зеркало из https://github.com/microsoft/git.git
Add first cut at "git protocol" connect logic.
Useful for pulling stuff off a dedicated server. Instead of connecting with ssh or just starting a local pipeline, we connect over TCP to the other side and try to see if there's a git server listening. Of course, since I haven't written the git server yet, that will never happen. But the server really just needs to listen on a port, and execute a "git-upload-pack" when somebody connects. (It should read one packet-line, which should be of the format "git-upload-pack directoryname\n" and eventually we migth have other commands the server might accept).
This commit is contained in:
Родитель
2408cff9f7
Коммит
2386d65822
10
cache.h
10
cache.h
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@ -40,6 +40,16 @@
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#define NORETURN
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#define NORETURN
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#endif
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#endif
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/*
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* Intensive research over the course of many years has shown that
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* port 9418 is totally unused by anything else. Or
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*
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* Your search - "port 9418" - did not match any documents.
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*
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* as www.google.com puts it.
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*/
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#define DEFAULT_GIT_PORT 9418
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/*
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/*
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* Environment variables transition.
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* Environment variables transition.
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* We accept older names for now but warn.
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* We accept older names for now but warn.
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83
connect.c
83
connect.c
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@ -2,6 +2,10 @@
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#include "pkt-line.h"
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#include "pkt-line.h"
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#include "quote.h"
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#include "quote.h"
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#include <sys/wait.h>
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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int get_ack(int fd, unsigned char *result_sha1)
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int get_ack(int fd, unsigned char *result_sha1)
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{
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{
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@ -42,25 +46,100 @@ int path_match(const char *path, int nr, char **match)
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return 0;
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return 0;
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}
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}
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enum protocol {
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PROTO_LOCAL = 1,
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PROTO_SSH,
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PROTO_GIT,
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};
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static enum protocol get_protocol(const char *name)
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{
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if (!strcmp(name, "ssh"))
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return PROTO_SSH;
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if (!strcmp(name, "git"))
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return PROTO_GIT;
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die("I don't handle protocol '%s'", name);
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}
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static void lookup_host(const char *host, struct sockaddr *in)
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{
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struct addrinfo *res;
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int ret;
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ret = getaddrinfo(host, NULL, NULL, &res);
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if (ret)
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die("Unable to look up %s (%s)", host, gai_strerror(ret));
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*in = *res->ai_addr;
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freeaddrinfo(res);
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}
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static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
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{
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struct sockaddr addr;
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int port = DEFAULT_GIT_PORT, sockfd;
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char *colon;
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colon = strchr(host, ':');
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if (colon) {
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char *end;
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unsigned long n = strtoul(colon+1, &end, 0);
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if (colon[1] && !*end) {
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*colon = 0;
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port = n;
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}
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}
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lookup_host(host, &addr);
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((struct sockaddr_in *)&addr)->sin_port = htons(port);
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sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_IP);
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if (sockfd < 0)
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die("unable to create socket (%s)", strerror(errno));
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if (connect(sockfd, (void *)&addr, sizeof(addr)) < 0)
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die("unable to connect (%s)", strerror(errno));
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fd[0] = sockfd;
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fd[1] = sockfd;
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packet_write(sockfd, "%s %s\n", prog, path);
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return 0;
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}
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/*
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/*
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* Yeah, yeah, fixme. Need to pass in the heads etc.
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* Yeah, yeah, fixme. Need to pass in the heads etc.
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*/
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*/
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int git_connect(int fd[2], char *url, const char *prog)
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int git_connect(int fd[2], char *url, const char *prog)
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{
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{
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char command[1024];
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char command[1024];
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const char *host, *path;
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char *host, *path;
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char *colon;
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char *colon;
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int pipefd[2][2];
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int pipefd[2][2];
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pid_t pid;
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pid_t pid;
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enum protocol protocol;
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host = NULL;
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host = NULL;
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path = url;
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path = url;
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colon = strchr(url, ':');
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colon = strchr(url, ':');
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protocol = PROTO_LOCAL;
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if (colon) {
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if (colon) {
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*colon = 0;
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*colon = 0;
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host = url;
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host = url;
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path = colon+1;
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path = colon+1;
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protocol = PROTO_SSH;
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if (!memcmp(path, "//", 2)) {
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char *slash = strchr(path + 2, '/');
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if (slash) {
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int nr = slash - path - 2;
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memmove(path, path+2, nr);
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path[nr] = 0;
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protocol = get_protocol(url);
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host = path;
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path = slash;
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}
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}
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}
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}
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if (protocol == PROTO_GIT)
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return git_tcp_connect(fd, prog, host, path);
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if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
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if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
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die("unable to create pipe pair for communication");
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die("unable to create pipe pair for communication");
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pid = fork();
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pid = fork();
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@ -73,7 +152,7 @@ int git_connect(int fd[2], char *url, const char *prog)
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close(pipefd[0][1]);
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close(pipefd[0][1]);
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close(pipefd[1][0]);
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close(pipefd[1][0]);
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close(pipefd[1][1]);
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close(pipefd[1][1]);
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if (host)
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if (protocol == PROTO_SSH)
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execlp("ssh", "ssh", host, command, NULL);
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execlp("ssh", "ssh", host, command, NULL);
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else
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else
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execlp("sh", "sh", "-c", command, NULL);
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execlp("sh", "sh", "-c", command, NULL);
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