, see Known gaps.